National Bureau of Standaras

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JUL 3 1969

Publications of the

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1966-1967 National Bureau of Standards

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United States Department of Commerce

National Bureau of Standards

special Publication 305

UNITED STATES DEPARTMENT OF COMMERCE

MAURICE H. STANS, Secretary

NATIONAL BUREAU OF STANDARDS • A. V. Astin, Director

Publications of the

National Bureau of Standards

1966-1967

Published by NBS

July 1966 -December 1967

Published by Others

1966 - 1967

(With Key-word and Author Indexes)

Betty L. Oberholtzer

U'S, National Bureau of Standards. Special Publication 305

# »

To Accompany National Bureau of Standards Circular 460, its Supplement, Miscellaneous

Publication 240, and its Supplement

Issued April 1969

For sale by the Superintendent of Documents, "U.S. Government Printing Office Washington, D.C. 20402 - Price $2.00
NATIONAL BUREAU OF STANDARDS

30r^3 1 1969

a^i loo

Preface

This publication represents a significant advance in the efforts of the National Bureau

of Standards to mechanize its publication and printing process. While NBS and others

have produced a number of publications using computer-generated tapes to drive phototypesetting machines, this is the first NBS publication typeset from magnetic tape generated on a typewriter-like keyboard tied directly to a computer to have the following

noteworthy features

• Mathematical expressions involving subscripts and superscripts are handled without compromise in notation.

• Greek alphabet characters are handled explicitly and may appear on the line, or in

superior or inferior positions.

• The information for the key-word and author indexes was extracted from the

original input text and permuted by a computer program that also has more general application.

• As an important secondary objective, this printing mechanization has provided

magnetic tapes suitable for inclusion in a computerized information system now

under development at NBS.

Mechanization in the production of this publication and the computer programs that

made it possible are the result of the cooperative efforts of the Data Systems Design Group

of the NBS Office of Standard Reference Data and the Computer-Assisted Printing Section of the NBS Office of Technical Information and Publications.

Though many staff members participated in these efforts, I would like to cite the

special contributions of Betty Oberholtzer, Rubin Wagner, Rebecca Morehouse, Robert

Thompson, and Joseph Hilsenrath.

W. R. TiLLEY, Chief,

Office of Technical Information

and Publications.
Contents

Page

Preface III NBS Publications Program IV

1. General Information V

1.1. Purchase Procedures V

1.2. Announcements of NBS Publications V

1.3. Catalogs of NBS Publications VI

1.4. Depository Libraries in the United States VI

1.5. Field Offices of the U.S. Department of Commerce VI

2. Description of NBS Periodicals and Nonperiodicals VI

2.1. Journal of Research, Sections A, B, and C VI

2.2. Technical News Bulletin VII

2.3. Periodical Subscription Rates VII

2.4. Nonperiodicals VII

3. Titles and Abstracts of NBS Publications VIII

3.1. Journal of Rbsearch, Section A 1

3.2. Journal of Research, Section B 13

3.3. Journal of Research, Section C 20

3.4. Monographs 27

3.5. Handbooks 30

3.6. Miscellaneous Publications 31

3.7. Applied Mathematics Series 35

3.8. National Standard Reference Data Series 36

3.9. Building Science Series 38

3.10. Commercial Standards * 39

3.11. Simplified Practice Recommendations * 40

3.12. Product Standards 41

3.13. Technical Notes 42

4. Titles and Abstracts of Papers Published by Others, 1966-1967 54

5. Availability of NBS Publications 101

5.1. Price Lists 101

5.2. Reprints of Sources for NBS Papers in Periodicals 109

5.3 Out-of-print Material 110

6. Indexes 111

6.1. How to Use the Indexes 111

6.2 Author Index 113

6.3. Key-word Index 127

Appendix A. List of Depository Libraries in the United States 205

Appendix B. List of Field Offices of the U.S. Department of Commerce 213

Will become Product Standards when revised.

Ill
NBS PUBLICATIONS PROGRAM

For many years, the National Bureau of Standards formal publication program has provided

a principal and effective means of communicating the results of the Bureau's research, development, and service activities to the scientific and technical community. Publications thus constitute a major end product of the Bureau's efforts, totalling about 1200 items per year. These

take the form of the Bureau's four periodicals, its eight nonperiodical publications, and articles in the journals of professional organizations and technological associations.

This book, Publications of the National Bureau of Standards, lists those publications representing the results of the Bureau's in-house programs; the Clearinghouse publications and services are described below.

The Bureau currently publishes four periodicals and eight categories of nonperiodical publications, as listed below:

PERIODICALS

Journal of Research, published in three sections, which are available separately:

Physics and Chemistry

Mathematical Sciences (formerly Mathematics and Mathematical Physics)

Engineering and Instrumentation

Technical News Bulletin

NONPERIODICAL PUBLICATIONS

Monographs, Handbooks, Applied Mathematics Series, National Standard Reference Data Series,

Building Science Series, Special Publications (formerly Miscellaneous Publications), Technical

Notes, and Product Standards.

PAPERS PUBLISHED BY OTHERS

Many significant contributions by NBS authors are published in other journals. Up-to-date

listings of these articles are carried regularly in the Technical News Bulletin, as well as in

each section of the Journal of Research, along with selected abstracts.

CLEARINGHOUSE SERVICES

The Clearinghouse for Federal Scientific and Technical Information, operated by NBS, supplies unclassified information related to Government-generated science and technology in defense, space, atomic energy, and other national programs. For further information on Clearinghouse services, write: Clearinghouse, U.S. Department of Commerce, Springfield, Virginia

22151.

IV
1. GENERAL INFORMATION

1.1. PURCHASE PROCEDURES

The publications of the Bureau are available

from the Superintendent of Documents, U.S.

Government Printing Office, Washington, D. C,

20402, at the prices listed in this publication.

You may also order through the U.S. Department of Commerce Field Office nearest you (see

page 213 for list of Field Offices of the U.S.

Department of Commerce). Nonperiodicals

(only) may also be ordered through the Clearinghouse for Federal Scientific and Technical

Information, National Bureau of Standards,

U.S. Department of Commerce, Springfield,

Virginia, 22151.

See page 101 for price lists of available

publications, plus instructions on how to ac- quire reprints of articles by NBS authors,

and how to get out-of-print material.

How to Make Remittances. Remittances for

publications for which individual sales or subscription prices are shown should be mailed

to Superintendent of Documents, U.S. Government Printing Office, Washington, D. C, 20402,

by coupon, postal money order, express money

order, or check. Postage stamps will not be

accepted. Publications cannot be mailed before

remittances are received. Foreign remittances

should he made either by international money

order or draft on an American hank.

The letter symbol, publication number, and

full title of the publication must be given when

ordering. The Superintendent of Documents

allows a discount of 25 percent on orders of 100

or more copies of one publication.

For the convenience of the general public,

coupons in the denomination of five cents may

be purchased from the Superintendent of Documents. These may be exchanged for Government publications sold by the Superintendent's

office. Address order to Superintendent of

Documents, U.S. Government Printing Office,

Washington, D. C, 20402.

Persons who make frequent purchases from

the Superintendent of Documents may find a

deposit account convenient. Deposits of $25 or more are accepted against which orders may

be placed without making individual remittances or first obtaining quotations. Order

blanks are furnished for this purpose. After

the order has been processed, the order itself

is returned, showing the publications supplied,

explanations regarding those not sent, the

amount of charge, and the balance on deposit.

No charge is made for postage on documents

sent to points in United States and possessions, or to Canada, Mexico, Newfoundland (including

Labrador), and certain Central and South

American countries. To other countries the

regular rate of postage is charged, and remittances must cover such postage. In computing

foreign postage, add one-fourth of the price

of the publication.

This Special Publication of the National

Bureau of Standards lists the publications of the

Bureau issued between July 1, 1966 and December 31, 1967. It includes an abstract of each

NBS-issued publication ; abstracts of papers by

Bureau authors appearing in non-NBS journals

in 1966 and 1967 (plus some earlier papers

omitted from the supplement to Miscellaneous

Publication 240) ; key-word and author indexes; and general information and instructions about NBS publications.

Miscellaneous Publication 240 (covering the

period July 1, 1957 through June 30, 1960) and

its supplement (covering the period July 1,

1960 through June 30, 1966) remain in effect.

Two earlier lists, Circular 460 (Publications of

the National Bureau of Standards, 1901 to

June 1947) and its supplement (Supplementary

List of Publications of the National Bureau of

Standards, July 1, 1947 to June 30, 1957) are

also still in effect.

The catalogs of NBS publications are more

completely described in Section 1.3.

1.2. ANNOUNCEMENTS OF NBS PUBLICATIONS

The Bureau itself does not maintain a free

individual mailing list for announcing its new

publications. However, the Government agencies mentioned below regularly issue the following official announcements dealing whole or in

part with new NBS publications of interest in

the journals' respective fields.

Technical News Bulletin. Issued monthly by

the National Bureau of Standards. In addition

to publishing technical news of the Bureau,

the Bulletin announces all new publications by

members of the staff, including those appearing in other journals. Available from the

Superintendent of Documents, U.S. Government

Printing Office, Washington, D. C, 20402. Annual subscription, $3.00 ; $4.00 foreign. Single

copies, 15 cents each (see also Sections 2.2

and 2.3).

Monthly Catalog of United States Government Publications. Issued monthly by the Superintendent of Documents, U.S. Government

Printing Office, Washington, D.C., 20402. Annual subscription, with consolidated annual

index, $6.00; $7.50 foreign.

Price Lists. These consist of lists of publications prepared by the Superintendent of Documents on special subjects. Single copies sent on

request without charge provided you state the

subject matter field in which you desire information. For a complete List and order form for

subject price lists, request a copy of How to

Keep in Touch with United States Government

V
Publications from the Superintendent of Documents, U.S. Government Printing Office, Washington, D. C, 20402.

List of Selected Government Publications.

Issued semimonthly by the Superintendent of

Documents. Each list is arranged alphabetically

by subjects, with annotations and prices. May

be obtained free from that office.

Business Service Check List. Weekly an- nouncement of publications of the Department

of Commerce. Lists titles and prices of National

Bureau of Standards Publications, as well as those of other offices of the Department of

Commerce. Available from the Superintendent

of Documents for $2.50 a year domestic; $5.50

foreign.

1.3. CATALOGS OF NBS PUBLICATIONS

Previous catalogs, plus this publication, constitute a complete list of the titles of the

Bureau's publication through December 31,

1967, including brief abstracts of the material

published in the NBS publication series. This

publication also contains abstracts of papers

published recently in outside media. Where the

price is given, the catalog is available from the

Superintendent of Documents, U.S. Government Printing Office, Washington, D. C, 20402.

Otherwise, it may be consulted in a library

which maintains sets of National Bureau of

Standards publications.

Circular 24, 7th edition : Publications of the Bureau of Standards 1901 to 1925. 271 pages, in- cluding brief abstracts and subject index (*)

Circular 24 Supplement: Supplementary list of

publications of the Bureau of Standards, July

1, 1925, to December 31, 1931. 214 pages, including brief abstracts and subject index (*)

Circular 24 Supplement: Supplementary list of

publications of the National Bureau of Standards, January 1, 1932, to December 31, 1941.

386 pages, including brief abstracts. The subject and author indexes cover the period 1901

to December 31, 1941 (*)

Circular 460: Publications of the National Bureau of Standards 1901 to June 30, 1947. 375

pages, including subject and author indexes.

Brief abstracts are included for the period

January 1, 1941, to June 30, 1947 $1.25

* Out of print.

Supplement to Circular 460, Publications of the

National Bureau of Standards, July 1, 1947, to June 30, 1957. 373 pages, including subject

and author indexes $1.50

Miscellaneous Publication 240 : Publications of

the National Bureau of Standards July 1, 1957, to June 30, 1960. Includes Titles of

Papers Published in Outside Journals 1950 to 1959. 391 pages, including subject and author

indexes $2.25

Supplement to Miscellaneous Publication 240,

Publications of the National Bureau of Standards published by NBS, July 1960 through

June 1966; published by Others, 1960 through

1965. 740 pages, including subject and author

indexes $4.00

Special Publication 305, Publications of the National Bureau of Standards published by NBS,

July 1966 through December 1967 ; published

by others, 1966-1967. 213 pages including

subject and author indexes $2.00

1.4. DEPOSITORY LIBRARIES IN

THE UNITED STATES

The Superintendent of Documents, United

States Government Printing Office, is authorized by law to furnish Government publications

to designated depository libraries. The libraries

listed in Appendix A are now receiving selected

publication series of the National Bureau of

Standards for general reference use. Whether

a given library has a copy of a particular publication can be determined by inquiring at the

library.

1.5. FIELD OFFICES OF THE U.S. DEPARTMENT OF COMMERCE

Department of Commerce Field Offices are maintained in the cities listed in Appendix B.

Their purpose is to provide ready access, at the

local level, to the Department's reports, publications, statistical statements, surveys, as well as to the specialized and experienced staff in

charge. Each Field Office serves as an official

sales agent of the Superintendent of Documents, U.S. Government Printing Office, making available for purchase locally a wide range

of Government publications. The reference

library maintained by each Field Office contains

many Government and private publications,

periodicals, directories, reports, and other ref- erence materials.

2. DESCRIPTION OF NBS PERIODICALS AND

NONPERIODICALS

2.1. JOURNAL OF RESEARCH

The Journal of Research reports research

and development in physics, mathematics,

chemistry, and engineering. Comprehensive

scientific papers give complete details of the

work, including laboratory data, experimental

procedures, and theoretical and mathematical

analyses. The Journal also presents review

articles by recognized authorities and compilations of information on subjects closely related

to the Bureau's technical program. The Journal

of Research is issued in three separate sections as follows:

A. Physics and Chemistry

This section presents papers of interest primarily to scientists working in these fields. It covers a broad range of physical and chemiVI
cal research, with major emphasis on standards

of physical measurements, fundamental constants and properties of matter. Issued six

times a year.

Editor: C.W.Beckett

Associate Editor: D. D. Wagman

B. Mathematical Sciences

This section presents studies and compilations designed mainly for the mathematician

and theoretical physicist. Topics in mathematical statistics, theory of experiment design,

numerical analysis, theoretical physics and

chemistry, logical design and programming of

computers and computer systems are covered,

together with short numerical tables. Issued

quarterly.

Editor: M. Newman

Associate Editors: J. J. Sopka, F. W. Olver,

and J. R. Edmonds

C. Engineering and Instrumentation

This section reports results of interest chiefly

to the engineer and the applied scientist. It includes many of the new developments in

instrumentation resulting from the Bureau's

work in physical measurement, data processing,

and development of test methods. It also covers some of the work in acoustics, applied

mechanics, building research, and cryogenic

engineering. Issued quarterly.

Editor: M. Greenspan

Associate Editors: G. F. Montgomery, R. V.

Smith, and A. F. Schmidt

2.2. TECHNICAL NEWS BULLETIN

Reports results of Bureau's programs in

measurement standards and techniques, properties of matter and materials, engineering

standards and services, instrumentation, and

automatic data processing.

The best single source of information con- cerning the Bureau's research, developmental,

cooperative and publication activities, this

monthly publication is designed for the industry-oriented individual whose daily work involves intimate contact with science and technology—engineers, chemists, physicists, re- search managers, product-development managers, and company executives. Readers use the

TNB to learn of new developments with practical applications, to fill in background, to get

ideas for further investigations, and for information on NBS calibration services and

publications. Issued monthly.

2.3. PERIODICAL SUBSCRIPTION RATES

Periodical Domestic i Foreign

Journal of Research of the National Bureau of Standards:

Section A. Physics and Chemistry, issued six times a year,

paper covers (4) $6.00 $7.25

Bound volume (1 volume per

year), blue buckram (') (s)

Section B. Mathematics and

Mathematical Physics, issued

quarterly, paper covers 2.25 2.75

Bound volume (1 volume per

year) , green buckham ('^) (s)

Section C. Engineering- and In- strumentation, issued quarterly, paper covers 2.75 3.50

Bound volume (1 volume per

year), salmon buckram (4) __ {^) (s)

Technical News Bulletin, 12

monthly issues (4) 3.00 4.00

NOTE.—Send order, with remittance, to Superintendent of Document.s, U.S. Government Printing Office, Washington, D. C. 20402.

^ United States and its possessions, Canada, Mexico, Newfoundland (including Laborador), and certain Central and South

American countries.

- Foreign price includes the co.st of the publication and postage. Prices of the bound volumes vary. The Superintendent of Documents will furnish prices on request.

* These monthly periodicals may be obtained on a 1-, 2-, or 3-year

.subscription basis (although at no reduction in rates).

2.4. NONPERIODICALS

Eight categories of nonperiodical publications, as described below, are listed in this

catalog:

MONOGRAPHS—major contributions to the

technical literature on various subjects related

to the Bureau's scientific and technical activities.

HANDBOOKS—recommended codes of engineering and industrial practice (including

safety codes) developed in cooperation with

interested industries, professional organizations, and regulatory bodies.

MISCELLANEOUS PUBLICATIONS—This

series provides material of a particular nature

and quality. It includes proceedings of highlevel national and international conferences

sponsored by NBS, precision measurement and

calibration volumes, NBS Research Highlights,

and other special publications appropriate to

this grouping. This series has been redesignated Special Publications.

APPLIED MATHEMATICS SERIES—mathematical tables, manuals, and studies.

VII
NATIONAL STANDARD REFERENCE

DATA SERIES—provides quantitative data on

the physical and chemical properties of materials, compiled from the world's literature and

critically evaluated. Developed under a worldwide program coordinated by NBS.

BUILDING SCIENCE SERIES—research results, test methods, and performance criteria

of building materials, components, systems, and

structures.

TECHNICAL NOTES—designed to supplement the Bureau's regular publications program. Communications and reports of data of

limited or transitory interest. Often serve as

final reports on work sponsored at NBS by

other Government agencies.

PRODUCT STANDARDS—developed cooperatively with interested Government and industry

groups, and used voluntarily. The term

Product Standards is now being used to identify all new standards as well as all revisions

of existing standards. Existing standards will

continue to be referred to as Commercial

Standards or Simplified Practice Recommendations until such time as they are revised.

3. TITLES AND ABSTRACTS OF NBS PUBLICATIONS

The letter designations shown are used

to indicate the various NBS nonperiodical

publications. These letter designations should

be used, along with the series number and

title, when ordering or inquiring about NBS

nonperiodical publications.

Mono Monographs

H Handbooks

M Miscellaneous Publications * AMS Applied Mathematics Series

NSRDS National Standard Reference

Data Series

BSS Building Science Series

PS Product Standards

CS Commercial Standards ** SPR Simplified Practice

Recommendations ** TN Technical Notes

When ordering, or inquiring about, reprints

from the Journal of Research, you should not

* Redesignated "Special Publications" as of January 1968. Will became "Prf)duct Standards" when revised.

only use the J and A, B, or C (explained below)

,

but should also consult either the author or

the key-word index (as appropriate) and use

the volume, section, issue, paper, and page number which you find there. For example, if

you wish to order or inquire about "Electric

Fields Produced in Cubic Crystals by Point

Defects", by A. D. Franklin and D. J. Sparks,

you should use this designation: J 71 A 1-428,

1-2 (1967).

(For an explanation of the volume-sectionissue-paper-and-page number symbol, see table

B on page 112)

J, Journal of Research:

A. Physics and Chemistry

B. Mathematics and Mathematical Physics

C. Engineering and Instrumentation

Prices of publications are listed on page 101.

Other details about ordering, including information about reprints of material by NBS

authors and out-of-print material, are also

included in that section.

VIII
3.1. PAPERS FROM THE JOURNAL OF RESEARCH OF THE NATIONAL BUREAU

OF STANDARDS, SECTION A. PHYSICS AND CHEMISTRY,

VOLUME 70A, JULY-DECEMBER 1966

July-August 1966

Elastic constants of synthetic single crystal corundum, W. E. Tefft,

J. Res. NBS 70A4-403, pp. 277-280 (July- Aug. 1966).

Key words: Aluminum oxide; corundum; elastic constants; shear modulus; Young's modulus.

The elastic constants of synthetic single crystal corundum

(aluminum oxide) were calculated from 0 to 900 °K from data

obtained by a resonance technique from 80 to 900 °K.

Phase equilibria as related to crystal structure in the system

niobium pentoxide-tungsten trioxide, R. S. Roth and J. L. Waring, y. Res. yVB5 70A4-404, pp. 281-303 (July- Aug. 1966).

Key words: Crystal structure; niobium pentoxide; phase

equilibria; system; tungsten trioxide. The phase equilibrium diagram for the binary system niobium

pentoxide-tungsten trioxide has been constructed from results of

x-ray diffraction studies on both single crystals and powders and

from fusion characteristics. Twelve stable compounds have

been found in the system. The exact composition of eight of

these compounds has been established by single crystal analyses

at the Nb20.5:WO:, ratios of 6: 1 , 13:4. 7:3, 8:5, 9:8, 1:1, 4:9, and

2:7. The approximate compositions of the remaining four other

phases are 30:1, 6:11, 1:11, and 1:15. The 6: 1 , "6: 1 1", 4:9, and

2:7 phases melt congruently at 1476, 1378, 1380. and 1357 °C,

respectively. The "30:1", 7:3, 8:5, 9:8, "1:11", and "1:15"

phases melt incongruently at 1470, 1440, 1385, 1375, 1356, and

1358 °C, respectively; and the 13:4 and 1:1 phases decompose

before melting at 1435 and 1 1 15 °C, respectively. The 8:5, 9:8,

"6:11", 2:7, "1:11", and "1:15" compounds are shown on the phase diagram as having minimum temperatures of stability.

One metastable phase having a narrow range of composition

near the 3:8 ratio was also encountered. Although NbiO,,

apparently exhibits no solid solution, WOs was found to accept a maximum of three mole percent niobia in solid solution enabling

all the reported polymorphs of WO3 to be obtained at room

temperature.

Properties of aqueous mixtures of pure salts. Thermodynamics of

the ternary system: Water-calcium chloride-magnesium chloride

at 25 °C, R. A. Robinson and V. E. Bower, 7. Res. NBS 70A4-

405, pp. 305-3ll(July-Aug. 1966).

Key words: Isopiestic measurements; vapor pressure;

calcium chloride; mixed solutions; activity coefficients.

Isopiestic vapor pressure measurements have been made on

the system water-calcium chloride-magnesium chloride at 25 °C. Activity coefficients have been evaluated for each salt in the presence of the other in systems of constant total ionic strength.

The excess free energy of mixing has been calculated and

compared with the values for analogous systems.

Properties of aqueous mixtures of pure salts. Thermodynamics of

the ternary system: Water-sodium chloride-calcium chloride at 25 °C, R. A. Robinson and V. E. Bower, J. Res. NBS 70A4-

406, pp. 313-318 (July-Aug. 1966).

Key words: Calcium chloride; isopiestic measurements;

mixed salt solutions; sodium chloride; vapor pressure of

aqueous solutions.

Isopiestic vapor pressure measurements have been made to determine some thermodynamic properties of the system: water- sodium chloride-calcium chloride at 25 °C. Equations are derived for the activity coefficient of each salt in the presence of

the other when the total ionic strength is kept constant. The

limiting conditions in very dilute solutions are considered and

"trace" activity coefficients calculated. A comparison with

previous work is made. The excess free energy of mixing is calculated.

Use of the consistency check in the vector verification method, A. D. Mighell and R. A. Jacobson, J. Res. NBS 70A4-407, pp. 319-321 (July-Aug. 1966).

Key words: Crystal; structure; Patterson; vector; symmetry; consistency; frequency; superposition.

The consistency check is a type of frequency check in which

full use is made of the space group symmetry. It is designed for application to a symmetry map, to a tentative atom map, to the

results of superpositions, or to any pseudoelectron-density map.

Like the frequency check, its purpose is to aid in the analysis of one of the above maps by assigning a relative weight (relative

weight equals the number of other peaks that the given peak is consistent with) to the peaks in these maps. To determine the

relative weight, each peak in the map is compared with each of

the others to see if it is consistent. Two peaks are considered

consistent with each other, if and only if, the set of unique

vectors between the two is present in the Patterson map. The

method is equivalent to doing a full set of symmetry

superpositions at each peak in a symmetry map or a tentative atom map; counting the number of points in the resulting map;

and outputting this number at the initial peak position. No

assumptions other than that for space group symmetry are required to apply the consistency check to a symmetry map. The

resulting map, which has been calculated in a routine fashion

directly from the Patterson map, may then be conveniently used

as the starting point for the structure analysis of an unknown

compound.

Self-reversal in the spectral lines of uranium, D. D. Laun, J. Res. NBS 70A4-408, pp. 323-324 (July-Aug. 1966).

Key words: Uranium, spectrum; spectrum, uranium; self- reversal; uranium spectrum.

In 1946, spectrum analysis indicated that the outer-electron configuration of normal uranium atoms was 5fi6dns'-, with an

energy level designated 'L k representing the normal state. Now

that conclusion is experimentally verified by the observation of

self-reversed lines in uranium spectra emitted by a high-current

pulsed arc between metallic electrodes. Fifty-four reversed lines were observed; thirty-eight involve the normal state and sixteen

are distributed among four low metastable states of the same

configuration.

Oscillator strengths for ultraviolet lines of Fe i, C. H. Corliss and

B. Warner, J. Res. NBS 70A4-409, pp. 325-371 (July-Aug.

1966).

Key words: Atomic spectra; iron; oscillator strengths;

transition probability; ultraviolet lines of Fe i.

1
Relative intensities and oscillator strengths for 2000

ultraviolet lines of Fe i from several investigations between 2080

and 4150 A have been critically discussed and adjusted to a uniform absolute scale. New values for many lines not measured

heretofore are reported.

September-October 1966

Orientation of calcium molybdate (CaMo04) and other single

crystals having the scheelite structure, E. N. Farabaugh, H. S. Peiser. and J. B. Wachtman. Jr.. J. Res. NBS 70A5-410, pp. 379-384 (Sept.-Oct. 1966).

Key words: Calcium molybdate: crystal orientation; crystallographic groups: interplanar angles: physical

properties: scheelite structure; single crystal; x-ray backreflection.

Values of interplanar angles useful in distinguishing the [100]

from the [110] direction in CaMo04 are given to facilitate orientation by analysis of back-reflection Laue patterns. The

distinction between the [001] and [001] directions in the

scheelite structure is discussed and examples of physical

properties dependent upon this distinction are given. The [001]

direction is defined in terms of the crystal structure and a pro- cedure for identifying (001) using Laue patterns is described.

The same distinction applies to certain nonpolar directions of all crystals _belonging to the following nonenantiomorphou^ point

groups: 1, m, 2/m, mmm. 3, 3m, 3m. 4, 4/m, 4/mmm, 6, 6/m,

6/mmm, m3, and m3m.

Crystal structure of BaGe[Ge30a] and its relation to benitoite, C. Robbins. A. Perloff. and S. Block, J. Res. NBS 70A5-41 1 , pp. 385-391 (Sept.-Oct. 1966).

Key words: Barium tetragermanate: structure; benitoite;

crystal; x-ray.

BaGe[Ge.30<)] is trigonal space group P3 with lattice constants a= 1 1.61, c = 4.74 A, and Z=3. The structure was

established by three-dimensional Patterson and electron density

syntheses. Three-dimensional least-squares refinement resulted

in a final R value of 6.8 percent (observed data only).

The previously proposed structural relationship of this compound with benitoite, BaTiSi.iOH, has been confirmed. The

structure can be considered as composed of Ge-^O^ rings, in which the Ge is tetrahedrally coordinated, linked through

octahedrally coordinated Ge atoms to form a three-dimensional

Ge-O network. All Ge polyhedra are linked by corner sharing.

The Ba ions occupy positions in channels of the network.

A rotating cylinder method for measuring normal spectral

emittance of ceramic oxide specimens from 1200 to 1600 °K, H.

E. Clark and D. G. Moore. J. Res. NBS 70A5-412. pp. 393-

415 (Sept.-Oct. 1966).

Key words: Alumina; ceramic oxides: emittance: error sources: magnesia; measurement uncertainties: spectral

emittance; thermal radiation; thoria; zirconia.

Equipment was designed and constructed for measuring the

spectral emittance of polycrystalline ceramic oxide specimens in the wavelength region 1 to \5 /x and at temperatures of 1200,

1400. and 1600 °K. Specimens consisted of small hollow

cylinders that were rotated at 100 rpm in a furnace cavity

equipped with a water-cooled viewing port. Emittances were

determined by comparing the radiance of the specimen to that of

a blackbody at the same temperature.

A series of six measurements (two measurements each on

three specimens) was made on commercially pure specimens of

alumina, thoria, magnesia, and zirconia. All four materials

showed similar behavior in that the emittances were low in the

shorter wavelength regions and high at the longer wavelengths.

The temperature coefficients of spectral emittance were positive

for all four materials, but varied with the material; those for thoria were appreciably higher than the other three. In all cases

coefficients were greater at short wavelengths than at long.

Error sources were investigated, and the measurement

uncertainties associated with each source were evaluated. It was

concluded that at 1200 °K the true values of emittance at 2 /xfor the particular specimens measured might be as much as 0.032

lower or 0.012 higher than the reported values. The data were in good agreement with reflectance measurements of the same

material and with recently reported absorption coefficients.

Electron absorption spectrum of cobalt(ii)-doped

trisphenanthrolinezinc nitrate dihydrate, C.W. Reimann,

J. Res. NBS 70A5-413, pp. 417-419 (Sept.-Oct. 1966).

Key words: Trisphenanthroline cobalt(ii) nitrate dihydrate;

trisphenanthrolinezinc nitrate dihydrate; electron absorption spectrum.

The electron absorption spectrum of cobalt(ii)-doped

trisphenanthrolinezinc nitrate dihydrate has been observed at room temperature and at 77 °K. Broad bands appear at 10,750

and 22,000 cm-' which are assigned to the ^Tij,(F) < > ^T29(F)

and the ^Tij(F) <—* ""Tl/P) transitions respectively. A broad

weak band occurs near 19,000 cm ' but at 77 °K this band

is resolved into a series of narrower bands. These bands are assigned to -G transitions. The relationship between the spectrum of cobalt(ii) trisphenanthrolinezinc nitrate dihydrate

and the solution spectra of cobalt(ii) in ammonia and ethylenediamine is discussed.

Procedures for homogeneous anionic polymerization, L. J. Fetters,

J. Res. NBS 70A5-414, pp. 421-433 (Sept.-Oct. 1966).

Key words: Homogeneous anionic polymerization;

monodisperse, polystyrene, poly-a-methylstyrene; polyisoprene; and polybutadiene.

This report is a review of the procedures and equipment used

in the preparation of polymers of predictable molecular weights

and narrow molecular weight distributions. The monomers

considered in detail are sytrene, a-methylstyrene, isoprene, and

butadiene.

The configurations 4d"+4d"''^ 5s in doubly-ionized atoms of the palladium group, Y. Shadmi.y. Res. NBS 7CA5-415, pp. 435-

445 (Sept.-Oct. 1966).

Key words: Configurations 4d"+4d"-^ 5s. energy levels: interaction parameters; palladium group; theoretical; third spectra.

Four hundred and eighty-three energy levels belonging to the low even configurations of the third spectra of the palladium

group are predicted by the use of interpolation formulas for the

interaction parameters.

November-December 1966

Absolute isotopic abundance ratios and atomic weight of magnesium, E. J. Catanzaro. T. J. Murphy, E. L. Gamer, and

W. R. Shields, J. Res. NBS 70A6-416, pp. 453-458 (Nov.- Dec. 1966).

Key words: Absolute ratios; atomic weight; isotopic

abundances: magnesium.

Absolute values have been obtained for the isotopic

abundance ratios of magnesium, using surface emission mass

spectrometry. Samples of known isotopic composition, prepared

from nearly pure separated magnesium isotopes, were used to

calibrate the mass spectrometers. The resulting absolute values

2
are -5Mg/--'Mg= 0. 12663 ±0.00013 and 2«Mg/--'Mg= 0. 1 3932

±0.00026. yielding an atomic weight ('-C= 12) of 24.30497

±0.00044. The indicated uncertainties are overall limits of

error based on 95 percent confidence limits for the mean and

allowances for effects of known sources of possible systematic

error.

Mass spectrometric study of photoionization, V. Water and

ammonia, V. H. Dibeler, J. A. Walker, and H. M. Rosenstock.

J. Res. NBS 70A6-417. pp. 459-463 (Nov.-Dec. 1966).

Key words: Autoionization; electronic; excited states; H2O+: NH3+; NH.+ ; OH+ ions- heats of formation;

ionization thresholds; mass spectrometer; photoionization;

radicals; Rydberg levels; vacuum monochromators.

Photoionization efficiency curves are obtained for the molecule and fragment ions of H2O and NHn in the wavelength

region extending from onset of ionization to 600 A. Threshold

values of 12.593eV and 10. 162eV are observed for the H20^

and NH3+ ions, respectively. Vibrationally excited states of the molecule ions and autoionization of Rydberg levels are observed. A determination of the bond angle of the H >0+ ion

from the Franck-Condon factors of the bending overtones

results in a value of 112 degrees. Threshold values of the fragment ions permit calculations of heats of formation of the OH+ and NH2+ ions and result in the ionization energies,

I(OH)=12.94eV and 1{NH.)=1 1 .22eV.

Interpretation of the third spectrum of gold (Au iii), L. Iglesias.V. Res. NBS 70A6-41 8, pp. 465-466 (Nov.-Dec. 1966).

Key words: Corrections to analysis of Au iii; gold;

spectrum of Au iii; third spectrum.

A revision of the analysis of the Au in spectrum is presented.

Of 9 energy levels considered doubtful on the basis of a recent

theoretical treatment, 6 are found to be real and 3 have been

rejected as incorrect. Three new energy levels have also been

found in agreement with theoretical predictions.

A formal solution for slit corrections in small-angle x-ray

scattering, J. Mazur and A. M. Wims.y. Res. NBS 70A6-419,

pp. 467-471 (Nov.-Dec. 1966).

Key words: Distribution of intensity; integral equation;

scattering cross section; slit correction; small-angle x-ray

scattering.

Slit shaped apertures are usually used in small-angle x-ray

scattering measurements in order to obtain easily measured

intensities of scattered radiation. As a result, the scattering

intensity at a given angle determined by the camera, the center of

the sample, and the central incident x-ray beam is not simply

related to the scattering from the sample only at that angle. The

experimentally determined intensities l(x) are related to the true

scattering intensities by the following integral equation:

hx) =

I'

l[{.x' + f'yi-'WU)dl.

This integral equation has been previously solved only for certain simplified functional forms for W(t) and l{x). In this paper, a formal procedure is developed for calculating /(x) from

the observed angular measurements, which does not necessitate

making any a priori assumption about the form of iV(t) and l(x).

High-temperature reactions of hexafluorobenzene, J. M.

Antonucci and L. A. Wall, J. Res. NBS 70A6-420, pp. 473-

480 (Nov.-Dec. 1966).

Key words: Direct replacement; high temperature;

mechanisms; nonionic or ionic coreactants; nuclear

fluorine: pentafluorohalobenzenes.

The direct replacement of aromatic fluorine in hexafluorobenzene has hitherto been possible only by the use of

nucleophilic reagents. In this investigation, the replacement of

nuclear fluorine by nonnucleophilic, or weakly nucleophilic,

reagents was achieved by reaction at relatively high

temperatures, 300 to 850 °C. For example, the reaction of

hexafluorobenzene with such reagents as bromine, chlorine, and

tetrafluoroethylene gave as major products bromopentafluorobenezene, chloropentafluorobenzene, and octafluorotoluene. In

addition, pentafluorohalobenzenes can also be produced by

passage of hexafluorobenzene over the appropriate alkali or

alkaline earth-metal halides at elevated temperatures.

The mechanism of the pyrolytic reactions of

hexafluorobenzene and the nonionic coreactants are considered

to involve free-radical intermediates. The reaction of

hexafluorobenzene with the ionic coreactants may proceed by an

ionic mechanism similar to that advanced for the usual, relatively

low temperature, nucleophilic substitution reactions of aromatic

systems. However, a more complicated free radical-ionic process cannot be ruled out for these reactions.

The melting temperatures of the «-paraffins and the convergence temperature for polyethylene, M. G. Broadhurst, 7. Res. NBS

70A6-42 1 , pp. 48 1 -486 (Nov.-Dec. 1 966).

Key words: Convergence temperature; melting

temperatures; methyl surfaces; //-paraffins; polyethylene;

thermodynamic properties.

The extrapolation of the melting points, T,,,, of the ^-paraffins

to large chain lengths («-^ ^) is reexamined in order to resolve

the differences in the proposed values of the convergence

temperature 70= lim T,,,. Experimental liquid entropies can be

made consistent with a term, R In n, proposed by Flory and Vrij.

This term effectively replaces the well-known expression

T,n= To(n + a)l(n + b) with an expression T,„ = T,i{n + a)l(n + \n

n+b)\ thus, slowing the convergence rate and increasing To from

141.1 °C to 144.7 °C. Independent estimates of the parameters

in the melting relationship were obtained from thermodynamic

data and the least squares estimate of 7(i=144.7 °C (calculated

from 33 melting points with a standard deviation of r,„=0.3 °C)

could not be altered by more than ±0.5 °C by any reasonable

variation of the parameters. A simplified melting expression is obtained for polyethylene which includes both the chain end and

fold surface energies, and it is shown that chain end effects partly account for the discrepancy between the 144.7 °C convergence

temperature and experimental melting temperatures (—139 °C)

of extended chain polyethylene crystals.

General treatment of the thermogravimetry of polymers, J. H. Flynn and L. A. Wall, J. Res. NBS 70A6-422, pp. 487-523

(Nov.-Dec. 1966).

Key words: Degradation; nonisothermal kinetics; polymers;

pyrolysis; thermal decomposition; thermogravimetry;

thermolysis; stability of polymers.

Theoretical equations are developed for typical

decompositions of polymers including those in which the

volatilization does not follow a simple "reaction order" and

those made up of a composite of several reactions of differing

energies of activation. The effects of order, activation energy,

heating rate and temperature dependence upon the calculated thermograms is illustrated. The literature on thermogravimetric

kinetics is critically reviewed and coalesced into a logical and

coherent development stressing the interrelation of methods and

employing a consistent system of notation. As a result, a number

of improved methods and new methods for the analysis of kinetic data applicable to the complex systems mentioned above are developed. It is concluded that methods involving a variable rate of heating or involving several thermogravimetric traces at

3
different rates of heating are capable of establishing the uniqueness of kinetic parameters. A new method of determining

initial parameters from rate-conversion data is developed. A

novel concept is employed of programming reaction variables (in this case, the heating rate) in a manner which greatly simplifies the mathematics of the kinetic system and which shows promise

of a wide range of applicability in the area of rate processes.

Viscoelastic behavior under large deformations, L. J. Zapas, J. Res. NBS 70A6-423, pp. 525-532 (Nov.-Dec. 1966).

Key words: BKZ theory: constant rate of strain; creep:

elastic fluid: nonlinear behavior: polyisobutylene: recovery:

stress; relaxation. The BKZ elastic fluid theory is used to correlate experimental

results obtained in biaxial strain and steady simple shear. With a

heuristic potential function involving three material properties, excellent agreement is obtained between theory and experiment.

In the special case where one of the material properties is dominant, the behavior in steady simple shear is calculated from

dynamic measurements in the infinitesimal range and is compared with actual data.

Statistical aspects of second and third law heats, W. S. Horton, J. Res. NBS 70A6-424. pp. 533-539. (Nov.-Dec. 1966).

Key words: Bias of least squares estimators; coefficient of

variation: correlated estimators: enthalpy adjustments; heat of vaporization: high temperature chemistry: overestimation

of standard deviation: second law heat: slope estimators;

third law heat: vapor pressure. The effects of random errors and of nonconstant heat of

vaporization upon the estimation of the second and third law

heats of vaporization are examined. The most important

conclusion is that the often noticed marked improvement in precision of the third law heat over that for the second law heat is real and is a natural consequence of the difference between the two estimators. The effects of systematic errors upon the two

heats are not investigated here. Other results of interest, but of

less importance because of the small magnitude of the effects, include: (1) the two heats are negatively correlated. (2) the second law heat is generally biased, (3) the third law heat is not

the minimum variance unbiased estimator of the heat of

vaporization, and (4) the standard deviation obtained from least squares fitting consistently overestimates the true standard

deviation, but by a negligible amount. Any reversible process for which the equilibrium constant is treated by a similar procedure

is governed by the same considerations. The results apply

approximately at any temperature although the stimulus for these considerations comes from high temperature chemistry.

Density-temperature formulae for coexisting liquid and vapor and

for freezing liquid parahydrogen, R. D. Goodwin, 7. Res. NBS

70A6-425, pp. 541-544 (Nov.-Dec. 1966).

Key words; Coexistence densities: freezing liquid densities: hydrogen: melting-line liquid densities; orthobaric densities: parahydrogen; vapor-liquid equilibrium.

A single formula is given for coexistence temperature as a continuous function of the vapor-liquid densities. With six coefficients and seven adjusted exponents, it may conveniently

replace the several formulae formerly used in separate regions

of the data. Freezing liquid densities are described by a simple

power law in temperature, replacing more complicated formulae.

Computed results are tabulated and compared with the derived

data.

Solubility of CaHPOj-lHjO and formation of ion pairs in the system Ca(OH),-H3PO^ H,0 at 37.5 °C, E. C. Moreno. T. M.

Gregory and W. E. Brown, J. Res. NBS 70A6-426, pp. 545-

552 (Nov.-Dec. 1966).'

Key words: Solubility of calcium monohydrogen phosphate

dihydrate at 37.5 °C: calcium-phosphate ion-pairs; solubility

of dicalcium phosphate dihydrate; solubility of dibasic

calcium phosphate dihydrate.

The solubility isotherm for CaHP04-2H20 (DCPD) in the three-component system Ca(OH)2-H3P04-H20 was determined

in the pH range 3.5 to 6.8 by leaching a thermostated column of

DCPD with dilute phosphoric acid solutions. In confirmatory

experiments, equilibrium was approached both from super- and

under-saturation by shaking DCPD with appropriate solutions. The calculated ionic acfivity product (Ca^^) x (HP04=),

appeared to be a parabolic function of pH with a minimum near pH 5.0. The pH dependence of the ionic product could be

accounted for by considering the ion pairs [CaHP04]° and

[CaHoPOj]* as semi-empirical parameters. Under the condition

of saturadon with respect to DCPD, the acfivity of the pair

[CaHP04]° must be a constant. The activity of the species

[CaH.PO,]- was shown to vary directly with hydrogen ion

activity. The activities of the two ion pairs were adjusted to give

a set of pH-independent ionic acfivity products with a mean of

2.19±0.1 IxlO-^. The stability constants for [CaHP04]° and

[CaH2P04]+ are 5.88 + 0.031 x 102 and 7.49 ±0.039, respectively. Experiments were conducted to study the hydrolysis

of DCPD to more basic calcium phosphates and the kinetics of these transformations is discussed. The significance of the

ion pairs in human serum is considered.

Dissociation of some substituted phenols in 50-percent aqueous

methanol as solvent, R. A. Robinson and R. G. Bates, J. Res. NBS 70A6-427, pp. 553-556 (Nov.-Dec. 1966).

Key words: Dissociation constant; methanol-water

mixtures; solvent effects; substituted phenols.

The dissociation constants of the following substituted

phenols in 50 wt percent methanol have been measured at 25 °C: o-nitrophenol. p-nitrophenol, 4-methyl-2-nitrophenol, 2, 6- dichlorophenol, pentachlorophenol. The respective values

found, expressed as pK values, are 7.91 -. 7.69^, 8.284. 7. 680, and

5.27k. The dissociation constants of 4-methyl-2-nitrophenol and

pentachlorophenol, again expressed as pK values, have been

measured in water as solvent at 25 °C and found to be 7.597 and

4.82(1. respectively.

4
PAPERS FROM THE JOURNAL OF RESEARCH OF THE NATIONAL BUREAU

OF STANDARDS, SECTION A. PHYSICS AND CHEMISTRY,

VOLUME 71A, JANUARY-DECEMBER 1967

January-February 1967

Electric flelds produced in cubic crystals by point defects, A. D.

Franklin and D. J. Sparks, J. Res. NBS 71A1-428, pp. 1-2 (Jan.-Feb. 1967).

Key words: Electric fields; ionic crystals; lattice sums; point

defects; polarization; NaCl; CsCl; CaF^; ZnS.

Charged point defects in crystals polarize the surrounding

ions. These induced dipoles contribute to the electric field in the

crystal. In this paper, lattice sums for the calculation of this contribution are given for the NaCl, CsCl, CaF2, and ZnS

structures. Various positions for the defect are chosen, and the

field evaluated near lattice sites in the vicinity of the defect, with

radial (with respect to the defect) displacements of ±20 percent

of the cation-anion distance allowed away from each lattice site. The lattice sums are expressed in power series, including terms up to cubic in the displacements, and the coefficients tabulated.

Heat capacity and tliermodynamic properties of beryllium 1:3- aluminate, BeO SAloO,, from 15 to 390 °K, G. T. Furukawa

and W. G. Saba, J. Res. NBS 71A1-429, pp.3-8 (Jan.-Feb.

1967).

Key words: Beryllium 1 :3-aluminate; enthalpy; entropy;

Gibbs energy; heat capacity; low temperature calorimetry;

thermodynamic properties.

The heat capacity of beryllium 1 :3-aluminate, BeO- 3A120,-!, was determined from 15 to 380 °K and the thermodynamic

properties calculated from 0 to 390 °K. The entropy at 298.15

°K was found to be 1 75.55 J deg ' mol ' (41 .96 cal deg ' mol ').

Dissociation constant of m-nitrophenol in 50 wt percent methanol- water solvent from 25 to 40 °C and related medium effects, B. J. Steel, R. A. Robinson, and R. G. Bates. 7. Res. NBS 71A1-

430, pp. 9-12 (Jan.-Feb. 1967).

Key words: Dissociation; electrolytes; methanol; mnitrophenol; nonaqueous solvents; phenols; thermodynamics.

The dissociation constant of w-nitrophenol in 50 wt percent

methanol-water as solvent has been determined at 25, 30, 35,

and 40 °C. A spectrophotometric method was used, together

with acidity functions for buffer solutions in 50 percent methanol

derived from previous emf measurements. Values of the enthalpy and entropy changes on dissociation of the phenol have

been calculated. A comparison with corresponding values for the dissociation of w-nitrophenol in aqueous solution affords a measure of the medium effects. The medium effect for mnitrophenol lies intermediate between that for o-nitrophenol and

that for p-nitrophenol.

On the calculation of moments of molecular weight distribution from sedimentation equilibrium data, I. H. Billick, M. Schultz,

andG. H. "^eiss, J. Res. 71A1-43 1 , pp. 13-17 (Jan.-Feb.

1967).

Key words; Molecular weight average; molecular weight

distributions; moments; polydispersity; polynomial

representation; sedimentation equilibrium.

In this paper we discuss a technique for calculating moments

of polydisperse materials in terms of concentration readings

along the cell. The proposed method minimizes dependence on

data from the end points where they may be unreliable. An

analysis is given of the errors involved in the use of the proposed

method when the underlying molecular weight distribution is the Schulz distribution or the lognormal.

The far infrared spectrum of vulcanized natural rubber, J. E. Stewart and F. J. Linnig, J. Res. NBS 71A1-432, pp. 19-23

(Jan.-Feb. 1967).

Key words: Accelerators; far infrared; natural rubber;

sulfur; tetramethylthiuram disulfide; vulcanization; zinc dibutyldithiocarbamate; zinc dimethyldithiocarbamate.

Earlier studies of the infrared spectra of rubber and some vul- canizates of rubber have been extended into the 650 to 33 cm~'

far infrared region. Some of the absorption bands originating in the crystalline portion of unvulcanized rubber have been studied

by using polarized radiation and samples oriented by stretching.

Vulcanization of rubber with sulfur alone produces a general

weakening of all absorption bands and no new absorptions.

Vulcanization with sulfur and an accelerator also results in a

reduction in intensity of the rubber absorptions, but is accompanied by the appearance of new bands. When the accelerator is tetramethylthiuram disulfide (TMTD) the new

bands are probably indicative of a thiocarbamate structure. When zinc dibutyldithiocarbamate is used as an accelerator a band probably due to zinc sulfide occurs. Vulcanization with

TMTD alone produces only slight changes in the far infrared spectrum. However, when TMTD is used in the presence of

zinc oxide a reaction occurs in which zinc dimethyldithiocarbamate (ZnDMDC) is formed. After vulcanization for a short period of time strong TMTD bands remain, but after long

vulcanization the TMTD bands are replaced by ZnDMDC

bands.

Irradiation of dextran and its aqueous solutions with cobalt-60 gamma rays, J. H. Flynn, L. A. Wall, and W. L. Morrow, 7. Res. NBS 71A1-433, pp. 25-3 1 (Jan.-Feb. 1967).

Key words: Aqueous solution; cross-linking; dextran;

dextran triacetate; gamma irradiation; polymer degradation;

posfirradiative decay.

Cross-linking predominates over chain scission during the

irradiation of concentrated aqueous dextran solutions by cobalt- 60 gamma rays in the absence of oxygen. An extensive and longlived postirradiative viscosity decay, which has not been

previously reported, is attributed to the agency of hydrogen

peroxide formed during the radiolysis of water. Solid dextran

primarily degrades upon y-irradiation while dextran triacetate is borderline between dominant scission and cross-linking. Both

exhibit a postirradiative viscosity decrease when irradiated in the presence of water vapor. Electron spin resonance spectra of

dextran in the solid state and in aqueous solution are presented

and compared. Spin resonance spectral and chemical evidence

concerning the mechanism of cross-linking and postirradiative

decay reactions is presented. There is conflicting evidence for the presence of oxyradicals. Speculafions are made concerning

possible mechanisms of oxyradical formation and their role in the production of ether and peroxy linkages.

5
Synthesis of poly-p-oxyperfluorobenzylene and related polymers.

A novel synthesis of the monomer 2,3iS,6-tetrafluoro-4-trifluoromethylphenol, J. M. Antonucci and L. A. Wall, 7. Res. /VB5 71A1-434, pp. 33-41 (Jan.-Feb. 1967).

Key words: l-?-butoxy-2,3,5,6-tetrafluoro-4-trifluoromethylbenzene; perfluoro-p-quinonemethide; polymerization; poly-p-oxyperfluorobenzylene; pyrolysis; 2,3,5,6-

tetrafluoro-4-trifluoromethylphenol.

The synthesis and polymerization of 2,3,5,6-tetrafluoro-4-

trifluoromethylphenol (heptafluoro-p-cresol) is described. The

polymer, poly-p-oxyperfluorobenzylene (polyperfluoro-pbenzylene oxide), is probably formed through the perfluoro-pquinonemethide intermediate obtained by the intramolecular

loss of either hydrogen fluoride or a metal fluoride. The polymer

has a structure analogous to that reported for the polymer

derived from p-trifluoromethylphenol under similar conditions.

In the course of the synthesis of the monomer, heptafluoro-pcresol, a novel synthetic method was discovered. The synthesis

consists in the prior preparation of l-?-butoxy-2.3,5,6-

tetrafluoro-4-trifluoromethylbenzene and its subsequent thermal

decomposition into the isobutylene and the desired cresol. Similarly, A'-/-butyl-2,3,5,6-tetrafluoro-4-trifluoromethylaniline

undergoes a similar liquid phase pyrolysis into isobutylene and

2,3,5,6,-tetrafluoro-4-trifluoromethylaniline. However, during

the course of this pyrolysis, practically all of the aniline undergoes polymerization with concomitant loss of hydrogen

fluoride. The polymer is formed by the same mechanism

operative in the thermal polymerization of p-heptafluorocresol

except that additional quantities of hydrogen fluoride can be

eliminated from the -NHCF>- segments of the polymer chain

thereby introducing -N=CF- units into the polymer backbone.

Other /-butyl derivatives were synthesized and their thermal

decomposition studied. Several possible mechanisms for the decomposition of these /-butyl compounds are considered.

Preparation, purity, and homogeneity of NBS standard samples

705 and 706, polystyrene, D. Mclntyre. J. Res. NBS 71A1-

435,pp. 43-47 (Jan.-Feb. 1967).

Key words: Ash content; elemental analysis; homogeneity;

lithium content; molecular weights; polymer; preparation;

purity; sampling; standard sample; volatile content. The state-of-art in the measurement of the molecular weights

of macromolecules is discussed. The preparation of polystyrene

standard samples 705 and 706 is described. The results and the description of the carbon-hydrogen microanalysis, the ash

determination, the lithium analysis, and the volatiles determination are given. The sampling methods for determining

the homogeneity of 705 and 706 are presented. Some evidence

of heterogeneity appeared to be present, particularly for lot 705,

but the experiment did not provide conclusive evidence of

heterogeneity of the material.

Large-scale, preparative paper chromatography, H. L. Frush,y.

Res. NBS 71A1-436, pp. 49-52 (Jan.-Feb. 1967).

Key words: Chromatography on seed-test paper; large-scale

paper chromatography; radioactive carbohydrates; use of

heavy papers in preparative chromatography.

Simplified techniques are described for the use of heavy

papers in large-scale, preparative chromatography. A new

technique is illustrated for nondestructively locating bands of

compounds on wet chromatograms. Capacities and behavior

characteristics of Whatman seed-test paper and Whatman No.

1 7 paper are illustrated.

Infrared absorption spectra of some aldofuranoid, aldopyranoid,

and acyclic 1-acylamido derivatives of sugars, R. S. Tipson, A.

S. Cerezo, V. Deulofeu, and A. Cohen, 7. Res. NBS 71A1-

437, pp. 53-79 (Jan.-Feb. 1967).

Key words: Absorption spectra; acyclic sugars; 1- acylamido sugars; aldofuranoid sugars; aldopyranoid

sugars; infrared spectra.

The infrared absorption spectra of two glycofuranosylacetamides and their perbenzoates, and of eleven glycopyranosylacylamides and eight esters thereof, are presented and dis- cussed. For comparison, the spectra of thirteen 1 ,l-bis(acylamido)- 1 -deoxyalditols and eight esters thereof are also given and

discussed.

The useful correlations between structure and infrared absorption made by Barker and co-workers for certain carbohydrates, and by Nanasi and co-workers for some Narylglycosylamines, cannot be extended to the 1-acylamido

compounds we have studied. Certain of Verstraeten's

correlations may have some diagnostic value.

March-April 1967

Relative enthalpy of beryllium l:l-aluminate, BeO-Al20.',, from

273 to 1173 °K. Thermodynamic properties from 273 to 2150 °K, D. A. Ditmars and T. B. Douglas, 7. Res. NBS 71A2-438,pp.

89-95 (Mar.-Apr. 1967).

Key words: Beryllium aluminate; chrysoberyl; drop

calorimetry; enthalpy measurements; high-temperature

calorimetry; mixed oxides; specific heat; thermodynamic

properties.

The relative enthalpy of the beryllium aluminate BeO-Al203 was measured by "drop" calorimetry from 273 to 1 173 °K. The

thermodynamic properties were calculated up to 2150 °K

(approximately the melting point). For this calculation, the data were extrapolated above 1173 °K and the entropy at 273 °K,

previously determined at the NBS, was used.

Relative enthalpy of beryllium l:3-aluminate, BeO 3AI2O3, from

273 to 1173 °K. Thermodynamic properties from 273 to 2150 °K, D. A. Ditmars and T. B. Douglas, J. Res. NBS 71A2-439,pp.

97-103 (Mar.-Apr. 1967).

Key words: Beryllium aluminate (1:3); drop calorimetry;

enthalpy measurements; high-temperature calorimetry;

mixed oxides; specific heat; thermodynamic properties.

The relative enthalpy of beryllium 1 :3-aluminate,

BeO-3AL,0,i, was measured from 273 to 1173 °K. Thermodynamic properties were calculated up to 2150 °K (near

the melting point) by extrapolating the present measurements

and making them consistent with existing low-temperature data.

The heats of combustion of polytetrafluoroethylene (Teflon) and

graphite in elemental fluorine, E. S. Domalski and G. T. Armstrong, J. Res. NBS 71A2-440, pp. 105-118 (Mar.-Apr.

1967).

Key words: Aluminum fluoride; carbon tetrafluoride; fluorine; fluorine bomb calorimetry; graphite; heat of

combustion; heat of formation; hydrogen fluoride aqueous;

Teflon.

Bomb calorimetric measurements are reported for the combustion in fluorine of polytetrafluoroethylene (Teflon) and

graphite-polytetrafluoroethylene mixtures. Mass spectrometric

examination of the product gases showed CF4 to be the only

major product with C2FB(g) present in only very small amounts. The completeness of combustion of the graphite was determined

by chemical analysis of combustion residues and found to range from 97 to better than 99 percent. From the combustion data, the heats of formation A// °j29s[CF4{.g)] and AH °/2!)8[C2F4 (solid

6
polymer)] were determined to be -222.87 ±0.38 kcal mol-' and

-197.82 ±0.39 kcal (gfw C2F4)-', respectively. The uncertainties are estimates of the overall experimental errors. A previously reported value for the heat of formation of

AlFalc) is adjusted to be consistent with the present work. An

evaluation of other data on CF4 is presented. The heat of

formation of CF4(g) is combined with other work to derive the heats of formation of HF solutions at three specific

concentrations.

Phase relations in the systems Ti02-Ir02 and Sn02-Ir02 in air, C.

L. McDaniel and S. J. Schneider, J. Res. NBS 71A2-441 , pp. 119-123 (Mar.-Apr. 1967).

Key words: Dissociation; phase relations; Sn02-Ir02

system; solid solution; Ti02-Ir02 system.

The pseudobinary systems Ti02-lr02 and Sn02-Ir02 were

studied by x-ray diffraction after treatment at various

temperatures in air. Their equilibrium phase diagrams were

similar, with no intermediate phases detected in either system.

Maximum solid solution of Ti02 occurs with the addition of

about 5 mole percent lr02 at 1040 °C. Solid solution of Ti02 in Ir02 extends to a maximum of about 12 mole percent Ti02 at 1040 °C, the dissociation temperature. Limited solid solubility

of Sn02 in Ir02 exists up to 3 mole percent Sn02 at the dissociation temperature, 1025 °C. Solid solution in Sn02 was

not detected at temperatures up to 1400 °C.

Sample purity and the N.Q.R. of Cl^^ in KCIO, at 0 °C, D. B. Utton.y. /?e5. /VB5 71A2-442,pp. 125-126 (Mar.-Apr. 1967).

Key words: Measurements at 0 °C; nuclear quadrupole resonance thermometry; potassium chlorate.

It is shown that careful preparation is necessary to achieve a

consistent value for the CP-^ nuclear quadrupole resonance

frequency in KCIO3 samples at 273.16 °K (the triple point of

water). This is illustrated by measurements on a number of

samples. It is suggested that the N. Q. R. frequency of CP'' in KClOi! at 273.16 °K and atmospheric pressure is 28,21 3,372±2Hz. This value is compared with measurements

made by previous workers which show a considerable spread.

Techniques for the growth of large single crystals of potassium of high purity, H. J. Foster and P. H. E. Meijer, J. Res. NBS

71A2-443,pp. 127- 132 (Mar.-Apr. 1967).

Key words: Crystal growth; fermi surface; orientation; potassium; spark cutting; zone refining.

The preparation of large, high purity, single crystals of

potassium is described. First, high initial purity is obtained by

careful zone refining. Then, a modification of the Bridgman

technique is applied which leads to crystals with resistivity ratios up to 6800 at 4.2 °K. The modification consisted of a heat shield as described in the test. We concluded from the magnetoacoustic experiments that were subsequently done with

these samples, that the samples had mean free paths of the order

of 10-2 cm. Typical crystals were 7/8 in diam and about 8 in long,

with growth direction along [110]. A description is given of an

easy method of orientation as well as the use of a spark erosion

technique to cut and polish the surfaces.

Synthesis of a-L-fucose-l-'* C (6-deoxy-L-galactose-l-'^C), H. S. Isbell, H. L. Frush, and N. B. Holt, 7. Res. NBS 71A2-444,

pp. 133-136 (Mar.-Apr. 1967).

Key words: Carbon- 14-labeled L-fucose; L-fuconic acid-/-

'"C; L-fucose-/-'^C; radioactive carbohydrates; synthesis of

radioactive sugars.

a-L-Fucose-/-'''C was synthesized in a radiochemical yield of

30 percent. The synthesis involved degradafion of

nonradioactive L-fuconic acid to 5-deoxy-L-lyxose and synthesis

from this of a-L-fucose-/-'^C by use of '^C-labeled cyanide in the cyanohydrin reaction. The resulting epimeric, '^C-labeled aldonic acids were separated as either the barium or the sodium

salts. Both salts of L-fuconic acid crystallize more readily than

corresponding salts of the epimeric 6-deoxy-L-talonic acid. The preparation of barium L-fuconate by the electrolytic

oxidation of L-fucose in the presence of barium carbonate and

barium bromide is described.

Deuterium isotope effects in a-fi pyranose and in pyranosefuranose interconversions, H. S. Isbell and C. W. R. Wade, 7.

«<?i. A'fi5 71A2-445.pp. 137-148 (Mar.-Apr. 1967).

Key words: Acid-base catalysis in D2O; deuterium isotope

effects; D-fructose; D-glucose; isotope effects; mechanism

of mutarotation; mutarotation; pyranose-furanose

interconversions; sugars in solution.

Rates of mutarotation, catalytic coefficients, and isotope

effects are reported for the mutarotations of a-D-xylose, a-Dglucose, and j3-D-fructose in H2O and in D2O at 20 °C. The

isotope effects (kijkd) for the mutarotation of /i-D-fructose (a pyranose-furanose interconversion) parallel in striking manner

the isotope effects for the mutarotation of a-D-glucose (an a-jS

pyranose anomerization). For each sugar, the isotope effect is lowest for the acid-catalyzed reaction and highest for the water- catalyzed reaction. The parallelism of the values obtained for the isotope effects under various conditions shows that the rate- determining steps in the two reactions are similar. Presumably,

in both instances, the overall mutarotation arises from

concurrent reactions operating on different species of the sugar and showing substantially different isotope effects. The gradual

change in the isotope effect indicates that, under the conditions

studied, three reactions take place concurrently.

The following isotope effects were found for the mutarotations

at 20 °C: For a-D-glucose, Ah,w+/W)+ = 1 .39: Ah2(VW^=3.87;

and Ab/A*b=1 .83. For /3-D-fructose, A//:),,+/A:;j2o+=l .39;

kniiil ki)2„=^ \ and kHlk*ri='\. 92. Mechanisms are presented for the several concurrent acid- and base-catalyzed mutarotation

reactions.

Calculated transition strengths between the configurations 5d%s

and 5d>*6p in Au iii, H. Mendlowitz, 7. Res. NBS, 71A2-446,

pp. 149-156 (Mar.-Apr. 1967).

Key words: Au iii; calculated transition strengths;

configurations 5d%s and 5d^6p.

The transition strengths have been calculated for transitions between configurations 5d^6s and 5d*'6po{ Au iii based upon the wavefunctions given by Shadmi. These strengths have been

compared with the estimated intensities given by Iglesias and

are found to be in substantial agreement.

Hartree-Fock multiplet strengths for K i, Ca 11, and Sc iii, A. W.

Weiss, y. yVB5',71A2-447, pp. 157-162 (Mar.-Apr. 1967).

Key words: Multiplet strength; self-consistent field; term

values; wavefunctions.

Analytical approximations to Hartree-Fock wavefunctions

have been computed for the 4s, 4p, and 2d states of K i, Ca 11, and Sc in. Multiplet strengths for the 4s-4p and 4p-3d

transitions in these ions are also computed. Examination of the

results indicate that relaxation of the core in the field of the series electron accounts for a large portion of the core polarization

effect, at least for the 3d level. Serious cancellation is found to invalidate the dipole velocity results of the 4p-3i/ transition in Ca

IL

7
Oscillator strengths for the helium isoeiectronic sequence, A. W.

\^ciss, J. Res. /VB5,71A2-448,pp. 163-168 (Mar.-Apr. 1967).

Key words: Atomic term value; oscillator strengths;

wavefunctions.

Variational wavefunctions have been computed for the I'S,

2i,3s, 2'-'P, 3'-'P, and 3'-*D terms of ions in the helium

isoeiectronic sequence from He through Ne+'*. The trial functions are Hylleraas type expansions, explicitly involving r,>, and with expansion lengths of around 50 terms, differing slightly for the different states. Oscillator strengths have been computed

for all the allowed transitions by both the dipole length and

velocity formulas. Agreement between these forms,

comparisons with very accurate data for neutral helium, and the accuracy of the computed energies all point to considerable

reliability of the results for the entire sequence, probably around

5 percent, if not better.

Solvent effects on the ultraviolet absorption of polystyrene, V. M.

Story, D. Mclntyre, and J. H. O'Mara, J. Res. NBS, 71A2-

449, pp. 169-175 (Mar.-Apr. 1967).

Key words: Carbon tetrachloride; cyclohexane:

ethylbenzene; extinction coefficient; polymer; polystyrene;

solvent effects; ultraviolet absorption.

NBS Standard Sample Polystyrene 705 is shown to exhibit a

small, but significant, hypochromism in the 38,300 cm ' region in several solvents compared to the model compound,

ethylbenzene. Beer's law is not obeyed for solutions of the polymer in all solvents. The concentration dependence of the extinction coefficient is related to the scattered light and its dependence on the activity coefficient of the solvent. The

specific extinction coefficients for polystyrene 705 in cyclohexane and in carbon tetrachloride are 20.89 and 27.38,

respectively.

May-June 1967

Measured relative enthalpy of anhydrous crystalline aluminum

trifluoride, AIF,, from 273 to 1173 °K and derived

thermodynamic properties from 273 to 1600 °K, T. B. Douglas

and D. A. Ditmars, J. Res. NBS, 71A3-450, pp. 185-193

(May-June 1967).

Key words: Aluminum trifluoride; drop calorimetry,

enthalpy measurements; high-temperature calorimetry;

phase transition; pretransition phenomena; specific heat; thermodynamic properties.

The enthalpy of a high-purity sample of anhydrous crystalline

aluminum trifluoride, AIF.-,, relative to that at 0 °C (273.15 °K), was precisely measured with an ice calorimeter and a "drop"

method at 18 temperatures starting at 50 °C and proceeding in 50-deg steps to 900 °C (1 173.15 °K). Thirty additional enthalpy

measurements between 450 and 453 °C revealed a gradual

transition. A simple general relation for the progress of

transition when impurity is in solid solution is derived. The

relation fits the observed transition data and indicates a first- order transition temperature of 455 °C (728 °K). X-ray powder

patterns on the sample, measured in the Crystallography Section

of the NBS, established the existence of a phase transition by

showing not only the known hexagonal structure at room

temperature (even after violent quenching from above the

transition temperature region) but a new, simple-cubic structure

at 570 °C (843 °K). The smooth heat-capacity curve formulated

from the data merges very smoothly with that representing

published precise low-temperature data. The common

thermodynamic properties were derived, and are tabulated at and above 273.15 °K, with extrapolation up to 1600 °K.

The heat of formation of boron trifluoride by direct combination of the elements, E. S. Domalski and G. T. Armstrong, J. Res. A'B5,71A3-451,pp. 195-202 (May- June 1967).

Key words; Bomb calorimeter; boron; boron trifluoride; fluorine; heat of formation; Teflon.

The energy of combination of crystalline boron in gaseous

fluorine was measured in a bomb calorimeter. The experimental

data combined with reasonable estimates of all known errors may be expressed by the equation:

B{c)+ 3/2F2(g) = BF3(g), A//°y298 = - 27 1 .03 ± 0.5 1 kcal mol"'.

This result is compared with other recent work on and related

to the heat of formation of boron trifluoride.

An equation of state for fluid parahydrogen from the triple-point

to 100 °K at pressures to 350 atmospheres, R. D. Goodwin, J. Res. NBS 71A3-452, pp. 203-212 (May-June 1967).

Key words: Equation of state; hydrogen; parahydrogen;

fK7-relations; thermodynamic properties.

This equation of state may be useful for interpolation and for computations which include thermodynamic properties of

parahydrogen. A principal advantage is that it employs only one

set of 24 coefficients for all fluid states. The basic form is relatively simple. And adjustment term for the critical region

leads to good agreement with published PVT data and specific

heats in this especially difficult area. The forms of fitting

functions were developed by systematic trial methods using least squares to find the coefficients.

The dissociation constants of some disubstituted anilines and

phenols in aqueous solution at 25 °C, R. A. Robinson, J. Res. NB5,71A3-453,pp. 213-218 (May-June 1967).

Key words: Dissociation constant; substituted anilines; substituted phenols.

The dissociation constants of six disubstituted anilines and of

five disubstituted phenols in aqueous solution at 25 °C have been

measured using the spectrophotometric method. Consideration

is given to the extent to which these dissociation constants can

be predicted from corresponding values for monosubstituted

anilines and phenols. In addition, the question as to whether the pK value of a substituted aniline can be predicted from the pK

value of a phenol with substituents in the same positions is also

investigated.

Third virial coefficient for air-water vapor mixtures, R. W.

Hyland and E. A. Mason,y. Res. NBS, 71A3-454, pp. 219-224

(May-June 1967).

Key words: Chemical association; Lennard-Jones potential

parameters; virial coefficients; water vapor-air mixtures.

The third interaction virial coefficient C„„.„ for air-water vapor

mixtures is estimated in the temperature range 0 to 100 °C, by means of an approximate method based on molecular

associafion. The results are believed accurate to within a factor of two. The value of Caww can be combined with previous

estimates of the other interaction coefficient C„„„ and the values

of the third virial coefficients of pure air and pure water vapor, to give a quantitative description of the equation of state of air- water vapor mixtures through the complete third virial

coefficient. It is shown that the maximum total contribution

from both C„u.u- and C,,,,,, to the compressibility factor is only of

the order of parts in 10" up to 100 °C and 100 atmospheres total pressure. At -50 °C, it can be shown by extrapolation of Cww

that the contribution of the Cuwu- term to the compressibility

factor is only on the order of parts in 1 0".

8
Recrystallization and melting of partially melted stark rubber, D.

E. Roberts, J. Res. NBS 71A3-455, pp. 225-229 (May-June

1967).

Key words: Crystal size; crystallized rubber; heating rate; melting range; melting temperature; oriented; partial

melting; recrystallization; rubber; slow melting; stark rubber. Two specimens from a piece of stark rubber which had a melting temperature originally at 41 °C were partially melted at 38 °C and allowed to stand for 1 1 years, one at about 25 °C, the other at 38 °C. The first showed a continuous slow decrease in specific volume, while the second increased slowly in volume for 5 months and remained constant for about 5 months more before

showing the continuous slow decrease. The melting temperature

of the first increased to 45 °C and the melting range was

broadened. The melting temperature of the second became 52

°C and the range was narrowed. Perfecting or enlarging of

crystals and the effect of higher recrystallization temperatures

have influenced the melting temperatures. The effect of heating

rate is discussed in connection with slow increases in volume,

attributed to relaxation of oriented regions, during melting.

Effects of a distribution of volume relaxation times in the annealing

of BSC glass, P. B. Macedo and A. Napolitano, J. Res. NBS,

71A3-456, pp. 23 1-238 (May-June 1967).

Key words; Annealing; borosilicate crown glass; glass;

index of refraction; relaxation times; two-relaxation time

model; volume relaxation. The influence of a distribution of relaxation times is studied in annealing experiments. A two-relaxation time model is proposed, which permits the calculation of the distribution of

relaxation times from the crossover data of Spinner and

Napolitano as well as that of Ritland. This model also characterizes the structure of any glass in terms of two

parameters. Thus, quenched equilibrium as well as nonequilibrium glass were compared with rate cooled glasses

with respect to their behavior upon further annealing as well as

their conductivity at low temperatures with excellent agreement.

Borosilicate crown glass was found to have a narrow

distribution of relaxation times which is particular to associated

liquid monomers rather than polymers. The results can be

explained in terms of a topological model for the distribution of

relaxation times. The temperature dependence of the viscosity is due to a true activation energy rather than a free volume effect.

July-August 1967

Kinetics of crystallization in multicomponent systems: I. Binary

mixtures of w-paraffms, J. 1. Lauritzen, Jr., E. Passaglia, and E. A. DiMarzio.7. Res. NBS 71A4-457, pp. 245-259 (July-Aug.

1967).

Key words; Crystal growth; kinetics; multicomponent

systems; n-paraffins; pair distributions; phase diagrams.

The kinetics of crystallization of a binary mixture of n- paraffins is treated using a theory for the rate of growth of chains

in multicomponent systems. The kinetic chain is considered to be a strip of crystalline material composed of molecules of both

components that is growing on a substrate of uniform thickness.

This substrate is considered to be a close-packed surface step. Using the binary mixture of C^jHso and C^ciH^ as an example,

the calculations are carried out by an iterative procedure so that the mean thickness of the strip equals that of the substrate. This

procedure necessitates modification of the rate constants that would be used without this requirement. The rate of growth of

the strips (total flux) is calculated as well as their composition

over an appropriate range of temperature and a complete range

of liquid compositions. The pair distribution in the strips is also determined. The substrate is assumed to be unkinked in the

calculations, whereas the substrate is probably highly kinked in the actual system. For this reason the calculated total flux is probably not representative of the actual crystal growth rate in a binary mixture of C24H5o and C26H54. It is believed that the calculated compositions are reasonably accurate. For a binary

mixture of longer Ai-paraffins (e.g., C.-,i)Hio2 C.-,2Hi(i,i) the substrate should have many fewer kinks, and the total flux calculated by

this theory will be more closely related to actual crystal growth

rate studies. However, no data exist for such systems.

Kinetics of crystallization in multicomponent systems: II. Chainfolded polymer crystals, J. I. Lauritzen, Jr. and E. Passaglia, 7. Res. A'B5 71A4-458, pp. 261-275 (July-Aug. 1967).

Key words: Chain-folded crystals; crystal growth; kinetics; multicomponent systems; surface free-energy.

Using polyethylene as an example, the kinetics of growth of

chain-folded polymer crystals is treated using a theory for the

kinetics of growth of chains in multicomponent systems. The

kinetic chain is considered to be a chain-folded strip growing on

the lateral face of a chain-folded lamella, and the various

components are the possible lengths Ij the polymer chain may

form on folding at the end of the growing strip. Thus, the number

of components is in principle infinite, but it is sufficient to take a number of the order of 20-50 for the calculations. By an iteration procedure, the calculations are carried out so that the average

thickness of the strip is the same as that of the chain-folded

lamella on which it grows. This necessitates modification of the

rate constants that would be used without this requirement. The

rate of growth, average thickness and its standard deviation, and

the pair distribution are calculated as a function of undercooling

and other relevant parameters of the system. The results for the

rate of growth and thickness are similar to those of simpler

theories, provided that the constant end-surface free-energy of

those theories is replaced by a temperature dependent

"effective" surface free-energy. The standard-deviation of the thickness is larger than commonly believed, values of 8 to 14 A

being typical. Consequently, the crystals as grown may have

quite rough fold surfaces, although the equilibrium roughness

will be less.

Infrared absorption spectra of 2-oxo-l,3-bis(phenylhydrazono)

derivatives and related bis- and tris-phenylhydrazones, A. J. Fatiadi.y. Res. NBS 71A4-459, pp. 277-285 (July-Aug. 1967).

Key words: Absorption spectra: infrared spectra; mono-,

bis-, and tris-(phenylhydrazones); phenylazo compounds.

The infrared absorption spectra of six 2-oxo-l,3-

bis(phenylhydrazones), four tris(phenylhydrazones), and six related mono- and bis-(phenylhydrazono) derivatives are presented. For comparison, partial spectra of ten selected aromatic azo compounds are also given and discussed.

The important features of the absorption bands arising from

the N = N (1579 to 1558 cm"' and 1447 to 1408 cm-'), N-H

(bending) (1557 to 1515 cm-'), and Ph-N (1 163 to 1 123 cm~')

groups are presented and discussed.

Dielectric constant of /i-hexane as a function of temperature,

pressure, and density, F. 1. Mopsik,7. Res. NBS 7IA4-460, pp. 287-292 (July-Aug. 1967).

Key words: Clausius-Mossotti: density; dielectric constant;

dilatometer; function; high pressure; /!-hexane; pressure;

three-terminal electrode set. A description is given of apparatus employing a cell that is both a bellows dilatometer and a three-terminal electrode set for measuring simultaneously the density and dielectric properties of

313-589 0-69—

9
liquids as functions of temperature and pressure. Measurements

are possible at temperatures from 120 °K to over 300 °K and

pressures from 1 to 2000 atm with an uncertainty of 0.03

percent. The density, dielectric constant, and Clausius-Mossotti

function of «-hexane have been measured for temperatures from

223 to 298 °K (-50 to 25 °C) and at pressures from 1 to 2000

atm. There is a linear decrease in the Clausius-Mossotti

function with density and a decrease with temperature corre- sponding to an effective dipole moment of 0.085 debye.

Heat capacities and related thermal data for diethyl phthalate

crystal, glass, and liquid to 360 °K, S. S. Chang, J. A. Horman,

and A. B. BestuI, J. Res. NBS 71A4-46I, pp. 293-305 (JulyAug. 1967).

Key words: Annealed glass; crystal: diethyl phthalate; glass

transformation: heat capacity calorimetry; molecular

configurational state; normal and supercooled liquid:

quenched glass; residual (configurational) entropy:

thermodynamic properties.

Experimentally determined heat capacity values, precise to within 0.1 percent, and related thermal data are reported for quenched and annealed diethyl phthalate glasses from 10 °K to the glass transformation temperature, 7,, (around 1 80 °K), for the

liquid from T,, to 360 °K, and for the crystal from 10 °K to the melting temperature (269.9 °K). The mole fraction of liquid

soluble, solid-insoluble impurity in the sample as determined by

fractional melting was 0.0012. Common thermodynamic

properties calculable from the experimental data are reported.

The heat capacities of the two glasses differ by more than the uncertainty of the measurements, and both lie below that of the

crystal in the range from 30 to 75 °K. At low temperatures, just

above 10 °K, the heat capacities of the glasses rise as much as 8 percent above that of the crystal.

Heats of formation of aluminum diboride and a-aluminum

dodecaboride, E. S. Domaiski and G. T. Armstrong, J. Res. NBS 11X4-462, pp. 307-315 (July-Aug. 1967).

Key words: Aluminum diboride: a-aluminum dodecaboride;

aluminum fluoride: bomb calorimeter; boron trifiuoride; fluorine; heat of combustion; heat of formation: Teflon.

The energies of combustion of AIB2 and a-AIBi-i were measured in a bomb calorimeter using fluorine as the oxidant.

Major problems of this investigation were the assessment of the

state and distribution of impurities in the samples and the establishment of the stoichiometry of the aluminum boride

phase. We obtain - 1 6 ± 3 kcal mol -

' and - 48 ± 1 0 kcal mol -

for the heats of formafion of AIB2 and a-AIB,2, respectively.

The uncertainties cited are the overall experimental errors. Their magnitudes are chiefly due to uncertainties in the impurity

correction applied and the uncertainties in the heats of formation

of the combustion products.

Effect of environment upon the melting point of Al-iO,). S. J. Schneider and C. L. McDaniel, 7. Res. NBS 71A4-463, pp. 317-333 (July-Aug. 1967).

Key words: AljOn: dissociation; environmental effects; melting point; premelting.

The melting point of Al_,0:i has been determined in vacuum,

air, argon, and helium utilizing iridium or tungsten containers.

All melting point experiments were conducted in induction

furnaces capable of heating small samples under blackbody

conditions to 3000 °C in vacuum, 2600 °C in inert atmospheres,

and 2400 °C in air. Temperatures were continuously monitored

with a recording photoelectric pyrometer which has a sensitivity

of ±0.2° at 1063 °C and ±1° at 2000 °C. Melting points were

determined on specimens having a purity in excess of 99.9

percent. The data indicated that the melting point of ALO;i

determined in vacuum (~ 6.5 x 10 •'^ torr) is 2051 °C (IPTS). The

overall maximum uncertainty was estimated to be ±6 °C. The

measurements themselves were precise within ±1.5 °C, Vacuum

treatment had least detrimental effect upon the AUOa specimens.

Each of the gaseous atmospheres including air yielded lower

melting points for ALO.j, presumably due to a premelting

phenomenon,

September-October 1967

Zeeman effect in positronium annihilation at low temperatures, W.

C. Sauder and R. D. Deslattes, J. Res. NBS 71A5-464, pp. 347-353 (Sept,-Oct. 1967).

Key words: Annihilation radiation: Compton wavelength of

the electron: positronium: quenching.

The annihilation of positronium is discussed as a means of

obtaining a precise measurement of the Compton wavelength of

the electron. In particular the spectral line shape of the

annihilation radiation is calculated for positronium thermalized

in helium gas cooled to the region of its critical point with an

applied magnetic field sufficient to yield a three photon to two

photon branching ratio of unity for the '-'S,, component. Under

such conditions the rapid thermalization of the positronium and

the long half-life of two photon decay out of the predominantly

triplet state make possible the production of rather narrow

spectral distributions. An exact solution of the Zeeman effect in positronium is included. This study suggests that a wavelength

determination beyond the one part per million level is attainable within the range of present technology.

Surface-layer relaxation in the dielectric spectrum of CaF^ doped

with GdF:i, A. D. Franklin, S. Marzullo, and J. B. Wachtman,

Jr,,y. Res. A'B5 71A5-465,pp. 355-362 (Sept.-Oct. 1967).

Key words: CaF^; conductivity: crystals; defect pairs: dielectric relaxation; electrode capacitance: surface layers.

CaFi crystals doped with 0. 1 percent GdF.i were observed to develop surface layers when annealed above 700 °C in air, during

application of Pt paste electrodes. The conductivity in these

surface layers was much higher than in the bulk, due presumably

to the large numbers of anion vacancies produced by dissolved

oxygen. The presence of these high conductivity surface layers

produced a relaxation in the dielectric spectrum with (1) an

approximately temperature-independent magnitude, Ak, (2) a

relaxation time controlled by the conductivity of the surface

layers, and influenced therefore by heat treatment of the specimen, and (3) an activation energy equal to that for conductivity of the surface layers, about 0.9 eV. This relaxation

is sufficiently similar to dielectric relaxations observed

previously in ionic crystals and ascribed to defect pairs to suggest that great care must be taken in interpreting dielectric measurements in these materials. What is thought to be dipole

relaxation may in fact be due to the presence of thin layers

accidentally present on the crystal. There is a marked electrode

polarization effect in these crystals. The electrode capacitance

at not-too-low frequencies depended upon the frequency and

both the number and mobility of the charge carriers with 3/2

power laws.

Thermal expansion of rutile from 100 to 700 °K, R. K. Kirby,y,

Res. NBS 71 A5-466, pp. 363-369 (Sept.-Oct. 1 967).

Key words: Anisotropic crystal: Gruneisen's constant;

interferometer; rutile; thermal expansion.

The thermal expansion of a single crystal of rutile (TiO^) was

determined in directions parallel to its crystallographic axes. A

unique macroscopic technique was used wherein a cube-shaped

specimen was cut from the anisotropic crystal, each of its six faces polished flat and nearly parallel to the face opposite it, and

10
the expansion measured along each of its three body axes with an

Abbe-Pulfrich interferometer. The relationship between the expansion along the body axes of the specimen and that in the

crystallographic directions was determined from a Laue x-ray

pattern. The unusual behavior of the thermal expansion that was

observed can be explained by assuming an acoustical and optical

contribution where the corresponding Gruneisen constants are 2.80 and 0.75 respectively.

Mass spectrometric study of photoionization. VII. Nitrogen dioxide

and nitrous oxide, V. H. Dibeler. J. A. Walker, and S. K.

Liston.y. Res. NBS 71A5-467, pp. 371-378 (Sept.-Oct. 1967).

Key words: Dissociation; fragment ions: ionization; mass

spectrometer; molecule: NO2: NOj+ N2O+;

photoionization; threshold; ultraviolet; vacuum.

Photoionization efficiency curves are obtained for the molecule and fragment ions of NOj and NjO from ionization threshold to 600 A. Features of the molecule ion curves are ascribed to autoionization and the Rydberg levels are correlated with reported spectroscopic observations. The minimum onset

of ionization for NO2 occurs at 1272 A (9.75 eV). The threshold

value of 12.34 eV for the NO+ fragment results in D(NO-O) of

3.09 eV in good agreement with that calculated from

thermochemical heats of formation. The 0* ion is apparently

formed with 0.1 eV excess energy. The minimum threshold

energy for the N2O+ ion is 962 A (12.89 eV). The N2+ fragment

ion curve has a threshold at 17.29 eV corresponding to the thermochemical bond energy, D(N2 — 0)= 1.67 eV. However a lower-energy threshold at 15.57 eV is ascribed to ionization of

molecular nitrogen from an unknown source. There is no

evidence for an ion-pair process. The ground state transition for NO+ is forbidden by spin conservation rules. The observed

threshold is 0.8 eV in excess of the calculated value and suggests a vibrationally excited state of the ion. The N+ ion is also formed

with excess energy.

Ionization constants of substituted benzoic acids in ethanol-water,

G. M. Brauer. G. Durany, and H. Argentar. J. Res. NBS

71A5-468, pp. 379-384 (Sept.-Oct. 1967).

Key words: Allyl- and propenylbenzoic acids; change of pK

with dielectric constant; Hammett sigma constants;

ionization constants; pK values in ethanol-water; sigma

constants in ethanol-water; substituted benzoic acids. The thermodynamic ionization constants of meta and para

substituted allyl- and propenylbenzoic acids were determined

potentiometrically in aqueous ethanol of varying ethanol

concentration. The pK values increase with increasing ethanol

content. The relative acid strength does not vary with change in solvent concentration. The Ap/T/A percent ETOH increases

with ethanol content of the medium until a maximum is reached

around 40 weight-percent ethanol. A plot of pK + \og [H2O]

versus the reciprocal of the dielectric constant of the solvent

gives a nearly linear relationship to about 44 weight-percent

ethanol. From pK values found in the literature a similar linear relationship exists for other benzoic acids. With the exception of

the p-propenylbenzoic acid the cr-substituent constants of the Hammett equation do not change greatly with ethanol

concentration. This behavior may be indicative that the solvation shell surrounding the p-propenyl-acid differs from that of other benzoic acids.

Dissociation constants of some substituted nitrophenols in aqueous

solution at 25 °C, R. A. Robinson, 7. Res. NBS 71A5-469, pp. 385-389 (Sept.-Oct. 1967).

Key words: Dissociation constant; nitrophenols;

substituted phenols.

The dissociation constants of twelve substituted phenols with

a nitro group in the o- or p-position have been determined by

spectrophotometric measurements in aqueous solution at 25 °C.

November-December 1967

(A Memorial Issue to William Frederick Meggers,

July 13, 1888 to November 19, 1966)

The second spectrum of ytterbium (Yb 11), W. F. Meggers, (Edited

by C. E. Moore), J. Res. NBS 71A6-470, pp. 396-545 (Nov.- Dec. 1967).

Key words: Analysis of Yb 11; atomic energy levels of Yb ir, classified line of Yb 11; spectrum, Yb 11; ytterbium, second

spectrum; Zeeman effect in Yb 11. The analysis of Yb 11 provides the most complete

interpretation of a complex rare-earth spectrum known to date. The total number of energy levels is 315; 141 even levels and

174 odd levels. Three coupling schemes are represented: LScoupling for the terms 4f-*ns-S{n=6, 7. 8); 4f^nd'D{n=5.6J) and

4/'^6^2 -F°: y/J/z-coupling for the levels from the configurations

4f"6s6p and 4/"5<i6p; and y;L;/-coupling for those from the 4f'-'5d6s and 4f '-'5d- configurations.

More than 5000 Yb 11 lines are listed, of which about 80

percent have been classified, and 95 percent of the total intensity

is accounted for. Observed Zeeman patterns for over 1 000 lines have yielded ^.'-values for 258 levels. The agreement between

observation and theory is excellent as regards both the positions

of the energy levels and the ^-values. The theoretical work was

done in collaboration with Racah and his associates over more

than a decade.

A limit, 98150 K, giving an ionization potential of 12.17 eV,

has been derived from the three-member -S series. An improved description of technetium spectra (Tc i and Tc 11), 2000 to 9000 A, W. R. Bozman, W. F. Meggers, and C. H.

Corliss. J. Res. NBS 71A6-471, pp. 547-565 (Nov.-Dec.

1967).

Key words: Spectra of technetium; technetium, spectra of; wavelengths of technetium.

A new description of technetium spectra has been made that is more complete and provides more accurate data on wavelengths

than those reported heretofore. The observations were made in the region 2000 to 9000 A with arc and spark sources. Larger

samples of technetium and spectrographs of higher resolution were used and the number of lines reported (4500) is more than

doubled. The intensities are estimated over a range from 1 to 20,000 and the relative strengths in arc and spark permit

assignment of the origin of the lines to neutral atoms (3300 lines) or ions (1200 lines).

Lifetimes of energy levels in neutral iron, C. H. Corliss and J. L. Tech.y. Res. NBS 71X6-472. pp. 567-573 (Nov.-Dec. 1967).

Key words: Atomic spectra; energy levels; iron; iron, lifetimes in; lifetimes in Fe i; radiative lifetimes; spectroscopy.

Mean radiative lifetimes for 408 energy levels of neutral iron

are calculated from the known transition probabilities of 3288

lines of Fe 1.

Transition probabilities in argon i, C. H. Corliss and J. B. Shumaker, Jr.. J. Res. NBS 71A6-473, pp. 575-583 (Nov.- Dec. 1967).

Key words: Argon; atomic spectra; transition probabilities.

In order to derive transition probabilities from intensity

measurements of Ar i lines made by Dieke and Crosswhite, new

11
transition probabilities for 26 lines from high levels in Ar i have

been measured in a high current constricted arc. With these

data, relative level populations of Ar i in Dieke and Crosswhite's

microwave discharge are determined and transition probabilities for 240 lines of An in the wavelength range 4100 to 9800 A are derived. The new values are compared with other published

values.

The fifth spectrum of praseodymium, V. Kaufman and J. Sugar, 7. Res. NBS 71A6-474, pp. 583-585 (Nov.-Dec. 1967).

Key words: Atomic energy levels; isoelectronic sequence;

praseodymium; rare earth; sliding spark discharge lamp;

spectrum.

Twelve spectral lines of quadruply-ionized praseodymium in the region 840 to 2250 A are reported. Five terms (4/^F, Sd'^D,

6s -S, 6p -P, and 7s -S) and the hyperfine splitting of the 6s -S term are given. A calculation of the principal ionization energy

(Pip4+^ Pr^+) leads to a value of 57.44 eV with an estimated

uncertainty of ±0.05 eV.

Fundamental energy levels of neutral promethium (Pm i), J. Reader and S. P. Davis, 7. Res. NBS 71A6-475, pp. 587-599

(Nov.-Dec. 1967).

Key words; Atomic spectroscopy; electronic energy levels; neutral atom; promethium; rare earth. The spectrum of atomic promethium has been observed with a

variety of light sources and spectrographs. The Zeeman effect has also been recorded. Analysis of the spectrum shows that the ground configuration of the neutral promethium atom is 4p6s'\

The relative positions (in cm-') of the low levels of this configuration are:

61-1° "5/2 0.00 61-1° " 13/2 3919.03 6p°

^5/2 5872.84

6H°"7/2 803.82 "15/2 5089.79 epo

^7/2 6562.86

"9/2 1748.78 " 1/2 5249.48 6po, 7497.99

BH" , "11/2 2797.10 r 3/2 5460.50 6p°r , 11/2 8609.21

This group represents all levels of 4f'6s'- expected below

14.000 cm'. From these results the following values of

interaction parameters and their estimated uncertainties have

been inferred:

C^/=925±20 cm' £'•'=5 1 0±20 cm'

Data on 209 upper levels of even parity and 714 classified

lines are given.

12
3.2. PAPERS FROM THE JOURNAL OF RESEARCH OF THE NATIONAL BUREAU

OF STANDARDS, SECTION B. MATHEMATICS AND MATHEMATICAL PHYSICS,

VOLUME 70B, JULY-DECEMBER 1966

July-September 1966

Error bounds for asymptotic solutions of differential equations. I. The distinct eigenvalue case, F. Stenger, J. Res. NBS. 70B3-

180, pp. 167-186 (July-Sept. 1966).

Key words: Asymptotic solutions; eigenvalues; error term;

matrices; norm bounds; vector bounds; Volterra vector

integral equations.

The method of Olver for bounding the error term in the asymptotic solutions of a second-order equation having an

irregular singularity at infinity is extended to the general system

of n first-order equations in the case when the eigenvalues of the lead coefficient matrix are distinct. Vector and norm bounds are given for the difference between an actual solution vector and a

partial sum of a formal solution vector. Two cases are

distinguished geometrically: In one it is possible to express the error vector by a single Volterra vector integral equation; in the other it is necessary to use a simultaneous pair of Volterra vector

integral equations. Some new inequalities for integral equations

are given in an appendix.

Error bounds for asymptotic solutions of differential equations. II. The general case, F. Stenger, 7. Res. 70B3-181, pp. 187- 210 (July-Sept. 1966).

Key words: Asymptotic solutions; error bounds; integral

equafions; matrices.

The results of the preceding paper are extended to the general

system of n first-order differential equations having an irregular

singularity of arbitrary rank at infinity. Formal solutions are

explicitly constructed for the system in canonical form. Proofs

of existence and uniqueness of solutions of integral equations

defining the error are given. As an example, the case n=2 is solved completely, and a flow chart of the transformations of this case to canonical form is included.

On the approximation of functions of several variables, B. Mond

and O. Shisha, J. Res. NBS, 70B3-182, pp. 211-218 (JulySept. 1966).

Key words: Approximations; convergence; multidimensional; polynomials; functions; variables; Hermite-Fejer;

Bernstein; Chebyshev.

The purpose of this note is to point out how a certain type of

approximation to functions of one real variable gives rise to similar approximations to functions of several variables. Information on the rapidity of convergence in the one

dimensional case, yields at once corresponding information for the multidimensional case.

Finding a rank-maximizing matrix block, A. J. Goldman and M.

Newman, J. Res. NBS 70B3-183, pp. 219-220 (July-Sept.

1966).

Key words: Matrix; block; rank; algorithm.

An algorithm is developed for the following problem: Given

three matrices of respective dimensions sx s, sx t, and / x j, to find a / X f matrix such that the (i -I- /) x (s + /) matrix formed

from the four blocks has maximum rank.

On certain discrete inequalities and their continuous analogs, A. M. Pfeffer, J. Res. NBS, 70B3-184, pp. 221-231 (July-Sept.

1966).

Key words: Inequalities; norms; Wirtinger.

The purpose of this paper is to find inequalities between the

Z. --norms of a function and its ^h and wth derivatives.

October-December 1966

A random walk model of chain polymer adsorption at a surface,

in. Mean square end-to-end distance, R. J. Rubin, 7. Res. NBS,

70B4-185, pp. 237-247 (Oct.-Dec. 1966).

Key words: Adsorption; chain polymer; critical energy;

generating function; lattice model; partition function;

random walk. A 6-choice simple cubic lattice model of adsorption of an

isolated polymer chain at a solution surface is investigated. The

mean square components {x'^{N)) and (zHN)) of the end-to- end distance are computed as a function of the adsorption energy

per monomer unit in the limit of a very long polymer chain. In

the calculation, one end of the polymer chain consisting of N

monomer units is constrained to lie in the surface; and {x^(N))

and (z-(N)) are, respectively, the mean square displacement of

the free end of the chain parallel to the solution surface in one of

the lattice directions and normal to the solution surface. The

limiting value of {x-{N))IN as A' ^ oo js a continuous function of

6, the dimensionless adsorption energy per monomer unit, and is equal to 1/3 for 0«ln (6/5) and (l/2)[l-l-(l/4)(e^-l)->]-"2 for

6^ In (6/5). The limiting value of {z^{N)}IN as N^oo is a discontinuous function of 6 and is equal to 2/3 for 0<ln(6/5), 1/3 for 0= ln(6/5), and 0 for 0 > ln(6/5). The relation of these results to earlier investigations and the generalization of these results to other cubic lattice models is discussed.

Abscissas and weights for Gaussian Quadrature for N=2 to 100,

and N=125, ISO, 175, and 200, C. H. Love, J. Res. NBS,

70B4-1 86, pp. 249-256 (Oct.-Dec. 1966).

Key words: Gaussian quadrature; integral equations;

numerical integration; zeros of Legendre polynomials.

The abscissas and weights for Gaussian Quadrature of order

N=2 to 100, and ^=125, 150, 175, and 200 are given. The

abscissas are given to twenty-four places and the error is estimated to be no more than one unit in the last place. The

weights are given to twenty-three places and the error is estimated to be no more than 1 unit in the last place.

Transverse impact of a linear three-element spring and dashpot

model filament: Theory, J. C. Smith, J. Res. NBS. 70B4-187,

pp. 257-264 (Oct.-Dec. 1966).

Key words: Characteristics; impact; linear viscoelasticity;

partial differential equations; stress waves; wave

propagation.

The mathematics of wave propagation in a viscoelastic filament subjected to constant velocity transverse impact is discussed. The equations governing the stress-strain-time

13
behavior are assumed to be those for a linear model consisting of

a spring coupled in parallel with a spring and dashpot in series. The nature of the solution is discussed, and a method is described

for calculating the configuration, and the stress, strain, and

particle velocity distributions along the impacted filament. The

method used consists of an integration along the characteristics of the system of differential equations describing the problem.

Functions for thermal stress calculation near a transient heat source on a flat surface, S. Jarvis, Jr., and G. Hardy, J. Res. ^^5 7084-] 88, pp. 265-272 (Oct.- Dec. 1966).

Key words: Elastic stress; heat transfer; plane strain; thermal stress; yield stress. When an initially unstressed elastic solid at uniform

temperature is subject to a transient, locally two-dimensional

heat flux on a flat surface, the two-dimensional total stress field near the wall is locally determined for short times and may be

constructed from the functions described in this report; Fortran programs are available for their computation. In particular,

maximum total stress and total stress fields for initially large heat

fluxes are readily obtained for estimations of yield probability.

14
PAPERS FROM THE JOURNAL OF RESEARCH OF THE NATIONAL BUREAU

OF STANDARDS, SECTION B. MATHEMATICS AND MATHEMATICAL PHYSICS,

VOLUME 71B, JANUARY-DECEMBER 1967

January-March 1967

Algorithms for frames and lineality spaces of cones, R. J.-B. Wets

and C. Witzgall, J. Res. NBS, 71BM89, pp. 1-7 (Jan.- Mar.

1967).

Key words: Algorithm; cone; convex hull; face; frame;

lineality space; linear programming.

A frame of a cone C is a minimal set of generators, and the

lineality space L of C is the greatest linear subspace contained

in C. Algorithms are described for determining a frame and the

lineality space of a cone C(S) spanned by a finite set S. These

algorithms can be used for determining the vertices, edges, and

other faces of low dimension of the convex hull of a finite set H(S). All algorithms are based on the simplex method of linear programming. The problem of finding the lineality space can be

successively reduced to problems in spaces of lower dimensions.

The coefficients of the powers of a polynomial, M. Newman, J. Res. NBS, 71B 1 - 1 90, pp. 9- 1 0 (Jan.-Mar. 1 967).

Key words: Binomial coefficients; bounds; polynomials.

It is shown that ify(z) is a polynomial with no zeroes inside the

unit circle and if r is any positive number, then the coefficients of

f(z) tend to zero like n ' '', and this is best possible.

Stable evaluation of polynomials, C. Mesztenyi and C. Witzgall, 7. Res. Ni35,71Bl-191,pp. 1 1-17 (Jan.-Mar. 1967).

Key words: Evaluation; Newton form; polynomial; relative error; round-off. A class of Newton forms

P(x)=ao+ai(x-Xo)+. . . + a„{x-Xo) . (x-x„-i)

are discussed which admit a stable evaluation algorithm in an

interval [A,B]. Stability is defined in the paper. The estim.ate

«2 + 6M\L)L

M{L)

where L: = B—A and A/(.v):= |flo+ |fl,|x+ . . . + |a„|.x-", is shown to hold for the relative error of evaluation of P{x) in [A,B].

On involutions, O. Shisha and C. B. Mehr, 7. Res. NBS, 71B1-

192, pp. 19-20 (Jan.-Mar. 1967).

Key words: Inverses; involufions; real functions. Two methods are described of constructing real functions over

the reals which are one-to-one, assume every real value and are

their own inverses, and several examples are given. It is also shown that such a function, if everywhere continuous, is either the function f(x)=x or else is strictly decreasing.

Minimum number of subsets to distinguish individual elements, P. R. Meyers, J. Res. NBS, 71B1-193, pp. 21-22 (Jan.-Mar.

1967).

Key words: Classification design; combinatorics; set theory.

Given a set 5 of cardinality m, we determine the minimum

cardinality flm) for a family F of subsets of S such that each seS

can be expressed as the intersection of some subfamily of F. The

problem is solved in the following inverse form. For a given

number n of subsets of 5, find g{n): the maximum number of

elements of 5 which can be written as the intersection of some of

these subsets. We show that g{n) is the largest binomial

coefficient for combinations of n things.

£-Transforms, F. M. Ragab, 7. Res. NBS. 71BI-194, pp. 23-37

(Jan.-Mar. 1967).

Key v/ords: Fourier-transform; functional transforms;

generalized MacRobert's function; Hankel transform, Ktransform; Laplace transform, MacRobert's function; Ytransform.

The following transform pair is established:

g(x)= r\xynEp;ar: q: p,: {xy)^"]f(y)dy: JO

x)^n^j^ (xy)->'E

0 /f/; l-p, + -:(xy)^"

p-l- 1 ; 1 —ar + -, 1 n I ng{y)dy,

v/here n is any positive integer, and E is MacRobert's function

and the generalized MacRobert's function, respectively.

Special choices of the parameters in the last transform lead in turn to the derivation of Hankel transform, F-transform, Ktransform, Fourier transform, Laplace transform and other

integral transforms with tables to illustrate these new transforms.

Three observations on nonnegative matrices, A. J. Hoffman, J. Res. NBS, 7lBl-\95, pp. 39-41 (Jan.-Mar. 1967).

Key words: Bounds; eigenvalues; nonnegative matrices.

Some results on nonnegative matrices are proved, of which

the following is representative: LetA=(aij) be a nonnegative row

stochastic matrix. If 1 is an eigenvalue of A , then

min 1 — ^ min fly, ^ max Oij-l^-

Additional remarks on a theorem of M. Riesz, J. M. Smith, 7. Res. NBS, 71B\-\96, pp. 43-46 (Jan.-Mar. 1967).

Key words: Commutator; matrix; orthogonal; quaternions;

skew-symmetric; regular representation.

Let K be a real four-dimensional vector space, whose

underlying geometry is the metric defined by the matrix

"l 0 0 d"

0 10 0

0 0-1 0

0 0 0 -1

The following theorem is proved.

Theorem: // A and B are real, skew-symmetric, orthogonal

(with respect to K) linear transformations on V, then

[A ,B]=AB-BA is a multiple of a real, skew-symmetric,

orthogonal (with respect to K), linear transformation on V.

K =

15
The theorem is proved by use of the first and second regular

representations of the real quaternions.

Methods are given for constructing ail 4x4 matrices which

are skew-symmetric and orthogonal with respect to K. and all 4x4 matrices which are skew-symmetric (in the Euclidean

sense) and orthogonal with respect to K.

April-September 1967

Poincare's conjecture is implied by a conjecture on free groups, R. D. Traub, y. Res. NBS 71B2&3-197, pp. 53-56 (Apr.-Sept.

1967).

Key words: Free group; handlebody: homeomorphism;

simply connected: topology; 3-manifold; 3-sphere.

Poincare's conjecture is implied by a single group-theoretic

conjecture. The converse is also valid modulo a hypothesis on

the uniqueness of decomposition of the 3-sphere as the union of

two handlebodies intersecting in a torus.

Construction of EPr generalized inverses by inversion of nonsingular matrices, J. Z. Hearon,y. Res. A'B5 71B2&3-198,

pp. 57-60 (Apr.-Sept. 1967).

Key words: EPr matrices; generalized inverse; matrix.

Any matrix B such thai A BA=A is called a C, -inverse of/) and

a Ci-inverse of A such that BAB=B is called a C2-inverse of A. Some properties of such inverses are established. It is shown

that if A is p-square of rank q<p and P is any positive

semidefinite matrix, whose rank is the nullity of A. such that U=A+P is nonsingular, then B=U 'A U'^ is a Cs-inverse of A

with the property that null space B=null space B*. That such a P

exists for arbitrary square A is shown. The relation between this result and the work of Goldman and Zelen is discussed.

A generalized matrix version of Rennie's inequality, J. Z. Hearon,

J. Res. NBS 71B2&3-199, pp. 61-64 (Apr.-Sept. 1967).

Key words: Generalized inverse: inequality; matrix. The matrix version of Rennie's inequality and the finite- dimensional version of Kantorovich's inequality are obtained by

considering a positive definite matrix and its inverse. Generalizations of these inequalities are obtained in which the inverse matrix is replaced by a generalized inverse with certain prescribed properties. From the generalization of the Kantorovich inequality follows a (finite-dimensional)

generalization of an inequality due to Strang.

Polar factorization of a matrix, J. Z. Hearon, J. Res. NBS

71B2&3-200, pp. 65-67 (Apr.-Sept. 1 967).

Key words: Generalized inverse: matrix: partial isometry.

It is known that if ^ is a bounded linear operator with closed range on a Hilbert space then A can be factored as A=UH. with

U a partial isometry and H nonnegative and self adjoint. For the

finite-dimensional case a strictly matrix-theoretic derivation is given based on the concept of a generalized inverse. Certain

properties of the factors are given as well as conditions under

which H or both U and H are uniquely determined by A. A

pivotal item in the derivation is the representation of a square

partial isometry as the product of a unitary matrix and an

orthogonal projection. This representation is new, of some

interest in itself and greatly simplifies the derivations.

Two classical theorems on commuting matrices, M. Newman, J. Res. NBS 71B2&3-201,pp. 69-71 (Apr.-Sept. 1967).

Key words: Commuting matrices: group representations;

normal matrices: Schur's lemma; simultaneous

triangularization and diagonalization.

Simple proofs are given of the following classical theorems: ( 1

An arbitrary set of commuting matrices may be simultaneously

brought to triangular form by a unitary similarity. (2) An

arbitrary set of commuting normal matrices may be

simultaneously brought to diagonal form by a unitary similarity.

A converse to Banach's contraction theorem, P. R. Meyers, J. Res. NBS 71B2&3-202, pp. 73-76 (Apr.-Sept. 1 967).

Key words: Contractions; functional analysis: metric

spaces; topology.

The class of all continuous self-mappings of a metrizable space which can become contractions (in the sense of Banach) under

metrics compatible with the topology on the space is characterized. The characterization amounts to a converse to the Contraction Mapping Principle.

£-transforms (II), F. M. Ragab, J. Res. NBS 71B2&3-203,

pp. 77-89 (Apr.-Sept. 1967).

Key words:' ^-functions; integral transforms; inversion

formulas; kernels. The following class of integral transform pairs is established

lv — ix,v+ ix, ai , g(x) = j'E\pu. . .,/3,

1\

f(y)dy.

nx) = —\ yg(y)

ITT Jo J ^ (x'!'sin((>'-l-i')7r£:

(1)

(2)

l-v-iy,l3i — v-iy I3q — v — iy:x\

1 — 2iy, ai — v — iy a„ — v — iy / dy.

The kernel in the transform (1 ) is MacRobert's £-function and

integration is performed with respect to the argument of this function. In the inversion formula (2), the kernel is likewise an

£-function. but the integration is performed with respect to its parameters.

Known special cases of this general transform pair is the Kantorovich-Lebedev transforms pair:

2

g(jr) =—X smh (ttx)

TT- Jo y''Ku(y)f(y)dy,

nx)= r KiyMg(y)dy,

Jn

and the generalized Mehler transform pair

^(x) = Jsinh (irxW [\-l<+'x) T Q-A:-«) Pl_,i,(y)f(y)dy.

f{x) = P^],_,„(x)g(y)dy.

Criterion for the stability of numerical integration methods for the solution of systems of differential equations, A. I. A. Karim,

J. Res. NBS 71B2&3-204, pp. 91-103 (Apr.-Sept. 1967).

Key words: Numerical integration; propagation of error;

stability; systems of differential equations.

The problem of studying the growth of the error is most

important for the numerical solution of differential equations. In

this paper the Wilfs criterion is generalized to be applied for systems of differential equations. A general theorem is investigated and regions of stability have to be determined. The

16
use of an electronic computer is more essential for such regions

to be characterized. These regions of stability have the property

that, the error introduced at any stage tends to decay. The

regions of stability for particular numerical methods are

explicitly determined.

Discrete complex functions with prescribed boundary values and

residues, E. L. Peterson, J. Res. NBS 71B2&3-205, pp. 105-

1 10 (Apr. -Sept. 1967).

Key words: Analytic functions; complex analysis; Dirichlet

problem; discrete analytic functions.

R. Isaacs, J. Ferrand, R. J. Duffm, and several others have

developed a function theory for "discrete analytic functions"

defined on "discrete regions" in the "discrete complex plane."

In this paper we bring to light some combinatorial-topological

properties of "simple discrete regions," and we study some basic

properties of discrete analytic functions that are defined on

simple discrete regions. These combinatorial-topological

properties and basic properties are then used to establish an

existence and uniqueness theorem for discrete complex

functions with prescribed "boundary values" and "residues" on

an arbitrary simple discrete region.

Numerical solution of second-order linear difference equations, F. W. J. Olver, y. Res. NBS 71B2&3-206, pp. 111-129 (Apr.-

Sept. 1967).

Key words: Chebyshev series: difference equations; error

analysis; Miller algorithm; recurrence methods; special functions. A new algorithm is given for computing the solution of any

second-order linear difference equation which is applicable when

simple recurrence procedures cannot be used because of

instability. Compared with the well-known Miller algorithm the new method has the advantages of (i) automatically determining

the correct number of recurrence steps, (ii) applying to inhomogeneous difference equations, (iii) enabling more

powerful error analyses to be constructed.

The method is illustrated by numerical computations,

including error analyses, of Anger-Weber, Struve, and Bessel

functions, and the solufion of a differential equation in Chebyshev series.

Indeflnite integrals involving Bessel functions, B. A. Peavy, J. Res. A'55 71B2&3-207,pp. 131-141 (Apr.-Sept. 1967).

Key words: Bessel functions; indefinite integrals.

Expressions are derived for the indefinite integrals,

I

rf{r) Co{ar)dr

I

rf(r) CKarjdr

I

r/(r)C,„(a;-) Co(fir)dr a 7^ (3

I

rf(r)C„{ar)Z„(kr)dr

where Co(ar) are zero order Bessel functions, Zo(^^) are zero

order modified Bessel functions and f(r) is a polynomial in r. In

general, the expressions given for the integrals are given in terms

of prescribed functions of the Bessel functions, and the

coefficients of these functions are determined from a finite series, the terms of which are found from recurrence

relationships that involve only the polynomial /(; ). Coefficients

of the terms of the finite series are given in tabular form for up to an eleventh degree polynomial.

October-December 1967

Calibration designs based on solutions to the tournament problem,

R. C. Bose and J. M. Cameron, ./. Res. NBS 71B4-237, pp. 149-160 (Oct.-Dec. 1967).

Key words: Calibration; calibration designs; combinatorial

analysis; difference sets; incomplete block designs;

statistical experiment designs; tournaments; weighing

designs.

In high precision calibrations one measures differences

between nominally equal objects or group of objects and

establishes a value for the individuals with reference to one or more standards. The solutions to the classical tournament

problem, which calls for arranging r individuals into teams of p

players so that a player is teamed the same number of times with

each of the other players and also that each player is pitted

equally often against each of the other players, provide balanced

designs for scheduling the measurements. These designs are

useful in weighing and other measurements when the objects to be measured can be combined into groups without loss of

precision or accuracy in the comparisons.

This paper presents solutions to the tournament problem for

all i'ssl3 and for p^v/2. The statistical analysis, a worked

example, and computational procedures are given.

Bounds for the solutions of second-order linear difference equations, F. W. J. 01ver,7. Res. A'B5 71B4-238, pp. 161-166

(Oct.-Dec. 1967).

Key words: Chebyshev series; difference equations; error bounds; Miller algorithm; recurrence relations; special functions.

Simple bounds are established for the solutions of secondorder homogeneous linear difference equations in ranges in which the solutions are exponential in character. The results are applied to a recent algorithm for the computation of subdominant

solutions of second-order linear difference equations,

homogeneous or otherwise. Strict and extremely realistic bounds are obtained for the truncation error associated with the

algorithm in a number of examples, including Anger-Weber

functions, Struve functions, and the solution of a differential equation in Chebyshev series.

Notes on automorphic functions: An entire automorphic form of

positive dimension is zero, M. 1. Knopp, J. Res. NBS 71B4-

239, pp. 167-169 (Oct.-Dec. 1967).

Key words: Automorphic forms; discontinuous groups;

Fourier expansion; //-groups.

Several new proofs are given of the fact that an entire automorphic form of positive dimension is zero. The first proof

is modeled on the method used by Hecke to estimate the Fourier

coefficients of cusp forms of negative dimension. The other

proofs involve well-known theorems of complete function

theory.

Solving equations exactly, M. Newman, 7. Res. NBS 71B4-240,

pp. 171-179 (Oct.-Dec. 1967).

Key words: Exact solutions; Hilbert matrices; linear equations; modular arithmetic. A congruential method for finding the exact solution of a system of linear equations with integral coefficients is described,

and complete details of the program are given. Typical

numerical results obtained with an existing program are given as

well.

17
A system of equations having no nontrivial solutions, H. Gupta, 7. Res. /Vfi5 71B4-24l,pp. 1 8

1 -1 82 (Oct.-Dec. 1967).

Key words: Diophantine equations; Prouhet-Terry-Escott

problem; symmetric functions.

The object of this note is to prove the Theorem: The system

of equations

a[+aj+. . . + a;_, = b[+b,^+. . . + b;;_,r= 2, 3, . . n;

has no nontrivial solutions in positive integersRemarks on cut-sets, J. W. Grossman, 7. Res. NBS 71B4-242, pp. 183-186 (Oct.-Dec. 1967).

Key words: Basic cut-sets; cut-sets; graph theory; networt;

flows; mathematics; segs.

This paper gives a theorem on combinations of segs in a finite, connected, undirected graph. Then the theorem is specialized to combinations of cut sets, giving a theorem first proven by

Mayeda. The paper contains an example showing that modifiers

added to Mayeda's theorem by Yau, in the Journal of the Franklin Institute. January 1962, yield a false theorem. Finally, the paper discusses the practicability of algorithms developed by

Mayeda and Yau and based on Mayeda's theorem.

A pseudo primal-dual integer programming algorithm, F. Glover,

J. Res. A'BS71B4-243,pp. 1 87- 1 95 (Oct.-Dec. 1967).

Key words: Gomory algorithm; integer programming; linear

inequalities; maximization.

The Pseudo Primal-Dual Algorithm dolves the pure integer

programming problem in two stages, systematically violating and

restoring dual feasibility while maintaining an all-integer matrix. The algorithm is related to Gomory All-Integer Algorithm and

the Young Primal Integer Programming Algorithm, differing

from the former in the dual feasible stage by the choice of cuts and pivot variable, and from the latter in the dual infeasible stage

by the use of a more rigid (and faster) rule for restoring dual

feasibility.

The net advance in the objective function value produced by

the algorithm between two consecutive stages of dual

infeasibility is shown to be at least as great as that produced by

pivoting with the dual simplex method. Example problems are given that illustrate basic features and variations of the method.

Properties of a useful biorthogonal system, L. V. Spencer and P. Flusser, J. Res. NBS 71B4-244, pp. 197-211 (Oct.-Dec.

1967).

Key words: Biorthogonal functions; gamma-ray penetration

theory; neutron penetration theory; polynomial

approximations.

In radiation penetration theory, infinite medium flux distributions have for some years been calculated using

biorthogonal functions called U,i''{z). In this paper the spaces spanned by these functions, transformation kernels, generating

functions, recursion relations, asymptotic trends for large /;, many expansions, and relations with well-known orthogonal

polynomials are worked out. On even matroids, W. T. Tutte,7. Res. NBS 71B4-245, pp. 213-

214 (Oct.-Dec. 1967).

Key words: Binary; bridge-separable; even; graphic;

matroid.

This article is intended as a supplement to an earlier paper

entitled "Lectures on Matroids."

The author takes this opportunity to correct some errors in "Lectures on Matroids." Theorems 4.31 and 4.372 are valid only for binary matroids, the plane of 4.281 must be connected.

and the word "reductions" is used in 3.48 instead of "contractions."

Matrices of class Jz, J. S. Maybee, J. Res. NBS 71B4-246, { pp. 2 1 5-224 (Oct.-Dec. 1 967).

Key words: Chains; cycles; Jacobi matrices; triple diagonal ; matrices. !

Let Ji be the set of nx n complex matrices A = (Oy) such that

aflj2aj2j3 . . ajrji = 0 for all r such that i^r^n and all distinct ji J-i,

. . .Jr. Then many properties of this set are given, which may be

regarded as generalizations of the properties of the set of triple

diagonal matrices.

Partially isometric matrices, J. Z. Hearon,J. Res. NBS 71B4-247,

pp. 225-228 (Oct.-Dec. 1967).

Key words: Generalized inverse; matrix; partial; isometry.

The complex, not necessarily square matrix A is called a

partial isometry if the vectors .v and Ax have the same Euclidean norm whenever .v is in the orthogonal complement of the null space of A. The main results of the paper give necessary and

sufficient conditions for a matrix to be a partial isometry, for a

partial isometry to be normal and for the product of two partial

isometrics to be a partial isometry. A factorization for an

arbitrary matrix involving partial isometrics is given. The

concept of a generalized inverse is used in establishing the primary results.

Symmetrizable generalized inverses of symmetrizable matrices, J

Z. Hearon, J. Res. NBS 71B4-248, pp. 229-231 (Oct.-Dec.

1967).

Key words: Generalized inverse; symmetrizable matrix.

The matrix A is said to be symmetrizable by V when V is positive definite and /I K is hermitian. Several lemmas regarding

symmetrizability are given. For three classes of generalized

inverses it is shown that if A is symmetrizable by V there exists a

generalized inverse in each class which is symmetrizable by V. The Moore-Penrose inverse (or pseudo-inverse) of a matrix

symmetrizable by V is also symmetrizable by V if and only if the matrix and the pseudo-inverse commute.

Optimum branchings, J. Edmonds, 7. Res. NBS 71B4-249, pp. 233-240 (Oct.-Dec. 1967).

Key words: Algorithms; arborescences; branchings;

combinatorics; graphs; linear programming; traveling

salesman; trees. An arborescence 7" is a tree whose edges are directed so that each is directed toward a different node. Exactly one node of 7,

called the root, has no edge of T directed toward it. Let G be any

directed graph with a real numerical weight on each edge. A

good algorithm is described for finding in G (if there is one) a spanning arborescence. with prescribed root, whose edges have

maximum (or minimum) total weight.

Systems of distinct representatives and linear algebra, J. Edmonds, J. Res. NBS 71B4-250, pp. 241-245 (Oct.-Dec.

1967).

; Key words: Algorithms; combinatorics; indeterminates; t

linear algebra; matroids; systems of distinct representatives;

'

term rank. Some purposes of this paper are: (1) To take seriously the term, "term rank." (2) To make an issue of not "rearranging rows

and columns" by not "arranging" them in the first place. (3) To

promote the numerical use oi" Cramer's rule. (4) To illustrate that the relevance of "number of steps" to "amount of work"

depends on the amount of work in a step. (5) To call attention to the computational aspect of SDR's, an aspect where the subject

differs from being an instance of familiar linear algebra. (6) To

describe an SDR instance of a theory on extremal combinatorics

18
that uses linear algebra in very different ways than does totally

unimodular theory. (The preceding paper. Optimum Branchings,

describes another instance of that theory.)

Bounds for the number of generators of a finite group, M.

Newman, J. Res. NBS 71B4-251, pp. 247-248 (Oct.-Dec.

1967).

Key words: Bounds; elementary abeiian groups; generator

rank; Sylow subgroups.

It is proved that if G is a tlnite group of order n. then the generator rank of G does not exceed the total number of primes

dividing /; and is equal to this number for infinitely many groups

G.

19
3.3. PAPERS FROM THE JOURNAL OF RESEARCH OF THE NATIONAL BUREAU

OF STANDARDS, SECTION C. ENGINEERING AND INSTRUMENTATION,

VOLUME 70C, JULY-DECEMBER 1966

July-September 1966

Some harmonic properties of an oscillating Fabry-Perot

interferometer, M. Gadsden and H. M. Williams, 7. Res. NBS,

70C3-226,pp. 159-163 (July-Sept. 1966).

Key words: Fabry-Perot interferometer; airglow

photometry.

The transmission of a spectral line through an air spaced

Fabry-Perot interferometer is considered. The harmonic

components of the transmission when the spacing of the interferometer is oscillated are discussed and it is found that the components can be used in a servocontrol system to offset drifts in the optical thickness of the interferometer. A possible use of

such a controlled system in observations of the night airglow is discussed.

Precise reflection coefficient measurements with an untuned

reflectometer, W. E. Little and D. A. Ellerbruch,7. Res. NBS,

70C3-227.PP. 165-168 (July-Sept. 1966).

Key words: Microwave; impedance; measurements;

reflectometer. The precision tuned reflectometer technique of reflection coefficient measurement is, at present, the most accurate technique available. Utilization of the technique requires the use

of tuners and sliding terminations to eliminate or reduce the inherent errors of a directional coupler.

This paper describes a reflection coefficient measurement

technique that approaches the accuracy of the tuned

reflectometer. Instead of tuners, the technique uses an ideal one-quarter wavelength waveguide section to eliminate the measurement error introduced by finite directional coupler

directivity and to reduce to second order the error introduced by

an equivalent generator mismatch.

A comparison of the quarter-wave technique with the tuned

reflectometer technique through the measurement of the

reflection coefficient of three 9/16 inch coaxial waveguide

terminations is also included.

A versatile ratio instrument for the high ratio comparison of voltage or resistance, A. E. Hess, J. Res. NBS, 70C3-228, pp. 169-172 (July-Sept. 1966).

Key words: DRRS (direct reading ratio set); junction;

precision measurements; ratio; resistor; four-terminal;

resistance decade; transresistance; URS (universal ratio

set); VERI (versatile ratio instrument).

A 9-dial resistance ratio instrument capable of precise high

ratio comparison of voltage or resistance (from 1/1 to lOVD is described. Also described is the modification of a 6-dial universal ratio set to permit its additional use as a versatile ratio instrument. Paramount to the accuracy of these high ratio instruments is the carefully adjusted "common point" junction

which is briefly discussed.

Console for the rapid and precise comparison of volt boxes, P. H.

Lowrie, Jr., 7. Res. NBS, 70C3-229, pp. 173-185 (July-Sept.

1966).

Key words: Calibration; console; electrical; measurement;

ratio; standards; voltage; volt box.

The comparison of volt boxes within uncertainties of ±0.01

percent or less has, in the past, been a long and difficult task at the NBS Boulder Laboratories. A console for this purpose

recently put in use has reduced the time and labor to a great extent and, at the same time, has reduced the uncertainties

associated with the measurement circuitry to less than 0.001

percent, thus allowing realizable calibration uncertainties of less than 0.005 percent. The console was designed as part of a system in which the operator was considered to be the decisionmaking link in the measurement chain. The circuitry, through

the use of a contained computer and associated circuits, provides

the operator with the data he requires in the form he chooses.

The operator is thus freed from the need to consider minutiae,

and thereby is able to concentrate on those factors requiring

judgment.

Corrosion rates of binary alloys of nickel and iron measured by

polarization methods, W. J. Schwerdtfeger, J. Res. NBS,

70C3-230,pp. 187-194 (Juiy-Sept. 1966).

Key words: Corrosion rates; Ni-Fe alloys; polarization

techniques; polarization rate; polarization resistance; polarization circuits; Ni-Fe pitting.

Specimens of ten binary alloys of nickel and iron containing 3

5, 10, 16, 20, 30, 36, 50, 57, and 81 percent Ni and of the metals

nickel and iron were immersed for 7 months in 265 gallons of city water to which had been added 3 percent by weight of sodium

chloride.

Cathodic and anodic polarization curves of the specimens were obtained at about 22 periodic intervals throughout the exposure period. Corrosion currents, calculated from currents

at breaks in the curves, were converted to corrosion rates expressed as weight losses by applying Faraday's law. The

calculated weight losses were in reasonable agreement with the

actual weight losses. The polarization rates, AK/A/, of the specimens calculated from cathodic polarization curves (cathodic control prevailed) at

several intervals throughout the exposure period were plotted on

logarithmic coordinates with respect to the corrosion current

densities calculated from breaks in the same curves. Similarly,

the averages of these AVIM values were also plotted on

logarithmic coordinates versus the actual corrosion rates expressed as weight losses. Both plots conformed to the

theoretical slope of -1.

The effect of cold-drawing on the creep behavior of a nickel-4.2 percent aluminum alloy, W. D. Jenkins and W. A. Willard, J. Res. NBS. 70C3-231, pp. 195-205 (July-Sept. 1966).

Key words: Cold-drawing; creep; nickel alloys; Duranickel;

nickel-aluminum precipitates; high temperatures;

deformation.

Creep tests were made at 700, 900 and 1200 °F (644, 755 and

921 °K) on a nickel-4.2 percent aluminum alloy (Duranickel)

initially as cold-drawn and as cold-drawn and age-hardened.

Microstructural changes occurring during creep are correlated

20
with the flow, fracture, and ductility of the specimens. Light and

electron microscope observations indicate that increases in creep strength were associated with the formation of rather

straight discontinuous slip bands, a well defined subgrain

structure, small precipitates of NijAl and a general distribution of these precipitates throughout the grains. Creep strength at

1 200 °F was relatively unaffected by prior cold-drawing or aging.

Intercrystalline cracking, accompanied by low ductility, was

evident at 900 and 1200 °F and slow creep rates; whereas

transcrystalline cracking and high ductility values were observed

at 700 °F.

Magnetic transformation and the influence of plastic strain on the shear modulus of Fe-Cr-Ni alloys, R. P. Mikesell and R. P. Reed,y. Res. NBS, 70C3-232, pp. 207-210 (July-Sept. 1966).

Key words: Antiferromagnetic; cold-work; Fe-Ni-Cr

alloys; Neel temperature; shear modulus; stainless steel. The Fe-18Cr-9Ni and Fe-19Cr-9Ni alloys exhibit a decrease

in shear modulus between 76 and 20 °K. Susceptibility

measurements confirm that a paramagnetic to antiferromagnetic

transition occurs at about 40 °K in these alloys. The shear

modulus for the Fe-25Cr-21Ni alfoy did not decrease between

76 and 20 °K which was consistent with the fact that the alloy

remained paramagnetic to 4 °K. The effect of cold-work on the shear modulus above and below the Neel temperature is discussed.

October-December 1966

Some techniques for measuring small mutual inductances, D.N.

Homan, J. Res. NBS, 70C4-233. pp. 221-226 (Oct.-Dec.

1966).

Key words: Auxiliary generator; bridge; coaxial choke;

mutual inductor; stray magnetic field; transformer. A method of measuring small mutual inductances is presented.

The smallest inductor measured was 0.1 ixH. The circuit is a transformer-ratio-arm bridge with multiple balances and is described in detail. Uncertainties are of the order of one part in 10^

Several ideas for the design and construction of suitable mutual inductance standards are presented.

Deflection of centrally loaded thin circular elastic plates on equally

spaced point supports, A. F. Kirstein, W. H. Pell, R. M.

Woolley, and L. J. Davis, 7. Res. NBS, 70C4-234, pp. 227-244

(Oct.-Dec. 1966).

Key words: Bassali's theory; concentric loading; circular

plates; deflection; elasticity; experimental; flexure; point

supports; simplified approximate solutions; thin plates.

Bassali's general theory for the flexure of the thin circular

elastic plate supported at an arbitrary number of points and

subjected to transverse load over an eccentric circle is specialized to the case of a centrally loaded plate supported at points equally spaced on a circle concentric with the center. Simplified methods for approximating the results predicted by

the more complicated theoretical expressions for deflection are presented along with the experimental results from 138 tests. Both the experimental results and the simplified equations are compared with the theory and agreement is found to be good.

Reproducibility of germanium resistance thermometers at 4.2 °K,

M. H. Edlow and H. H. Plumb, J. Res. NBS, 70C4-235, pp. 245-254 (Oct.-Dec. 1966).

Key words: Germanium resistors; germanium resistor reproducibility; low temperature thermometry; reproducibility of germanium resistors; thermal cycling at low

temperature; thermometry.

NBS has needed a set of very reproducible germanium

resistors that would be capable of maintaining temperature

scales. This paper describes our procedure for selecting such a

set.A group of germanium resistors from three commercial

sources have been thermally cycled between 4.2 °K and room

temperature. The resistance-temperature calibrations at 4.2 °K

were made with reference to a liquid helium bath so that reproducible temperatures could be determined from liquid

helium vapor pressure measurements. Seven resistors out of 25

demonstrated reproducibilities (of the 4.2 °K calibration) of

about 0.001 °K after undergoing the multiple cyclings. Guided

by these results, we procured twelve, new, similar resistors which were cycled in a comparable procedure. After 85 cycles,

in which 14 resistance-temperature calibrations were performed

at 4.2 °K for each resistor, 10 of the 12 resistors demonstrated

reproducibilities of approximately 0.001 °K. The resulting set of secondary thermometers have undergone

calibrations in the temperature ranges, 2 to 5 °K and 2 to 20 °K;

reports of this work will be published in the near future.

Calibration of vibrating-sample magnetometers, W. E. Case and

R. D. Harrington, y. Res. NBS, 70C4-236, pp. 255-262 (Oct.- Dec. 1966).

Key words: Ferro- and ferrimagnetism; magnetization;

magnetometer calibration; measurement of magnetization;

saturation magnetization; vibrating-sample magnetometer.

An evaluation of two of the most widely accepted methods for

calibrating vibrating-sample magnetometers is given. The

comparison method uses a material of known magnetization such

as pure nickel. In the slope method, the magnetometer is calibrated from the low field linear slope of the magnetization curve of a sample of high permeability.

The primary source of error in the comparison method arises from an uncertainty in the absolute magnetization of nickel and

its dependence on environmental conditions. The study

indicated that better accuracy can be expected from the slope

method. The use of pure iron in this method was found

preferable to high permeability ferrites.

Notes on the use of propagation of error formulas, H. H. Ku, J. Res. /VB5,70C4-237,pp. 263-273 (Oct.-Dec. 1966).

Key words: Approximation; error; formula; imprecision;

law of error; products; propagation of error; random; rafio; systematic; sum.

The "law of propagation of error" is a tool that physical

scientists have conveniently and frequently used in their work

for many years, yet an adequate reference is difficult to find. In

this paper an expository review of this topic is presented,

particularly in the light of current practices and interpretations.

Examples on the accuracy of the approximations are given. The

reporting of the uncertainties of final results is discussed.

The apparent thermal radiation properties of an isothermal Vgroove with specularly reflecting walls, R. B. Zipin, J. Res. NBS, 70C4-238, pp. 275-280 (Oct.-Dec. 1966).

Key words; Reflectance; specular walls; thermal radiation; V-grooves.

The reflection of a parallel beam of light incident in a V-groove

is treated for the case when the walls are specularly reflecting.

Methods of calculating apparent reflectances and absorptances

are given. Experiments have been performed to test the

theoretical calculations, and the agreement has been found to be

safisfactory.

21
PAPERS FROM THE JOURNAL OF RESEARCH OF THE NATIONAL BUREAU

OF STANDARDS, SECTION C. ENGINEERING AND INSTRUMENTATION,

VOLUME 71C, JANUARY-DECEMBER 1967

January-March 1967

Symmetrical bending of thin circular elastic plates on equally

spaced point supports, A. F. Kirstein and R. M. Woolley, J. Res. A'B5,71Cl-438,pp. 1-10 (Jan.-Mar. 1967).

Key words: Circular plates; concentric loading; design;

elasticity; experiment; maximum stresses; symmetrical

bending; symmetrically distributed load; theory.

A special application of Bassali's solution for transverse

flexure of thin elastic plates supported at several points is presented for the case of symmetrical bending. Equations for moments, shearing forces, and stresses are developed which may

be useful for design purposes. The experimental results although

limited in quantity are in good agreement with the theoretical predictions.

Ultrasonic measurement of cylinder expansion at pressures to 40

kilobars, P. L. M. Heydemann and J. C. Houck,y. Res. NBS,

71CI-439,pp. 11-17 (Jan.-Mar. 1967).

Key words: Compressibility; cylinder distortion; high

pressure; nickel; tellurium; ultrasonics.

For the accurate determination of internal pressures in solidfilled piston and cylinder devices the effective area and its change with pressure are very significant factors. The

computation of the change of area with pressure from elastic theory leads however to considerable uncertainties. The present paper describes how ultrasonic measurements

made in solid-filled piston and cylinder devices to 45 kilobars are combined with measurements of the lengths of the samples as function of pressure and with ultrasonic measurements under

hydrostatic pressure to yield values for cylinder expansion. The

results are compared with values obtained from modified elastic theory.

A comparison of absorbed dose determinations in graphite by

cavity ionization measurements and by calorimetry, B. Petree and P. Lampeni, J. Res. NB^, 71C1-440, pp. 1 9-27 (Jan.-Mar.

1967).

Key words: Absorbed dose; calorimeter; cavity ionization

chamber; cobalt-60 gamma rays; comparison; graphite;

W-s,u. The absorbed dose in graphite from a cobalt-60 gamma-ray

source was measured with a spherical air-filled cavity ionization

chamber and with two spherical calorimeters. The instruments were constructed from high-purity graphite. The current per unit mass of air and the absorbed power per unit mass of graphite were determined with uncertainfies of 0.40 and 0.17 percent

respectively. When the two results are combined the value of

f^air-sin is found to bc 33.72 electron volts in graphite per ion pair

in air, with an uncertainty of ±0. 1 4 electron volts.

Germanium resistance thermometry in the range 2.1 to 5.0 °K, M.

H. Edlow and H. H. Piumb.y. Res. NBS, 71C1-441 , pp. 29-41

(Jan.-Mar 1967).

Key words: Calibration of germanium resistors; germanium

resistors; thermometry.

The resistances of three encapsulated, hermetically sealed,

arsenic-doped germanium resistors from a commercial source have been measured at every 0. 1 °K from 2. 1 to 5.0 °K in highly

stabilized liquid helium baths; values of temperature were

derived from vapor pressure measurements associated with the

liquid bath. Ten similar germanium resistors of common origin have been , calibrated from 2.1 to 5.0 °K in a calibration comparator ! apparatus that is similar to a calorimeter in design. Calibrations were performed against a resistor that had been previously

referenced to temperature through a helium-4 vapor pressure

calibration.

Next, three of the resistors that were calibrated in the comparator apparatus were recalibrated in a liquid helium bath

(at 2.2, 3.0 and 4.2 °K) and results from the two methods agree

within ±1 milli-degree. The resistance-temperature data from

both methods have been fitted to the polynomial equation

III logio/? = 2'4„-(logio7')"

11 = 0

and the results of a computer program, which evaluates the

coefficients, are presented.

Least squares technique for the analysis of periodic temperatures

of the earth's surface region, T. Kusuda, J. Res. NBS, 71C1-

442, pp. 43-50 (Jan.-Mar. 1967).

Key words: Earth temperature; least squares technique;

thermal diffusivity of earth. A least squares technique has been applied to periodic earth temperature data for the purpose of determining basic

characteristics of earth temperature cycles, such as thermal

diffusivity, average temperature, amplitude, and phase angle of

the temperature cycle. A new procedure was developed for obtaining a single thermal diffusivity which represents an

|

average over time and depth at a particular temperature site. This thermal diffusivity was obtained as a nonlinear part of least squares constants which yielded a best-fit harmonic curve to a given set of observed earth temperatures. The thermal

diffusivity thus calculated and the calculation method developed

are preferred to those obtained by current practice, which yields

two thermal diffusivities, one based on amplitude decay and

another on phase angle shift.

A new near-zone electric-field-strength meter, F. M. Greene, J. «e*./VB5,71Cl-443, pp. 5 1-57 (Jan.-Mar. 1967).

Key words: Device, electroexplosive ordnance; field, near- zone electromagnetic; hazards, electromagnetic radiation;

line, nonmetailic electrical transmission; line, semiconducting plastic transmission; meter, electric field-strength;

telemetry, novel form of. The National Bureau of Standards has recently completed the development of prototype instrumentation for measuring the

electric-field components of complex, high-level, near-zone

electromagnetic fields. The instrumentation is intended for use

in evaluating hazards of high-level electromagnetic radiation to electroexplosive ordnance devices at military installations. The iu

22

1
measuring range is from 0.1 to 1000 V per meter, at frequencies

from 150 kHz to 30 MHz, with a present uncertainty of less than

±2dB.

The design of the NBS meters is based on the use of a novel

form of telemetry, which apparently has not been fully exploited

heretofore. This involves the use of a completely nonmetallic

electrical transmission line over which the field information is transmitted from the measuring antenna to a remote readout unit. The line is essentially "transparent" to the field being measured,

and reduces the perturbation of the field two orders of magnitude

below that normally experienced when using a metallic line. The

high r-f line loss involved necessitates miniaturizing the r-f portions of the receiving and calibrating instrumentation and

placing them and their associated battery supplies inside the measuring antenna. The design and performance of the meters

are discussed in some detail.

Inductance and characteristic impedance of a strip-transmission

line, R. L. Brooke, C. A. Hoer, and C. H. Love, 7. Res. NBS,

71C 1-444, pp. 59-67 (Jan.-Mar. 1967).

Key words: Characteristic impedance; inductance; and

strip-transmission lines. A general method is developed for determining the inductance

and characteristic impedance of uniform transmission lines. A

non-uniform current distribution is allowed in the transverse

plane. The system is represented by a matrix equation which can

be programmed for computer solution. The correct inductance

and impedance are obtained as the result of a simple limiting process. The method is applied to one particular geometry, a

four-tape stripline system. Results are given for the inductance,

resistance, and current distribution as functions of frequency and

resistivity for a particular geometry. A method for extending the

results to strip lines with proportional dimensions is developed.

An accuracy of one part in lO^* was found to be feasible for the determination of the inductance per unit length.

Tensor permeability measurements at L-band frequencies using a degenerate mode cavity, L. B. Schmidt, R. D. Harrington, and

W. E. Case, J. Res. NBS, 71C1-445, pp. 69-75 (Jan.-Mar.

1967).

Key words: Degenerate mode cavity: L-band cavity;

polycrystalline garnets; tensor permeability.

The exact solution for the field equations of a cylindrical

TMiio mode cavity has previously allowed accurate measurements of tensor permeability to be obtained at X-band

frequencies. It is demonstrated that this method is also applicable at frequencies down to 1 GHz. A brief description of

the cavity and measurement system for obtaining data at these lower frequencies is given. Both intrinsic and external permeability results on three commercially available

polycrystalline garnets are shown. The larger size rods required

for measurements at these frequencies result in some sample size effects in the data. In addition, a previously unreported

absorption in the external tensor permeability of the materials was observed.

April-June 1967

An apparatus for measuring thermal expansion at elevated temperatures, B. D. Rothrock and R. K. Kirby,y. Res. NBS,

71C2-247, pp. 85-91 (Apr.-June 1967).

Key words: Controlled-gradient vacuum furnace; elevated

temperatures; optical comparator; thermal expansion.

An apparatus has been developed for making precise

measurements of the absolute thermal expansion of refractory

materials at temperatures up to 1600 °C. This apparatus consists

of an optical comparator and a controlled gradient vacuum

furnace. Special care was taken on the techniques of measuring

length and temperature and on the calibration of the microscopes

and thermometers. The expansion data obtained with this apparatus on specimens of platinum and sapphire have a standard deviation of less than 30 ppm and are estimated to be

accurate to within 50 ppm.

Determination and smoothing of Fourier coefTicients representing

piecewise continuous functions, B. A. Peavy, J. Res. NBS,

71C2-248, pp. 93-100 (Apr.-June 1967).

Key words: Continuous function; Fourier series; piecewise;

smoothing.

This paper presents a method of solving for Fourier

coefficients where the dependent variable can be expressed as a piecewise continuous function, when various conditions of

continuity and smoothing are assumed. An example is included

to show the effect of smoothing in the region of a discontinuity

for a system composed of two materials that exhibit a

discontinuity at their interface and surrounded by a third material which does not have a discontinuity. An advantage to be gained from smoothing is an increase in the convergence of a

finite Fourier series representation of a piecewise continuous

function in the region of the discontinuities. A 2:1 ratio inductive voltage divider with less than 0.1 ppm error to

1 MHz, C. A. Hoer and W. L. Smith, 7. Res. NBS. 71C2-249,

pp. 101-109 (Apr.-June 1967).

Key words: Attenuator; bridge; high frequency; inductive

voltage divider; ratio transformer. A simple ratio transformer having a 2:1 ratio of input voltage

to output voltage can be made with a ratio error less than 0.1 ppm from 1 kHz to above 1 MHz. Applications and sources of

error are discussed. Experimental results leading to an optimum

transformer design are given. A bridge to measure the ratio error

to 0.025 ppm from 1 kHz to 1 MHz is also described.

A dual-load flow calorimeter for rf power measurement to 4 GHz,

M. L. Crawford and P. A. Hudson, J. Res. NBS, 71C2-250,

pp. 1 1 1-1 17 (Apr.-June 1967).

Key words: Coaxial; flow calorimeter; radio frequency

power.

A new dual-load flow coaxial calorimeter power meter has

been constructed at the National Bureau of Standards, Boulder

Laboratories. Designed for use as a reference standard, the frequency range of the calorimeter extends up to 4 GHz and

beyond. The power range extends from 2W to lOOW with an

error limit of 0.38 percent.

Design details, error analysis, and results of intercomparison

with other standards are given.

Polymeric materials for dielectric reference specimens, A. H.

Scott and J. R. Kinard, Jr., J. Res. NBS, 71C2-25 1 , pp. 119-

125 (Apr.-June 1967).

Key words: Dielectric constant; dissipation factor; frequency; fluorinated ethylene-propylene; humidity;

polycarbonate; polyethylene; poly( 1 ,4-cyclohexylenedimethylene terephthalate); polystyrene; poly(tetrafluoroethylene): time; reference specimens.

The results from a study of the effects of aging and humidity

change on certain polymer specimens indicate it is possible to

establish stable dielectric reference specimens. Specimens of

polyethylene, polystyrene, polycarbonate, poly(tetrafluoroethylene) (PTFE), fluorinated ethylene-propylene polymer (FEP),

and poly( 1 ,4-cyclohexylenedimethylene terephthalate) were

used in the investigation. Slow changes in the dielectric proper23
ties were observed on some specimens over a period as long as

three years. Very long timed humidity runs indicate PTFE, and

FEP to only a slightly less degree, are best suited for dielectric

reference specimen preparation.

The sensitivity of the Dicke radiometer, D. F. Wait, J. Res. NBS,

71C2-252,pp. 1 27-1 52 (Apr. -June 1967).

Key words: Dicke; microwave; radiometer; sensitivity;

switching.

The literature is reviewed concerning the sensitivity of the Dicke radiometer, excluding gain fluctuations. Discrepancies

are pointed out and a new derivation of sensitivity using a Fourier transform method is used to resolve these discrepancies

and to extend the results to radiometers with lossy switches.

Experimentally it is shown that radiometers using a half-wave

square-law, linear-law, intermediate-law, or envelope detectors

all have a sensitivity equal to the theoretical full-wave square- law detector (within the ±20 percent uncertainty of the experiment).

Sensitivity of a correlation radiometer, J. J. Faris,y. Res. NBS,

71C2-253,pp. 153-170 (Apr.-June 1967).

Key words: Correlation radiometer; differential time delay;

gain fluctuations; imperfect multiplier; noise comparison;

nonidentical amplifiers; sine-wave comparison signal.

The correlation radiometer is analyzed to determine the

sensitivity that can be obtained under various operating

conditions.

The radiometer using a sine wave comparison signal is analyzed and compared with the usual radiometer that employs a random noise for the comparison signal. It is found that the radiometer employing the sine wave comparison signal is the more sensitive of the two circuits, particularly in the case that the

effective temperature of the input noise signal is greater than the

effective input temperature of the amplifiers.

It is shown that if nonidentical amplifiers are used in the correlation circuit, the properties of the radiometer are determined by the portion of the amplifier response functions in the frequency interval that the two response functions overlap.

The effect of amplifier gain fluctuations are considered, and

although the correlation scheme reduces the effect of gain

fluctuations, it is shown that they still do contribute to the output

fluctuations of the radiometer.

Calculations are included showing that the effect of a

differential phase shift between the two channels is a reduction in radiometer sensitivity. The same conclusion is reached

concerning the effect of a differential time delay.

Finally, it is shown that if the comparison signal and the input

signal have the same statistical properties, the requirements on

the multiplier are less stringent than if the two signals have

different statistical properties.

July-September 1967

Procedure for high precision density determinations by hydrostatic

weighing, H. A. Bowman and R. M. Schoonover with

Appendix by M. W. Jones, 7. Res. NBS 71C3-254, pp. 179- 198 (July-Aug. 1967).

Key words: Air density; balance: balance calibration; balance equilibrium; balance sensitivity: density; double

substitution weighing; hydrostatic balance; hydrostatic

weighing; silicon density: substitution balance; volumetric

measurement; water density; water weighing.

There are several simplifications which can be made in the performance of the hydrostatic experiment which lead to more

reproducible results. The operation of single-pan two-knife

balances is discussed, and simple modifications suggested to adapt it to hydrostatic work. A data philosophy is presented

which will be particularly applicable to a generation of nowdeveloping force measuring instruments when used in hydrostatic work. A simplified formula for air density is presented and a formula for estimating day-to-day variability in the density of water. A simple balance calibration procedure is presented in an appendix, and simplified methods of fabricating

suspension wires and degassing sample surfaces are described.

The use of these techniques is illustrated by measurements on

silicon crystals which indicate process reproducibility of a standard deviation to about one part per million.

Study of the storage stability of the barium fluoride film electric hygrometer element, F. E. Jones. 7. Res. NBS 71C3-255, pp. 199-207 (July-Sept. 1967).

Key words: Adsorption; barium fluoride; electric hygrometer: humidity; thin films; vacuum. A study of the aging properties of the barium fluoride film

electric hygrometer element and of possible causes of the drift of

calibration with time in storage has been made. It was found that exposure of aged elements to glow discharge bombardment

resulted in near recovery of the prestorage calibration, indicating

that the calibration drift was not irreversible and providing

insight into the mechanism of aging. Based on the likelihood that aging was due. at least in part, to contamination of the barium

fluoride film, production procedures were formulated which

resulted in elements with significantly reduced drift. If an

adjustment is made similar to the "lock-in" procedure in the operational use of radiosonde humidity elements, then the poststorage resistance values can be adjusted to correspond

closely to the prestorage calibration curves. Experimental

evidence supports the hypothesis that contamination of the elements by diffusion pumping fluid in the production process was a source of the calibration drift. Applications of the element

as a research tool in cloud physics, atmospheric turbulence and

radio refractive index structure studies, evaporation and

evaporation reduction studies, water vapor flux determinations,

and tropospheric humidity distribution studies are mentioned.

Torsion creep of circular and noncircular tubes, L. Mordfin, J. Res. ^55 7103-256. pp. 209-225 (July-Sept. 1967).

Key words: Creep; primary creep: shear; shell; stress analysis: thin wall: torsion; tube. A torsion creep theory for noncircular tubes was developed by

applying a multiaxial creep theory to a derived generalization of

Bredt's equations.

A review of the literature revealed no torsion creep data on

noncircular tubes. Hence, to evaluate the theory, a test program was carried out on twelve specimens of aluminum alloy structural tubing, of four configurations, at 400 °F.

Observed discrepancies between the torsion creep theory and

experiment are smaller than variations in the measured creep

properties of the specimen material from one tube configuration

to another and are not appreciably greater than discrepancies

between elastic torsion theory and experiment. Most of the observed discrepancies are consistent with measured anisotropy

in the tubes, while other discrepancies are ascribed to nonhomogeneity in creep properties and a hydrostatic stress

effect in multiaxial creep.

For the calculation of torsion stresses in circular tubes the

thin-wall approximation is adequate for thickness-to-radius

ratios up to one-tenth. For straight-sided tubes equivalent

accuracy is obtained for effective ratios up to only one-twentieth.

These criteria apply to creep conditions as well as to elastic conditions.

24
Digitized low-frequency phasemeter assembled from logic

modules, J. E. McKinney.y. Res. /Vfi5 71C3-257. pp. 227-238

(July-Sept. 1967).

Key words: Digital; phasemeter; logic circuit; low

frequency; measurements; phase.

A digital phasemeter is described which is capable of operating

from arbitrarily low frequencies to 10 kHz. for which the lower

limit depends essentially upon the time available to the operator

to make the measurement. The phasemeter involves a logic

circuit which can be assembled easily from commercially

available logic modules without the necessity of a proficiency in electronics. The output of the logic circuit is read into a conventional digital preset frequency-ratio meter. The

determination is absolute and utilizes a time base. Accordingly, no calibration against a phase standard is necessary. The

agreement between this phasemeter and a quality phase shifter was found to be within ztO.OT at 400 Hz, which is the accuracy

specified by the manufacturer of the phase shifter. Considerable

ability to ignore signal imperfections is inherent in this device.

October-December 1967

Measurements of the thermal conductivity and electrical resistivity of platinum from 100 to 900 °C, D. R. Flynn and M. E. O'Hagan. J. Res. NBS 71C4-258, pp. 255-284 (Oct.-Dec.

1967).

Key words: Conductivity; electrical conductivity; electrical

resistivity; heat conductivity; Lorenz function; platinum;

reference material; resistivity; standard; thermal

conductivity.

Measurements have been made of the thermal conductivity

and the electrical resistivity of commercial grade platinum

(99.98% pure) in the temperature range 100 to 900 °C. The

measurements have been made with a view to providing accurate

data on the thermal conductivity of platinum to serve as a basis

for establishing platinum as a thermal conductivity standard

reference material. Two methods of measuring the thermal

conductivity have been employed, one an electrical method and

the other a nonelectrical method. In the electrical method, a

direct current passed through a necked-down portion of the specimen and the thermal conductivity was determined in terms

of the temperature and electrical potential distributions in the necked-down region. The second method was of the absolute

guarded longitudinal heat flow type. The experiment was

designed to permit measurements by both methods in the same

apparatus and on the same specimen thereby providing as direct a comparison as possible between the methods. The data given

by the two methods agree within experimental error and show

the thermal conductivity of platinum to be a smoothly increasing

function of temperature in the measured range. Additional

measurements on samples of differing purities are necessary

before platinum could be adopted as a thermal conductivity

reference material.

Thermal conductivity and electrical resistivity of Armco iron, T. W. Watson. D. R. Flynn. and H. E. Robinson. 7. Res. NBS

71C4-259. pp. 285-291 (Oct.-Dec. 1967).

Key words: Armco iron; conductivity; electrical conductivity; electrical resistivity; heat conductivity; heat

transfer; iron; Lorenz function; resistivity; thermal

conductivity.

New data are presented for the thermal conductivity and

electrical resistivity of two samples of Armco iron. On a sample

of material used in a round robin comparison between several

laboratories, thermal conductivity was measured from — 160 to + 640 °C and electrical resistivity was measured from — 1 95 to

+ 1380 °C. On a sample of cold-worked Armco iron from a

different lot, data are reported from - 1 50 to + 200 °C.

Heat flow in a right circular cylinder with internal heat generation:

Applications to the determination of thermal conductivity, D. R. Flynn. 7. Res. NBS 71C4-260. pp. 293-298 (Oct.-Dec. 1967).

Key words: Heat conduction: heat generation: heat

transfer; neutron absorption; radioactive decay: thermal

conductivity.

Expressions are developed which permit calculation of the temperature-dependent thermal conductivity of a cylindrical

specimen in which heat is generated internally, e.g., by

radioactive decay. The information needed consists of the experimentally determined temperature distributions on the surfaces of the cylinder, the heat flow through a central circular area at one end of the cylinder, and the rate of internal heat generation (which in general may be position-dependent).

Numerical coefficients are tabulated for the case of uniform

internal heat generation. The application of this calculation

procedure to published methods of thermal conductivity

determination is shown and an example is given.

Radiation-induced acoustic cavitation: Apparatus and some

results, M. Greenspan and C. E. Tschiegg, 7. Res. NBS 71C4-

26 1 , pp. 299-3 1 2 (Oct.-Dec. 1 967).

Key words: Acoustic cavitation; alpha-particle-induced

cavitation: cavitation; cavitation nucleus: cavitation threshold; fission-induced cavitation; neutron-induced

cavitation: radiation-induced cavitation: threshold.

Equipment and techniques for acoustic cavitation work are described. The test liquid and its container form part of a self- sustaining programmable oscillator. Emphasis is laid on the treatment of the liquid necessary to yield reproducible results

after artificial nucleation, especially by neutrons, a-recoils, and

fission. With neutrons, for instance, the cavitation rate rises rapidly with acoustic (negative) pressure, and at fixed pressure is proportional to neutron flux. The cavitation events are random,

and no appreciable induction or decay times are observed. Each

cavitation arises from the action of a single neutron (or a-recoil. or fission). The cavitation "threshold" (roughly negative pressure below which cavitation is rare) is highly variable from

liquid to liquid. Thresholds at about room temperature for

liquids irradiated with 10 MeV neutrons ranged from 1 to 2 bars

for /;-pentane. ether, and freon I 1 3 to over 50 bars for water.

Design of a new Kossel pattern generator, D. L. Vieth and H.

Yakowitz. J. Res. NBS 71C4-262, pp. 313-318 (Oct.-Dec.

1967).

Key words: Divergent x-ray beam: instrument design:

Kossel camera; Kossel method; x-ray instrumentation.

A Kossel pattern generator, designed and built at the National Bureau of Standards, is described in detail. The unit is modular

and consists of an electron beam column, vacuum system, light

microscope, film cassette, and Kossel camera. The camera component includes microgoniometric capabilities. The-Kossel

x-ray technique enables the investigator to obtain lattice spacing

data precise to two or three parts per million, and orientation of

crystals to 0.1° of arc. The Kossel pattern generator described

permits data for such determinations to be obtained quickly and

precisely.

The near-zone magnetic field of a small circular-loop antenna, F. M. Greene, J. Res. NBS 71C4-263, pp. 319-326 (Oct.-Dec.

1967).

Key words: Loop-antenna field strength; magnetic field- strength standard: mutual inductance of coaxial circular filaments; near-zone magnetic field; transmitting loop

antenna.

313-589 0-69—

25
An improved formula is derived for accurately computing the near-zone magnetic field of a small circular transmitting loop

antenna. Such a field can serve as a reference standard for calibrating field-strength meters employing small receiving loop antennas in the frequency range 30 Hz to 30 MHz.

This formula includes correction terms for frequency (due to the finite time of propagation), as well as corrections for the finite

radii of both the transmitting and receiving loops. Other

formulas appearing in the literature often fail to include such

corrections which can result in errors of up to 20 percent and more in computing standard-field values. The NBS formula is derived by expanding the integrand of the retarded vector potential into an infinite series of spherical

Hankel functions of increasing order. The resulting series expression is in error by less than 0.2 percent, is rapidly

converging and simple to use without recourse to a table of

functions or a computer.

26
3.4. MONOGRAPHS

Monographs are usually contributions to the technical

literature which are too lengthy for publication in the Journal of

Research. They often provide extensive compilations of

information on subjects related to the Bureau's technical program. Until July 1959 most of this type of material was

published in the Circular series. See "Price List of Available

Publications", page 102.

Mono. 25, Section 5. Standard x-ray diffraction powder patterns.

Section 5.-Data for 80 substances, H. E. Swanson, H. F. McMurdie, M. C. Morris, and E. H. Evans, NBS Mono. 25,

Section 5 (Aug. 3 1 , 1967).

Key words: Constants; crystal; lattice; measurements;

powder-patterns; reference-intensities; standard; structure; x-ray diffraction.

Standard x-ray diffraction powder patterns are presented for 80 substances. Thirty-nine of these patterns represent

experimental data and 41 are calculated. The experimental x-ray powder diffraction patterns are made with a Geiger counter x- ray diffractometer, using samples of high purity. All d-values were assigned Miller indices determined by comparison with

theoretical interplanar spacings and from consideration of space

group extinctions. The densities and lattice constants were

calculated, and the refractive indices were measured whenever

possible. The calculated x-ray powder diffraction patterns were

obtained from published crystal structure data. The reported

peak height intensities for calculated patterns were converted

from integrated intensities.

Reference intensity values based upon the strongest line of

corundum (1 13) in a 50 percent weight mixture are given for 73

materials.

Mono. 27, Supplement 2. Bibliography of temperature

measurement, July 1960 to December 1965, L. O. Olsen and C. Halpern, NBS Mono. 27, Suppl. 2 (April 28, 1967).

Key words: Temperature; thermometry; thermocouples;

thermistors; resistance thermometer; and radiation pyrometry.

There are presented in this supplement to NBS Monograph

27, "Bibliography of Temperature Measurement, January 1953

to June 1960" issued April 6, 1961, about 1700 additional references to the field of temperature measurement. (Supplement 2 also embraces the data presented in Supplement

1.) The period covered is from July 1960 to December 1965. With the exception of Part 1 which has been changed to include

theory; calibration and temperature scales, the arrangement of

material is the same as in Monograph 27. The journal

abbreviations used are those employed in Chemical Abstracts. (Supersedes Supplement 1 to NBS Mono. 27.)

Mono. 32, Supplement. Revision of the NBS tables of spectral-line

intensities below 2450 A, C. H. Corliss, NBS Mono. 32, Suppl.

(July 7, 1967).

Key words: Atomic spectra; intensities; spectral lines; ultraviolet. A calibration is applied to the intensity measurements of the 1400 lines below 2450 A in the NBS Tables of Spectral-Line

Intensities. Tables of the new values are presented with the lines arranged by elements and by wavelengths.

Mono. 35, Supplement 1 . Bibliography and index on vacuum and

low pressure measurement, .January 1960 to December 1965, W.

G. Brombacher, NBS Mono. 35, Suppl. 1 (May 31, 1967).

Key words: Bibliography; low pressure measurement;

techniques of vacuum measurement; vacuum index; vacuum measurement.

The bibliography, a supplement to NBS Monograph 35, of the same title, covers the years 1960 to 1965, inclusive, and includes

109 references for prior years not listed in Monograph 35. It contains 1787 references, 38 of which are to books. The

references, besides those directly concerned with pressure measurement, include those on vacuum technology which may

bear on the technique of vacuum m.easurement, such as on

adsorption and desorption, diffusion of gases into solids, gas conductance and hardware such as pumps, seals and traps. Author and subject indices are provided.

Mono. 61. The solar spectrum 2935 A to 8770 A. Second revision of Rowland's preliminary table of solar spectrum wavelengths, C. E. Moore, M. G. J. Minnaert, and J. Houtgast.NBS Mono.

61 (Dec. 1966).

Key words: Elements in sun; equivalent widths of solar

lines; identification of solar lines; molecules in sun; solar spectrum; wavelengths of solar lines. The present compendium of solar spectrum wavelengths and

intensities is essentially a second revision of Rowland's Table,

corrected and supplemented by material from the Utrecht

Photometric Atlas. Approximately 24,000 li nes are listed, in a number of cases new wavelengths were determined. Measured

equivalent widths from the Atlas records replace the Rowland

estimated line intensities recorded in the 1928 revision. From

these directly measured equivalent widths have been derived

reduced widths, which, if necessary, were corrected for disturbing influences. The intensity behavior of atomic lines in the spot spectrum as compared with the spectrum of the solar disk is indicated by letters denoting strengthening, weakening,

and the like. Atomic lines present only in the spot spectrum are,

also, included, 223 in all.

Revised identifications of the lines, as to chemical origin, are given for both atomic and molecular lines. For classified atomic

lines the lower excitation potential and multiplet number are

listed. For molecular lines the rotation branch and quantum

number, and the vibration band are indicated. Note numbers

refer to notes in v/hich the complete designation of the band is given.

An introductory text gives a detailed description of each

column of the solar ledger. Figures are included to illustrate the procedure used to derive the observed equivalent widths

A.\(mA) and the reduced widths AX/\(F).

Tables include counts of lines of each spectrum recorded in the identification column, leading lines in the first and second

spectra, and summaries of molecules and elements present in the

sun. About 73 percent of the lines are wholly or partially

identified. Sixty-three elements are recorded as present. A

number need further study. The number of molecules identified

in the sun totals 1 1.

Mono. 75. Colors of signal lights: Their selection, definition,

measurement, production, and use, F. C. Breckenridge, NBS

Mono. 75 (Apr. 3, 1967).

Key words: Colors; lights; signal lights.

27
This Monograph is intended to serve as a reference wori< for

all those concerned with the selection, specifications, and use of

signal-light colors. It discusses the nature of the problem, and

the mathematical representation, recognition, production,

control, and use of such colors. The characteristics of different types of chromaticity boundaries and the purpose and effect of

the requirement for similarity of chromaticity characteristics are given special consideration. The treatment is varied according to the intended use. The discussion of the control of colors and the

section on the use of colors are nontechnical, whereas the section on the production of signal colors is designed for the colorimetrist who is faced with the problem of selecting limit

filters or drafting a specification.

Mono. 88. Heat treatment and properties of iron and steel, T. G.

Digges, S. J. Rosenberg, and G. W. Geil, NBS Mono. 88

(Nov. 1, 1966).

Key words: Annealing; case hardening; chemical

composition; hardening; heat treatment; Ni-maraging steels; normalizing; stainless steels; structural steels; surface hardening; tempering; tool steels.

This Monograph is a revision of the previous NBS Monograph

18. Its purpose is to provide an understanding of the heat treatment of iron and steels, principally to those unacquainted

with this subject. The basic principles involved in the heat treatment of these materials are presented in simplified form.

General heat treatment procedures are given for annealing,

normalizing, hardening, tempering, case hardening, surface hardening, and special treatments such as austempering,

ausforming, martempering and cold treatment. Chemical

compositions, heat treatments, and some properties and uses are presented for structural steels, tool steels, stainless and heatresisting steels, precipitation-hardenable stainless steels and

nickel-maraging steels. (Supersedes NBS Circ. 495 and NBS

Mono. 18).

Mono. 97. Microwave attenuation measurements and standards,

R. W. Beatty. NBS Mono. 97 (Apr. 3, 1967).

Key words: Microwave; attenuation; measurements;

standards; tutorial. A comprehensive and commentarial review of microwave

attenuation measurement methods and standards is presented.

In addition, a relatively new and more precise way of

representing and analyzing an attenuation measurement is presented. This in turn permits more rigorous definitions and

error analyses than were previously possible. Expressions for both mismatch and connector errors are presented.

The referral of microwave attenuation measurements to standards operating at lower frequencies is discussed with

particular attention to the errors in the referral processes as well

as the errors in the standards themselves. Standards operating at d-c, audio frequencies, and higher frequencies are included in this discussion which covers waveguide-below-cutoff

attenuators and rotary vane attenuators.

Desirable characteristics are listed for attenuators which are

suitable for calibration, and examples of these are given.

Measurement methods are classified and described, giving

greatest emphasis to the intermediate-frequency substitution method using a waveguide-below-cutoff standard attenuator, and

to d-c substitution techniques. Methods for measurement of

small attenuations as well as methods not requiring reference to any standard attenuators are covered.

Comments are made on the accuracy and convenience of

various methods, and references are given which cover most of

the basic and important research in this field.

Mono. 98. Abscissas and weiglits for Gaussian Quadrature for N=2 to 100, and N=125, 150, 175, and 200, C. H. Love, NBS

Mono. 98 (Dec. 28, 1966).

Key words: Integration; Gaussian; Quadrature.

The abscissas and weights for Gaussian Quadrature of order

N=2 to 100 and N=125, 150, 175 and 200 are given. The

abscissas are given to twenty-four places and the error is estimated to be no more than one unit in the last place. The

weights are given to twenty-three places and the error is estimated to be no more than one unit in the last place.

Mono. 99. Automatic typograpliic-quality typesetting techniques:

A state-of-tlie-art review, M. E. Stevens and J. L. Little, NBS

Mono. 99 (Apr. 7, 1967).

Key words: Automated type composition; computerized

typesetting; graphic arts; photocomposition; printing and

publication.

This report describes the current state-of-the-art in automation

of graphic arts composition, starting from either of two sources:

(1) keyboard entry of manuscript material, or (2) mechanized

input in the form of available perforated tapes or magnetic tapes.

The gamut is covered from one extreme in which a skilled keyboard operator performs all of the compositor functions

required to operate a typesetting machine, to the other extreme

in which the input merely provides text whether or not including

designation of desired font changes, followed by a high degree of

automation through all operations leading to type set for printing.

Intermediate automation aids for the compositor functions,

including characteristics of special-purpose digital computers

and functions performed by typography programs for generalpurpose digital computers, are reviewed.

Characteristics of automatically operated typesetting

mechanisms, including hot metal casting machines and

photocomposers, slow, medium and high speed, are outlined. Applications of new techniques for typographic-quality

automated composition that are of interest in scientific and

technical information centers, libraries and other documentation

operations include sequential card camera listings, computergenerated KWIC indexes, photocomposition of technical

journals, automatic composition of books containing both

computer-produced tabular data and natural language texts, and

the incorporation of mechanized processes throughout the publication cycle from the author's original manuscript

preparation to the final printing. A bibliography of 363

references is included.

Mono. 100. Trace characterization. Cliemical and physical.

Editors, W. W. Meinke and B. P. Scribner, NBS Mono. 100

(April 28, 1967).

Key words; Electrochemical methods; electron and optical

microscopy; nuclear methods; optical spectroscopy;

symposium on trace characterization; trace characterization; x-ray spectroscopy.

A symposium on Trace Characterization, Chemical and

Physical was held at the National Bureau of Standards October

3-7, 1966. This volume contains the texts of invited lectures,

and summaries by the rapporteurs of the contributed papers and

discussion sessions. Topics covered include trace characterization and the properties of materials; electrical measurements; electrochemical methods; optical and x-ray spectroscopy; x-ray diffraction; optical methods; chemical

spectrophotometry; nuclear methods; mass spectroscopy;

preconcentration; sampling and reagents; and electron and

optical microscopy.

28
Mono. 101. Low-temperature mechanical properties of copper

and selected copper alloys. A compilation from the literature, R.

P. Reed and R. P. Mikesell,NBS Mono. 101 (Dec. 1, 1967).

Key words: Compilation; copper; copper alloys; low

temperature; mechanical properties.

In the past 60 years considerable data has accumulated

concerning the mechanical properties of copper and its alloys. It was felt that there was a great need to adequately document

these results in one publication. Therefore a unique type of

compilation is presented. The compilation is divided into four

parts. The first section is intended for quick reference use for those who are interested in average values. The second section

includes data from most of the investigators who have published

results on the mechanical properties of copper and its alloys.

The third section is composed of tables classifying the investigations which were not included in section two. These

usually involve investigations in which data were obtained only

at one temperature, such as room temperature. The fourth

section lists, in alphabetical order, all references used.

Mono. 102. Effects of finite lattice heat capacity on spin-lattice relaxation. Theory and numerical analysis, R. L. Peterson,

NBS Mono. 102 (Aug. 1, 1967).

Key words: Spin-lattice relaxation; phonon bottleneck; phonon-boundary scattering; spin-phonon interactions. The transient magnetic behavior of a paramagnetic substance,

after an initial disturbance, is considered theoretically for a

variety of situations in which the lattice temperature rises as a

result of energy flow from the magnetic (electron spin) system.

The relaxation mechanisms considered are the direct process, involving interaction between spins and the resonant-phonon

modes, and a T'* Raman process, involving the remaining phonon

modes. It is first assumed that the resonant and remaining

modes are strongly coupled to each other, and that the helium

bath has been removed (helium temperatures are assumed). The

resulting transient behavior typically does not differ much from

exponential relaxation (the rate increases somewhat during the

relaxation), but the difference should be experimentally

observable, particularly if the resonance line is inverted initially.

Next, the opposite extreme is considered—that in which the resonant and remaining modes are totally uncoupled; the helium

bath is again assumed to have been removed. Two dramatic

effects can then occur, depending upon initial conditions. One is the rapid decay to saturation from initial inversion, due to an

avalanching creation of resonant phonons by the spins. The

second is the pronounced inhibition of the subsequent decay,

with the spins remaining near saturation. This decay rate is typically very much slower than the Raman rate, and is due to the flow of the resonant-phonon energy back into the spin system

as the spin energy flows into the remaining lattice. Eventually

the rate increases to the Raman rate characteristic of the final lattice temperature. Because of inelastic phonon scattering at crystal boundaries, which couples the phonon modes together,

this effect of inhibited decay may be difficult to observe.

Finally, we consider the case of spins coupled only to the resonant phonons, which in turn are coupled to a constant temperature bath, whether this be the helium or the remaining

modes. Recent phonon avalanche experiments are discussed in

this context. It is pointed out that such experiments, performed

in the absence of a bath, may provide a reliable measurement of

inelastic phonon-boundary scattering.

Mono. 103. Realistic uncertainties and the mass measurement

process. An illustrated review, P. E. Pontius and J. M.

Cameron, NBS Mono. 103 (Aug. 15,1967).

Key words: Accuracy; mass measurement; measurement;

measurement process; precision; statistical control; uncertainty.

This paper gives a review of the concepts and operations

involved in measuring the mass of an object. The importance of

viewing measurement as a production process is emphasized and

methods of evaluating process parameters are presented. The

use of one of the laboratory's standards as an additional unknown in routine calibration provides an accuracy check and,

as time goes on, the basis for precision and accuracy statements.

29
3.5. HANDBOOKS

These are recommended codes of engineering and industrial practice, including safety codes, developed in cooperation with

the national organizations and others concerned. In many cases

the recommended requirements are given official status through

their incorporation in local ordinances by State and municipal

regulatory bodies. See "Price List of Available Publications",

page 104.

H102. ASTM metric practice guide, NBS Handb. 102 (March 10,

1967).

Key words: Metric system; international system (SI); conversion factors. This Handbook, prepared by the ASTM Ad Hoc Committee

on Metric Practice, is intended to assist persons confronted with

the task of conversion between U. S. customary units and SI

(metric) units.

Rules for conversion and rounding are explained in detail, and

an extensive list of factors for conversion is included. A brief history of the development of SI is presented.

H103. Tabulation of data on receiving tubes, J. K. Moffitt, NBS

Handb. 103 (Sept. 29, 1967).

Key words: Basing connections; characteristics; electron

tubes; similar types; tabulation. A tabulation of Receiving-Type Electron Tubes with some

characteristics of each type has been prepared in the form of two

major listings, a Numerical Listing in which the tubes are arranged by type number, and a Characteristic Listing in which

the tubes are arranged by tube type and further ordered on the basis of one or two important parameters. The tabulation is accompanied by a listing of similar tube types and basing

connections for the listed tubes. (Supersedes Handbook 83).

H104. Tabulation of data on microwave tubes, J. K. Moffitt, NBS

Handb. 104 (Sept. 29, 1967).

Key words: Characteristics tabulation; electron tubes; microwave electron tubes; tabulation. A tabulation of microwave electron tubes with characteristics of each type has been arranged in the form of two major listings, a Numerical Listing in which the tubes are arranged by type

number, and a Characteristic Listing in which the tubes are arranged by the kind of tube, and further ordered on the basis of

minimum frequency and power output. (Supersedes NBS

Handbook 70).

30
3.6. MISCELLANEOUS PUBLICATIONS

As the name implies, this series includes material which,

because of its character or because of its size, does not fit into any of the other regular publication series. Some of these are

charts, administrative pamphlets. Annual Reports, Weights and

Measures Conference Reports, and other subjects appropriate to the Miscellaneous series. See "Price List of Available

Publications", page 103.

M236, 1967 Edition. Services provided by NBS standard

frequency stations WWV, WWVH, WWVB, and WWVL, NBS

Misc. Publ. 236, 1967 Edition (1967).

Key words: Broadcast of standard frequencies: high

frequency; low frequency: standard frequencies: time

signals; very low frequency.

Detailed descriptions are given of eight technical services

provided by the National Bureau of Standards radio stations WWV, WWVH, WWVB, and WWVL. These services are: 1. Standard radio frequencies; 2. Standard audio frequencies; 3. Standard musical pitch; 4. Standard time intervals: 5. Times

signals; 6. UT2 corrections; 7. Radio propagation forecasts; and

8. Geophysical alerts. In order to provide users with the best possible services, occasional changes in the broadcasting

schedules are required. This publication shows the schedules in effect on June 1, 1967. Annual revisions will be made. Advance

notices of changes occurring between revisions will be sent to regular users of these services upon request. Current data

relating to standard frequencies and time signals are also available monthly in the Time and Frequency Services Bulletin. (Supersedes Misc. Publ. 236, 1966 Edition).

M260, 1967 Edition. Standard reference materials: Catalog and

price list of standard materials issued by the National Bureau of Standards, NBS Misc. Publ. 260 (Sept. 15, 1967).

Key words: Analysis; catalog; certificate; characterization;

composition; price list; property of material; purity of

material; standard reference materials; standards.

This catalog describes the various Standard Reference

Materials issued by the National Bureau of Standards. These

materials are used to calibrate measurement systems and provide

scientific information that can be referred to a common base. A

schedule of prices and quantities is included for each material, as

well as directions for ordering. Listed are the types and

compositions of those chemical standards that are presently

available. Announcements of new standard reference materials

are made in the Federal Register, in scientific and trade journals,

and in the Technical News Bulletin of the National Bureau of

Standards. Changes affecting the current status of the various

standards will be indicated by an insert sheet available quarterly

from the Bureau. (Supersedes NBS Misc. Publ. 260-1965

Edition).

M260-11. Standard reference materials: Viscosity of a standard

lead-silica glass, A. Napolitano and E. G. Hawkins, NBS Misc.

Publ. 260-11 (Nov. 7, 1966).

Key words: Beam bending; fiber elongation; glass; glass standard; glass viscosity; lead-silica glass; restrained

sphere; rotating cylinders; standard; standard reference

material; viscosity; viscosity standard. The viscosity of a lead-silica glass has been measured at the National Bureau of Standards and seven other laboratories. Determinations were made in the range of 10- to lO''' poises

(1350-400 °C). Measurements were made by the rotating

cylinder, restrained sphere, fiber-elongation, and beam-bending

methods. The results have been critically evaluated and the glass has been issued as Standard Reference Material No. 711.

M260-I2. Standard reference materials: Homogeneity

characterization of NBS spectrometric standards III: White cast iron and stainless steel powder compact, H. Yakowitz, D. L. Vieth, R. E. Michaelis, NBS Misc. Publ. 260-12 (Sept. 19, 1966).

Key words: Microanalytical techniques; solids mass

spectrometer; electron probe microanalyzer; NBS white

cast iron sample (SRM 1175); stainless steel powder

metallurgy compact; optical metallography; macroanalytical

techniques; optical emission: x-ray spectrochemical

analysis..

This paper describes a continuation of the NBS effort to characterize metal materials as to their suitability for use in calibrating microanalytical techniques such as the solids mass

spectrometer and, especially, the electron probe microanalyzer

An NBS white cast iron sample (SRM 1175) and a specially

prepared stainless steel powder metallurgy compact have been

investigated by means of electron probe microanalysis and

optical metallography. Results for six elements in the cast iron and three in the stainless steel are given. It is concluded that neither of these materials is suitable for use for calibration in microanalytical techniques. It is emphasized, however, that this

in no way affects the usefulness of the white cast iron material

for macroanalytical techniques such as optical emission and x- ray spectrochemical analysis.

M260-13. Standard reference materials: Mossbauer spectroscopy

standard for the chemical shift of iron compounds, J. J. Spijkerman, D. K. Snediker, F. C. Ruegg, and J. R. DeVoe,

NBS Misc. Publ. 260-13 (July 28, 1967).

Key words: Mossbauer; spectroscopy; standard;

differential chemical shift; quadrupole splitting; random

error; systematic error; sodium nitroprusside; iron compounds; optical Mossbauer spectrometer; tandem

Mossbauer spectrometer; velocity calibration. The preparation, calibration, and use of the Standard

Reference Material for chemical shift of iron compounds in Mossbauer Spectroscopy is described. This standard is a properly oriented single crystal of sodium pentacyanonitrosylferrate

(II) dihydrate (sodium nitroprusside). Primary standards were calibrated with a high accuracy optical Mossbauer

spectrometer and secondary calibrations were made with a tandem Mossbauer spectrometer. The midpoint between the two absorption peaks in the spectrum at 25.0 °C provide a useful velocity scale calibration of the spectrometer. Descriptions of

the spectrometers used and the error analysis associated with the data are given. Suggested format for reporting Mossbauer

spectra and their parameters is also presented.

M260-14. Standard reference materials: Determination of oxygen

in ferrous materials, SRM 1090, 1091 and 1092, O. Menis and J. T. Steriing, NBS Misc. Publ. 260-14 (Sept. 23, 1966).

Key words: Vacuum fusion; inert gas fusion; oxygen;

ferrous standard reference materials; CO by infrared absorbancy; homogeneity; certified value; eighteen

cooperating laboratories. A description is presented of methods used for the

31
determination of homogeneity and the establishment of the oxygen values certified by NBS for three ferrous standard

reference materials. These standards are represented by two low

alloy materials, ingot and vacuum melted iron containing 484 and

28 ppm of oxygen respectively, and a high alloy steel containing

131 ppm of oxygen. The analyses of these materials are based on two vacuum fusion procedures. The poor results for the high

alloy steel obtained by the first of these methods are explained.

The first method is based on manometric measurements and

depends on the conversion of CO to CO> by copper oxide and on

a differential freezing of gases. In the second method a system is used which provides a highly efficient degassing of sample and a direct measurement of CO by infrared absorbancy. Additional

data from an analysis by inert gas fusion method also indicate

that the homogeneity of a single rod of ingot iron, over a wide

range of sample size, has a relative standard deviation of less than two per cent. From control data and homogeneity studies it was ascertained that the uncertainty limits stated in the NBS

certificate include the error due to the relative inhomogeneity

between rods. Finally, data from eighteen laboratories

cooperating in this program are presented.

M260- 1 5. Standard reference materials: Recommended method of

use of standard light-sensitive paper for calibrating carbon arcs used in testing textiles for colorfastness to light, E. Passaglia and

P.J. ShouscNBS Misc. Publ. 260-15 (July 21, 1967).

Key words: Light-sensitive paper; booklets of faded strips;

fading characteristics; textiles; fading standardization.

The use of NBS Light-Sensitive Paper and NBS Booklets of

Standard Faded Strips in the standardization of fading lamps is described. These lamps are used to determine the fading

characteristics of textiles, and the light-sensitive paper is thus

useful in standardizing this procedure.

M262-2. Legibility of alphanumeric characters and other symbols: IL A reference handbook, D. Y. Cornog and F. C. Rose, NBS

Misc. Publ. 262-2 (Feb. 10, 1967).

Key words: Alphanumeric characters; displays; handbook;

human factors; legibility; psychology; readability;

standards; symbols; type faces; typography; visibility.

The major psychological findings and data in the field of the

legibility of alphanumeric characters and other symbols are provided in this detailed Reference Handbook. Summaries and

extracts of information for 203 experimental, developmental,

review, and other legibility reports are presented and are multiply indexed in depth by (1) a matrix, cross-reference index

(article versus functional variables - environmental

typographical), (2) .author indexes (alphabetical and

chronological), and (3) a character-face-name index. These

Handbook entries are further indexed by the permuted title index in NBS Miscellaneous Publication No. 262-1, "Legibility

of Alphanumeric Characters and Other Symbols: I. A Permuted

Title Index and Bibliography." Selected samples of several important experimental and other faces are presented in an

appendix.

M273. Critical phenomena. Proceedings of a conference,

Washington, D.C., April 1965, Editors, M. S. Green and J. V.

Sengers, NBS Misc. Publ. 273 (Dec. 1 , 1966).

Key words: Critical phenomena; critical point; second order

phase transition; singularities; Pade approximate

fluctuations; opalescence; X-transitions. A conference on Critical Phenomena was held at the National

Bureau of Standards, April 5-8, 1965. This volume contains 30

of the papers included in the program, together with the discussions which followed oral presentation. Topics covered

include equilibrium critical phenomena in fluids, critical

phenomena in ferro- and antiferromagnets, logarithmic

singularities in specific heats, elastic, and inelastic scattering,

and transport and relaxation phenomena in the critical region.

M277, Supplement 1. Photonuclear data index, NBS Misc. Publ. 277, Supplement 1 (Oct. 1967).

Key words: Bibliography; data index; elements; isotopes;

nuclear physics; photonuclear reactions.

This index, a supplement to NBS Miscellaneous Publication

277, primarily covers data published in the period dated January

1 , 1 965 through the middle of April 1 967. Organized by element

and isotope, each entry in the index supplies quantitative

information for a specific reaction on the ranges of excitation energy, source energy, detected particle energy, and emission

angles for reaction produced covered in each reference. Infor- mation is also given on the type of measurement and detector

used.

M280. Hydraulic research in the United States, 1966, Editors, H.

K. Middleton and G. Kulin, NBS Misc. Publ. 280 (Sept. 8, 1966) . Key words: Hydraulic; hydrology; naval hydrodynamics.

Research and development projects being conducted in 1966

in hydraulic and hydrologic laboratories of universities and

Federal agencies throughout the United States and Canada are

briefly described. A list of the contributing laboratories is given.

The status of continuing projects covered by previous issues of

the publication is reported upon, as well as on new projects in progress, the results of completed work are given. References to publications relating to the projects and an extensive subject

index are included.

M281. Bibliography on flame spectroscopy. Analytical

applications, 1800-1966, R. Mavrodineanu, NBS Misc. Publ. 281 (Feb. 23, 1967).

Key words: Flame; spectroscopy; analytical emission;

atomic absorption; electrical discharge; bibliography;

indexed.

Flame spectroscopy, especially in its analytical applications,

continues to be an active field of study. Its literature is growing

steadily, and the use of flame photometry in many specialized

applications calls for a comprehensive indexed bibliography.

This collection consists of 5,113 references to works on flame

spectroscopy, selected with emphasis toward analytical

measurements. It covers the period from 1800 to 1966. Subject

indexes, keyed by number to the references cited, precede most

of the sections.

M282. National Bureau of Standards Brochure, 1966, NBS Misc.

Publ. 282 (Nov. 1966).

Key words: Engineering measurements and standards; measurement standards: properties of matter and materials. An attractive, easy to read account of the current activities of

the National Bureau of Standards. The brochure discusses the primary activities of the Bureau - basic measurement standards,

properties of matter and materials, engineering measurements

and standards - and provides interesting background on NBS

technical assistance and services, NBS staff and recent accomplishments.

M283. Technical highlights of the National Bureau of Standards,

Annual Report Fiscal Year 1966, NBS Misc. Publ. 283 (Apr.

1967) . Key words: Annual report; technical highlights.

This is an illustrated digest of NBS technical and scientific activities during the fiscal year ending June 30, 1966. It lists

32
major programs as they were carried out by the three NBS

institutes: Institute for Basic Standards, Institute for Materials

Research, and Institute for Applied Technology. Summaries are given of typical institute projects in applied mathematics,

electricity, metrology, mechanics, heat, atomic physics, physical

chemistry, laboratory astrophysics, radiation physics, radio

standards, analytical chemistry, polymers, metallurgy, inorganic

materials, reactor radiations, cryogenics, building research,

information technology, instrumentation, radio propagation,

engineering standards, and weights and measures. Also included

are discussions of the Clearinghouse for Federal Scientific and

Technical Information, the National Standard Reference Data

System, Standard Reference Materials program, measurement

services program, and national and international cooperative

activities. This report also includes the description of the new

laboratory facilities at Gaithersburg, Md., and the history of their construction.

M284. Technology and world trade. Proceedings of a symposium

held at the National Bureau of Standards, Gaithersburg, Md.,

November 16-17, 1966, Editor, R. L. Stern, NBS Misc. Publ. 284(1967).

Key words: Developing countries; international standards;

role of government; role of private enterprise; technology;

world trade. The publication embodies the proceedings of the Symposium

on Technology and World Trade, held on the occasion of the dedication of the new laboratories of the National Bureau of

Standards at Gaithersburg, Maryland. Subjects considered by

the 29 speakers and discussants from the United States, nine

other nations, and the United Nations, include: Technology's

Impact on the Character of World Trade and Investment;

International Competition and Co-operation in Technology; The

Role of International Standards; The Respective Roles of

Government, Public and Private Enterprises in Creating, Using

and Transferring Technology; and Technology in Relation to the Developing Countries.

M285. Nuclear science and technology for ceramists. Proceedings

of the American Ceramic Society Symposium, Washington,

D.C., April 7-12, 1966, NBS Misc. Publ. 285 (May 26, 1967).

Key words: Ceramics; lattice defects; nuclear fuels; nuclear

science and technology; radiation damage; reactor

materials. An introductory survey is given on the subject of Nuclear

Ceramics, consisting of six invited papers presented at an American Ceramic Society Symposium held in April, 1966. Authors and their titles are: C. O. Muehlhause (National Bureau

of Standards) "Material Radiation Environment"; A. B. Lidiard

(UK Atomic Energy Research Establishment, Harwell,

England) "Radiation Damage in Ceramics"; P. W. Levy

(Brookhaven National Laboratory) "Physical Properties of

Irradiated Ceramic Materials"; R. J. Thorn and G. H. Winslow

(Argonne National Laboratory) "Chemical Problems

Associated with Lattice Defects"; D. W. Readey and J. H.

Handwerk (Argonne National Laboratory) "Nuclear Fuel

Materials"; and D. R. deHalas, W. D. Freshley, and W. C. Morgan (Pacific Northwest Laboratories, Batelle Memorial

Institute) "Reactor Materials Design." The volume is intended

to provide a survey of those properties involved in the choice

and use of ceramics for nuclear technology, and as a reference

useful in the teaching of ceramic science.

M286. Units of weight and measure. International (metric) and

U.S. customary, L. J. Chisholm, NBS Misc. Publ. 286 (May

1967).

Key words: Conversion tables; International System (SI); Metric System; U. S. Customary System; weights and

measures; weights and measures abbreviations; weights and measures systems; weights and measures units. The primary purpose of this publication is to make available

the most often needed weights and measures conversion tablesConversions between the U. S. Customary System and

International (Metric) System. A secondary purpose is to present a brief historical outline of the International (Metric)

System-following it from its country of origin, France, through

its progress in the United States. (Supersedes NBS Misc. Publ.

233).

M287. Calculation of the properties of vacancies and interstitials. Proceedings of a conference, Shenandoah National Park, Va.,

May 1-5, 1966, NBS Misc. Publ. 287 (Nov. 17, 1966).

Key words: Calculations; electronic states, energies of

formation; energies of motion; interstitials; point defects; theory; vacancies; vibrational states.

This is the Proceedings of a Conference on the Calculation of

the Properties of Vacancies and Interstitials. The Conference

dealt with the theory and techniques of calculation of the properties of point defects in metallic and nonmetallic crystals.

The contributed and invited papers divided about evenly among

three major topics: (1) static-lattice calculations of the energies

and configurations of simple vacancies and interstitials in, mainly, metals and ionic crystals; (2) electronic states at and near

point defects in metals, rare gas solids, and insulators (/"-centers, electron traps); and (3) vibrational states at point defects. The

report of a panel discussion on each topic is also included. The

emphasis is on the theory of the properties of isolated, simple

defects rather than on the statistical properties of defect assemblies. The Conference attempted to examine the point defect theory and calculations critically, from the standpoint of

general theory, rather than simply compare results with

experiment.

M288. Directory of United States standardization activities, J. E. Hartman, NBS Misc. Publ. 288 (Aug. 1 , 1967).

Key words: Certification and labeling plans; government

standardization, U. S.; specifications; standardization

activities, U. S.; standards; test methods.

The success of our nation's standardization program is due

largely to the support given it by our national standardizing

organizations. Some of these groups work toward establishing

standards, while others develop test methods or certification and

labeling plans to guarantee that products meet the specified standards. This Directory is a revision of NBS Miscellaneous

Publication M230 "Standardization Activities in the United

States" (1960). Work on the present edition began by

questioning 1800 trade associations and standardizing groups in order to locate those undertaking a substantial degree of creative

technical and engineering standardization. The Directory

describes the activities of 486 American organizations engaged

in standardization as a major or important part of their work. It includes a standardizing group for nearly all widely known

product areas such as textiles, paper, leather, ceramics, plastics,

electrical equipment, rubber, cement, etc. A comprehensive

index provides quick reference to organizations and the fields,

products, and services in which they specialize. (Supersedes

NBS Misc. Publ. 230).

M289. Bibliography of low energy electron collision cross section data, L.J. Kieffer, NBS Misc. Publ. 289 (Mar. 10, 1967).

Key words: Atom; molecule; electron; collision cross

section. A bibliography of low energy electron collision cross section

data is presented. Only references which report original

33
measurements or calculations of electron collision cross sections

are included. The cross section data for each process are listed by atomic species in order of their atomic number. The data for molecules are listed in arbitrary order.

M290. Report of the 51st National Conference on Weights and

Measures, 1966, Report Editor, L. J. Chisholm, NBS Misc.

Publ. 290 (May 15, 1967).

Key words: Conference, National; weights and measures. A report of the proceeding of the fifty-first National

Conference on Weights and Measures, held in Denver,

Colorado, July II, 12, 13, 14, and 15, 1966, and attended by

state, county, and city weights and measures officials. M29 1 . Proceedings of the 1966 Standards Laboratory Conference,

held at the National Bureau of Standards, Gaithersburg, Md.,

May 9-12, 1966, NBS Misc. Publ. 291 (July 13, 1967).

Key words: Accuracy; calibrations; conferences, 1966

Standards Laboratory; foreign standards laboratories; laboratory management; measurements and standards; measurement system; National Conference of Standards

Laboratories; proceedings, 1966 Standards Laboratory

Conference; traceability; United States measurement

system.

The annual report of the NCSL chairman, and the text of 50

presentations on standards laboratory problems are given in this volume. The subjects treated at the third biennial congress of

delegates of the National Conference of Standards Laboratories,

held at the NBS Gaithersburg facility. May 9-12, 1966, included

committee reports and panel discussions on the 1965-66

measurement agreement comparison, statistical control of the measurement process, information needs and sources,

calibration procedures, the measurement system of USA,

calibration needs of USA, personnel development, traceability

and accuracy ratio, world-wide physical standards, equipment

performance, organization and management, workload, and

recommended practices.

M292. Bibliography of Liesegang rings (Second Edition), K. H.

Stern, NBS Misc. Publ. 292 (Sept. 1 , 1967).

Key words: Diffusion; Liesegang rings; periodic

precipitation.

A bibliography of Liesegang rings (periodic precipitation

figures produced by diffusion) and other periodic structures for

the period 1855-1965 is compiled in chronological and

alphabetical order. An author index and an index to applications

of Liesegang rings to extra-chemical fields are also given.

M293. Technical highlights of the National Bureau of Standards,

Annual Report 1967, NBS Misc. Publ. 293 (Nov. 1967).

Key words: Annual report; technical highlights.

This is an illustrated digest of NBS technical and scientific activities during the fiscal year ending June 30, 1967. It lists major programs as they were carried out by the three NBS

institutes: Institute for Basic Standards, Institute for Materials

Research, and Institute for Applied Technology. Summaries are given of typical institute projects in applied mathematics,

electricity, metrology, mechanics, heat, atomic physics, physical

chemistry, laboratory astrophysics, radiation physics, radio

standards, analytical chemistry, polymers, metallurgy, inorganic

materials, reactor radiations, cryogenics, building research,

information technology, instrumentation, radio propagation,

engineering standards, and weights and measures. Also included

are discussions of the Clearinghouse for Federal Scientific and

Technical Information, the National Standard Reference Data

System, Standard Reference Materials program, measurement

services program, and national and international cooperative

activities.

M294. Operations research. Proceedings of a conference for Washington area government agencies, April 20, 1966, Editor, J. A. Joseph, NBS Misc. Publ. 294 (Dec. 1967).

Key words: Conference proceedings; government;

operations research; systems analysis.

The proceedings of a one-day conference of practitioners and

users of Operations Research in Federal Government in the Washington, D.C. area, sponsored by the National Bureau of

Standards. The purpose of the conference was to initiate a series of periodic meetings where information on topics of actual concerns might be exchanged. Invited papers were presented by

Prof. Merill M. Flood on "Operations Research in the Civilian Sector of the Government," Dr. John Haldi on "The PlanningProgramming-Budgeting System," and Dr. Alan J. Hoffman on

"Operations Research and Government O.R." Reports of two

panel meetings on "Special Problems of Operations Research in Civil Agencies of Government" and "Broadening the O.R.

Competence of Mid-Careerist" are included on the proceedings.

34
3.7. APPLIED MATHEMATICS SERIES

The Applied Mathematics Series contains mathematical

tables, manuals and studies of special interest to physicists,

engineers, chemists, biologists, mathematicians, computers and

others engaged in scientific and technical work. Some of the volumes are reissues, to meet a continuing demand, of the Mathematical Tables prepared by the Project for the Computation of Mathematical Tables conducted by the Federal

Works Agency, Work Projects Administration for the City of

New York, under the scientific sponsorship of and made

available through the National Bureau of Standards. The

Mathematical Tables series (MT) as originally issued is out of

print; the list, by title, is given in NBS Circular 460.

When the Applied Mathematics Division was established at the National Bureau of Standards in July 1947, the Mathematical

Tables Project became identified with the unit of this Division

known as the Computation Laboratory. See "Price List of

Available Publications", page 105.

AMS59. Tables relating to Mathieu functions, Characteristic

values, coefficients, and joining factors, NBS Appl. Math.

Series 59 (Aug. 1, 1967).

Key words: Characteristic values; coefficients; joining

factors; Mathieu's equation.

This second edition of "Tables Relating to Mathieu

Functions" (Columbia University Press, New York, 1951)

incorporates the article "Table of Characteristic Values of

Mathieu's Equation for Large Values of the Parameter" by

Gertrude Blanch and Ida Rhodes, Journal of the Washington

Academy of Sciences, Volume 45, No. 6, 166-196, June 1955,

but makes no essenfial changes in tables or introductory

material. However, a number of misprints in the first edition

have been corrected and the bibliography updated. (A reissue,

with additions, of Columbia University Press 13).

35
3.8. NATIONAL STANDARD REFERENCE DATA SERIES

This series provides quantitative data on the physical and

chemical properties of materials, compiled from the world's

literature and critically evaluated. Reports will fall into eight

categories: general; nuclear properties; atomic and molecular

properties; solid state properties; thermodynamic and transport

properties; chemical kinetics; colloid and surface properties; and

mechanical properties of materials. See "Price List of Available

Publications," page 104. NSRDS-NBS3, Section 2. Selected tables of atomic spectra;

atomic energy levels and multiplet tables; Si i, C. E. Moore,

NBS Natl. Std. Ref. Data Series 3. Section 2 (Nov. 30, 1967).

Key words: Atomic energy levels; atomic spectra Si i; first spectrum; multiplet table; silicon; spectrum. Si i; wavelengths, Si i. The present publication is the second Section of a series being

prepared in response to the increasing demand for a current

revision of two sets of tables containing data on atomic spectra

as derived from analyses of optical spectra.

Both the atomic energy levels and the multiplet table are included in the same publication, as parts A and B, respectively.

The Sections are being prepared at irregular intervals for these

spectra whose analyses are essentially complete. A flexible paging system permits the arrangement of the various Sections

by atomic number regardless of the order in which the spectra

are published in this series. Section 1 included three spectra of

silicon, Z=14: Si ii. Si ill. Si iv. The present Section contains

similar data for Si i. The form of presentation is described in detail in the text to Section 1 , and need not be repeated here.

NSRDS-NBS5. The band spectrum of carbon monoxide, P. H. Krupenie,NBS Natl. Std. Ref. Data Series 5 (July 8, 1966).

Key words: Carbon monoxide; spectrum; review.

This is an exhaustive review of the literature and a critical compilation of the observed and predicted spectroscopic data on CO, CO+, and CO''+ in the gas phase.

NSRDS-NBS6. Tables of molecular vibrational frequencies, Part

I, T. Shimanouchi, NBS Natl. Std. Ref. Data Series 6 (Mar. 1

1967).

Key words: Molecular; vibrational; frequencies; data;

tables; force; constants; spectral.

A compilation of vibrational frequency data for selected molecules is being conducted at the University of Tokyo in cooperation with the National Standard Reference Data

Program of the National Bureau of Standards as a part of an

international effort to compile and evaluate physical and

chemical data. This report, first of a series of annual reports,

contains fundamental vibrational frequencies of 59 molecules

together with vibrational assignments, sources of data, brief comments, and citations of references. The fundamental

frequencies are obtained mainly from the infrared and Raman

spectra. When these are not available, other experimental data

such as microwave results are taken into account. The selection

of vibrational fundamentals from observed spectral data is based

upon careful studies of the spectral data and comprehensive

mathematical analyses. These tables were designed to provide a

concise summary needed for the computation of ideal gas thermodynamic properties. They may also provide a convenient

source of information to those who require vibrational energy

levels and related properties in molecular spectroscopy,

analytical chemistry, and other fields of physics and chemistry.

NSRDS-NBS7. High temperature properties and decomposition

of inorganic salts. Part I. Sulfates, K. H. Stern and E. L. Weise,

NBS Natl. Std. Ref Data Series 7 (Oct. 1, 1966).

Key words: Sulfates; thermodynamic functions;

decomposition pressures. The literature dealing with the high-temperature behavior of

inorganic sulfates has been critically reviewed. Free energy

functions of reactants and products of the decomposition

reactions were calculated and have been tabulated from 298 °K

up to as high a temperature as possible. Free energy functions,

equilibrium constants of reactions, and partial pressures of

gaseous components were tabulated. Auxiliary data on phase

transitions, densities, and kinetics of chemical decomposition

have also been included.

NSRDS-NBS8. Thermal conductivity of selected materials, R. W.

Powell, C. Y. Ho, and P. E. Liley, NBS Natl. Std. Ref. Data

Series 8 (Nov. 25,1966).

Key words: Gases; liquids; metals; solids; thermal

conductivity.

The data presented in this publication consists of the critical evaluation and analysis of the available thermal conductivity

data on eleven metals and nine nonmetals for the solid state, on

seven fluids for both the liquid and gaseous states and on two for the liquid state only. The materials studied were selected primarily for their potential applicability as reference standards

or because of their technical importance. The temperature range

for which values are given often exceeds that for which these

values are known with a high degree of certainty.

NSRDS-NBS9. Tibles of bimolecular gas reactions, A. F. Trotman-Dickenson and G. S. Milne, NBS Natl. Std. Ref. Data Series 9 (Oct. 27, 1967).

Key words: Activation energies; Arrhenius equation;

bimolecular; chemical kinetics; data; gas; rate constants;

reactions; tables.

This survey covers the kinetics of bimolecular and

termolecular gas reactions that do not involve atoms or molecules in electronically excited states. Bimolecular reactions

are here defined as reactions in which two molecules are involved as reactants. that yield two or more molecules as products. Those reactions in which two molecules combine to form one molecule are most usefully considered as the reverse of

unimolecular reactions which will be dealt with in another

survey. Reactions of oxygen and nitrogen atoms have been

omitted as they will also form the subject of another survey. The literature from 1954 to December 31. 1965 has been

exhaustively searched and it is hoped that for this period nothing

has been omitted that should have been included.

The survey of earlier work has been based on one of the

writers" books on "Gas Kinetics" which covered the literature to 1954. Use of the book for over ten years has revealed few

omissions and these have been included in these tables. Data for the period January to August 1966 has been included where

possible.

36
NSRDS-NBSIO. Selected values of electric dipole moments for molecules in the gas phase, R. D. Nelson, Jr., D. R. Lide, Jr., and A. A. Maryott, NBS Natl. Std. Ref. Data Series 10 (Sept.

1, 1967).

Key words: Dielectric constant; electric dipole moments;

gas phase; microwave; microwave absorption; molecular

beam; permittivity; refractive index; spectroscopy.

This table revises, brings up to date, and extends the coverage on numerical values for dipole moments which was included in NBS Circular 537, Tables of Dielectric Constants and Electric Dipole Moments of Substances in the Gaseous State, prepared

by Maryott and Buckley in 1953. A recommended value with an

estimate of accuracy is presented for more than five hundred

organic and inorganic compounds. Extensive comments are given on the definition of dipole moment and principal methods

of dipole moment measurement, as well as an exposition of the

criteria employed in selecting the tabulated data. (Supersedes

the data on dipole moments included in NBS Circ. 537).

NSRDS-NBSll. Tables of molecular vibrational frequencies. Part II, T. Shimanouchi, NBS Natl. Std. Ref Data Series 1

(Oct. 1967).

Key words: Data; force constants; infrared spectra; modes

of vibration; molecular vibrational frequencies; molecular

spectra; Raman spectra.

A compilation of vibrational frequency data for selected molecules is being conducted at the University of Tokyo in cooperation with the National Standard Reference Data

Program of the National Bureau of Standards as a part of an

international effort to compile and evaluate physical and

chemical data. This report, as a continuation of Part 1 published

as NSRDS-NBS 6, contains fundamental vibrational frequencies

of 54 molecules together with vibrational assignments, sources of data, brief comments, and citations of references. The

procedures used for the preparation of tables are the same as given in Part I. The fundamental frequencies are obtained

mainly from the infrared and Raman spectra. When these are not

available, other experimental data such as microwave results are taken into account. The selection of vibrational fundamentals

from observed data is based upon careful studies of the spectral

data and comprehensive mathematical analyses. These tables were designed to provide a concise summary needed for the computaion of ideal gas thermodynamic properties. They may

also provide a convenient source of information to those who

require vibrational energy levels and related properties in molecular spectroscopy, analytical chemistry, and other fields of

physics and chemistry.

NSRDS-NBS14. X-ray wavelengths and X-ray atomic energy

levels, NBS Natl. Std. Ref. Data Series 14 (Sept. 25, 1967).

Key words: Absorption; atomic; data compilation;

emission; energy levels; x-ray wavelength.

X-ray wavelengths, J. A. Bearden:

Inconsistencies in accepted values (in x units) of x-ray reference lines have recently been demonstrated, although all are supposedly based on "good" calcite crystals. Factors supporting

the selection of the W Kui line as the X-Ray Wavelength

Standard are critically discussed. A review is given of the experimental measurements which are used to establish the wavelength of this line on an absolute angstrom basis. Its value

is A W A:a,=(0.2090100±5 ppm) A. This may be used to define a new unit, denoted by A*, such that the W Ka^ wavelength is exactly 0.2090100 A*; hence lA=lA±5ppm. The wavelengths of the Ag Kau Mo Ka\, Cu Ka^, and the Cr Ka2 have

been established as secondary standards with probable error of approximately one part per million. Sixty-one additional x-ray lines have been used as reference values in a comprehensive review and reevaluation of more than 2700

emission and absorption wavelengths. The recommended

wavelength values are listed in A* units together with probable

errors; corresponding energies are given in keV. A second table

lists the wavelengths in numerical order, and likewise includes

their energies in keV.

Reevaluation of X-ray atomic energy levels, J. A. Bearden and

A. P. Burr:

All of the x-ray emission wavelengths have recently been

reevaluated and placed on a consistent A* scale. For most

elements these data give a highly overdetermined set of

equations for energy level differences, which have been solved

by least-squares adjustment for each case. This procedure

makes "best" use of all x-ray wavelength data, and also permits

calculation of the probable error for each energy difference. Photoelcctron measurements of absolute energy levels are more

precise than x-ray absorption edge data. These have been used

to establish the absolute scale for eighty-one elements and, in many cases, to provide additional energy level difference data. The x-ray absorption wavelengths were used for eight elements

and ionization measurements for two; the remaining five were

interpolated by a Moseley diagram involving the output values of

energy levels from adjacent elements. Probable errors are listed on an absolute energy basis. In the original source of the present

data, a table of energy levels in Rydberg units is given.

Difference tables in volts, Rydbergs, and milli-A* wavelength

units, with the respective probable errors, are also included

there.

37
3.9. BUILDING SCIENCE SERIES

Research results, test methods, and performance criteria of

building materials, components, systems, and structures. See

"Price List of Available Publications'", page 104.

BSS9. Thermal-shock resistance for built-up membranes, W. C. Cullen and T. H. Boone, NBS Bldg. Sci. Series 9 (Aug. 21,

1967).

Section 1. Progress in the development of a thermal-shock

resistance factor for bitummous built-up roofing membranes.

Key words: Development; roofing membrane; strength

properties; thermally induced forces; thermal-shock

" resistance factor. The resistance of bituminous built-up roofing membranes to thermally induced forces is considered in terms of their strength

properties such as breaking load in tension, modulus of

elongation and apparent linear thermal expansion coefficient. The development of a Thermal-Shock Resistance Factor is described and values are given for three bituminous built-up

membranes at temperatures of -30 °F (-34.4 °C), 0 °F (-17.8 °C),

30 °F (-1.1 °C) and 73 °F (22.8 °C). The apparent relation between the values obtained in the laboratory and the observed

performance of roofing membranes in service is considered. The

utilization of the Thermal-Shock Resistance Factor in the reduction of potential failures of bituminous built-up roofing

membranes in service from thermally induced forces is also discussed.

Section 2. Thermal-shock resistance for bituminous built-up

roofing membranes-Its relation to service life. Key words: Bituminous-built-up roofing; roofing

membrane; service life; thermal-shock resistance factor; tension splitting.

The assignment of a service life to a bituminous built-up

roofing system is frequently difficult because of the many

variables involved. A knowledge of these variables, and of their

effect on the performance of the total building system, will greatly assist in the selection of a roofing assembly and the assignment of a service life to such an assembly.

Some of the factors such as breaking load in tension, modulus

of elongation, and apparent linear thermal expansion coefficient of roofing membranes of different composition are given for both

laboratory-prepared and field-obtained samples. Membranes of

2, 3, and 4-plies of felt are included. The relations of some

engineering properties of a roofing membrane to performance in sevice as expressed by a Thermal-Shock Resistance Factor are

also given. Ways and means to reduce potential failures of

bituminous built-up roofing membranes resulting from thermally

induced forces are discussed.

BSS 1 0. Field burnout tests of apartment dwelling units, D. Gross,

NBS Bldg. Sci. Series 10 (Sept. 29, 1967).

Key words: Apartment dwelling; burnout test; fire load; fire performance; flame penetration; potential heat; structural

load.

Results are reported of three burnout tests in an experimental

test building, using a wood crib fuel load of 6 lb/ft'^ representing

combustible contents, and a structural design load of 40 Ib/ff^ applied to the floor or roof above the test room. Measurements

were made of temperature, radiation, smoke, gas composition,

and structural deflection. A discussion of the fire performance of

materials and methods of construction, and conclusions with

regard to specific fireprotective objectives are presented.

BSSl 1. Fire resistance of steel deck floor assemblies, H. Shoub

and S. H. Ingberg, NBS Bldg. Sci. Series 12 (Dec. 1967).

Key words: Burnout tests; fire endurance; fire severity; floor tests; steel plate floors.

Tests were conducted to determine the resistance to fire of

welded steel plate and beam floor assemblies with various

conditions of floor covering on the plates, and ceiling protections

beneath the beams. The trials included fire exposures from the burnout of combustible materials ranging from 10 to 40 lb/ft- on

the floor surface as well as standard fire endurance tests in which

the ceiling of the structure was exposed to fire. The results of the tests indicated that the use of steel floor structures was practical from considerations of fire safety. For

the test conditions established, fire exposure on top of the floor did not heat the structural steel supporting members sufficiently to cause load failure or collapse, and did not produce untenable

conditions in the room below. In tests involving fire exposure to the underside of floors, the fire endurance times, based solely on

heat transmission criteria, ranged from 1 hr 24 min to over 4 hr. Temperature levels attained by the structural members and

deflection of the floor assemblies are also reported.

BSS 12. Performance of square-edged orifices and orifice-target

combinations as air mixers, T. K. Faison, Jr.. J. C. Davis, and

P. R. Achenbach.NBS Bldg. Sci. Series 12 (Nov. 24, 1967).

Key words: Diameter ratio; mixing effectiveness; square- edged orifice; temperature measurement; temperature

pattern.

A study was made at the National Bureau of Standards to determine the effectiveness of the square-edged orifice, or the

orifice in combination with a target (circular baffle), for mixing an air stream, which was initially nonuniform with respect to temperature. By achieving uniformity of temperature at all points within the cross section of an air stream, instrumentation

for measurement might be simplified and a more representative

temperature value obtained. Orifices having throat diameters of

8, 12, and 16 in were evaluated in a 24-in circular test duct to determine mixing effectiveness under selected test conditions of

temperature distribution and flow rate. Targets of 8, 12. and 16

in in diameter in combination with a 12-in orifice were also investigated under similar conditions.

Graphic material is presented which illustrates how the orifice and orifice-target combinations perform as mixing devices under

selected conditions. Results indicate that the 8-in (0.33 diam

ratio) orifice effectively diminished the nonuniformity of

temperature but only at a high pressure drop across the orifice and that a distance of 4.5 duct diameters was required for mixing.

38
3.10. COMMERCIAL STANDARDS

This series define the quality levels for products in accordance

with the principal needs of the trade. Their use is voluntary. See

"Price List of Available Publications", page 105.

CS188-66. Cast iron soil pipe and fittings, NBS Comm. Std. 188- 66 (July 1, 1966).

Key words: Cast iron pipe, requirements; soil pipe and

fittings; soil pipe dimensions.

This standard covers pipe and fittings of the following patterns

and, when so designated, may apply to any other patterns that conform with the requirements given therein. (Supersedes

CS188-59).

CS236-66. Mat-formed wood particleboard, NBS Comm. Std. 236-66 (Apr. 15, 1966).

Key words: Mat-formed particleboard; particleboard

requirements; particleboard, wood; wood particleboard.

This Commercial Standard covers two types of mat-formed

wood particleboard; one for interior applications and one for certain exterior applications in addition to interior applications.

Each type is further divided into several density grades which

are subdivided into strength classifications. It is intended that the applications of the products will be consistent with the properties of the respective density grades and strength

classifications described. Also included are definitions,

dimensional tolerances, test methods, inspection practices, and

methods of marking and certification to identify products that comply with all requirements of this Standard. (Supersedes

CS236-61).

CS251-63. Hardboard, NBS Comm. Std. 251-63 (Nov. 15, 1966).

Key words: Fiber board; hardboard; ligno-cellulosic fibers; and lignin and hot pressed fibers.

This standard sets forth the standard commercial types, and

sizes of hardboard, and gives information on special hardboards

available. It provides specifications for physical requirements

and test methods for static bending (modulus of rupture), tensile strength, water absorption, and thickness swelling. It includes a glossary of terms used in the hardboard industry, and

recommends a uniform means of marking and certifying for the consumer hardboards that comply with this Standard.

(Reprinted April 1967 with Amendments effective November

15, 1966).

CS274-66. TFE-fluorocarbon (polytetrafluoroethylene) resin sintered thin coatings for dry film lubrication, N BS Comm. Std. 274-66 (Jan. 20, 1966).

Key words: Coatings, dry film; dry film lubrication; polytetrafluoroethylene; resin sintered coatings; and TFEfluorocarbon.

This standard establishes the requirements and methods of

test for the material, thickness, workmanship, and properties of

TFE-fluorocarbon resin coatings 0.001 inch or less in thickness

for the purpose of dry film lubrication. Methods of marking and

indicating compliance with this standard are included.

39
3.11. SIMPLIFIED PRACTICE RECOMMENDATIONS

This series list the staple sizes, kinds, types, and applicable

methods for certain commodities produced and stocked in greatest quantity, to aid in holding variety to a minimum. Their

use is voluntary. See "Price List of Available Publications",

page 105.

SPR174-65. Cast-iron radiators, NBS Simpl. Prac. Recomd. 174

65 (Dec. 31, 1965).

Key words: Cast iron radiators; radiators, cast iron; radiator

ratings; radiator sizes.

This recommendation covers sizes, types and dimensions of

radiators, stock assemblies and general provisions. It does not cover baseboard type of radiation. (Supersedes SPR 174-47.)

40
3.12. PRODUCT STANDARDS

This series provide requirements for sizes, types, quality and

methods for testing various industrial products. These standards

are developed cooperatively with interested Government and

industry groups and provide the basis for common understanding

of product characteristics for both buyers and sellers. Their use

is voluntary. (Replaces the Commercial Standard Series and

Simplified Practice Recommendations.) See "Price List of

Available Publications"", page 105.

PS 1-66. Softwood plywood, construction and industrial, NBS

Prod. Std. 1-66 (Nov. 1, 1966).

Key words: Adhesives; boil test; bonding; exterior; grading;

interior; moisture content; overlay; plywood; shear test; vacuum and pressure test.

This Product Standard covers the principal types, grades and

sizes of plywood. Requirements are specified for wood species, veneer grading, overlays, glue bond, panel construction,

moisture content, dimensions and tolerances, as well as sampling

and inspection procedures, test methods to determine

compliance, and a glossary of trade terms and definitions. A

quality certification program is provided for herein, whereby

qualified testing agencies inspect, sample and test products

identified as complying with this Standard. (Supersedes CS45-

60, CS 1 22-60, and CS259-63 ).

PS2-66. Standard sizes of blackboard slate, NBS Prod. Std. 2-66

(May 15, 1966).

Key words: Blackboards; dimensions; natural markings;

slabs; slate; standard sizes; thickness; tolerances.

This recommendation covers dimensions for blackboard slabs and dimensions of blackboard slates for other than wall use. Also included are requirements for thickness, finish, and color and imperfections of natural slate. (Supersedes SPR15-35).

PS3-66. TFE-fluorocarbon (polytetrafluoroethylene) resin skived

tape, NBS Prod. Std. 3-66 (Sept. 1 , 1966).

Key words: Electrical tape, plastic; plastic tape;

polytetrafluoroethylene; resin skived tape; skived tape;

TFE-fluorocarbon.

This standard establishes requirements and methods of test for the material, dimensions, workmanship, and the physical and

electrical properties of three grades of skived tape manufactured

entirely of TFE-fluorocarbon resin in accordance with good

commercial practice. The materials covered range in thickness

from 0.002 inch to 0. 1 25 inch, and are normally manufactured by

skiving.

PS4-66. Standard stock light-duty 1 3/8- and 1 3/4-inch thick flush-type interior steel doors and frames, NBS Prod. Std. 4-66

(Nov. 1, 1966).

Key words: Interior steel doors; standard interior steel doors; steel doorframes, steel doors, interior.

This Product Standard covers sizes, types, materials,

construction, hardware installation, and finishing of the doors,

frames, and accessories. They are intended to be stock items for

use in light-duty applications where low cost flush doors are

desired. The standard also provides a uniform method of

marking, identifying, and labeling. (Supersedes CS2 11 -57).

PS5-66. Porcelain enameled formed steel plumbing fixtures, NBS

Prod. Std. 5-66 (Nov. 1, 1966).

Key words: Abrasion resistance; chemical resistance; porcelain enamel; sanitary ware; sheet steel. The standard covers materials, dimensions, construction and

methods of inspection, testing, and labeling. Definitions are given for certain trade terms. The types and sizes of fixtures in general use and demand are listed for bathtubs, lavatories,

kitchen sinks and sink-and-laundry-tray combinations. (Supersedes CS 144-47).

PS6-66. Trim for water-closet bowls, tanks and urinals (dimensional standards), NBS Prod. Std. 6-66 (Nov. 1, 1966).

Key words: Bowls; brass; dimensions; nuts; plastic;

plumbing equipment; tanks; valves. The purpose of this standard is to establish a basis for dimensional interchangeability for those items of trim for watercloset bowls, tanks and urinals known as spuds, lock nuts for spuds, flush valves for staple low tanks, float valves, flush elbows, and coupling nuts. It is also intended to provide a basis for understanding between buyers and sellers for the dimensions

and tolerances that govern the fit of trim in the fixtures and

connecting parts of trim. (Supersedes CS 172-50).

PS7-66. Wire bar supports for reinforced concrete construction,

NBS Prod. Std. 7-66 (Aug. 1, 1966).

Key words: Bars, concrete reinforcement; concrete

construction, supports; reinforced concrete construcfion;

reinforcement bars; wire bar supports.

The standard lists twelve types of wire bar supports and the

sizes of each in greatest demand. The minimum size of wire is given for each type of bar support. Maximum spacings at which

the bar supports will function properly in ordinary slabs, joists,

beams, and girders are included. The standard also lists a number of modifications of the standard bar supports for special

applications in concrete reinforcement, which are not regularly

stocked but may be obtained as standard items when specified.

PS8-67. Grading of abrasive grain on coated abrasive products,

NBS Prod. Std. 8-67 (Jan. 9, 1967).

Key words: Abrasive grain; accumulation curve; coated

abrasive products; grain, abrasive; micron; overgrade;

sedimentation; sieve; standard sieve. The scope of this Product Standard is confined to a determination of the grit sizes of the abrasive grain on the coated

product. However, the information may also be of use in the preparation of abrasive grain for making coated abrasive

products. It has been developed to cover, insofar as possible, the grading of the grit sizes of abrasive grain on the standard coated

abrasive products listed in Simplified Practice Recommendation

R89-55. (Supersedes CS2 17-59).

313-589 0-69 —

41
3.13. TECHNICAL NOTES

This series was initiated in 1959 to supplement the Bureau's

regular publications program. Technical Notes provide a means

for making available scientific data that are of transient or limited

interest. See "Price List of Available Publications", page 106. TNI 00-A, Supplement to Appendix C of TNIOO. Loading

factors and FDM-FM system performance calculations, E. F. Florman,NBS Tech. Note 100-A (Sept. 1967).

Key words: Modulators; radio communications; radio

receivers; transistors.

This supplement was written for the purpose of extending the scope of the original paper, by providing a more complete set of

system-performance design equations, which apply to the Frequency Division Multiplex-Frequency Modulation type of

multichannel telecommunication systems; these equations may

be used for various types, and combinations of types, of message

signals.

TN213. Unassigned.

TN246. A survey of some empirical and semi-empirical

interatomic and intermolecular potentials, B. N. Axilrod, NBS

Tech. Note 246 (Oct. 3, 1966).

Key words; Atoms; compressibility; heat of sublimation;

molecules; potential functions; empirical and semiempirical; transport properties; virial coefficients. Many empirical and semi-empirical potential functions have

been proposed or developed to represent the pairwise interaction

of atoms and molecules. The simple pair potentials proposed

usually contain parameters to be adjusted to fit certain properties, for example, when chemical combination does not occur, virial coefficients and similar quantities for the gaseous

state, or compressibility and heat of sublimation for the

crystalline state. In the present survey a number of potentials

proposed recently are examined to indicate the variety of

concepts employed and the suitability of the potential functions.

TN277. Analytical Mass Spectrometry Section: instrumentation

and procedures for isotopic analysis. Edited by W. R. Shields,

NBS Tech. Note 277 (July 25, 1966).

Key words: Mass spectrometry; instrumentation;

procedures; isotopic analysis.

This report describes the general instrumentation of the Analytical Mass Spectrometry Section and the specific

analytical techniques which have been devised for the measurement of isotopic ratios of Ag, Br, CI, Cr, Cs, Cu, Mg,

Pu, and U. Interim procedures for B, Li, Rb, and Sr are also

given.

In the appendix some general statistical principles used in the design and analysis are briefly discussed; an example is given in detail illustrating the various steps involved leading from original

data to the reported uncertainties for the isotopic ratio of

bromine.

TN278. Scanning electron probe microanalysis, K. F. J. Heinrich,

NBS Tech. Note 278 (Feb. 3. 1967).

Key words: Electron probe; microanalysis; x-ray spectrometry; scanning electron microscopy; electron backscatter; cathodoluminescence.

The combination of electron microprobe x-ray emission

spectrometry with the scanning techniques first developed for the scanning electron microscope permits using the scanning

electron probe as a microscope sensitive to elemental

composition. This technique is particularly useful in the many

applications in which spatial distribution of one or more elements

in a specimen is more important than local composition.

Although oscilloscope representation of probe scanning is usually obtained by the simple technique of producing a dot of

light for each arriving photon, more sophisticated scanning

techniques such as expanded contrast registration and

concentration mapping can provide more quantitative

information. Signals other than x-rays, such as target current, electron backscatter, or cathodoluminescence may be used for image formation. Electron beam scanning can also be performed

in a discontinuous fashion, so that the electron beam irradiates in succession a number of spots arranged in a square or rectangular

pattern, and the number of photons registered in each position is retained in the memory of a multichannel analyzer. The

application of these diverse scanning techniques is illustrated.

TN292. Procedures for precise determination of thermal radiation

properties, November 1964 to October 1965, J. C. Richmond,

G. J. Kneissl, D. L. Kelley, and F. J. Kelly, NBS Tech. Note

292 (Feb. 10, 1967).

Key words; Emissivity; emittance; high temperature

reflectance; infrared reflectance; radiation properties; reflectance; spectral emittance; spectral reflectance; thermal radiation; total emittance.

The broad overall objective of this continuing program is to develop equipment and procedures for measuring the important

thermal radiation properties of materials, particularly those used

in aircraft, missiles, and space vehicles, at temperatures up to the melting point of the most refractory material, and to develop

physical standards for checking such equipment and procedures.

During the period covered by this report the specific objectives were: (1) continued development of the laser-source integration

sphere reflectometer, (2) an error analysis of the shallow cavity

technique for measuring normal spectral emittance, and (3) a study of the feasibility of preparing emittance standards for use at temperatures above 1400 °K (about 2000 °F). An error analysis of the shallow cavity technique for measuring total normal emittance of ceramic materials at very

high temperatures showed that there was an error due to the translucency of the specimens that was as much as -t-60% for alumina, and a second error due to thermal gradients in the specimen that was on the order of -10%. Two new techniques were devised in the hope of greatly reducing the translucency

error. Progress was made in developing codes to compute and

correct for the thermal gradients present in the specimen. The

laser-source integrating sphere reflectometer for measuring

reflectance of specimens at very high temperatures was

extensively redesigned to eliminate errors due to flux reaching

the detector on the first reflection, and to convert the reflectometer from the substitution to the comparison mode. A

literature search was made of techniques for measuring thermal

radiation properties of solids at temperatures above 2500 °K

(4000 °F).

TN293. Research on crystal growth and characterization at the National Bureau of Standards, June 1966, Editor, H. C. Allen,

Jr., NBS Tech. Note 293 (Aug. 26, 1966.)

42
Key words: Crystal growth; crystal characterization;

crystalline materials.

The National Bureau of Standards with partial support from

the Advanced Research Projects Agency of the Department of

Defense is continuing a wide program of studies involving

crystalline materials. These include investigation of methods

and theory of growth, study of detection and effects of defects,

determination of physical properties, refinement of chemical

analysis, and determination of stability relations and atomic

structure. The types of materials range from organic

compounds, through metals, and inorganic salts to refractory

oxides. This report summarizes progress in those projects

wholly or partially supported by ARPA.

TN294. Notes on the state-of-the-art of benefit-cost analysis as

related to transportation systems, J. D. Crumlish, NBS Tech.

Note 294 (Nov. 1, 1966).

Key words: Benefit-cost analysis; transportation

economics; transport systems; systems analysis; state of the

art.

This review of benefit-cost analysis as a tool for evaluating

alternative courses of action describes the technique, discusses a number of benefit-cost studies, and indicates the difficulties inherent in this area of applied economics. The author

concentrates on the application of the technique to large scale transport problems, reviews the literature and indicates in his conclusions where the technique can be helpful and where there

is little chance for its success. An accompanying matrix of benefit-cost studies and a commentary thereon is supplied by Marsha Geier, an NBS

economist. Miss Geier's literature search failed to produce any

analytic methods which were comprehensive, theoretically

justifiable, operational or significant. This finding tended to support the views of the author. (Introduction by Alan J. Goldman, Applied Mathematics Division, Institute for Basic

Standards, National Bureau of Standards.)

TN295. Disclosures on: A transrotor engine; high temperature

platinum resistance thermometer; dynamic analog correlation system; and combination metering and safety valve for filling sonde balloons with hydrogen, Editors, D. Robbins and A. J. Englert, NBS Tech. Note 295 (Oct. 2 1 , 1966).

Key words: Transrotor engine; platinum resistance; dynamic analog correlation system; combination metering

and safety valve; high temperatures.

This note presents descriptions and drawings of four devices,

embodying interesting and unusual solutions to problems

frequently encountered in their respective fields: a transrotor engine, a dynamic analog correlation system, a high temperature

platinum resistance thermometer, and a combination metering

and safety valve for filling sonde balloons with hydrogen.

Other disclosures on various subjects may be found in NBS

Technical Notes 237, 253, 263, 282, and 287.

TN296. A grammar for component combination in Chinese

characters, B. K. Rankin, III, S. Siegel, A. McClelland, and J. L. Tan, NBS Tech. Note 296 (Dec. 1966).

Key words: Chinese characters; grammar; generative

grammar; component combination; phrase structure grammar; linguistics; frame embedding; two-dimensional

languages.

A linguistic analysis of one aspect of the structure of Chinese

characters is presented. The analysis is an extension into two

dimensions of a general approach to one-dimensional language

study. Results of the analysis are in the form of a three-level

generative grammar. The first level formalizes restrictions governing the general complexity of well-formed Chinese

characters; the second level formalizes co-occurrence

constraints among character components and the particular

spatial arrangement of these components in classes of

characters; the third level constitutes a procedure for selecting actual components from a lexicon. Finally an evaluation of the grammar is presented, in terms of criteria used in evaluating

natural language grammars.

TN297. Evaluation of information systems: A selected bibliography with informative abstracts, M. M. Henderson,

NBS Tech. Note 297 (Dec. 1967).

Key words: Effectiveness; evaluation; performance;

relevance; testing of information systems.

A survey of the literature on evaluation of information systems

has been conducted by the Technical Information Exchange,

Center for Computer Sciences and Technology. National

Bureau of Standards. During the early stages of the survey, the

literature was divided among descriptions of programs which

compared the performance of two or more information systems, accounts of programs which studied the performance of one

system, papers and reports which discussed the problems of

evaluation programs, and documents which proposed new

techniques for evaluation of systems. From the total literature collected, those references which were judged to be most

directly concerned with the subject of evaluation of information

systems were selected and abstracted. The abstracts are designed to give a summary of the content of the corresponding

paper; the author's own wording was used extensively, in order

to avoid misinterpretation. All of the references collected are

listed, in alphabetic order of authors" names, in the appendix to the main body of this publication.

TN298. A survey of ionization vacuum gages and their performance characteristics, W. G. Brombacher, NBS Tech.

Note 298 (Feb. 3, 1967).

Key words: Bayard-Alpert gages; cold cathode vacuum

gages; conductance pressure dividers; hot cathode vacuum

gages; ionization gages; vacuum gage calibration systems; vacuum gages; volumetric pressure dividers. The design of various types of ionization gages is outlined,

with particular attention to the design elements important to performance. The performance and the many factors affecting the performance of the various gages are reviewed. Methods of

calibration are discussed in some detail, including the use of

volumetric pressure dividers, conductance pressure dividers and

constant rate of pressure change methods. About 365 references

to the literature are cited.

TN299. Calculation of the heating value of a sample of high purity

methane for use as a reference material, G. T. Armstrong, NBS

Tech. Note 299 (Dec. 15, 1966).

Key words: Methane; heafing value; heat of combustion;

reference material; gross heating value. The heat of combustion of CH4 has been recalculated in kj

(mol)-', Btu (mol)-', Btu (cu ft) ' (dry basis) and Btu (std. cu ft) '

(saturated basis), using the best available experimental

determinations of the heat of combustion and other measured

quantities and the most recent generally accepted physical constants and defined physical units. The calculations are outlined in detail. The resulting quantities are applied to calculation of the heat of combustion of a reference sample of

CH4 submitted for analysis of composition and certification of

heating value by the Institute of Gas Technology.

TN338. Unassigned.

43
TN339. Observed phase-front distortion in simulated eartli-to- space microwave transmissions, H. B. Janes and M. C. Thompson,Jr.,NBSTech. Note 399 (May 12, 1966).

Key words: Atmospheric; distance measurements; earth-to- space microwave transmissions; microwave transmissions;

phase; tracking.

An experimental study has been made of the time and space

statistics of the phase-front distortion of microwave signals sent from a ground terminal to an elevated terminal. These phasefront characteristics are important in systems involving phase

measurements between a ground station and a moving air-borne or space terminal. To isolate atmospheric errors from random

motion of the upper terminal, the latter was simulated by a series of mountaintop antenna arrays. Phase-front distortion was

analyzed in terms of time variations in radio range on a single

path and in first and second range differences from pairs of paths.

The cross-correlations of (1) range variations on adjacent paths,

and (2) range difference variations on both adjoining and

separated pairs of paths are investigated, including the strong

dependence of correlation on the portion of the power spectrum

included in the data. The effect of the mountaintop terrain on the

spatial homogeneity of the phase-front was examined and found

to be insignificant. A diurnal pattern in the variance of 15- minute range difference samples was observed, with minimum

variance in the early morning hours. This pattern was not observed in the range variances, nor were the range and range

difference variances significantly correlated with refractive index, air temperature, pressure or wind speed data at the lower

terminal.

TN340. Unassigned.

TN341. The long-term performance of two rubidium vapor

frequency standards, B. E. Blair and A. H. Morgan, NBS

Tech. Note 341 (June 22, 1966).

Key words: Aging; calibration (USPS); frequency

standards; gas cells; performance (long term); reliability;

rubidium; stability.

Since mid- 1961 the National Bureau of Standards has used

two rubidium vapor frequency standards as transfer or Working

Frequency Standards (WFS). The WFS provides a continuously

available frequency which is periodically calibrated in terms of

the United States Frequency Standard (USFS). This paper

evaluates these calibration data over a 44.5-month period of

time. It gives the long-term performance of the rubidium

standards in terms of the USFS, compares them with a commercial cesium-beam frequency standard, and presents their

reliability characteristics as shown by the mean-time-betweenfailures (MTBF). The calibration data are graphed with

applicable tolerance limits for the between-adjustment periods.

The average standard error of estimate about least squares lines

fitted to the frequency data is about 2 parts in 10". The rubidium

standards also show a rather consistent daily aging rate of parts

in 10'^. This would indicate that the frequency of either unit would change a few parts in 1 0'" if operated continuously for one

year without any frequency adjustments.

TN342. Hydromagnetic wave propagation near 1 c/s in the upper

atmosphere and the properties and interpretation of pc 1 micropulsations, J. A. Dawson, NBS Tech. Note. 342 (June

30, 1966).

Key words: Alfven; dispersion; hydromagnetic;

magnetosphere; multicomponent; pc 1 micropulsations;

plasma; polarization; propagation.

Part I. Hydromagnetic wave propagation near 1 c/s in the upper magnetosphere: Dispersion and polarization relations are

developed from basic considerations for a hydromagnetic wave

at about 1 c/s propagating in a cold uniform plasma. The

treatment is then extended to include the effects of ion-electron

collisions. It is shown that the approximations used are valid in the earth's magnetosphere for heights between 10,000 and

50,000 km (2.6 to 8.8 earth radii). At lower elevations the plasma must be considered as nonuniform. Above 50,000 km

the small amplitude assumption is invalid. Finally the theory is extended to include the effects of a multicomponent plasma.

Part II. The properties and interpretation of pc 1 micropulsations: A reasonable hydromagnetic model for the propagation of pc 1 micropulsations is one in which Alfven (left- hand) waves travel along field lines to reach the earth's surface at auroral latitudes and then propagate equatorward as modified

Alfven (right-hand) waves just above the ionosphere. The

isotropic right-hand wave is constrained to a duct between 400

and 2000 km above the earth by refractive processes. It is shown how many of the observed properties of pc I's can be

related to such a model. Mechanisms for the generation of pc 1 's are also discussed and it is concluded that particle instabilities are the most likely source.

TN343. Temperature-entropy diagram for parahydrogen triplepoint region, C. F. Sindt and D. B. Mann, NBS Tech. Note

343 (June 22, 1966).

Key words: Enthalpy; entropy; parahydrogen; pressure- volume; properties; temperatures; triple-point region; T-S

diagram.

The three-phase region at and near the triple point of

parahydrogen is presented on the graphical coordinates of

temperature and entropy. Isobars from 10 mm Hg to 340

atmospheres, temperatures from 11° to 23 °K and specific

volumes covering the range of from 10.5 cc/gm to 15,000 cc/gm

are included. The energy base of enthalpy and entropy are consistent with previous data published by this laboratory.

TN344. A sensitive recording NMR ultrasonic spectrometer,

L. W. James, NBS Tech. Note 344 (Sept. 7, 1966).

Key words: Boxcar integrator; nuclear magnetic resonance; phonon nuclear interaction; ultrasonics.

Instrumentation is described for automatically obtaining a continuous recording of ultrasonic absorption lines. Ultrasonic

power is added to the crystal lattice by a transducer mounted on

a single crystal of the sample. The interaction of the ultrasonics

with the nuclear spin system is recorded by using a pulse NMR

system in conjunction with a boxcar integrator. This technique

is more sensitive and provides more easily interpretable results than earlier systems.

TN345. A new near-zone electric field-strength meter, F. M.

Greene, N BS Tech. Note 345 (Nov. 1 5 , 1 966).

Key words: Device, electro-explosive ordnance; field, near- zone electromagnetic; hazards, electromagnetic radiation;

line, non-metallic electrical transmission; line, semiconducting plastic transmission; meter, electric field- strength; telemetry, novel form of. The National Bureau of Standards has recently completed the development of prototype instrumentation for measuring the

electric-field components of complex, high-level, near-zone

electromagnetic fields from 0.1 to 1000 volts per meter, at frequencies from 150 kHz to 30 MHz with a present uncertainty

of less than ±2 dB. The design of the N BS meters is based on the use of a novel form of telemetry, employing a completely nonmetallic electrical transmission line, which apparently has not been fully exploited heretofore. This avoids the perturbing

effects on the field being measured, usually caused by field44
strength meters employing metallic RF transmission lines. The

design and performance of the meter are discussed in some

detail.

TN346. On the natural shift of a resonance frequency, R. J. Harrach, NBS Tech. Note 346 (Sept. 29, 1 966).

Key words: Atomic beam; frequency shift; radiation field; resonance; thallium. The natural resonance frequency shift, caused by the transition-inducing radiation field, is examined for a magnetic

dipole transition between hyperfine structure levels in the ground state of a thallium atom. A calculation predicts, for an atomic beam experiment, a natural shift magnitude of 1 .4 parts in 10'" of the thallium resonance frequency, per mW/Oe. In the experiment, frequency shifts caused by overlap of neighboring resonances were observed, but the natural shift was unresolved,

indicating that its size is more than an order of magnitude below

the calculated value. Subsequently it has been shown that the

natural shift was inhibited by the particular radiation field mode

used in the experiment. When the theory correctly takes this mode into account, the calculated natural frequency shift is consistent with the experimental results.

TN347. A standard for accurate phase-angle measurements at audio frequencies, W. W. Scott, Jr., NBS Tech. Note 347 (Oct.

14, 1966).

Key words: Phase-angle; standard; audio frequency;

thermal voltage converter; inductive voltage divider; measurement.

A method is described for the measurement of phase angles

from 0 ° to 360 ° (except for a band ±10 ° about the 1 80 ° point)

with an uncertainty at audio frequencies of ±0.05 ° to ±0.01 °, depending on the phase-angle. The method utilizes readily available equipment which may be assembled and connected to serve as a standard. The principal advantage of this standard is in its potentially broad frequency-response; namely, 10 Hz to 10 kHz or higher. It makes use of inductive voltage dividers and

thermal voltage converters to compare voltage magnitudes,

which are related to phase-angle by the law of cosines. The

thermal voltage converters are compared with each other before

each phase-angle measurement. Their outputs are connected so

that short-time power supply variations do not affect the measurements. The repeatability of measurements with this standard at a phase-angle of 60 ° is within a range of 0.001 °. A model has been built which shows good measurement

precision, but it has not been thoroughly tested or studied at many frequencies and phase-angles for sources of error. This

report serves as a record of the development work completed on

this standard to date.

TN348. Infrared reflectances of metals at cryogenic temperatures — a compilation from the literature, P. F. Dickson and M. C. Jones, NBS Tech. Note 348 (Oct. 14, 1966).

Key words; Compilation; cryogenic; infrared; metals;

reflectance.

Spectral and total reflectances for metals at cryogenic

' temperatures in the infrared wavelength region are compiled

from the literature. Information concerning sample preparation

and purity, radiation source, and methods of reflectance measurements are also presented. Observations regarding the

effects on reflectance of temperature, oxide layer, wavelength,

and sample preparation are given.

TN349. The design and operation of a high-voltage calibration

facility, W. W. Scott, Jr., NBS Tech. Note 349 (Nov. 10, 1966).

Key words: Alternating-current; calibration; direct-current;

high-voltage; ratio; safety; standards enclosure;

transformer; voltage-divider; voltmeter. The high-voltage calibration facility, in operation for seven

years at the National Bureau of Standards Radio Standards

Laboratory (RSL) but now at NBS Washington, is described

with emphasis on several novel construction features and

calibration techniques. The more usual calibration techniques

are also outlined for the assistance of those personnel in standards laboratories assigned the task of calibrating with high accuracy, electrostatic voltmeters, resistive dividers, and

potential transformers at high voltage. Precautions, based on

experience in the calibration and use of high voltage standards,

are given so that certain errors may be avoided by the users.

TN350. The viscosity and thermal conductivity coefficients of

dilute nitrogen and oxygen, G. E. Childs and H. J. M. Hanley,

NBS Tech. Note 350 (Oct. 3 1 , 1966).

Key words: Dilute gases; nitrogen; oxygen; transport

coefficients; Lennard-Jones; Kihara; Exp: 6; Morse

potential functions; Eucken correction; correlation. The coefficients of viscosity and thermal conductivity for

dilute nitrogen and oxygen were examined using a method

proved suitable for argon. Given the kinetic theory expressions

for the transport coefficients, this method indicates a selection of a potential function and its parameters to correlate theory with

experimental data. The potential functions chosen were the Lennard-Jones, Kihara, Exp: 6 and the Morse. It was found that the Kihara was most suitable and theoretical viscosity

coefficients were computed with this function. The usual correction to the kinetic theory equation for thermal

conductivity, the Eucken correction, was found not to be

sufficient and it was decided to use an empirical polynomial

equation to correlate the thermal conductivity coefficients. Tables of the transport coefficients for both gases are given

between 100 and 1000°K.

TN35I. Discussion of errors in gain measurements of standard

electromagnetic horns, R. W. Beatty, NBS Tech. Note 351

(Mar. 1967).

Key words: Antennas; calibration; comparison; effective aperture; electromagnetic horns; gain; measurement;

microwave; mismatch errors; Rayleigh distance; standard

gain horns.

In setting up a calibration service for measuring the gain of

standard electromagnetic horns, one needs a reference horn in which one has developed a high degree of confidence. Although

it is possible to calculate the gain of horns of certain design,

confidence can be increased by carefully measuring the gain.

This note examines a method for measuring the gain of two

identical horns, listing the assumptions made in making such a measurement. The theory of 2-port waveguide junctions is applied to the analysis of the measurement technique. The

method is shown to be essentially an attenuation measurement

which has additional sources of error. Although these errors are not analyzed and evaluated in this note, the problem is perhaps more clearly stated than it was previously. The mismatch error

in comparing two horns as receiving antennas is analyzed. Data

is given on the aperture efficiency of standard horns which

indicates that improvements in the design of such horns are

feasible. It is concluded that, at present, an uncertainty limit of

the order of tenths of decibels seems realistic, but hundredths of

decibels seems unattainable until further refinements are made

both in the standard horns themselves and in the measurement

techniques.

45
TN352. The viscosity and thermal conductivity coefficients of

dilute neon, krypton, and xenon, H. J. M. Hanley and G. E. Childs, NBS Tech. Note 352 (Mar. 23, 1967).

Key words: Dilute gases; neon; krypton; xenon; transport

coefficients; correlations; m-6; Kihara; Exp: 6, Morse;

potential functions.

The coefficients of viscosity and thermal conductivity for

dilute neon, krypton, and xenon were examined by a method

already proved successful for dilute argon, oxygen, and nitrogen.

This method selects a suitable potential function, and its parameters, which is then used to correlate theory with

experimental data, given the kinetic theory expressions for the transport coefficients. The method has recently been expanded

and generalized and the results of this general study are applied

in this note. The potential functions examined were members of

the m-6, Kihara, Exp: 6, and Morse families. It was found that the Kihara was most suitable for neon, and the m-6, with m=17

and m=24, was most suitable for krypton and xenon,

respectively. Viscosity and thermal conductivities were

calculated from these functions and tables are given between 100

and 1000 °K.

TN353. Connector for saturated standard cells, J. J. Barth, NBS

Tech. Note 353 (April 2 1 , 1 967).

Key words: Connector; electromotive force; oil baths; standard cells; thermoelectric.

This paper describes a connector used for making electrical connections to saturated standard cells in oil baths. The

connector has at least three advantages over other methods in common use. These advantages are namely: (1) it does not generate thermoelectromotive forces; (2) it allows cell racks to be placed close together in the bath; and (3) it is economical to fabricate since it can be made from a common inside caliper.

TN354. The single-engine Claude cycle as a 4.2 °K refrigerator, R. C. Muhlenhaupt and T. R. Strobridge, NBS Tech. Note 354

(June 1, 1967).

Key words: Claude; cryogenics; refrigeration.

The performance of the 4.2 °K Claude-cycle refrigerator has

been computed taking into account the efficiencies of the various

components. The results are presented in graphical form. These

charts give the input power requirements, mass flow rates for both the compressor and expander, pertinent temperatures, and

allow selection of the optimum high pressure for a given set of

component characteristics.

TN355. Correlations for predicting leakage through closed valves,

J. Hord, NBS Tech. Note 355 (Aug. 1, 1967).

Key words: Leak detection; leak flow rates; leak rates; leakage through valves; predicting leak rates; seal leakage;

valve seat leakage.

Safety, convenience, and economy often demand the inference

of leakage of a given fluid from known leakage of another test fluid across valve seats, welded and threaded fittings, seals, etc. The temperatures of the fluids also may be different. An

example is the prediction of gaseous hydrogen leakage at 20 °K

from test data obtained with nitrogen gas at 77 °K. Various flow

formulae (molecular, transition, and continuum) are examined,

and two simple methods of correlating leakage for single-phase

fluids are deduced. The correlations obtained (excluding

transition flow through long channels) indicate the leakage is inversely proportional to the square root of the density, or

inversely proportional to the absolute viscosity, of the fluid. Thus, for gases, the leakage is directly proportional to the sonic

velocity of the gas. The proper relationship must be established

by experiment for each valve, fitting, etc.

TN356. Comparison of incompressible flow and isothermal

compressible flow formulae, J. Hord, NBS Tech. Note 356

(Aug. 17, 1967).

Key words: Compressible flow; flow comparison; fluid flow; incompressible flow; mass flow; pressure drop.

Mass flow formulae for incompressible and "modifiedincompressible" flow are compared with the isothermal

compressible flow relation under the following conditions: The

gas flow is steady, isothermal, and fully developed in a horizontal

pipe of constant cross section with a prescribed static pressure drop (P1-P2). The comparative data are limited to static pressure

ratios (P2/Pi)>l, and subsonic isothermal flow. Laminar and

turbulent flows are treated. Under the limitations of the comparison, modified-incompressible flow and isothermal gas flow relations are identical when fL/2D > ln(Pi/P2). Graphical

plots idicate the degree of approximation or error involved in using incompressible relations to solve compressible flow

problems. Pressure losses due to end effects are briefly

discussed.

TN357. Signal design for time dissemination: some aspects, J. L. Jespersen, NBS Tech. Note 357 (Nov. 2, 1967).

Key words: HF; noise; satellite; synchronization; time and

frequency dissemination; VHP; VLF.

The purpose of this paper is to discuss, in a general way, some

problems of time signal dissemination in a noisy environment.

Most of the paper applies to any timing system, but particular

emphasis is given to a CW two-frequency system. This is done

for two reasons: first, as will be shown, a two-frequency CW

system evolves naturally from fundamental considerations to meet certain user requirements; and second, a two-frequency

VLF system is being investigated experimentally at the present

time.

TN358. A review of studies made on the decade fluctuations in the

earth's rate of rotation, W. R. Davey, NBS Tech. Note 358

(Oct. 16, 1967).

Key words: Core-mantle coupling; decade fluctuations; dynamo theory; earth's core; geomagnetism; rotation of the

earth; westward drift.

Studies of variations in the length of the day (l.o.d.) on the order of a few milliseconds over the period of a few decades are

briefly reviewed. In this connection, studies of the dynamo

theory of geomagnetism, the westward drift of the magnetic field, and electromagnetic core-mantle coupling preface the theory of

the decade fluctuations in the l.o.d.

TN360. On the selection of the intermolecular potential function: Application of statistical mechanical theory to experiment, H.J. M. Hanley and M. Klein, NBS Tech. Note 360 (Nov. 20.

1967).

Key words: Correlation; equilibrium properties;

experimental data; intermolecular potential function;

theory; transport properties.

We have developed a method here to evaluate quantitatively the relationship between model intermolecular potential

functions and macroscopic experimental properties.

Specifically, we have studied the function families: m-6, Kihara,

exp:6, and Morse, and the properties: viscosity coefficient, diffusion coefficient, second virial, and Joule-Thomson

coefficient. Our method is not restricted to these functions and

properties; it is valid for any function and any property provided

the appropriate theoretical expressions are available. The principal conclusions from this work are: 1. A

temperature range exists (around room temperature for most

46
substances) in which data are completely insensitive to the

potential function. This range makes is possible to quantitatively

define what is meant by "high" or "low" temperatures. These

definitions are most important when extrapolation of data arises.

2. The function families studied are essentially equivalent. 3. More than one function is required to represent data over a range

of about 1000 °K. 4. We have estimated the experimental error which can be tolerated if experimental data are to be used to

select a potential function. The conclusions are experimentally

verified for both transport and equilibrium properties.

TN362. Thermodynamic properties of He''-He^ solutions with

applications to the He'-He^ dilution refrigerator, R. Radebaugh,

NBS Tech. Note 362 (Dec. 29, 1967).

Key words: Cryogenics; dilution refrigerator; enthalpy;

entropy; Fermi-Dirac gas; helium-3; helium-4; liquid;

mixtures; osmotic pressure; quantum fluid; specific heat; thermodynamic properties.

The thermodynamic properties of liquid He-'-He^ solutions

between 0 and 1.5 °K are calculated by using the weakly

interacting Fermi-Dirac gas model for He' in He^. Certain

experimental data below about 0.4 °K are used to evaluate some

of the parameters in the model. The properties of both He' in He^ and the total solution are calculated for concentrations of

He-' up to 30 percent. All experimental data agree very well with

the calculated results, although little data exist below 0.4 °K. The calculated properties are used to analyze the behavior of the He'-He-* dilution refrigerator in both the continuous and singlecycle processes. The maximum heat absorption below about

0.04 °K is found to be 82 T- joules per mole of He^ circulated. The effect of an imperfect heat exchanger and He^ circulation on

the refrigeration capacity is discussed. An analysis of two new

types of single-cycle processes is also given.

TN400. Electrochemical analysis: Studies of acids, bases, and salts by Emf, conductance, optical, and kinetic methods, July 1965 to June 1966, Edited by R. G. Bates, NBS Tech. Note 400 (Sept.

6, 1966).

Key words: Acidity; analytical chemistry; conductance;

deuterium oxide; dissociation processes; electrochemistry;

electrolytes; Emf; indicators; isopiestic; vapor pressure;

methanol-water solvents; thermodynamics.

This survey of the activities of the Electrochemical Analysis

Section, Analytical Chemistry Division, covers the period July

1965 to June 1966. An attempt is made to summarize a year's progress on the technical projects of the Section in such a way as

to stress the program and capabilities of the organizational unit as a whole. A description of facilities and equipment is presented and the directions of new programs are indicated. Brief summaries of the several lines of work now under way are

given. The main areas include the study of acidity measurement

in water, deuterium oxide, and methanol-water solvents, along

with the development and certification of standard reference

materials with which acidity scales in these media can be

defined. Solvent effects and isotope effects are being studied,

and equilibrium data for certain systems of analytical interest have been obtained. Progress on a conductometric method for determining traces of water is reported, and the thermodynamic

properties of some salt mixtures have been measured by a vapor

pressure method. Kinetic methods for trace analysis have been

examined, and a new lot of potassium hydrogen phthalate

(Standard Reference Material 84h) has been certified for use as an acidimetric standard. The survey concludes with lists of the members of the Section staff, publications and manuscripts

produced during the year, talks given by the staff, and committee

assignments.

TN401, Activities of the NBS Spectrochemical Analysis Section,

July 1965 to June 1966, Edited by B. F. Scribner, NBS Tech.

Note 401 (Sept. 30, 1966).

Key words: Analysis; arc temperature; atomic absorption

spectrometry; analog computer; bibliography; computer;

electrodeposition; electron back scatter; electron probe

microanalyzer; emission spectroscopy; laser probe; mass

spectroscopy; photographic photometry; plasma jet;

preconcentration; pulse height analyzer; spectrochemical

analysis; spectroscopy; standard reference materials; timeshared computer; x-ray spectroscopy.

A summary is given of the activities of the NBS

Spectrochemical Analysis Section for the period from July, 1965

through June, 1 966, during which the move into the new facilities at Gaithersburg, Md. was made. Activities in optical

spectrometry mcluded development of programs for calculations on a time-sharing computer, measurement of arc temperatures,

applications of the laser probe and the plasma jet, and studies on

atomic absorption spectrometry. In x-ray spectroscopy, there have been some modifications of equipment, improvements in computation methods, and several applications. Improvements

and additions were made to the electron probe analyzer, along

with studies on measurement techniques, including nondispersive analysis and computation procedures. The spark- source mass spectrometer has also been modified, and a new

analog computer has been built and tested for reduction of

photographic plate data; applications of this instrument to analyses of pure materials are described. Enrichment methods

are being studied for the analysis of pure materials by emission

spectroscopy, particularly with an electrodeposition technique.

Homogeneity studies and analyses have been performed in the development of standard reference materials. Other activities included analyses of samples to assist other NBS groups and

government agencies, and literature surveys. Listings are given

of 20 publications and 26 talks by members of the Section during

the year.

TN402. Analytical coordination chemistry: Titrimetry,

gravimetry, flame photometry, spectrophotometry, gas

evaluation and isotopic preparations, July 1965 to June 1966,

Edited by O. Menis, NBS Tech. Note 402 (July 21, 1967).

Key words: Spectrophotometric fitration; controlled

potential coulometric; molybdenum; homogeneous

precipitation; aluminum; beryllium; thermoanalytical

standards; tricalcium silicate; spectrophotometry;

antimony; high precision determination of nickel; simultaneous determination copper; cobalt; "releasing

agents" in flame emission and atomic absorption;

magnesium; ferrous SRMs; stoichiometric mixtures

uranium oxide; isotope ratio determinafion.

Studies in four areas of analytical chemistry: titrimetry,

gravimetry, flame emission and atomic absorption, and solution

spectrophotometry, are described from the standpoint of

analytical coordination chemistry and applications to NBS

standard reference materials. In the first two competences these

investigations dealt with spectrophotometric titrations and

homogeneous precipitation methods. Advances are described in the latter two areas through the unique applications of ternary

complexes, displacement reactions in metal-ligand systems and

the use of complexing media as "releasing agents". This

approach is described for the determination of nanogram

quantities of Sb, Cu, Ni and Au in very high purity zinc by both

spectrophotometric and flame procedures. Also in flame

emission and atomic absorption a current table is presented for the detection limits of 70 elements. Progress of a new method is reported for the simultaneous determination of Ni, Cu and Co by

the dimethylglyoxime method. Descriptive tables of results are

47
also given for ferrous, non-ferrous and ceramic materials which were analyzed by one of the four competences. In another

analytical area dealing with the analysis of gases in metals results of homogeneity and precision studies lead to certification of

three new ferrous SRM's for their oxygen content. Also

reported are the initial investigations of pyrohydrolytic

separations of fluoride, nitrides and borons, separations of

molybdenum from tungsten, controlled potential coulometric

titration of molybdenum, and a description of improved

instrumentation in flame emission and atomic absorption.

Finally data are given on the preparation of stoichiometric

mixtures of uranium oxide of varied isotopic composition and a

list describing the variety of special analyses is included.

TN403. Microchemical Analysis Section: Summary of activities, July 1965 to June 1966, Edited by J. K. Taylor, NBS Tech.

Note 403 (Sept. 1, 1966).

Key words: Atomic weights; coulometric analysis; gas

analysis; mass spectrometric gas analysis; microchemical

analysis; polarographic analysis; standard reference

materials, analysis of; stoichiometry.

This report describes the scientific programs and research

activities of the Microchemical Analysis Section of the Analytical Chemistry Division of the NBS Institute for Materials Research during the period July 1965 to June 1966. General activities are reported in the areas of gas analysis by mass spectrometry, polarography, coulometry, stoichiometry,

and classical microchemical analysis. Research

accomplishments described in some detail include: improvements in the sensitivity of gas analysis using high- pressure mass spectrometry; analysis of deuterated compounds

by mass spectrometry; comparative polarographic analysis of

high precision; polarographic methods for trace and ultra-trace determination of a number of elements; highly accurate coulometric iodimetric titration; a highly precise method for determination of magnesium based on its final weighing as magnesium sulfate; and a number of microchemical procedures

for the analysis of a variety of materials.

TN404. Radiochemical analysis: Activation analysis,

instrumentation, radiation techniques, and radioisotope

techniques, July 1965 to June 1966, Edited by J. R. DeVoe,

NBS Tech. Note 404 (Sept. 30, 1966).

Key words: NBS reactor; NBS Linac; Cockroft-Walton

generator; digital computers; activation analysis; standard

reference materials; photo-neutron reactions; flux monitors;

Cu, Se, Al, V in irons and steels; homogeneity testing;

pneumatic rabbit sensor; Mossbauer spectroscopy; tin standard for chemical shift; PARLORS program for Mossbauer spectra; Mossbauer instrumentation; Mossbauer

laboratories; radiometric trace chromatography;

radioisotope dilution; substoichiometry by controlled

potential coulometry; radiochemical separations; theoretical detection limits for activation analysis; CLSQ program for multicomponent decay; solid state detectors; electronic data

handling.

This is the third summary of progress of radiochemical

analysis which encompasses the worl< of both the Radiochemical

Analysis and Activation Analysis Sections of the Analytical

Chemistry Division at the National Bureau of Standards.

Pertinent information on the irradiation facilities of the nuclear

reactor, Linac, and Cockroft-Walton generator are described. A

number of analyses of standard reference materials by activation analysis are described (e.g., Cu in cast iron, SRM 82b; Se in selenium steel, SRM 1170; Al in steel, SRM 14e; and V in stainless steel, SRM 73c). Various aspects of the technical

problems in activation analysis such as its use for homogeneity

testing, production of suitable flux monitors, and experimental

design with respect to increasing selectivity (such as by using

variable neutron energy) and reducing systematic and random

errors, are presented. A realistic procedure for estimating

sensitivity and for designing the analysis to optimize the detection limit is described. A computer program that resolves complex decay curves utilizes parameter changes convenient for the conversational aspect of "time sharing" digital computers. A

highly specific radiochemical separation for copper using a type

of amalgam exchange is described.

Description of specialized data handling equipment as well as information on a fast rise preamplifier, solid state detector

system, and other special instruments such as a pneumatic

transpoil system rabbit sensor, are presented.

A description of the laboratories used in Mossbauer

spectroscopy is presented. Special problems in radiation detection for use in a spectrometer are also described. The

Standard Reference Material Program for chemical shift in Mossbauer spectroscopy is discussed with particular reference

to the search for a tin standard. The computer program. "Parlors

M," that is used for resolving complex Mossbauer spectra is presented in its entirety in Appendix II. The use of thin layer chromatography in conjunction with

radioactive reagent analysis for trace elements is described.

Substoichiometric radioisotope dilution continues to be studied

by evaluating systematic and random errors, as well as by

developing the technique from physio-chemical principles such

as controlled potential coulometry.

TN405. Organic Chemistry Section: Air pollution studies; kinetic behavior of sugars in solution carbon-14- and tritium-labeled carbohydrates; characterization of chemical structures; phenylhydrazono-phenylazo tautomerism; synthesis of research

materials, cyclopentitols and related substances; novel research

materials; standard reference materials (organic), July 1965

through June 1966, Edited by H. S. Isbell, NBS Tech Note

405 (Sept. 30, 1966).

Key words: Air-pollution studies; oxidation of polycyclic

aromatic hydrocarbons; sugars in solution; conformational

analysis; carbon-14- and tritium-labeled carbohydrates;

large-scale paper chromatography; phenylhydrazonophenylazo tautomerism; cyclopentitols and related substances; unsaturated alditols; infrared spectra of

acylamido derivatives; carbohydrate reference materials; metallo-organic standard reference materials.

This report describes work in progress in the Organic

Chemistry Section of the Analytical Chemistry Division of the NBS Institute for Materials Research. It includes certain

historical material, presented to give perspective to the overall program. The following research areas are discussed: air- pollution studies, kinetic behavior of sugars in solution, carbon14- and tritium-labeled carbohydrates, characterization of

chemical structure; phenylhydrazonophenylazo tautomerism,

synthesis of research materials: Cyclopentitols and related substances, novel research materials, and standard reference

materials.

TN406. X-ray wavelength conversion tables and graphs for

qualitative electron probe microanalysis, K. F. J. Heinrich and

M. A. M. Giles, NBS Tech. Note 406 (Sept. 25, 1967).

Key words: Electron probe microanalyzer; wavelengths; x- ray emission; x-ray spectrometers.

Tables and graphs have been constructed for electron probe x- ray spectrometers equipped with crystal changers and calibrated

for LiF crystals in angstroms. These tables indicate the equivalent reading for the lines which can be normally expected

48
to appear in wavelength scans using the following crystals: LiF,

EDDT, ADP, KAP, and Pb stearate (LSD). The readings were

extracted from the tables of E. W. White, et al. The tables are arranged by the atomic numbers of the emitting elements; the graphs show the readings for observable lines as a function of

atomic number for each of the aforementioned crystals. A

suggested method for using the tables and graphs is included.

TN408. Superconductive materials and some of their properties,

B. W. Roberts. NBS Tech. Note 408 (Sept. 26, 1966).

Key words: Bibliography; compilation of data; composition;

critical field; critical temperature; crystallographic data; low

temperature; superconductivity.

This is a noncritical compilation of data on superconductive

materials that has been extracted from the literature published

between October 1963 and December 1965. The properties

concerned are composition, critical temperature, critical field crystallographic data, and lowest temperature tested for superconductivity. The compilation also includes bibliography,

general reference review articles and a special tabulation of high

magnetic field superconductors.

TN409. Fortran programs for the calculation of Wigner 3j, 6j, and

9j coeiTlcients for angular momenta « 80, R. S. Caswell and L. C. Maximon, NBS Tech. Note 409 (Nov. 15, 1966).

Key words: Fortran program; Wigner coefficients; quantum

theory of angular momentum; 3j coefficient; 6j coefficient;

9j coefficient; Clebsch-Gordan coefficients.

Fortran II and Fortran IV programs are given for the calculation of Wigner 3j, 6j and 9j coefficients containing

individual angular momenta less than or equal to 80. The large

numbers, resulting from the factorials which appear in the expressions for these coefficients, are handled by taking

logarithms and performing most of the pertinent arithmetic with

the logarithms. The alternating series involved in the expressions for the 3j and 6j coefficients are summed

arithmetically in double precision. We present two versions of

the basic program for the calculation of these coefficients (each

version being given both in Fortran II and in Fortran IV). All programs are called as single-precision Fortran functions. The

difference between Versions I and II is in the internal structure of these programs. In Version I, only the series summation is in double precision, resulting in a faster program which occupies

less memory in the computer, the computation time being of the order of 0.00 1 to 0.0 1 sec per 6j and 0. 1 to 1 sec per 9j. Version

II, being entirely in double precision internally, is much more

accurate (the errors being of the order of one percent of the

errors in Version I), but the computation time for a given

coefficient is approximately 50% greater than in Version 1. Information relative to the accuracy and memory requirements

of the two versions of the program is provided, and Fortran II and IV lists of the programs and calling instructions are given.

TN410. Improved Fortran program for single particle energy

levels and wave functions in nuclear structure calculations, R. S. Caswell, NBS Tech. Note 410 (Sept. 30, 1966).

Key words: Eigenvalues; eigenfunctions; energy levels; wave functions; single particle shell model.

An improved program has been developed for numerical

calculations of single particle energy levels and wave functions

for Woods-Saxon or other real potential wells. The program is designed to be used as a subroutine of a larger program for nuclear structure calculation but may be used separately if desired. Improvements over the previous program include: (1) for bound states the wave function is calculated by integrating

outward from zero radius and inward from a maximum radius

beyond the nuclear potential well with matching at an

intermediate radius; (2) a first order correction has been made to the starting conditions at small radius for the integration of the wave function; (3) a large step size is used until the calculation

has nearly converged on the eigenvalue; then a small step size is used to provide maximum accuracy; (4) the correction of a small

error in the Kutta-Runge integration procedure has been made.

As a result of the changes the program is approximately five times faster than the previous version. Checks with harmonic

oscillator potentials give an accuracy of .01% in the energy level values. Listings of Fortran II and Fortran IV versions are given.

TN4 1 1 . Methods for performance-testing of electro-mechanical pressure transducers, P. S. Lederer, NBS Tech. Note 411

(Feb. 9, 1967).

Key words: Electro-mechanical; pressure; transducer;

calibration; performance; test method; dynamic calibration and telemetering.

This publication describes methods in one particular program

at NBS for the performance-testing of electro-mechanical

pressure transducers (such as telemetering transducers used in aerospace testing). It covers static and dynamic calibration procedures in detail, delineates environmental and other tests, and describes the test equipment used. Examples of dynamic

calibration results are interpreted.

TN412. Quantum mechanical calculations of the second virial coefficients for hydrogen, M. E. Boyd and S. Y. Larsen, NBS

Tech. Note 412 (Apr. 10, 1967).

Key words: Second virial coefficient; quantum mechanics;

hydrogen; equation of state; statistical mechanics;

intermolecular potential.

Quantum mechanical second virial coefficients of dilute ortho

and para hydrogen have been calculated for the case of a Lennard-Jones potential. These computations cover the temperature range from 0 °K to 80 °K. Special attention is paid

to the behavior of the Boltzmann and exchange contributions.

The purely statistical contribution to the ortho-para difference is shown to vanish to three decimal places by about 10.5 °K. Comparison with experimental data indicates that considerable

improvement in the potential function and inclusion of nonspherical terms will be required at the low temperatures

considered here.

TN413. The solid system. II. Numeric compression, P. A. D. deMaine, K. Kloss, and B. A. Marron; and The solid system.

III. Alphanumeric compression, P. A. D. deMaine, B. A. Marron, and K. Kloss, NBS Tech. Note 413 (Aug. 15, 1967).

Part I. Key words: Numeric compression; information handling;

high-speed information transmission; information storage

and retrieval; systems analysis.

This part of NBS Technical Note 413 describes the general

NUMERIC COMPRESSOR (NUPAK) Algorithm for automatically compressing (encoding) or decoding compressed

numerical information, which, may of course have come from

graphical information. The amount of compression achieved is determined by the "lowest limit of significance," the range, and

the sequential patterns of the data to be stored. The encoded

information can be stored in memory or on external storage

devices in a small fraction of the space normally required, and

can be expanded (decoded) item-by-item whenever needed by

the system.

Part II. Key words: Alphanumeric compression; information

49
handling; high-speed information transmission; information

storage and retrieval; systems analysis.

An algorithm for compressing alphanumeric information is described. Unlike other methods which depend upon frequency

of occurrrence of words in a particular class of publications, this scheme is language and content independent since the information for compression is obtained from the text itself The

compressed bit stream is preceded by sufficient information for automatic reconstruction of the original bit stream whenever the system requires it. Even with this additional information

required for expansion, compression rates approaching 40%

have been achieved. Because this ALPHANUMERIC

COMPRESSOR (ANPAK) is fully automatic and self- organizing, it can operate on information which has already been

compressed via the NUMERIC COMPRESSOR (NUPAK).

TN414. Quantitative methods for management, G. Suzuki, NBS

Tech. Note 414 (May 23, 1967).

Key words: Operations research; quantitative analysis;

management; decision-making; education.

An elementary treatment of some of the better known and

widely used analytical methods in operations research/systems

analysis. The material is presented in a manner which attempts

to indicate why quantitative methods are useful in managerial

decision-making situations. Some basic references are provided.

TN4 1 5 . Thermal radiation property measurement techniques, S. T. Dunn, J. C. Geist, D. G. Moore, H. E. Clark, and J. C. Richmond, NBS Tech. Note 415 (Apr. 27, 1967).

Key words: Averaging spheres; diffuse reflectance; emissivity; emittance; flux averaging devices; infrared reflectance; spectral reflectance; spectral emittance;

specular reflectance.

This is an armual summary report of work completed on NASA Contract R-09-022-032. The work comprised (1) completion of the development and calibration of a rotating

cylinder procedure for measuring normal spectral emittance of

non-conducting materials at temperatures in the range of 1 200 to 1600 °K, (2) analysis and calibration of an ellipsoidal mirror

reflectometer, and (3) a study of the relation between surface roughness and geometric distribution of flux reflected from a

surface.

TN416. Study of a Halpern-type 477 neutron detector, H. M.

Gerstenberg and E. G. Fuller, NBS Tech. Note 416 (June 12,

1967).

Key words: Detector; efficiency; four-pi; Halpem; neutron; photoneutron; response; yields.

The response to various neutron spectra of a 2-inch diameter

BFs proportional counter in a Halpern-type geometry has been

studied as a function of moderator thickness. Neutron sources used were a calibrated RaDBe(a,n) source and a series of

photoneutron sources using a number of bremsstrahlung spectra.

The reactions used were "^0(y,n), •''P(y,n) and d(y,n). For these sources absolute neutron yields were determined either from the residual /3+ activity or from the known cross section and the absolute bremsstrahlung intensity. Using these empirical data a

final detector with 13 BF3 counters was constructed. Over the

spectral range covered by the above sources the measured

efficiency for counting neutrons of the final detector was 9.6 percent with an estimated uncertainty of ±0.5 percent,

independent of spectrum. The detector was used to measure the neutron yields from Pb, Au, Ta, Ho, Ag, Cu, Co, Ca, P, Al, O

and C for a series of bremsstrahlung energies between 12.0 and

29.0 MeV. These yields were compared with those calculated from previously published neutron yield cross sections. The

data indicate that previously reported discrepancies in neutron

yield data can probably be traced to the determination of neutron

detector efficiencies. TN418. Radiometric methods for measuring laser output, D. A. McSparron, C. A. Douglas, and H. L. Badger, NBS Tech.

Note 418 (Nov. 1967).

Key words: Laser; laser energy measurement; optical attenuator; photoelectric photometry; radiometric

calibration; radiometry.

The output of pulsed lasers may be measured with reasonable

accuracy by modifications of established radiometric methods.

The receiver, thermopile or phototube, is used ballistically. It is calibrated by an incandescent-lamp standard of spectral

irradiance. The laser beam is attenuated to make its irradiation on the receiver comparable to that from the calibrating source. Attenuation is accomplished by intercepting the entire laser beam on a diffusely reflecting surface. The attenuation factor is determined from direct measurement of the reflectance of this diffusing surface and the geometric constants of the system. The

accuracy of the measurement of laser output is dependent upon

the accuracy of calibration of the standard of spectral irradiance

and the accuracy with which the spectral sensitivity of the

receiver, the spectral transmittance of the band-pass filters, and

the reflectance of the diffuser can be determined. Measurements

made with different photoelectric receivers agree to about 1.5%

using a 1/4-joule pulsed ruby laser as a source. Total uncertainty

is estimated to be about 5%. Measurements made using these radiometric methods have been compared with calorimetric

measurements and a discrepancy of 9% was observed.

TN420. Drawings of micrometer U-tube manometers for the ranges up to 100 mm of mercury, A. M. Thomas and J. L. Cross, NBS Tech. Note 420 (Aug. 26, 1967).

Key words: Manometer; micrometer; u-tube; vacuum; medium-vacuum measurements.

Drawings with sufficient detail are presented so that micrometer U-tube manometers for use with mercury, oil, and

water may be constructed. Measurements made with the oil manometer have an uncertainty of about 4 x 10~» mm of Hg plus one part in 10^ of the reading. Measurements made with the mercury manometer have an uncertainty of about 4 x 1 0-^ mm of

Hg plus eight parts in 10= of the reading. The operation and an

error analysis are described elsewhere.

TN421. Radiochemical analysis: Nuclear instrumentation,

radiation techniques, nuclear chemistry, radioisotope techniques

July 1966 through June 1967, Edited by J. R. DeVoe, NBS

Tech. Note 421 (Nov. 1967).

Key words: Computers; cross sections; detection limits for analysis; flux monitors; Mossbauer instrumentation;

Mossbauer spectroscopy; NBS Linac; nickel-61;

PARLORS program for Mossbauer spectra; photoneutron

reaction; solid state detectors; standard reference materials;

tin standard for chemical shift.

This is the fourth summary of progress of the Radiochemical

Analysis Section of the Analytical Chemistry Division at the National Bureau of Standards.

The section's effort comprises four major areas: Mossbauer

spectroscopy, nuclear chemistry, nuclear instrumentation, and

the application of statistics in nuclear and analytical chemistry.

A new design of transducer which is more compact than the previous design has been made so that low temperature

experiments can be more easily performed. A method of

simultaneously measuring two spectra with a single transducer

has been devised. A single line nickel-61 source has been made

50
and the magnetic moment of the excited 5/2 state has been

measured with this source. Efforts have continued on the

interpretation of the spectral parameters and their relation to structure analysis. Studies are continuing on the production of a standard for chemical shift of tin compounds.

Equipment is in the final state of assembly and initial testing for measuring cross sections of reactions such as (y.-'^He) or (y/He) by mass spectrometry of the reaction products.

The precision of an analytical method must be carefully used

when expressing a detection limit. In addition, care must be

taken to be definitive about the meaning of a limit of detection. A suggested procedure for uniformity in reporting these often used terms is presented in this report.

The practical operation of Ge{Li) and Si(Li) detectors has

been evaluated. It is found that careful control of the preamplifier noise and response is required for optimum

performance.

A study of the precision and accuracy of gamma-ray excited x- ray fluorescence was made. Using as a basis the analysis of

certified Standard Reference Materials, an improvement of a

factor of two in precision was measured. The major advantage

concluded from this work is that if rapid analysis requiring

portability is desired, the radioisotopic source approach is useful.

TN423. Electrochemical Analysis Section: Summary of activities, July 1966 to June 1967, Edited by R. G. Bates, NBS Tech.

Note 423 (Oct. 1967).

Key words: Acidity; analysis; conductance measurements;

electrochemical analysis; electrochemistry of solutions;

glass electrodes; medium effects; pH measurements.

This survey of the activities of the Electrochemical Analysis

Secfion, Analytical Chemistry Division, covers the period July

1966 to June 1967. An attempt is made to summarize a year's progress on the technical projects of the Section in such a way as

to stress the program and capabilities of the organizational unit as a whole. A description of facilities and equipment is presented, and the directions of the programs are indicated. Brief summaries of several lines of work now under way are

given. The main areas include the measurement of acidity with progress toward the establishment of standards for pH, pH*, and

pD being reported. Studies of the behavior of glass electrodes in deuterium oxide are described and solvent effects on ionic processes are discussed. Equilibrium data for certain ionic systems have been obtained, modifications of a precision

conductance bridge are described, and a method for titrating

hydrogen fluoride in dimethylformamide is outlined. The survey

concludes with lists of the members of the Section staff, publications and manuscripts produced during the year, talks given by the staff, and committee assignments.

TN425. Microchemical Analysis Section: Summary of activities, July 1966 to June 1967, Edited by J. K. Taylor, NBS Tech

Note 425 (Oct. 1967).

Key words: Coulometric analysis; gas analysis; mass

spectrometric gas analysis; microchemical analysis; null- point potentiometry; polarographic analysis; standard

reference materials, analysis.

This report describes the research activities and scientific programs of the Microchemical Analysis Section of the Analytical Chemistry Division of the NBS Institute for Materials Research during the period July 1966 to June 1967. General activities are reported in the areas of gas analysis,

polarography, potentiometry, coulometry, chemical microscopy,

and classical microchemical analysis. Research

accomplishments described in some detail include the following;

high pressure mass spectrometry; high precision differential

polarography; an improved coulometric technique for titration of

halides; developments in micro null-point potentiometry;

techniques for the accurate weighing of small liquid samples. A

number of microchemical procedures which have been

developed for the analysis of a variety of materials are also included.

TN426. Analytical Mass Spectrometry Section: Summary of

activities, July 1966 to June 1967, Edited by W. R. Shields,

NBSTech. Note 426 (Sept. 15, 1967).

Key words: Instrumentation; isotopic analyses; mass

spectrometry; procedures.

This report describes the advances in instrumentation and the research activities of the Analytical Mass Spectrometry Section

during the period July 1966 to June 1967. Advances in instrumentation include the construction of a

multi-stage mass spectrometer, a high vacuum beam valve, a Z

focussing lens, a re-designed collector, a filament degas chamber,

and new equipment for sample drying. The new facilities at Gaithersburg are described.

Elements studied during this period include: B, Cr, Pb, Rb, U,

and Pu. Chemical procedures are given for B, Cr, Pb, and Pu; mass spectrometric procedures are given for B, Cr, Pb, Pu, Rb,

andU.

TN427. Organic Chemistry Section: Air pollution studies; characterization of chemical structures; synthesis of research

materials; novel research materials; isotopic methods for analysis of carbohydrates; occurrence, preparation, and

properties of naturally occurring monosaccharides (including 6- deoxy sugars); standard reference materials (organic), July 1966

through June 1967, Edited by R. Schaffer, NBS Tech. Note

427 (Oct. 1967).

Key words: Air pollution studies; characterization of

chemical structures; disaccharide of d-lyxofuranose;

infrared absorption methods for analysis of carbohydrates;

naturally occurring monosaccharides and 6-deoxy sugars; oxidation of polycyclic aromatic hydrocarbons;

phenylhydrazono-phenylazo tautomerism; quebrachitol,

levo-inositol; standard reference materials; 1,2-0- isopropy lidene-j8- L-idofuranose ; 2 ,3-0-isoptropy lidene-/3-d- threo-pentulofuranose.

This report describes work in progress in the Organic

Chemistry Section of the Analytical Chemistry Division of the NBS Institute for Materials Research. The following research

areas are discussed: air pollution studies; characterization of

chemical structures; synthesis of research materials; a disaccharide of d-lyxofuranose; novel research materials;

isotopic methods for analysis of carbohydrates; occurrence,

preparation, and properties of naturally occurring

monosaccharides, including 6-deoxy sugars; and standard

reference materials.

TN428. Activation analysis: Cockcroft-Walton generator, nuclear

reactor, Linac, July 1966 through June 1967, Edited by J. R. DeVoe, NBS Tech. Note 428 (Nov. 1967).

Key words: Activation analysis; biological; botanical

samples; carbon in sodium; Cockroft-Walton generator;

digital computers; flux monitors; high precision 14 MeV

neutron activation; homogeneity testing; instrumentation;

NBS Linac; NBS reactor; photoneutron reactions; self absorption corrections; standard reference materials; vanadium in irons and steels.

This is the first separate (not combined with that of

Radiochemical Analysis) summary of progress for the

51
Activation Analysis Section of the Analytical Chemistry

Division of the National Bureau of Standards.

Pertinent information on the irradiation facilities of the nuclear

reactor, Linac and Cockcroft-Walton generator are described.

The initial installation of pneumatic transfer tubes is completed.

Of great significance is the completion of a clean room that is used for pre-irradiation chemical separation for high sensitivity

activation analysis.

A dual-sample biaxial rotating 14 MeV neutron-irradiation

assembly has been tested. This assembly is part of a system that

is controlled by a relay type of programmer to automate those

irradiation steps that adversely affect precision of the analysis.

This system was used to improve greatly the precision of

analysis for oxygen and fluorine. As a result of improved precision with the 14 MeV neutron

irradiation, a study of systematic errors is now possible. Efforts

to establish a reproducible correction factor for neutron and

gamm-ray absorption between different matrices within the sample have shown considerable promise.

Standard Reference Material (SRM) steel chip Nos. 3b, 3c,

and 30f have been analyzed for vanadium. Preliminary analyses

of high purity platinum (a potential SRM) showed silver, copper,

gold, palladium, and iridium at the ppm level. Future biological

SRM's, (tree leaves, and beef liver) were tested for homogeneity

and found satisfactory.

A variety of service analyses were performed. In particular,

very pure aluminum was found to contain fractions of a ppm of

chromium and scandium.

Additional efforts are being made to monitor reactor neutron

fluxes. Additional nuclear instrumentation is being assembled to improve the versatility of the analysis technique.

Performance of the bremsstrahlung target, used with the linear electron accelerator, has been evaluated. Photon intensity distribution and stability was found to be within usable range. Analyses using the (y.n) or (y.p) reactions have been developed

for magnesium in steels, and carbon in sodium metal.

TN430. Designs for surveillance of the volt maintained by a small group of saturated standard cells, W. G. Eicke and J. M.

Cameron, NBS Tech. Note 430 (Oct. 9, 1 967).

Key words: Control charts; experiment design; saturated standard cells; standard cells calibration; statistics; voltage

standard.

This technical note describes a procedure for maintaining

surveillance over a small group of saturated standard cells. The

measurement process is briefly discussed and the principle of

left-right balance as a means of eliminating certain systematic

errors is developed. Specific designs and their analysis for intercomparing 3, 4, 5 and 6 cells in a single temperature

controlled environment are given. Procedures for setting up

control charts on the appropriate parameters are given, and a technique is described for detecting certain types of systematic

errors.

TN43I. Second breakdown in semiconductor devices - A

bibliography, H. A. Schafft, NBS Tech. Note 431 (Oct. 1967).

Key words: Bibliography; device reliability; diodes; failure mechanisms; failure modes; second breakdown;

semiconductor devices; thermal breakdown; transistors. Almost 200 references with appropriate key words are listed which provide, it is believed, a comprehensive coverage of the

literature of second breakdown in transistors and other

semiconductor devices from 1958 through much of 1967. A

representative list of earlier papers dealing with what appears to be second breakdown in point-contact and p-n junction diodes is

also included. The indexes consist of an author index and an

index to subject matter with reference tabulations and with key

word assignments.

TN434. "Life cycling" test on several strain gage pressure

transducers, P. S. Lederer, NBS Tech. Note 434 (Oct. 1967).

Key words: Life cycling; life testing; pressure cycling; pressure transducer; strain gage.

This publication reports the effects of many thousands of

pressure cycles on the performance characteristics of several types of strain gage pressure transducers. The results obtained

indicate permanent changes in zero pressure output and

sensitivity. Most of these changes tend to occur during the first few thousands of cycles. The equipment and procedures used to obtain the data are described.

TN435. The hyperbolic character of certain experimental results which tend toward limiting values, A. F. Kirstein, NBS Tech.

Note 435 (Nov. 1967).

Key words: Experimental; graphical solution; hyperbolic

character; limiting values. The hyperbolic character of certain experimental data

obtained from structural and mechanical testing provides an

extremely simple graphical method for use in approximating the

limiting values associated with the data. The method, developed

by Southwell to explain the behavior of eccentrically loaded thin

elastic struts, is shown to have much wider application. A

limited number of illustrations are given to describe the method

and to show how it might be used as a research tool.

TN437. Disclosures on: Autosort, an automatic collating and

sorting machine; optical heterodyne refractometer; liquid

metering pump; stable wideband relaxation oscillator using

three inverting amplifiers; and seat belt webbing abrasion

resistance testing machine. Editors, D. Robbins and A. J. Englert, NBS Tech. Note 437 (Nov. 1967).

Key words: Abrasion resistance testing; automatic

document distribution; flexible tubing pump; inverting

amplifiers; laser beam phase shift; laser heterodyning; liquid

metering pump; optical refractive index; programmed

document distribution; relaxation oscillator; rotatable document bin array; seat belt webbing abrasion.

This Note presents descriptions and drawings of five devices

that embody interesting and unusual solutions to problems

frequently encountered in their respective fields. The devices

are: autosort, an automatic collating and sorting machine, optical

heterodyne refractometer, liquid metering pump, stable wideband relaxation oscillator using three inverting amplifiers,

and seat belt webbing abrasion resistance testing machine.

Other disclosures on various subjects may be found in NBS

Technical Notes 237, 253, 263, 282, 287, and 295.

TN438. Compendium of cib initio calculations of molecular

energies and properties, M. Krauss, NBS Tech. Note 438

(Dec. 1967).

Key words: Ab initio electronic calculafion; dipole moment;

dissociation energy; electron affinity; energy; field gradient;

magnetic constants; molecular electronic structure; orbital energy; polarizability; quadrupole moment; spectroscopic

constants. The number of ab initio molecular electronic calculations has

increased dramatically in the last few years. Both the

practitioners and other interested students of the results of the

calculations have found it increasingly difficult to determine the present status of these calculations. This compendium

references the work from 1960 to the present and abstracts from

52
the mass of data the best values for several observable properties

including the total energy, dissociation energy, electron affinity,

spectroscopic constants, electric moments, field gradients,

polarizabilities. and magnetic constants. In order to provide and

insight into molecular electronic structure tables of orbital energies are also included.

These tables are meant to direct attention to the successes and

failures of the calculations by compiling a large percentage of the

best results in a reasonably compact form. Its usefulness will be

limited in time by rapid advance in the field.

53
4. TITLES AND ABSTRACTS OF PAPERS PUBLISHED BY OTHERS, 1966-67

Reprints from the journals listed in this Section may often be obtained directly from the authors. See Section 5.2 on page 109 for additional information.

9150. A comparison between a switched and a correlation radiometer for cryogenic noise source measurements, D. F. Wait and C. L. Trembach, (ISA 20th Annual Conference and

Exhibit, Los Angeles, Calif., Oct. 4-7, 1965). ISA Preprint

14.4-3-65 (Oct. 1965).

Key words: Cryogenic noise source measurements;

microwave: noise source measurements; radiometer.

A microwave sum-and-difference-correlation (S-D-C)

radiometer is compared theoretically and experimentally with a microwave switching (Dicke) radiometer. Particular emphasis is given to the precision with which each radiometer can compare

cryogenic noise sources.

9151. A miniature helium turbo-expander for cryogenic

refrigeration systems, M. T. Norton. (Proc. XI Intern. Congress Refrigeration, Munich, Germany, Aug. 1963),

^oo)f.. Progress in Refrigeration Science and Technology I, 131-135(PergamonPressInc.,NewYork,N. Y., 1965).

Key words: Design; expansion turbine; gas bearings; helium

refrigeration; performance; 9800 RPS; 200 Watts (30 °K).

The Cryogenic Engineering Laboratory is investigating the use of small turbo-expanders, supported by gas bearings, which

produce small amounts of refrigeration at 4.2 °K and 30 °K. The

turbine and externally pressurized gas bearings used with the 4.2 °K system have previously been reported.

This paper describes a helium turbine expander designed for use in a closed cycle system. The turbine was designed to extract about 200 Watts at 30 °K from the helium flow. The

turbine is 7.9 mm in diameter, rotates at 9800 revolutions per second, and was designed for an inlet pressure of 4 atmospheres

and 4:1 pressure ratio. Tests covering pressure ratios from 4:1 to 6.4:1 indicate a peak efficiency at 65 percent. The turbine

design philosophy and performance data of this turbine are

given.

9152. A precision pulse-operated electronic phase shifter and

frequency translator, J. A. Barnes and A. Wainwright, Proc. /£££S3,No. 12, 2143-2144 (Dec. 1965).

Key words: Frequency translator; phase shifter; universal

time. A reference signal is processed through a voltage variable

delay line and a narrow band filter. After a voltage pulse of

proper amplitude and shape is applied to the voltage variable delay line, the output signal from the narrow band filter has

exactly one cycle of phase less (or more depending upon pulse

shape) than the reference signal. By suitable processing, it is possible to generate precise submultiples of the one cycle (360 °) of phase and thus realize precise and stable phase shifts.

This system has great utility in the generation of small but

precise frequency offsets such as are used in the generation of

the coordinated universal time scales. To this end a rather compact unit has been constructed to offset the frequency of a 100 KHz signal from 0 to -500 parts in 10'° in steps of 50 parts in

10"'.

9153. A survey of the thermodynamic data on heavier elements

and their compounds: high-temperature enthalpy and

vaporization equilibria, T. B. Douglas, Proc. 3d Meeting

Interagency Chemical Rocket Propulsion Group, Working

Group on Thermochemistry, El Segundo, Calif, Mar. 17-18,

1965, I, No. 82U, 5-16 (Chemical Propulsion Information

Agency, Silver Spring, Md.,July 1965).

Key words: Enthalpy; heavier elements; literature survey;

refractory compounds; thermodynamic; vaporization.

A comprehensive, though not all-inclusive, survey of the published literature was undertaken for the purpose of

determining where high-temperature enthalpy and vaporizationequilibrium data appear to be lacking or inadequate for Ti, Zr, W,

Pb, Hg, I, Hf, Th, U, and their light-element compounds

considered to be of possible importance in chemical propulsion

and refractory applications. The results of this survey are summarized, and several examples are presented of the effects of

uncertainties in the standard thermodynamic properties on

calculated equilibria at high temperatures. It is pointed out that the first ionization potential of a molecule containing one alkali atom can be expected to exceed that of the free alkali atom by

approximately the dissociation energy of the neutral molecule;

and this relation is verified, within experimental uncertainty, for several examples.

9154. Activation-analysis program and facilities at the National

Bureau of Standards, J. R. DeVoe and G. W. Smith, Proc. 1965 Intern. Conf. Modern Trends in Activation Analysis,

Texas A&M University, College Station, Texas, pp. 225-229

(Apr. 1965).

Key words: Clean room; computers; counting rooms;

feedback analysis; optimization of variables 10 MW nuclear

reactor; pneumatic tubes; radiochemical laboratories; 14 MeV neutron generator; 100 MeV-40 KW LIN AC.

The National Bureau of Standards" Radiochemical Analysis

Section is now developing a capability in activation analysis to complement other analytical techniques using radioisotopes in analysis.

Activation analysis can be likened to spectrometric methods in which the re-emitted radiation from excited states (e.g. radioisotopes) which are often long (e.g. milliseconds to years) are measured and related to the kind and amount of element

which interacted with the primary radiation. The analyst learns

to discriminate from unwanted excitation processes by varying

the type and energy of incident radiation, the length of time of the

excitation, and the type of detector that measures the re-emitted or secondary radiation. To be most effective for our applications of activation analysis a computer is best used in a regenerative feed-back loop which

consists of selecting, in sequence; the proper nuclear reaction,

fime of irradiation, complexity of radiochemical separation,

appropriate detector, stripping of time dependent radiation

spectra, and judgment of the analyst. It should be emphasized

that a selective combination of the above variables does not

place too large a burden on any one of the variables. Plans for the development of facilities to carry out these concepts are discussed.

9155. Additional observations on the electronic spectrum of copper (II) acetate monohydrate, C. W. Reimann, G. F. Kokoszka, and G. Gordon, J. Inorg. Chem. 4, No. 7, 1082-

1084 (July 1965).

Key words: Bi-nuclear complex; copper (II) acetate monohydrate; polarized electronic absorption spectrum;

tentative assignment based on selection rules.

54
The polarization properties of a previously undiscovered band

in single crystals of copper (II) acetate monohydrate are

reported. The absorption spectrum of copper (II) acetate monohydrate in the region 8000 cm ' to 30.000 cm ' is considered in terms of the requirements of the Cav, and C2

symmetry groups.

9156. Anniversaries in 1965 of interest to statisticians, C.

Eisenhart,/lw.5far. 19,No. 5,21-29(Dec. 1965).

Key words: Anniversaries; history; probability; statistics; Pierre de Fermat; Gregor Mendel; Isaac Todhunter.

Patterned on the annual articles in the American Journal of

Physics on "Anniversaries ... of Interest to Physicists", this invited paper aims to initiate a similar series of articles in the American Statistician on "Anniversaries ... of Interest to

Statisticians". The year 1 965 marks the tercentennial of the death of Pierre

de Fermat, co-founder, with Blaise Pascal, of the mathematical

theory of probability; the centennial of the publication of Isaac Todhunter's History of the Mathematical Theory of Probability

. . .; and the centennial of Gregor Mendel's oral presentation of

the statistical laws of inheritance that today bear his name to the Brunn society for the Study of Natural Science. The lives and

principal accomplishments of Fermat, Todhunter, and Mendel

are reviewed from the viewpoint of their contributions to, and

influence on, statistical theory and practice.

9157. Applications of sulfur coating to integrating spheres, S. T. Dunn,Appl. Opt. 4, 877 (July 1965).

Key words: Coatings; infrared integrating sphere coatings;

integrating spheres; sphere; sulfur coatings.

This letter describes several methods of preparing infrared

integrating sphere coatings.

9158. Atmospheric research and electromagnetic telecommunication, H. G. Booker and C. G. Little, Part IJEEE Spectrum!,

No. 8, 44-52 (Aug. 1965); Part II, IEEE Spectrum 2, No. 9, 98-103 (Sept. 1965).

Key words: Atmospheric research; electromagnetic;

telecommunication; United States.

Part I-The broad subject of electromagnetic telecommunication in the United States is examined, with the stress on the importance of atmospheric research to this growing field.

Part I I-The concluding portion of this two-part article presents an analysis of telecommunication-oriented atmospheric

research in the United States for the fiscal year 1964.

9159. Unassigned.

9160. Bond with reinforcing steel, D. Watstein,/4/72. Soc. Testing Mater. Spec. Tech. Publ. 169A, Significance of Tests of

Concrete Making Materials, pp. 239-245 (July 1965).

Key words: Bond in pullouts and beams; bond strength;

deformed reinforcement; review of bond literature. A review is presented of the significance of various tests of

bond between reinforcing steel and concrete. The effect of the more important parameters such as bar diameter, strength of

concrete, and spacing of bars as determined in some recent researches is appraised, and the appropriate provisions of the standards for reinforced concrete construction are discussed. A

brief discussion of the significance of bond and bond tests for prestressed concrete is also included.

9161. Unassigned.

9162. Color, D. B. Judd, Encyclopedia of Physics, pp. 113-116

(Reinhold Publ. Corp., New York, N. Y., 1965).

Key words: Chromatic adaptation; color; colorblindness;

colorimetry; theories of color.

This three-page article gives the conditions for a color match

by observers having normal vision and those having one or another of the six most common forms of abnormal vision. It gives the mathematical basis for color measurement, both visual and photoelectric, for automatic production of pictures in color,

and for prediction of the influence of chromatic adaptation on

color perception, and it indicates the chief property of four of the most respected theories of color.

9163. Comments on the mechanism of the 337-micron CN laser, H. P. Broida, K. M. Evenson, and T. T. Kiluchi, J. Appl. Phys.

36, No. 10,3355 (Oct. 1965).

Key words: Laser; radiation; rotational level; vibrational

state; 337-micron CN laser. Very intense laser radiation at 337 /a has been observed by

Gebbie et al., when a pulsed electrical discharge is passed

through various organic compounds such as HCN, CH3CN and

C2H5CN. Chantry et al., suggest a laser transition in the

vibrational state v=2 of the ground electronic state A'^S of CN

from the rotational level A^=8 to K=7.

If the proposed explanation is correct, then a number of other

transitions should occur, some with considerably higher

probability than the observed emission.

9164. Congruence subgroups of positive genus of the modular

group, M. Newman and M. Knopp, Illinois J. Math. 9, No. 4,

577-583 (Nov. 1965).

Key words: Congruence groups; genus; modular group.

Let r(«) be the principal congruence subgroup of T of level n,

r„ the subgroup of ^ generated by and S={^q and '"o(«)

the subgroup of ^ consisting of all elements

^ ^ ^) °f ^"'^'^ ^^^^

c = 0 (mod n). Then it is proved that if C is a subgroup of ^ containing r„, then either C=r or G C ^a(d), d\n, d>\. This is used

to prove that a free congruence subgroup of ^ of level n (i.e., a

free subgroup of ' containing ^(n)) is of positive genus, provided

that {n, 2.3.5.7.13)=1.

9165. Unassigned.

9166. Decays of positive-parity baryon resonances in a broken

U(12), H. Harari, D. Horn, M. Kugler, H. J. Lipkin, and S. Meshkov, Phys. Rev. 140, No. 4B, B1003 (Nov. 1965).

Key words: Baryon; branching ratio; decay; decay width; meson; resonances; spurious; symmetry breaking; U(12)

theory.

The positive parity baryonic resonances are classified and

their decay widths calculated in a broken U( 1 2).

9167. Density and specific gravity, J. K. Taylor, Encyclopedia of

Industrial Analysis 1, 546-560 (Interscience Publ. Inc., New

York, N.Y., 1965).

Key words: Gravity; specific density.

Density is an important and significant property of matter. For pure materials, density values may serve as one means of

identification. For binary mixtures, such measurements

frequently provide convenient methods for analytical

determination of composition. Density values also may be

combined with other physical properties such as viscosity or

refractive index for analytical or structural determinations. In

solid-state chemistry, precise density data on pure materials may

provide information of the number of dislocations present in a given specimen.

55
An extensive literature exists both on methods for measurement of density and on tabulations of measured values

for a wide variety of materials. An exhaustive review of this literature is outside the scope of this chapter. In fact, the reader

is urged to consult original sources, especially for details of precision methods. Instead, general considerations will be

presented here, especially those that might be useful to the practicing analytical chemist.

9168. Determination of trace amounts of cadmium and silver by

substoichiometric radioisotopic dilution analysis, A. R. Landgrebe, L. T. McClendon, and J. R. DeVoe, Trans. Am.

Nucl. Soc. 8, No. 2,315-316(1965).

Key words: Cadmium; dithizone; silver; sub-stoichiometric

radioisotopic dilution analysis; trace amounts. A new method, using a substoichiometric amount of the complexing reagent dithizone in radioisotope dilution analysis, was developed for the determination of trace amounts of silver and cadmium. Silver was determined in an acidic solution at pH

4.75, using a low concentration of dithizone, 10"* g/ml.

Cadmium was determined using ammonia-ammonium chloride buffer at the ju.g/ml level. The sensitivity of the method is limited by 1) there is a limit to which the organic reagent can be

diluted and still retain the effect of substoichiometry. 2) the

specific activity of the radioisotope, 3) impurities at low

concentration, that may act with the substoichiometric reagent,

4) hydrolysis of the complexing reagent and analyzed elements,

and 5) adsorption on glassware.

Two major advantages of the direct substoichiometric

radioisotopic dilution analysis are 1) it is possible to determine a number of elements in the same sample by using agents, varying

the pH, etc., 2) after adding the radioisotope to the solution being

analyzed losses of the element being determined do not influence the results of the analysis.

9169. Determination of trace amounts of tellurium in standard

reference materials by neutron-activation analysis, D. A. Becker and G. W. Smith, Proc. 1965 Intern. Conf. Modern

Trends in Activation Analysis, Texas A&M University,

College Station, Texas, pp. 230-235 (Apr. 1965).

Key words: Chemical separation; distillation; neutronactivation; tellurium.

For the first time, neutron activation was used for elemental

analysis of NBS Standard Reference Materials at the National

Bureau of Standards. The reference materials were of two

general types, cartridge brass and white cast iron, and were

analyzed for their tellurium content. Utilizing the nuclear

reaction Te'^° {n,y)Te'^' §-V^\ the samples were irradiated and

the I'^' separated by a* destructive distillation and solvent extraction technique. Chemical yields were obtained through

the use of V-^ tracer. Tellurium concentrations of 2 to 800 ppm

were determined, and the results compared to the results on

identical samples obtained by polarography and emission

spectroscopy.

9 170. Dissociation constant of acetic acid in deuterium oxide from

5 to 50 °. Reference points for a pD scale, R. Gary, R. G. Bates,

and R. A. Robinson, J. Phys. Chem. 69, No. 8, 2750-2753

(1965).

Key words: Acetic acid; acidity in deuterium oxide;

deuterium oxide; dissociation constant; heavy water; pD

scale.

Electromotive force measurements of a cell without liquid

junction have been used to determine the dissociation constant of acetic acid in deuterium oxide from 5 to 50 °. The enthalpy,

entropy, and heat capacity changes on dissociation of acetic acid

have been calculated. Values of - log (a/;+ yci-) and the conventional pa;; values for the equimolal (0.05 m) acetic acid- sodium acetate buffer solutions have been determined. These

provide a second fixed point for standardizing the pD scale,

supplementing the equimolal mixture of KD2PO4 and Na2DP04

established in an earlier investigation.

9171. Dissociation of H2+ by electron impact, G. H. Dunn, B. Van

Zyl, and R. N. Zare, Phys. Rev. Letters 15, No. 15, 610 (Oct.

1 1, 1965).

Key words: Dissociation; H2+; electron. The cross section for dissociation of H2+ by electron impact

has been measured over the electron energy range 25 eV^ to 600

eV. Results are found to agree well with available theory when

the Franck-Condon factors are assumed to describe the vibrational state population of H2+.

9172. Effects of thermal shrinkage on built-up roofing, W. C. Cullen,J. Bldg. Res. Instr. 2, No. 4, 23 (July- Aug. 1965).

Key words: Deterioration; insulation; radiative cooling;

roofing, built-up.

The effects of thermal movement of bituminous built-up roof

membranes are related to some common failures of built-up

roofing observed in field exposures. A procedure for determining the amount of thermal movement of built-up

membranes is described. Data are given for the thermal

movement of various bitumens and reinforcing felts used in the construction of built-up roofs and for the composite membranes

over a temperature range of +30 to -30 °F. The data obtained

are related to field experiences and suggestions are presented

which will prove beneficial in reducing the incidence of built-up

failure due to thermal movement.

9173. Elastic constants of single crystal UO2 at 25 °C, J. B. Wachtman, Jr., M. L. Wheat, H. J. Anderson, and J. L. Bates,

J. Nucl. Mater. 16,39-41 (1965).

Key words: Compressibility; elastic constants; elastic compliances; single crystal; velocity of sound; uranium

dioxide.

The elastic constants of single crystal UO2 at 25 °C were

determined to be c„=3.95 ± (0.018), Cr2=1.21 ± (0.019), and

C44=0.641 ± (0.0017) in units of lO'-d/cm-. The numbers in parentheses are computed standard errors of the corresponding

constants based on about 16 measurements of each transit time

equired in four independent determinations of the set of three

elastic constants.

9174. Electrical testing in chemical technology, A. H. Scott,

Encyclopedia of Chemical Technology, 2d ed., 7, 716-726

(1965).

Key words: Electrical testing; conductance; dielectric conductance; conductivity; volume conductivity; insulation conductance; resistance; dielectric resistance; resistivity; dielectric constant; permittivity; dissipation factor; loss index; dielectric strength; arc resistance; tracking;

measurements.

Electrical testing of one sort or another is being used today to

(a) determine the electrical properties of materials for design purposes, (b) determine the purity of the materials, (c) check the uniformity of manufacture or the maunfacturing process, (d) aid

in developing an understanding of the molecular structure of

materials, (e) characterize materials, and (f) indicate the influence of environment on the properties of materials. The

purpose of this article is to briefly describe such electrical measurements and to indicate their usefulness and limitations.

56
9175. Electron spin resonance studies of the reaction of watersoluble polymers with hydroxyl radicals, F. Sicilio, M.

Dousset, R. E. Florin, and L. A. Wall, (Proc. 1 50th American

Chemical Society Meeting, Atlantic City, NJ., Sept. 12-17,

1965), Polymer Preprint 6,No. 2, 958-964 (Sept. 1965).

Key words: Free radicals; polyvinyl alcohol; polyethylene

oxide; tetrahydrofuran; hydroxyl radicals; electron spin resonance.

Free radicals were generated from polyvinyl alcohol, ethylene

glycol, polyethylene oxide, dimethyl ether, tetrahydrofuran and

dioxane, by the action of hydroxyl radicals from TiCh + H2O2

on the substrates in an aqueous flow system, and were observed

by electron spin resonance. The radical •CH2OCHI3 from

dimethyl ether had a concentration of 7.9 x 10 " M .02 sec after mixing at 2 to 7 °C, and a rate constant for disappearance of 0.4

x 10" liter/mole sec which is considerably greater than that for hydroxyl. The radical from polyvinyl alcohol is explainable

either by abstraction from the CH2 group, or by scission following abstraction from CHOH or CH2. Tetrahydrofuran

gives a very complicated spectrum attributed to the two cyclic

radicals formed by abstraction in the 1 and 2 positions. The

radical from polyethylene oxide appears to have four precisely

equivalent protons with a splitting of 9.2 gauss, plus minor

splittings, and is attributed to a positive ion radical,

~CH+ 20CH2~ or~OCH+ 2-CH20~.

9176. Fire test methods for paints, A. F. Robertson, Bldg. Res.,

pp. 48-52 (July- Aug. 1965).

Key words: Combustibility; endurance; fire; flammability

tests; paints.

A discussion is presented of the applicability of various fire test methods to the evaluation of paint coatings from the fire safety viewpoint. Sixteen flammability test methods are briefly

described and a limited amount of data are presented to show the type of correlation which exists between six of the test methods.

It is emphasized that few, if any, of the paints currently available provide any but the most minor influence in delaying fire penetration through structures as measured by the fire endurance test ASTM Procedure E-119. Manufacturers are encouraged to attempt development of paints which show better performance by this method.

9177. Floor coverings, T. H. Boone, Building Construction

Handbook, 2d Edition, Ed. F. S. Merritt, Section 13, pp. 13-1- -13-8 (McGraw-Hill Book Co., Inc., New York, N. Y., 1965).

Key words: Adhesive industrial; characteristics; conductive; flooring; installation; standards.

Since every floor is a system comprising many parts, complete

satisfaction with a flooring installation is experienced only when

all parts perform well. Dissatisfaction can arise from failure to take into consideration during the earliest stages of building

design the importance of each part, the type of environment, and

traffic conditions to be encountered in the finished building.

This section summarizes the characteristics of nontextile floor coverings with the intent to be helpful in the selection of floor covering, adhesive, and in the preparation of the subfloor. Methods for properly installing these materials are described.

Specifications, standards and floor trade associations are also

listed.

9178. Formation of crystallites of benzophenone in hydrocarbon

glass, R. Keller and D. Breen,7. Chem. Phys. 43, No. 7, 2562-

2563 (Oct. 1965).

Key words: Crystals; phosphorescence; triplet states.

Small, invisible crystallites of benzophenone are formed in dry

hydrocarbon glass at 77 °K when the concentration exceeds 10 -'

313-589 0-69—

molar. The emission from these suspended crystallites is greatly

reduced because of annihilation interactions between triplet excitons. The decay of phosphorescence of concentrated

solutions following flash excitation was shown to result from a sum of the decay of phosphorescence of dissolved molecules

plus the phosphorescent decay of benzophenone crystals.

Additions of butyl alcohol to the dry hydrocarbon glass prevents

the formation of these crystallites.

9179. Unassigned.

9180. Gas-phase radiolysis and photolysis of neopentane, S. G.

Lias and P. Ausloos, J. Chem. Phys. 43, No. 8, 2748-2759

(Oct. 1965).

Key words: Free radicals; ion-molecules reactions; neopentane; photolysis; radiolysis.

The photolysis of neo-C5Hi2-neo-C5Di2 mixtures has been

investigated at 1470 and 1236 A. From the products formed in the absence and presence of NO or I-I2S, the occurrence of the following fragmentation processes could be derived:

neo-C,5Hf2^CH4 + iso-C4H8 (I) CH.3-l-iso-C4H8 (2) CHs-hCH^ + C^He (3) These modes of decomposition also prevail when neopentane is excited by collision with electrons accelerated by an electrical

field applied during radiolysis. At 1236A, the relative probabilities of occurrence of processes 1, 2, and 3 are approximately 1.0, 4. 5, and 1.1. From the isotopic analysis of the products formed in the direct and inert gas sensitized radiolysis of neo-CoHi2-neo-C5Bi2

mixtures in the presence of NO, O2 or I2 as free radical scavengers, it could be derived that the fragment ions C2H+;i,

C2H+5, C3H+5, and C,,H+7 are formed.

9181. Geomagnetic and solar data, J. V. Lincoln, 7. Geophys.

Res. 70, No. 13, 3227-3228 (July 1965); 70, No. 15, 3761-

3763 (Aug. 1965);70,No. 1 7, 4383-4384 (Sept. 1965);and70,

No. 19,4963-4964 (Oct. 1965).

Key words: Data, geomagnetic and solar; geomagnetic solar

data; solar data, geomagnetic.

9 1 82. Growth of large sodium chloride crystals from solution for color-center studies, P. M. Gruzensky.V. Chem. Phys. 43, No.

1 l,3807-3810(Dec. 1, 1965).

Key words: Alkali halides; aqueous; chloride; color centers; conductivity; crystal growth; sodium.

Sodium chloride single crystals with edge dimensions as large as 2.5 cm were grown from aqueous solutions. Solutions were

purified by chemical precipitation of trace contaminants and

filtration through membrane filters. Crystal defects were

apparent in the initial stages of growth, but the outer portions of

crystals were free of dislocations. F-band coloration by x-rays at room temperature was not linear and the "first stage" was either absent or nearly so. Transition from extrinsic to intrinsic dc

conductivity occurred at 350 °C with the extrinsic conductivity

two orders of magnitude lower than for "pure" melt-grown

crystals.

9183. High-resolution infrared spectra of cyanogen and cyanogen

'•^Na, A. G. Maki,y. Chem. Phys. 43, No. 9, 3193-3199 (Nov.

1965).

Key words: Bond distances; cyanogen; infrared; molecular

structure; spectra.

The infrared absorption of '-C2'''N2 and '-C2'''N2 has been

studied with a resolution of 0.08 to 0.04 cm '. The vibration- rotation band constants were determined for eight vibrational
transitions of '-'Ci'^N-; and three vibrational transitions of

'-C2'''N2. Many unresolved iiot band Q-branclies were also measured. The values for many vibrational and rotational constants are given. The bond distances determined from the

rotational analysis and their three-standard-deviation error

limits, are /« (C-C)= 1 .38;,±0.030A and r„ (C = N)= 1 . 1 54±0.01

A. The N-N distance and corresponding error limits are 3.697±0.010A.

9184. Human engineering in the design of a console for the comparison of volt boxes, P. H. Lowrie, Jr., ISA J., pp. 67-71

(July 1965).

Key words: Calibration console; console; high

measurement accuracies; human engineering; volt boxes.

Too often the human element is not given adequate

consideration in the design of precise measuring equipment. The

dependence upon the operator for the attainment of high

measurement accuracies cannot be denied. This paper describes

a calibration console in which the human engineering factors were given the same consideration as the technical requirements.

In this system the operator is considered to be a decision maker,

and those functions not requiring judgment are handled

automatically by the console. Most of the calculations are performed automatically by internal circuits, and the results are displayed digitally upon command. The console is an illustration

in point that the principles of human engineering are as applicable to the precise measurements found in the standards

aboratory as they are to the production line. The paper

discusses the features of the console and points out some of the

pitfalls that may be encountered in a design of this type.

9185. Unassigned.

9 1 86. Infrasonic waves from aurorae, K. Maeda and J. M. Young,

Nature 207, No. 4994,279-281 (July 1965).

Key words: Atmospheric resonances; auroral infrasound;

infrasonic waves; thermal structure. The effects of atmospheric thermal structure on the free-field propagation of auroral infrasound are discussed. Experimental

data illustrating dispersion and near-sinusoidal oscillations near

the Brunt frequency are shown. The effects of the large positive

lapse rate layers, especially the one in the thermosphere, on

atmospheric resonances are given particular attention.

9187. Unassigned.

9188. International intercomparison of standards for microwave

power measurement, G. F. Engen. IEEE Trans. Microwave

Theory Tech. MTT-13, No. 5.713-715 (Sept. 1965).

Key words: International intercomparison; microwave;

microwave power measurement.

In compliance with a recommendation of the International

Scientific Radio Union (URSI) intercomparisons of microwave

power standards have been made between Japan, the United

Kingdom, and the United States.

Initially, there was a rather large difference in the Japan/United States comparisons: but. after several improvements in the design of the bolometer mounts employed

as a transfer standard, consistently good agreement of the order

of a few tenths of a percent has been realized.

In intercomparisons between the United Kingdom and either Japan or the United States, there was a small but rather consistent difference in the initial results. Again, the agreement

has improved with more recent comparisons.

The microcalorimetric and impedance methods were employed by Japan and by the United States to evaluate the

bolometer mount efficiency, whereas in the United Kingdom a combination of calorimetric, force-operated, and bolometric

methods were used. The close agreement achieved is thus

particularly significant because of the wide differences in the basic principles of the techniques employed.

As a result of this program, the accuracy limits of the different methods may now be stated with greater confidence. In

addition, the interchange of ideas has yielded improved

instrumentation.

9189. International URSIGRAM and world days service "report on activities 1964", A. H. Shapley, URSI Info. Bull. 150, 43-55

(May 1965).

Key words: Radio science; world days service.

9 1 90. Interspecimen comparison of the refractive index of fused

silica, I. H. Malitson.y. Opt. Soc. Am. 55, No. 10, 1205 (Oct.

1965).

Key words: Dispersion; fused silica; infrared materials;

optical materials; refractive index.

The index of refraction of optical quality fused silica (Si02) was determined for 60 wavelengths from 0.2 1 to 3.7 1 microns at 20 °C. The dispersion equation

^_ 0.6961663\^ 0.4079426V-' 0.8974794\^

' (0.0684043 )2'^\2_ (0.1 162414)2 X2_(9 gggiei)^

where A. is expressed in microns was found to yield an

absolute residual of 10.5x10 '^. The variation in index between

12 specimens was determined. Dispersive properties of the

material and thermal coefficient of index are graphically

presented. A comparison with previous NBS index data is discussed.

9191. Intrinsic and lattice-induced distortion of the tetrachlorocuprate ion, M. Sharnoff and C. W. Reimann, J. Chem. F/jvi. 43, No. 9, 2993-2996 (Nov. 1965).

Key words: Copper doped tetrachlorozincate; e.p.r. analysis; Jahn-Teller effect; polarized ultraviolet spectrum;

tetrachlorocuprate ion.

In an effort to determine how much of the distortion of the tetrahedral complex, CuCU', may be ascribed to the Jahn-Teller

effect, we have studied the changes in the optical and EPR

spectra which occur when this ion is embedded in several

different lattices. Although the corresponding lattice constants of the isostructural crystals, CS2CUCI4 and Cs2ZnCl4, differ by

only about 3%, gross differences exist between the g-tensors of

CuCl4= suspended in these lattices. These findings are corroborated by a comparison of the optical spectra of the two

complexes. The effects are discussed in terms of an LCAO-MO

analysis of the primarily 3d(Cu) wave functions of the complex,

and it is shown that the change in ionic distortion is connected

almost exclusively with a small but significant change in the amount of 4p(Cu) character in the t2 primarily 3d(Cu) orbitals. The analysis points towards the conclusion that the low

symmetry (point group Cs) of the ion is an intrinsic property and

that the dominant mechanism of the distortion of the ionic symmetry from T^ is the J ahn-Teller effect.

9192. Investigation of polymer pyrolysis with thermogravimetry,

J. H. Flynn and L. A. Wall, (Proc. 1 50th American Chemical

Society Meeting, Atlantic City, NJ., Sept. 12-17, 1965),

Polymer Preprint 6, No. 2, 945-955 (Sept. 1 965).

Key words: Calculation of kinetic parameters;

determination of activation energies; preexponential factor;

stability of polymers; thermogravimetric analysis; variation of the activation energy.

58
A detailed theoretical analysis of thermogravimetry as applied

to polymer decomposition investigations, particularly in regard

to elucidating kinetic and mechanistic details, has been made and

pertinent mathematical relations presented. Cases considered

are realistic ones based on isothermal pyrolytic studies and

include: 1) where the rate is dependent upon the conversion

raised to a simple power, 2) where the rate proceeds through a maximum with conversion and 3) composite situations. The changes in the shape of the thermogravimetric curves

resulting from the variation of the activation energy, preexponential factor, and heating rate for the various cases are compared and discussed. The effect of a linear temperature

dependence in the preexponential factor on the character of the curves is also examined.

From these general considerations, it appears that, although

thermogravimetric analysis may be sufficient for the approximate determination of activation energies and overall

relative stability of polymers, in most cases, complementary

isothermal studies are necessary for the unambiguous

interpretation of the kinetics and the calculation of kinetic parameters.

9193. Ionospheric effects of particles, G. C. Reid, Proc. COSPAR

Polar Cap Panel Symp., Alpach, Austria, 1964. pp. 221-231

(Academic Press Inc., New York, N. Y., 1965).

Key words: Auroral absorption; auroral radar; ionospheric

disturbances; polar cap absorption; solar protons;

sporadic-E.

This paper is a summary of a review paper presented at the COSPAR Polar-Cap Panel Symposium. Current knowledge

concerning energetic-particle effects in the ionosphere is briefly

discussed, and outstanding problems are emphasized.

9194. Ion-pair process in CH3CI photoionization, V. H. Dibeler

and J. A. Walker,y. Chem. Phys., 43, No. 5, 1842-1843 (Sept.

1965).

Key words: Ionization energy; ion pair process;

photoionization.

A brief report on the first direct observation of both positive

and negative members of an ion pair process by photoionization.

9195. Line broadening, W. L. Wiese, Book, Plasma Diagnostic

Techniques, Ed. R. H. Huddleston and S. L. Leonard, 21,

265-317, (Academic Press, Inc., New York, N. Y., 1965).

Key words: Dense plasma; line broadening; plasma

diagnostic techniques; Stark effect.

Line broadening due to interatomic Stark effect, the most

important type of line broadening in dense plasmas, has been

recently the subject of extensive calculations by Griem, Kolb,

Baranger, Shen and others. Subsequent experiments have borne

out good agreement with the theoretical results and confirmed

the theoretically estimated error limits. Consequently, the measurement of Stark half-widths has emerged as one of the most reliable and convenient methods for the determination of

electron densities. Whenever possible, the strong, broad Balmer

line H should be employed, if necessary by admixing a trace of

hydrogen to the plasma. The experimental comparison studies indicate that precise half-width measurements of this line may

give electron densities to within 7%. For other hydrogen lines and for isolated lines of heavier elements—if for the latter the

results from several lines are averaged-uncertainties not greater

than 10 to 15% may be expected. Measurements of Stark shifts of isolated lines should only be used if the shifts are not much

smaller than the (halO half-widths. Again, as in the case of the widths, the average value over several lines should be used in order to achieve an accuracy comparable to that mentioned for

the widths. Since not many cases of large shifts are known, shift measurements, though appealing in their simplicity, may be only

occasionally applied.

An important advantage of the Stark width and shift measurements over other spectroscopic methods is that only

relative intensities are required. Moreover, the electron

densities from Stark broadening will be reliable even in cases where the existence of LTE is doubtful, while other methods

which depend on equilibrium equations are not. The useful range of electron densities extends from 10''* cm -'' upward, but

for the higher hydrogen lines it may be extended about one order

of magnitude toward lower densities. The present situation with regard to Stark broadening is, however, still not satisfactory in some respects: More

experimental checks of H are desirable to further improve the accuracy of this most important line. Secondly, the Stark

parameter calculations should be extended to more elements.

Furthermore, to reduce the amount of diagnostic work, it would

be desirable to improve the accuracy for a few strong and

characteristic lines per element. This is best done

experimentally, and the results of the few available studies should be used from this point of view.

9196. Magnetic core permeability measurement techniques, R. D. Harrington and A. L. Rasmussen, Proc. Magnetic Core Conf.

7, 11-24(1965).

Key words: Frequency range; magnetic core; permeability

techniques.

Techniques for measuring the initial complex permeability of

magnetic cores in the frequency range from 1 kHz to 50 MHz

are briefly discussed. Emphasis is directed toward studies recently carried out at the National Bureau of Standards.

At frequencies below 100 kHz, either a demountable coil or a

specially designed Maxwell bridge is used for obtaining core

data. The frequency range from 100 kHz to about 50 MHz is most conveniently covered through the use of the radio

frequency permeameter. A brief survey of the development of

the permeameter with a description of some recent measurements indicating that this method may be used to frequencies even greater than 50 MHz is given.

It has been found that toroidal coils are preferable to the permeameter for obtaining accurate measurements of the temperature coefficient of permeability. A brief description is given of a method for evaluating the inductance and resistance

changes of such coils using a bridge as a null indicating device.

The technique is capable of measuring temperature coefficients of permeability of the order of 1 0 "^ per degree centigrade.

9197. Magnetoacoustic absorption and the Fermi surface in potassium, H. J. Foster, P. H. Meijer, and E. V. Mielczarek,

Phys. Rev. 139, No. 6A, A1849-A1857, (Sept. 1965).

Key words: Fermi surface; magnetoacoustic absorption;

potassium; single crystals; zone refining.

Magnetoacoustic measurements in zone refined and oriented

single crystals of potassium have yielded detailed information on

the relative attenuation, the Fermi surface, and the phase factors

in this metal for magnetic field directions lying along the (100),

(110), and < 1 12) axes, and within a few degrees on either side of

these, perpendicular to a fixed direction of propagation of the

longitudinal ultrasonic wave, i.e., q{ 1 10). The data show that the Fermi surface in potassium is only slightly distorted relative to

its free electron value, bulging by about 0.3% in the (110)

direction and pushed in by about 0.4% and 0.5%, respectively, in the (100) and (±111) directions within the Brillouin zone (BZ).

The distortion in k/ for potassium is therefore found to be less than 1% on the average: k/ = (7.44±0.06*)xl0' cm '. The

59
average value of the phase factor for potassium is found to lie rather close to the free electron value of 0.375. (* Estimated

limit to experimental error.)

9198. Measurement of DC dielectric conductance (reciprocal

resistance) at elevated temperatures, A. H. Scott, Proc. 6th

Electrical Insulation Conf., Sept. 13-16, 1965, pp. 252-254

(1965).

Key words: Conductance; conductivity; dielectric; measurements; resistance; resistivity.

The new term adopted by Committee D-9 ASTM (DC

Dielectric Conductance) for the conductance observed in

electrical insulating materials differentiates this type of

conductance from that in metals or other conducting materials. Measurements at elevated temperatures require special

precautions and special emphasis on some of the usual precautions of measurement. Special cells or holders are required for these measurements.

9199. Measurement of the 633-nm wavelength of helium-neon

lasers, K. D. Mielenz, R. B. Stephens, K. E. Gillilland, K. F. Nefflen, and R. B. Zipin, Appl. Phys. Letters. 7, No. 10, 277-

279 (Nov. 1965).

Key words: Isotopic laser wavelengths; non-isotopic laser wavelengths.

The wavelength of the "isz-lp^ transition of neon was measured

by comparison of helium-neon lasers with the Krypton standard

of length.

9200. Measurements of ion-optical properties of a high resolution spectrometer for electron scattering, S. Penner and J. W.

Lightbody, Proc. Intern. Symp. Magnetic Technologies,

Stanford Linear Accelerator Center, Stanford Univ., Calif,

Sept. 8-10, 1965, pp. 154-163 (Oct. 1965).

Key words: Electron scattering; magnetic spectrometer;

magneto-optics.

A double focusing magnetic spectrometer for electron

scattering work is described. The spectrometer has been ray

traced using positive ions from a 400 keV Van de Graaff

accelerator. A large number of rays are traced and fitted to a second order transfer matrix by a least squares technique.

Selected third order effects are also included. A comparison of

measured matrix elements with theoretical predictions is presented. Agreement with theory is good. The intrinsic resolution of the instrument (for a point source) is approximately

1 part in 10" FWHM using the maximum solid angle allowed by

the vacuum chamber.

9201. Measurements of the viscosity of parahydrogen, D. E.

Diller, {Proc. IX Intern. Conf. Low Temperature Physics,

Columbus, Ohio, Aug. 31-Sept. 4, 1964). Book, Low

Temperature Physics, LT9, Part B, 1227-1229 (Plenum Press

Inc., New York, N.Y., 1965).

Key words: Liquid normal hydrogen; parahydrogen; shear

viscosity; temperature dependence; viscosity of

parahydrogen.

The coefficient of shear viscosity tj of parahydrogen has been

measured by the torsional crystal method at temperatures from

14° to 100 °K and at pressures up to 345 atm. Twenty

compressed fluid isotherms encompass the density range 0.003-

0.087 g/cm^ and include the critical region. The precision and

accuracy of the measurements is about 0.5%. The temperature

dependence of rj changes sign at a density approximately twice

the critical density. The viscosity at the critical point is estimated to be 35.5±5xlO-'^ g/cm-sec. The viscosity of

saturated liquid normal hydrogen is up to 5% greater than that of

parahydrogen at the same temperature. Data of this report have

been represented within experimental error by an empirical

equation of the form r)=ri„(T) + A(p) expB(p)/7', where r)o(T) is the viscosity in the low-density limit and A{p) and B{p) are density-dependent coefficients.

9202. Measuring the coordinates of a number of points in a

complex, laboratory-scale model, F. D. Ordway, Rev. Sci.

Instr. 36, No. 8, 1 156-1 159 (Aug. 1965).

Key words: Calibration points; complex laboratory-scale

model; computer; coordinate systems; digital computer;

number of points.

Points on the model, together with an array of marked

calibration points, are measured with theodolites from two

different locations. Distances between a number of pairs of

calibration points are measured precisely, and estimates of the distances from the calibration points to the measuring locations

are adjusted for the best fit to these precisely measured

distances. After adjustment, the distances from calibration points to measuring locations are used to obtain the best estimate

of the rotation matrix and translation vector relating the coordinate systems of the two theodolites. The resulting

rotation-translation matrix is used with the two sets of angle

measurements on each point of the model to obtain the Cartesian

coordinates of the point. The Gram-Schmidt orthonormalization

procedure is carried out at each step, with a digital computer.

9203. Metrology essential to the space age, A. G. McNish,

George Washington Univ. Mag. 1, No. 4, 10-14 (1965).

Key words: Modern technology; science comprehension;

space age; what is metrology.

Understanding the physical world and the progress of

civilization depends upon measurement.

9204. Microwave spectrum of perchlorylfluoride, D. R. Lide, J. Chem. Phys. 44, No. 10,3767-3768 (Nov. 1965).

Keywords: Dipole moment; microwave; perchlorylfluoride;

quadrupole coupling constant structure. The microwave spectrum of perchlorylfluoride has been

measured and analyzed. Digital averaging techniques were used

to improve the signal-to-noise ratio of the very weak lines. The

molecular constants determined for Cl^^OaF are Bo=5258.682,

Dj=O.Q0\4, DyK=0.0018, and e^!2=-19.2 Mc/s. The OCIO

angle is found to be in the range 1 1 4

°- 1 1 6°.

9205. Morphological classification in the National Bureau of Standards mechanical translation system, L. F. Meyers, J. Assoc. Compt. Mach. 12, No. 4, 437-472 (Oct. 1965).

Key words: Linguistic work; mechanical translation system;

morphological classification; translation system.

In linguistic work, morphology is the study of the rules by

which words undergo changes in form. Morphological

classification is the systematic organization of these rules. A

detailed account of the morphological classification for Russian

is given as used in the National Bureau of Standards project on

the mechanical translation of Russian into English. The account

includes the heuristic reasoning from which the classification system evolved, as well as complete classification tables, a

description of the method of their construction, and some

examples of their use.

9206. Mossbauer line broadening in SnO^, R. H. Herber and J. Spijkerman, J. Chem. Phys., 42, No. 12, 4312-4314 (June 15,

1965).

Key words: High pressure; line broadening; Mossbauer

spectroscopy; quadrupole splitting; stannic oxide.

60
Since stannic oxide, SnOj has been widely used in tin Mossbauer spectroscopy, and has been tentatively adopted as a secondary differential chemical shift standard (Gordon

Conference, 1964) a careful study of this compound and its crystal structure has been made. Although published literature describes a single broad resonant absorbtion line, fine structure was observed. The broadening has been interpreted as an

unresolved doublet, due to quadrupole splitting, arising from

twinning in the (03 1 ) plane.

A table of comparison experiments of Sn02 source or absorber

for various tin compounds is included.

9207. NBS offers method to prevent built-up roof splitting failure,

W. C. Cullen, Roofing Siding Insulation Mag. 40, No. 4, 28- 30 (Apr. 1965).

Key words: Built-up roof membrane; innovation; preventive measures; splitting failures; thermal shock.

Innovations in roof design and roofing construction

procedures are described. The implementation of one or more of

these procedures should reduce premature failures in built-up

roofing membranes which are due to thermal contraction in cold

climates.

9208. Newly observed structure in the photoionization continua of Kr and Xe below 160A, K. Codling and R. P. Madden, Appl.

Opt. 4, 1431-1434 (Nov. 1965).

Key words: Atomic spectra; krypton; photoionization; vacuum ultraviolet; xenon. The absorption spectra of Kr and Xe have been photographed

in the 70-200A region, revealing many weak, previously

unobserved, resonances in the photoionization continua of these

gases. The new structures occurring in the 1 10-1 15A region for Kr and 145-160A for Xe are due to two-electron excitation

states involving an inner-shell d electron and an outer-shell p

electron. The resulting configurations are characteristic of the neutral atom, although they lie, in energy, well above the 3rd

ionization limits for these atoms. Additional resonances in Xe,

photographed in the 90A region, are due to the excitation of an

inner-shell 4p electron. An improved value has been obtained

for the N//; edge of Xe, namely 145.6 (±0.5) eV. These spectra were obtained using the pure continuum radiated by the NBS

1 80 MeV electron synchrotron as a background source.

9209. Progress in nuclear instrumentation, 1965 meeting of lEC

committee TC45, L. Costrell, Mag. Std. p. 9 (Jan. 1966).

Key words: Modules; nuclear instruments; progress; standards; state-of-the-art.

At the conclusion of World War 11 nuclear instrumentation was to a great extent concerned with detectors that required

essentially unsophisticated electronics. The advent of the

scintillation counter in the late 194G's called for an order of

magnitude improvement in the associated instrumentation.

Introduction of the semiconductor radiation detectors with their tremendous energy resolution capabilities stimulated additional

sophistication of nuclear electronics.

9210. Observatory reports, spectroscopy, C. E. Moore, Astron. J. 70, No. 9,637-639 (Nov. 1965).

Key words: Atomic spectra; multiplet tables; rare-earth

spectra; spectra, far ultraviolet; transition probabilities.

An annual report from the NBS in Washington on

spectroscopic research of astrophysical interest, is presented.

Analysis of rare-earth atomic spectra and of spectra observed in the far ultraviolet with synchrotron radiation as the source of

excitation are discussed. Other topics reviewed briefly are: wavelength standards, transition probabilities, the revised solar

table and new multiplet tables. A current bibliography is included.

921 1. Unassigned.

92 1 2. Phase rule considerations and the solubility of tooth enamel,

W. E. Brown and B. M. Wallace, ^««. N.Y. Acad. Sci. 131,

Art. 2, 690-693 (Sept. 30, 1965).

Key words: Calcium; hydroxyapatite; phosphate; solubility

isotherm.

The phase diagram is a particularly useful means of displaying

solubility information because it makes it easier to take into account several variables at one time. The use of the phase

diagram is illustrated in connection with the possible reactions

hat can take place when NaF - H3PO4 solutions are used to treat enamel. A critical quantity proves to be the concentration of

Na+ ion in the treatment solution.

Calcium and phosphorus ions may not diffuse through enamel

at the same rates. A situation in which calcium diffuses faster than phosphate would lead to increased concentrations of

calcium, phosphate and hydrogen ions within the enamel. This

in turn would lead to increased rates of diffusion and dissolution,

thus helping to account for subsurface dissolution of enamel.

9213. Unassigned.

9214. Photon absorption cross section of spherical nuclei, M. G.

Huber, H. J. Weber, M. Danos, and W. Greiner, Phys. Rev.

Letters 15,Uo. 12,529-531 (Sept. 1965).

Key words: Nuclear physics; photonuclear absorption cross

sections; spherical nuclei; theoretical physics.

The Dynamic Collective Theory is extended to vibrational

nuclei. The results of the theory are compared with recent photonuclear measurements. Agreement obtains within the accuracy of both the theoretical treatment and the experimental

uncertainties. It is concluded that the collective description of

the giant resonance is valid in spherical nuclei.

9215. Photoneutron production by Li«, Li^ B'», B", and 0'^ E. Hayward and T. Stovall, Niicl. Phys. 69, pp. 241-252 (July

1965).

Key words: Activation curve; cross-section; photoneutron.

The neutron emission cross sections have been measured from

targets of Li", Li', B'", B" and O'*' when they were irradiated with X-rays in the energy range from 7 to almost 30 MeV. The

integrated cross sections are 0.40±0.03, 0.49±0.04, 0.46±0.03,

0.43±0.03 and 0.27±0.02 MeV mb respectively. The average

cross sections for the lithium and boron targets appear to be

essentially constant in the energy range 25-30 MeV. The data

also suggest that the boron cross sections contain a great deal of

structure up to the highest energies studied. 9216. Photonuclear reactions, M. Danos and E. G. Fuller, Rev. Nucl. Sci. 15, 29-66 (1965).

Key words: Photon cross-sections; photon scattering;

photonuclear absorption; photonuclear reaction. The development of Photonuclear Physics since the last Annual Reviews report is described. The photon absorption process is treated both in the framework of the shell model and

he collective model. The modern computational methods are described from an elementary point of view. The available calculations and experiments are described. Their agreement

and their internal consistency is analyzed. The giant resonance

region in heavy deformed nuclei seems to be already quite well understood, both experimentally and theoretically. The

spherical non-closed shell heavy nuclei have not yet been

investigated well enough. For light nuclei, experimental data of

61
reasonable quality exist; the theoretical treatment is, however,

not yet adequate. The energy region above the giant resonance

is still terra incognita to a large extent.

9217. Unassigned.

9218. Polymerization and pyrolysis of poly-l,2-dihydronaphthalene, L. A. Wall, L. J. Fetters, and S. Straus, ( Froc. 150th

American Chemical Society Meeting, Atlantic City, N. J., Sept. 12-17, 1965), Polymer Preprint 6, No. 2, 930-939 (Sept.

1965); J. Polymer Sci. Part B; Polymer Letters 5, No. 8, 721-733 (Aug. 1967).

Key words: Degradation; polymerization; pyrolysis;

thermal decomposition; thermal volatilization; 1,2- dihydronaphthalene.

Polymerization of 1 ,2-dihydronaphthalene, using anionic

catalysts, gave intractable white powders insoluble in ail solvents

studied, with the exception of bis(phenoxyphenyl)ether at 290

°C. When dissolved, no appreciable viscosity increments could

be detected suggesting either low molecular weights or

degradation. In thermal volatilization studies, the polymer yields

about 35% monomer and vaporizes at rates near those for polystyrene. Single compacted pellets volatilized faster, however. Unlike the initial powders, pellets had detectable

electron spins which could be enhanced by partial pyrolysis. It is concluded that compacting the polymer enhances an exothermic

decomposition mechanism.

9219. Possible nuclear contribution to thermal expansion, E. C. Hirschkoff and N. M. Wolcott, Proc. Phvs. Soc. 86, No. 6, 1372 (1965).

Key words: Ferromagnetism; hyperfine field; NMR;

nuclear interaction; nuclear quadrupole resonance; thermal

expansion.

A significant contribution to the thermal expansion of a ferro- magnetic material at low temperatures due to nuclear interaction

with the static hyperfine field is predicted. Some numerical

examples are given for cobalt and rare earth metals.

9220. Unassigned.

9221. Unassigned.

9222. Progress report on a test for cleanability, M. D. Burdick,

Proc. Porcelain Enamel Inst. Forum, 26, 41-48 (1965).

Key words: Cleanability, porcelain enamel surfaces; fluorescent soils; porcelain enamel; soil, residual. The possible use of fluorescent soils for evaluating the

aesthetic cleanability of porcelain enamel surfaces is being

explored by the Research Associates. The method being

investigated consists of applying a soil containing a small amount

of a fluorescent compound to a specimen surface, subjecting the surface to a standard cleaning treatment, and then evaluating the

soil remaining on the surface by extracting the residual fluorescent material with toluene and measuring the fluorescence

of the resulting solution with a fluorometer. Preliminary results showed that the method was capable of detecting as little as one

part per billion of residual soil on a surface. Further work on the method is needed, however, to determine its reproducibility and

the degree of correlation of the test data with actual service.

9223. Progress report on the development of a standardized test for continuity of porcelain enamel coatings, M. A. Rushmer,

Proc. Porcelain Enamel Inst. Forum. 27, 49-56 (1965).

Key words: Bubble structure; confinuity of coating;

corrosion resistance; high-voltage testing; porcelain enamel;

porcelain enamel defects. Both chemical and electrical methods were investigated for detecting coating discontinuities in porcelain enamels. Chemical

methods were found to be time consuming; also, they were

incapable of detecting subsurface flaws of a type that can lead to early corrosion of the metal. For these reasons, emphasis was

placed on the use of a high-voltage discharge tester. Preliminary

work with the tester showed that architectural enamels that rusted in service could be separated from those that did not rust by probing the enamel surface at 1.5 kV. A higher voltage,

however, was required to obtain a separation of satisfactory and

unsatisfactory hot-water tank enamels. Although these results have been promising, additional work is indicated. 9224. Unassigned.

9225. Radiation of sound by earthquakes, R. K. Cook, 5'' Cong.

Intern. Acoustique, Liege, Belgium, 1965, lb, K19 (1965).

Key words: Earthquakes, radiation sound; ionospheric

m.otions; radiation sound; sound waves.

Earthquakes cause large motions of the earth's surface which

in turn radiate sound waves at infrasonic frequencies into the atmosphere. An analysis of the generafion and propagation of

sound waves into the upper atmosphere show that substantial ionospheric motions can occur. Such effects occurred during the Alaskan earthquake of March 1 964.

9226. Radiation-induced polymerization at high pressure of 3,3,3- trifluoropropene; 4,4,4,3,3-pentafluorobutene-l; and 5,5,5,4,4, 3,3-heptafluoropentene-l, D. W. Brown {Proc. 1 50th American

Chemical Society Meeting, Atlantic Citv, NJ., Sept. 12-17,

1965), Polymer Preprint 6,'No. 2,965-976 (Sept. 1965).

Key words: Gamma radiation; polymerization; pressure;

poly - 5,5,5,4,4,3,3 - heptafluoropentene - 1 ; poly -4,4,4,3,3 - pentafluorobutene- 1 ; poly-3 ,3 ,3-trifluoropropene.

The kinefics of the gamma-ray-induced polymerization of

3,3 ,3-trifluoropropene; 4,4,4,3,3-pentafluorobutene-l; and

5,5 ,5 ,4,4, 3,3-heptafluoropentene-l were investigated within the

overall pressure range 1 ,800-15,000 atm and temperature range 21-161 °C. The polymerizations are free radical in character. Their activation enthalpies, volumes, and entropies increase in the order: propene, butene, pentene. The maximum

polymerization rates observed exceeded 10%/hr. for each monomer at a dose rate of 1 ,500 rad/hr. The maximum intrinsic viscosities were 5.2 dl/g for polytrifluoropropene, 0.67 dl/g for polypentafluorobutene, and 0. 12 dl/g for polyheptafluoropentene.

The monomer transfer constant of 3, 3 ,3-trifluoropropene was

determined. Values range from 10 '^ to 4 x 10 -', increasing with

temperature increases at constant pressure and with pressure decreases at constant temperature. Transfer effectively

determines the molecular weight of polytrifluoropropene at temperatures above 70 °C; the molecular weights of the other

polymers are probably determined largely by transfer under all the experimental conditions studied.

9227. Relation of strength of thermally tempered glass to fracture mirror size, M. K. Kerper and T. G. Scuderi, Am. Ceram.

Soc. Bull. 44,No. 12,953-955 (Dec. 1965).

Key words: Fracture mirror size; modulus rupture;

thermally tempered glass.

The typical fracture of glass broken in flexure has a smooth

area which includes the fracture origin. The size of this smooth

area or "mirror" is dependent upon the stress introduced in the

glass by the thermal tempering process as well as that resulting

from flexure during testing of the specimens. The sizes of the mirror in fractures originating on the surface of annealed, semitempered or tempered specimens shows a relationship to the modulus of rupture of each type of specimen. This is also true

for fractures originating at the edge of annealed glass. For

fractures originating at the edge of semi-tempered and tempered

glass there is no consistent relationship between mirror size and

modulus of rupture.

62
9228. Scattering properties of concentric soot-water spheres for

visible and infrared light, R. W. Fenn and H. Oser, J. Appl.

Opt. 4, 1504-1509 (Nov. 1965).

Key words: Cloud physics; infrared light; light scattering;

Mie Theory; scattering functions.

Based on the theory by Aden and Kerker, computations of the

scattering and absorption properties for concentric spherical

water-and-particles have been performed for visible and infrared wave lengths. Computations were performed for size parameter

values up to 250. Results indicate that, for compound particles

with a nucleus smaller than about one-tenth of the total diameter

of the particle, the optical properties are almost completely

determined by the outer shell. Some results of the computations

are presented in graphical form for the scattering and absorption

efficiency factors and the angular scattering functions. The frequency dependence of the complex dielectric constant

is not taken into account in the actual computations: absorption,

scattering and total extinction are given for constant index of

refraction. The theory does allow to take this dependence into account, however, if one wishes to do so.

9229. Silicon-fluorine chemistry. II. Silicon-boron fluorides, P. L. Timms, T. C. Ehlert, J. L. Margrave, F. E. Brinckman, T. C.

Farrar, and T. D. Coyle,y./lw. Chem. Soc. 87, No. 17,3819-

3823 (Sept. 1965).

Key words: Boron; fluorine; NMR; polysilanes; silicon; sub-halides.

Silicon difluoride reacts with boron trifluoride, producing a

series of compounds with silicon-boron bonds. Nuclear

magnetic resonance studies of the compounds SizBF? and Si:iBF9 indicate that these are to be formulated as perfluorodisiianylboron

difluoride and perfluorotrisilanylboron difluoride respectively.

Physical and chemical studies of these new materials are reported.

9230. Solid-vapor equilibrium in the system helium-methane, M.

J. Hiza and A. J. Kidnay, (Proc. 1964 Cryogenic Engineering

Conf., University of Pennsylvania, Philadelphia, Pa., Aug.

18-24, 1964), Book, Advances in Cryogenic Engineering 11, 338-348 (Plenum Press, Inc., New York, N. Y., 1966).

Key words: Experimental; helium-methane; low

temperature; phase-equilibrium; solid-vapor.

Gas phase compositions in the solid-vapor region for the helium-methane system have been measured at seven integral

temperatures from 55.00° to 87.00 °K up to 140 atmospheres

pressure. Measurements were also made in the liquid-vapor

region at 91.00 °K to provide a direct comparison with the only

other gas phase data for this system available in the literature. A

flow system was used in which methane was evaporated into a pure helium gas stream. The gas phase leaving the equilibrium

cell was analyzed continuously with a hydrogen flame-ionization

detector. The data obtained are presented in both tabular and

graphical form. Comparison of 91.00 °K data from the present

investigation with the data from the literature at 9 1 . 1 °K shows a disagreement between the two sets by as much as a factor of

four.

923 1 . Some applications of the wave front shearing interferometer,

J. B. Saunders, Japanese J. Appl. Phys. Suppl. 1, 4, 99-105

(1965).

Key words: Interferometer; lens aberrations; prism

interferometer; testing of lenses.

This paper gives the results of several applications of the wave

front shearing prism interferometer. The instrument is very compact and easy to apply. It is applied to the testing of

chromatic aberration of simple and compound lenses; and to the

testing of wave forms that characterize the monochromatic

aberrations (spherical, coma and astigmatism). Results are shown for several different type lenses. This interferometer is equally applicable to the testing of small lenses and large

telescope objectives.

9232. Some statistical properties of pulses from photomultipliers,

M.Gadsden, Appl. Opr. 4, No. 11, 1446-1452 (Nov. 1965).

Key words: Noise, signal; photomultipliers; signal noise

ratio; statistical properties; time intervals. An examination of the integrated counts from 9502S and

9558A photomultipliers suggests that the statistical distribution

is closely Poissonian. An examination of the time intervals between consecutive pulses has shown an interesting effect: with

a 9502S tube, a highly significant, although small, number of

intervals are much longer than expected on a random hypothesis.

This effect is explicable in terms of a loss of electrons between

cathode and anode. Data on the variation of the signahnoise

ratio with differing discriminator bias levels are also presented.

9233. SPACEWARN"An international mechanism for rapid

distribution of information on satellites and space probes, A. H.

Shapley, COSPAR Info. Bull. 24, 30-55 (July 1965).

Key words: Radio service; satellites and space probes; space and satellites.

9234. Specification for dry cells and batteries, W. J. Hamer, ASA

C18.1,pp. 31 (1965).

Key words: Batteries; battery classification; battery

performance; battery terminals; battery tests; battery types.

This standard for dry cells and batteries includes

nomenclature, sizes, tests, and performance data on (1) Leclanche cylindrical cells, (2) Leclanche flat cells. (3) mercury

cells, (4) silver oxide button cells, (5) alkaline manganese dioxide

cells, (6) sealed nickel-cadmium cells, and on various types of

batteries made with the above types of cells. The types of

batteries covered include (1 ) lighting batteries, (2) safety-flasher

batteries, (3) transistor hearing-aid batteries, (4) general

transistor batteries, and (5) high- and low-voltage batteries. The

tests are designed to evaluate the performance of the cells and

batteries under simulated service conditions. Descriptions and

drawings of various classes of terminals are given.

9235. Spectrochemical analysis of high-temperature alloys by

spark excitation in argon and nitrogen, H. C. Dilworth, Am.

Soc. Testing Mater. Spec. Tech. Publ. 376 (1965).

Key words: Alloys, high-temperature; ambient air; argon;

atmospheres of argon; high-temperature alloys; nitrogen;

nitrogen and ambient air; spark excitation.

Spark excitation of high-temperature alloys in atmospheres of

argon, nitrogen, and ambient air were investigated. Compared to

air, argon or nitrogen provide the following advantages: (1) Volatilization rates are more constant in time. (2) Background

intensities are constant and independent of alloy composition.

(3) Effects of metallurgical history on specimen excitation are minimized. Also, self-absorption is markedly reduced in argon. Because of these characteristics, calibration is simplified, and it

is possible to analyze many different types of alloys with the same set of analytical curves. This results in a marked reduction

in the number of primary standards needed for initial calibration. An effective device for shielding the spark excitation column and

specimen surface with a stream of gas is described. Data are presented showing application of the method of excitation in argon and nitrogen to the analysis of a variety of hightemperature alloys.

63
9236. Spin-lattice relaxation of rare earth tons in LaCIa, B. W.

Mangum and R. P. Hudson, Bull. Am. Phys. Soc. Series II, 10, No. 8, 1 109 (Oct. 1965).

Key words: Rare-earth; spin-lattice relaxation.

Studies of spin-lattice relaxation of the ions Ce^+, Nd3+, Sm'+,

Ho''+, and Er^+ present in low concentrations (0.2 to 2 percent)

in the host lattice of LaCU have been made in the liquid helium

region by the pulsed-microwave method. The variation of the relaxation time, t, with temperature permits separation of the contributions to the relaxation from the two-phonon (resonant

and non-resonant) and single phonon processes. The substances studied are not "well-behaved"; features such

as non-exponential decays and variability of the derived values

for the splitting between the ground and first excited levels are discussed. Some of the ions exhibit a significant variation of t with concentration and Nd'+ shows an interestingly large

anisotropy of t in the Raman process.

9237. Standard frequency and time services of the National

Bureau of Standards, D. H. Andrews, Frequency 3, No. 6, 30- 35 (Nov.-Dec. 1965).

Key words: Broadcast of standard frequencies; high

frequency; low frequency; standard frequencies; time

signals; very low frequency.

Detailed descriptions are given of eight technical services provided by the National Bureau of Standards radio stations WWV, WWVH, WWVB, and WWVL. These services are: 1. Standard radio frequencies; 2. Standard audio frequencies; 3. Standard musical pitch; 4. Standard time intervals; 5. Time

signals; 6. UT2 corrections; 7. Radio propagation forecasts; and

8. Geophysical alerts.

9238. Standardization of the differential chemical shift for Fe^^ J. J. Spijkerman, F. C. Ruegg, and J. R. DeVoe, {Proc. New

England Nuclear Mossbauer Symp., New York. N.Y., Jan.

1964), Book, Mossbauer Effect Methodology, pp. 115-120

(Plenum Press, Inc., New York, N. Y., 1965).

Key words: Crystal structure; differential chemical shift; Mossbauer spectroscopy; quadrupole splitting; sodium

nitroprusside; standardization.

To provide Mossbauer data for Fe^' on a uniform basis, to eliminate recalculation of data from various laboratories, and to provide tables of Mossbauer spectra, the National Bureau of

Standards has included disodium pentacyanonitrosylferrate

dihydrate, Na2[Fe(CN)5NO] •2H2O, in the Standard Reference

Materials Program. Single crystals of sodium nitroprusside will be available by April 5, 1965 for this standardization. The

crystals are supplied by a commercial manufacturer, and

calibrated by NBS on a Mossbauer spectrometer, using an

optical fringe counting technique.

The Mossbauer spectrum of a single crystal absorber, cut along the be plane, is a well resolved, symmetric doublet. The

center of this doublet is defined as the zero reference point for the differential chemical shift, with the containing absorber at 25.0 °C. The absorber crystals supplied will be 1cm x 1cm, with

25.0 mg/cm- of natural iron.

9239. The ultrasonic velocity in fluid parahydrogen, B. A. Younglove, (Proc. IX Intern. Conf. Low Temperature

Physics, Columbus, Ohio, Aug. 31-Sept. 4, 1965), Book, Low

Temperature Physics LT9, Part B. 1223-1226 (Plenum Press,

Inc., New York, N. Y., 1965).

Key words: Adiabatic compressibility; hydrogen; sonic

velocity.

The ultrasonic velocity in fluid parahydrogen has been

measured in the temperature range 15° to 100 °K and in the density range 0.015 to 0.085 gm/cm''. Also the ultrasonic velocity in normal and parahydrogen of the saturated liquid has

been measured between 14.5 ° and 32.2 °K. The measurements

in the compressed liquid were made either on isochores or isotherms as desired. The density at each point was calculated from the thermodynamic data of Goodwin, et al. Ten megacycle crystals were used to generate and receive the sound by the pulsed method of Greenspan and Tschiegg in their measurements on water. In system tests using water good

agreement was obtained. Standing wave measurements that were taken on the saturated liquid also agree well with the pulsed

method. The results are compared with the velocity calculated from PVT and Ci, measurements of this laboratory and with

measured values from the laboratory of A. Van Itterbeek.

9240. Superconducting behavior of indium-lead alloys, S. Gygax,

J. L. Olsen, and R. H. Kropschot, (Proc. IX Intern. Conf. Low

Temperature Physics, Columbus, Ohio, Aug. 31-Sept. 4, 1964), Book, Low Temperature Physics LT9, Part A, 587-590

(Plenum Press, Inc., New York, N. Y., 1965).

Key words: Ginzburg Landau theory; indium lead alloys;

superconductivity.

In a recent publication Saint-James and de Gennes have

pointed out that thin superconducting regions can exist close to the surface of a superconductor in a magnetic field Hra which is higher than the upper critical field Hc2 given by the Ginzburg

Landau theory. They find Hc3=l. 691 Hc2- We have measured the temperature dependence and

concentration dependence of Hci, He, Hc2, and Hca on

polycrystalline indium lead alloys in the a phase region. The

experimental value found for is within 10% of the theoretical value and the experimental values of K agree very well with the Ginzburg Landau theory.

9241. Suppression of 60 e/s pickup when using sensitive DC

amplifiers, R. L. Nutall and D. C. Ginnings, Electron. Design

12, No. 26, 34-35 (Dec. 20, 1965).

Key words: DC-amplifiers; filter; pickup.

Measurements with two commercial low-level DC amplifiers

have shown that the use of simple one-stage series-resonant

input filter (RLC) enables them to be used with 60 c/s pickup

signals as large as volts, contrasted with tolerances of millivolts without the filter. The use of the filter also permits the amplifiers

to be used in the presence of 60 c/s pickup with relatively high

DC signal source impedances.

9242. Tables of dielectric constants, dipole moments and dielectric relaxation times, F. I. Mopsik, (1964 Digest of Literature on

Dielectric Conf. Electrical Insulation), Natl. Acad. Sci.-Natl. Res. Council Publ. No. 1342, 28, (Natl. Acad. Sci.-Natl. Res. Council, Washington, D. C, 1965).

Key words: Dielectric constants; dielectric relaxation

times; dipole moments.

Dielectric constant and dipole moment data have been

compiled from the 1964 literature. Much of the work continues

in the regions of interest of the previous years. The most

noteworthy measurement appears to be the detection of a dipole

moment in deuterated acetylene due to isotopic substitution.

9243. Tapered inlets for pipe culverts, discussion and author's

closure, J. L. French,/. Hydraulics, Div. Am. Soc. Civil Eng.,

286 (May 1965).

Key words: Culverts; hydraulics; inlets; model tests.

64
1

The original paper by the writer appeared in the March 1 964

issue of the Journal of the Hydraulics Division, ASCE.

Discussions of the paper appeared in the November issue of

the Journal, and the writer's closing discussion will appear in the March or May 1965 issue. The present digest of the paper is for Transactions, ASCE.

9244. The ADI auxiliary publications program, R. W. Zimmerer,

IEEE Trans. Microwave Theory Tech. MTT-13, No. 6, 883-

884 (Nov. 1965).

Key words: Documentation; information retrieval; publication.

A short Letter to the Editor of lEEE-MTT concerning The

American Documentation Institute's Auxiliary Publications

Program at the Library of Congress where the editor of any

recognized journal can deposit documents with the Photoduplication Service. This letter recommends that the lEEE-MTT Journal start using this service.

9245. The calibration of permanent magnet standards, L L. Cooter, {ISA 20th Annual Conference and Exhibit, Los

Angeles, Calif.. Oct. 4-7, 1965), ISA Preprint 14.1-3-65

(1965).

Key words: Calibration, permanent magnet standards;

magnet standards; permanent magnet standards; reference

magnets.

The increased demand for the calibration of permanent

magnets used as reference standards has required a new magnet

calibration facility at the National Bureau of Standards,

Washington, D. C. The method procedure and apparatus used in the calibration of reference magnets are described.

9246. The correlation of experimental pressure-densitytemperature and specific heat data for parahydrogen, H. M.

Roder, L. A. Weber, and R. D. Goodwin, (Proc. XI Intern. Congress Refrigeration, Munich, Germany, Aug. 1963),

Book, Progress in Refrigeration Science and Technology 1, 187-191 (Pergamon Press Inc., New York,N. Y., 1965).

Key words: Density; heat of vaporization; hydrogen;

parahydrogen; specific heat; thermodynamic function. The use of hydrogen in space vehicles and in nuclear devices

demands precise knowledge of its mechanical and thermal

properties.

The mechanical properties for parahydrogen are defined by

nearly 1200 closely spaced experimental P-p-T points. The

boundaries in temperature are 14° and 100 °K, while the experimental pressure ranges from 2 to 350 atm. The P-p-T

surface was approximated by a large number of polynomials

coupled with appropriate interpolation schemes. Use of the

virial expansion allows extrapolation to pressures below 2 atm.

Thermal properties may be obtained after relating the experiment above to a second one in which the heat capacity at constant volume was determined for a variety of experimental

conditions. At temperatures below critical these heat capacities

are used as primary data, while at temperatures above critical they serve as check on the correlation between the statistically calculated specific heats and the P-p-T data. Further tests of the

correlation arise when calculating thermodynamic functions. As a result of this correlation it is now possible to compute as function of pressure and temperature such quantities as specific

volume, enthalpy, entropy, specific heat at constant volume,

specific heat at constant pressure, sonic velocity, the Joule- Thompson inversion, and the heats of vaporization.

9247. The design of a federal statistical data center, E. Glaser, D.

Rosenblatt, and M. K. Wood, Statistical Evaluation Report

No. 6, Office of Statistical Standards, Bureau of the Budget,

Appendix C, pp. 1-19 (Office of the President, Washington, D. C.,Dec. 1965).

Key words: Automatic data processing equipment;

confidentiality audits; disaggregation; disclosure criteria; Federal statistical system; inherent computability;

matching; probability master samples; propagation of error computations; statistical standards.

This paper treats the principles underlying the design of a Federal Statistical Data Center intended to provide a better integrated information network for use by Government,

industry, and the research community in an age of large-scale

computers.

9248. The dielectric polarizability of fluid parahydrogen, J. W.

Stewart, (Proc. IX Intern. Conf. Low Temperature Physics,

Columbus, Ohio, Aug. 31-Sept. 4, 1965), Book, Low

Temperature Physics LT9, Part B, 1230-1232 (Plenum Press Inc.New York,"N. Y., 1965).

Key words: Dielectric polarizability; dipole moment; fiuid parahydrogen; macroscopic polarizability.

In the case of nonpolar substances such as hydrogen the macroscopic polarizability (induced dipole moment per unit mass per unit electric field) P is related to the dielectric constant

e and the density p through the Clausius-Mossotfi equation:

P='-^-^

e + 2 p

Elementary theory predicts that the righthand side of the equation, often called the Clausius-Mossotti funcfion, should be

a constant independent of density. Detailed verification of this requires accurate measurements of both e and p over as wide a range of conditions as possible. Sufficiently accurate measurements of p have previously been available for normal

hydrogen, but a really meaningful investigation of the constancy

of P for fiuid parahydrogen over a wide range of density in both

the gaseous and liquid states has been made possible only

recently by the high-precision density measurements in this laboratory by Goodwin and his co-workers. Their values of p

are estimated to have an absolute precision of better than 0. 1 %.

They are internally consistent to 0.02%. For corresponding

precision in the calculated values of P, the dielectric constant must be determined to considerably higher accuracy.

9249. The effect of insulation on the weathering of smoothsurfaced built-up roofs exposed to solar heating, W. C. Cullen

and W. H. Appleton, Coal Tar Asphalts Related Mater. 3, 122-124 (Mar. 1965).

Key words: Built-up roofing; deterioration insulation; radiative cooling; solar heating.

The effects of solar heating on the weathering characteristics of smooth-surfaced, built-up roofings applied over insulation are

discussed. Data are presented giving the temperatures attained

at the underside of smooth-surfaced, built-up roofings placed

either over insulation or directly on a concrete deck.

Photographs are given showing the differences in the weathering

between the insulated and non-insulated roofings observed in the laboratory and in the field. The data show that roofings placed over insulation are subjected to much higher maximum

temperatures, more rapid temperature changes, and greater sub- cooling on clear nights than similar roofings placed directly on

concrete decks.

9250. The interaction of radiation with charged particles. I, W. R. Chappell, W. E. Brittin, and S. J. Glass, // Nuovo Cimento 38,

No. 3, 1 186-1 191 (Aug. 1965).

Key words: Charged particles; electrons and photons;

interaction of radiation; radiation, charged particles.

65
We employ the Bogoliubov-Tyablikov transformation and an

equation of motion method, utilizing part of the Hamiltonian for a system of interacting electrons and photons, to obtain the

familiar dispersion relation, cu- = k-c + tup-, for a system of quasiphotons. The equation of motion method can be used to obtain an extended dispersion relation when more terms of the Hamiltonian are taken into account.

9251. Unassigned.

9252. The important atmospheric processes in the D region, G. C.

Reid, Proc. COSPAR Polar Cap Panel Symp., Alpach,

Austria, 1964, pp. 15-19 (Academic Press Inc., New York, N.

Y., 1965).

Key words: D region; ionosphere; negative ions; photodetachment; recombination.

This is a summary of a review paper delivered at the Symposium on High-Latitude Particles and their Effects on the Polar Ionosphere. Current knowledge of D-region reactions is reviewed and outstanding problems are discussed.

9253. The microwave spectrum of dinitrogen trioxide, R. L. Kuczkowski,y. /Iw. Chem. Soc. 87, 5259-5260 (1965).

Key words: Dinitrogen trioxide; equilibrium; microwave

spectrum; structure. The microwave spectrum of four isotopic species of dinitrogen

trioxide is reported which support the planar ON-NO2 model

with C.S symmetry and from which the N-N bond is determined

to be 1.85 with an estimated uncertainty of ±0.03 A.

9254. The monomer-polymer equilibrium of a-trideuteromethyl-

/3,/3-dideuterostyrene, L. J. Fetters and L. A. Wall, (Proc.

1 50th American Chemical Society Meeting, Atlantic City, N.

J., Sept. 12-17, 1965), Polymer 'Preprint 6, No. 2, 899-903

(Sept. 1965).

Key words: Equilibria; equilibrium concentration of

monomer; a-trideuteromethyl-^,j8-dideuterostyrene; lowering of steric repulsions; polymeric anion; AH; AS. The equilibria between a-trideutero-methyl-/8,/3-dideuterostyrene and its polymeric anion in tetrahydrofuran has been

investigated between 262 and 308 °K. The heat and entropy

changes were both increased significantly by the deuteration.

Qualitatively the effect observed appears best explained by the premise that a lowering of steric repulsions occurs with

deuterium; and hence the effective volume for deuterium is less than that for hydrogen.

9255. The NBS cryogenic data center, V. J. Johnson, (Proc. XI

Intern. Conf. Refrigeration, Munich, Germany, 1963), Book,

Progress in Refrigeration Science and Technology, 1,110-114

(Pergamon Press, Oxford, England, 1965).

Key words: Cryogenic data center; cryogenic fluids; low

temperature properties of materials; NBS cryogenic data

center; thermodynamic and transport properties.

A brief description is given of the two principal activities of the Cryogenic Data Center, namely: the evaluation and compilation

of data on low temperature properties of materials; and the

acquisition, handling and dissemination of technical literature. A

program for thorough evaluation and the compilation of

thermodynamic and transport properties of cryogenic fluids and

selected solids is mentioned. Four functions of the literature service are outlined and typical pictures of the operation

included.

9256. The NBS instrumentation for use in the measurement of

spectral irradiances of solar simulators, R. Stair and W. E. Schneider, Proc. Intern. Symp. Solar Radiation Simulation,

Los Angeles, Calif, Jan. 18-20, 1965, pp. 75-94 (Inst. Environmental Sciences and Am. Soc. Testing and Materials,

1965).

Key words: Integrating sphere; solar simulator;

spectroradiometer; standard of spectral irradiance.

Three methods are described for the measurement of the

spectral irradiances of solar simulators at the National Bureau of

Standards. The design of acceptable equipment is significantly affected by large variations in sensitivity of photoelectric and

thermoelectric detectors with the wavelength and over their surfaces. The first instrumentation consists of a conventional

spectroradiometer in which the source flux is collected in an

integrating sphere which insures accurate evaluation of the solar simulator flux in terms of that from a 1000-watt lamp standard of

spectral irradiance. A MgO-coated sphere is used for the

ultraviolet, visible and near infrared to 1 .6 microns.

9257. The radiation induced polymerization of hexafluoropropylene at high temperature and pressure, R. E. Lowry, D. W.

Brown, and L. A. Wall, (Proc. 150th American Chemical

Society Meeting, Atlantic City, N. J., Sept. 12-17, 1965).

Polymer Preprint 6, No. 2, 977-984 (Sept. 1965), J. Polymer

Sci. 4, Part A-1 , No. 9, 2229-2240 (Sept. 1966).

Key words: Activation enthalpy; hexafluoropropylene; high

pressure; intrinsic viscosity; radiation induced

polymerization; radiation intensity.

The radiation-induced polymerization of hexafluoropropylene was studied in the pressure and temperature range 4,500-15,000

atm and 100-230 °C, respectively. Retardation was a serious

problem; data thought to apply to the unretarded polymerization

are summarized below. At 1,500 rad/hr the polymerization rate was 15%/hr at 230 °C and 15,000 atm. The activation enthalpy

and volume are 9.5 kcal/mol and -10 cc/mol respectively. The

rate varies as the square root of the radiation intensity. The

largest intrinsic viscosity of the polymer is 2.0 dl/g; values

increase with temperature and pressure. At 130 °C and 10,000

atm the intrinsic viscosity was the same at two radiation

intensities.

9258. The response of flush diaphragm pressure transducers to thermal gradients, L. Horn, (20th Annual ISA Conference and

Exhibit, Los Angeles, Calif, Oct. 4-7, 1965), Preprint No.

13.3-4-65 (1965).

Key words: Flush diaphragm; pressure gage; temperature;

temperature gradient; transducers. The zero signal output of pressure transducers may alter during field use in the presence of thermal gradients. The

changes can be large enough to cause serious questioning of the

validity of test data taken without corrections for the zero shift.

Variations of up to 100% FS (full scale) have been found using

transducers that indicated less than a 6% shift in the standard

steady state temperature tests. A simple method of dynamic testing is described and

experimental results are given for a number of tests.

9259. The theory of the chromospheric spectrum, J. T. Jefferies,

Book, The Solar Spectrum. Ed. C. DeJager, 131-150 (D.

Reidel Publ. Co., Dordrecht, The Netherlands, 1965).

Key words: Chromospheric flash spectrum; chromospheric

spectrum; solar disk; spectrum.

The article reviews the problems of interpretation of (a) weak

lines in the chromospheric flash spectrum and (b) strong lines whose profiles are measured from center to limb on the solar

disk. Typical methods for these interpretations are considered

and new ones put forward. Outstanding problems are delineated.

9260. Unassigned.

66
9261. Unassigned.

9262. Unassigned.

9263. Thermodynamics of the rigid-rotor at high temperature, J. E. Kilpatrick, Y. Fukuda, and S. Y. Larsen,y. Chem. Phys. 43,

No. 2,430-432 (July 1965).

Key words: Rigid-rotor, high temperatures; thermodynamic

properties; thermodynamics, rigid-rotor.

It is shown that Qe, the partition function for a rigid-rotor

summed over even levels and Qo, summed over odd levels, have

exactly the same asymptotic (power series in a=h''l2\kT)

expansion. No information as to differences in thermodynamic

properties due to spin and statistics can be obtained from this expansion. The exchange partition function, Qe-Qo, is calculated

directly and used to give simple expressions for the differences in thermodynamic properties between the para, ortho, and

equilibrium cases.

9264. Thermolytic chain scission of linear polyethylene and an

ethylene-propylene copolymer, H. Yu and L. A. Wall, (Proc.

150th American Chemical Society Meeting, Atlantic City, N

J., Sept. 12-17, 1965), Polymer 'Preprint 6, No. 2, 94()-944

(Sept. 1965).

Key words: Copolymer; ethylene-propylene; linear polyethylene; stress relaxation; thermolytic chain scission.

Thermolytic chain scission of a linear polyethylene and

(70:30) ethylene-propylene copolymer was studied with the

stress relaxation in vacuo at 260 ~ 320 °C. The mode of

thermolytic chain scission is random along the backbone carboncarbon bonds. The activation energy for the ethylene-propylene

copolymer is found to be 42 kcal/mol; 73 kcal/mol for linear polyethylene. The results for the polyethylene are in agreement

with those obtained by the study of rate of volatilization at 400 ~ 420 °C.

9265. Unassigned.

9266. Voltmeter calibration to 1 GHz, M. C. Selby, W. J. Blank,

and R. P. Chariton, (1965 Wescon Conference, San

Francisco, Calif, August 1965), IEEE WESCON Tech.

Papers 9, Part 6, No. 8.8, 1-12 (1965).

Key words: Calibration, high-frequency voltages;

measurement, microwave voltages; voltage, high-frequency,

calibration; voltage measurements; Voltage Tee. A novel Voltage Tee to calibrate meters to I GHz is described. It eliminates errors caused by standing waves over an

extremely wide range of voltmeter input impedances. It considerably reduces the RF calibration power required, as compared with conventional matched Tees.

9267. Winter anomaly in ionospheric absorption and stratospheric

warnings, A. H. Shapley and W. J. G. Beynon, Nature 206,

1242-1243 (June 1965).

Key words: Absorption, ionospheric; ionospheric

absorption; stratospheric warnings; winter anomaly.

9268. Methods of determining Coriolis zeta constants, S. Abramowitz and 1. W. Levin, J. Mol. Spectry. 19, No. 4, 461-

462 (Apr. 1966).

Key words: Band contours; BF^; Coriolis force; force

fields; high resolution; infrared; v-u vibration-rotation; ^4. The recently observed high resolution spectrum of the 1-3 fundamental of BFn has been interpreted to yield a Coriolis ^ constant in agreement with that found from an investigation of

the unresolved band contour.

9269. Magnetization and critical fields of superconducting SrTiO.i, E. Ambler, J. H. Colwell, W. R. Hosier, and J. F. Schooley,

Phys. Rev. 148, No. 1 , 280-286 (Aug. 5, 1966).

Key words: Critical fields; heat capacity; magnetization

curves; semiconducting SrTiO.t; superconducting SrTiO,').

Magnetization curves from T=0.15 °K to Tr have been

measured for two specimens of semiconducting SrTiOa of

electron density about 10'" cm'^. Magnetic hysteresis was

observed in each case. The temperature dependences of the first and second critical fields have been measured. The heat

capacity has been measured down to 0.3 °K for one specimen,

yielding y, the coefficient of the linear term, and an independent

value of Tr at the upper part of the specific heat anomaly. Values

of He (0) derived on the basis of the heat capacity data are higher

than the values of Hc(0) obtained from the magnetization data. The Ginzburg-Landau k is shown to vary inversely with the electronic mobility, as expected.

9270. The determination of heats of formation of refractory

compounds, G. T. Armstrong and E. S. Domalski, Proc. 4th

Meeting Interagency Chemical Rocket Propulsion Group,

Working Group on Thermochemistry, Kennedy Space Flight

Center, Florida, March 16-18, 1966, I, No. 108, 15 (Chemistry Propulsion Information Agency, Silver Spring,

Md.,June 1966).

Key words: Aluminum borides; boron; boron carbide;

carbon; fluorine; heat of combustion; polytetrafluoroethylene (Teflon); refractory compounds.

Refractory compounds have an application in propellants as possible ingredients of air breathing engines. In a study carried out for the Air Force Aero Propulsion Laboratory, Wright

Patterson Air Force Base, the heats of combustion of several boron compounds in fluorine were studied with a view to determining their heats of formation from the elements. To

determine auxiliary data for calculating the heats of formation of

the compounds, the heats of combustion of fluorine of

polytetrafluoroethylene (Teflon), graphite, and boron were

determined also. Analysis of the compounds becomes a major

problem in deriving heats of formation from the observed

calorimetric data. The effects of analysis in the interpretation of

the data are discussed. The presentation is in the nature of a summary. Details will be presented in projected publications.

9271. What environment-for whom? G. E. Auman, Civil Service J. 7, No. 1,6-11 (July-Sept. 1966).

Key words: Environment; personnel; professional

environment; professional personnel; scientists and

engineers; standing committee; technical personnel.

Since the early 1960's the Standing Committee of the Federal

Council for Science and Technology has been studying,

analyzing and making recommendations designed to improve the environment for Federal scientists and engineers. During 1965

the Committee queried 1,025 scientists and engineers in 17 Federal laboratories concerning the importance of 5 1 carefully selected environmental features and their satisfaction with

provision of these features in the Federal service. The survey

revealed extreme variations in the attitudes of respondents with

regard to virtually every item. However, some clearly defined

patterns and relationships among subgroups were identified when respondents were subclassified by discipline, education,

grade level, type of work performed, employing laboratory , etc.

Overall the features ranking highest in importance were those

concerned with professional values, appropriate and equitable pay, and adequate on-the-job support. Some items of generally

low importance were patent rights, separate classification titles for scientists and engineers, security controls and sabbatical

67
leave. In view of the wide disparity in satisfaction expressed by

persons in individual laboratories and subgroups, it is suggested

that agencies and laboratory directors might profitably undertake

similar surveys and specific improvement programs for their

installations.

9272. Photoionization of w-butane at 1067-1048 A,

Decomposition of the parent ion and superexcited molecule, P. Ausloos and S. G. Lias, J. Chem. Phys. 45, No. 2, 524-535

(July 15, 1966).

Key words: Butane; ionization efficiency; ion-molecule

reactions; ion-pair yields; photoionization; superexcited

molecule.

/7-C4D,o, «-C4D,o, CD3CH2CH2CD3, and C4D,o - CsDb

mixtures have been irradiated in the presence of oxygen with the argon resonance lines at 1067 A and 1048 A. On the basis of

saturation ion current measurements, the ionization efficiency

ratios T)CAD\al'r)No and •)7woTjr4Hio/T),vo were estimated to be 0.48

±0.003 and 0.465 ±0.003, respectively. It is demonstrated

that at the argon resonance lines the C4H,o+ ion undergoes

fragmentation according to the following two processes:

C4H,0+ ^ C3H? + CH3

^C3H^ + CH4

The isotopic analysis of the propane fraction formed in the

irradiation of n-C4Hio-«-C4Dio-02 mixtures indicates that the propyl ion which reacts with n-butane to form propane by a H' or D' ion transfer has the iec-propyl ion structure. It is further shown that, in agreement with recent studies on ion-molecule

reactions, the CsHe^ ion also reacts with C4H10 to form C3H8

(H2 -transfer). The yield of the parent ion was estimated by

making use of the recently established H2-transfer reaction: C4H,„+ -I- C3D6 ^ CD3CDHCD2H + C4H8+.

The fragmentation of the butane parent ion is strongly

quenched by an increase in the pressure of butane, or upon

addition of an inert gas. The following approximate relative efficiencies for the quenching of the fragmentation of the excited

C4D10+ ion are obtained: He - 1, N - 5, C4D10 - 35. It is also noted that the fragmentation of the C4D10+ ion is more readily

quenched by collision with He than that of the C4H10+ ion by

about a factor of 5. The fragmentation of the neutral excited molecule has been

examined briefly on the basis of the isotopic analysis of products

formed in the photolysis of CD3CH2CH2CD3 - O2 mixtures at 1470 A, 1236 A, and 1067 A- 1048 A, and of those formed in the photolysis of C4D10 - H2S mixtures at 1236 A. It is concluded

that the modes of decomposition of the superexcited molecule

are essentially identical to those observed for molecules excited

at photon energies below the ionization energy, although the elimination of an H2 molecule or an alkane may be of lesser importance at the shorter wavelength.

9273. Ion-molecule reaction in the liquid and solid phase radiolysis

of hydrocarbon mixtures, P. Ausloos, A. A. Scala, and S. G.

U&sJ.Am. Chem. Soc. 88, 1583-1584 (1966).

Key words: Hydrocarbons; ion-molecule reactions;

radiolysis.

Experimental results are presented which for the first time

demonstrate that ion-molecule reactions occur in the liquid and

solid phase radiolysis of hydrocarbons and that they can be

investigated in a systematic manner.

9274. The National Bureau of Standards and its contributions to geophysics, D. Baker, Trans. Am. Geophys. Union 17, No. 4,

563-568 (Dec. 1966).

Key words: Geophysics; gravity; ionosphere; seismology.

Almost from its inception the National Bureau of Standards

has made contributions to the field of geophysics. Major

contributions are reviewed, including gravity measurements,

IG Y participation, seismology, and atmospheric and ionospheric

investigations.

9275. Sodium-electron spin-exchange collisions, L. C. Balling,

Phys. Rev. 151, No. 1,1-6 (Nov. 4, 1966).

Key words: Electron; optical pumping; sodium; spinexchange.

A spin-exchange optical pumping experiment to study

collisions between sodium atoms and free electrons is reported.

In this experiment, electrons in a weak magnetic field were

polarized by spin-exchange collisions with opfically pumped

sodium atoms. The sodium-electron collisions were the principal source of the electron resonance linewidth, and they also produced a shift in the electron resonance frequency. The

magnitudes of the linewidth and the frequency shift depend upon

the scattering amplitude for sodium-electron collisions, the sodium polarization and the sodium atom density. The ratio of

the frequency shift to the linewidth was 0.03. The sodium

polarization was approximately 30%. The electron resonance

frequency was lower when the sodium polarization was positive.

The measurements of the electron linewidth and the frequency

shift agree with theoretical values of the linewidth and frequency

shift obtained from the sodium-electron scattering phase shifts which have been recently calculated by Garrett.

9276. The absorption spectrum of RbD. Vibrational numbering of

the A'S state of RbH, I. R. Bartky,7. Mol. Spectry. 21, No. 1, 1-3 (Sept. 1966).

Key words: Absorption spectroscopy; alkali metal

hydrides; hydrides; isotope relations; molecular constants. RbD has been observed in absorption from 5200-5400 A. Of

the several bands observed in this region, two have been

analyzed in detail. The RbD spectrum correlates with the RbH

spectrum only if the vibrational numbering of the A'S state of

RbH is increased by 3. Revised molecular constants for RbH

are given.

9277. The absorption spectrum of cesium deuteride. The A'S state of CsH, 1. R. Bartky,7. Mol. Spectry. 21, No. 1, 25-28 (Sept.

1966).

Key words: Absorption spectroscopy; alkali metal

hydrides; hydrides; isotope relations; molecular constants. An analysis of the visible absorption spectrum of CsD has

shown that the vibrational numbering of the A '2 state of CsH

must be increased by 3. From this and previous reassignments

of the A'2 states of KH and RbH, it is now possible to exhibit

the trends of the vibrational and rotational constants for the

alkali metal hydrides.

9278. The A'2 - X'l transition of ''KH and "KD. Vibration

numbering and molecular constants, 1. R. Bartky, J. Mol.

Spectry. 20, No. 4, 299-3 1 1 (Aug. 1966).

Key words: Absorption spectroscopy; alkali metal

hydrides; hydrides; isotope relations; molecular constants. The absorption spectrum of KD has been observed in the 5100-5200 A region. An analysis of the spectrum in this region

has shown that the previous assignments of the KD and KH

spectra are in error. The v'-numbering of KD must be increased

by 3, and the J-numbering of the P and R branches must be

decreased by 1 ; the v'-numbering of KH must be increased by 2. Re-analysis of the existing data on KH and KD has given a consistent set of vibrational and rotational constants for the

states of these molecules.

68
9279. An improved design for vacuum ultraviolet resonance lamps, A. M. BassMppl. Opt. 5, No. 12, 1967 (Dec. 1966).

Key words: Electric discharge; resonance lamp: vacuum

ultraviolet; window seal. A method is described for sealing lithium fluoride windows to resonance lamp discharge tubes so as to avoid damage to the seal by action of the discharge.

9280. Message from outgoing editor, R. W. Beatty, IEEE Trans. Microwave Theory Tech. MTT-14, No. 4, 170 (Apr. 1966).

Key words: Abstracts; editing; journals; publishing;

redacting.

The outgoing editor notes the growth of the Transactions and

the addition of the microwave abstracts. He calls attention to the formation of a panel of editors and their activities. He observes

the intricate process of publishing a Transactions and notes that although it does not reach the readers promptly, steps are being

considered which will speed up the process. Recognition is given to the contributions of others in getting out the Transactions and confidence is expressed in the new

editor and in the future of the Transactions.

9281. Mass-spectrometric study of photoionization IV. Ethylene

and 1,2-dideuteroethylene, R. Hotter, V. H. Dibeler, J. A. Walker, and H. M. Rosenstock, J. Chem. Phys. 45, No. 4, 1298-1301 (Aug. 15, 1966).

Key words: Autoionization; 1,2-dideuteroethylene;

ethylene; mass spectra; photoionization; Rydberg;

threshold energies.

Photoionization efficiency curves for ions of the molecule and

of selected fragments of CjH^ and CHDCHD are reported for the wavelength region from onset of ionization to 600A. The

minimum threshold of ionization is 1 0. 50 eV for both molecules.

In addition, certain features of the ion yield curves are discussed

and identified as resulting from vibrationally excited states or from autoionization from Rydberg levels leading to

electronically excited states. Threshold measurements of the acetylene ions permit calculation of heats of dissociation and

indicate that the C2H2+ ion is formed without excess activation energy. Of the vinyl ions, the threshold for the CzHs"*" ion is the most cleariy defined and leads to a C2H3-H bond dissociation

energy of 100 kcal/mol (418 kJ/mol).

9282. Exchange and direct second virial coefficients for hard

spheres, M. E. Boyd, S. Y. Larsen, and J. E. Kilpairick, J. Chem. Phys. 45, No. 2, 499-508 (July 15, 1966).

Key words: Hard spheres; quantum statistics; quantum

virial coefficient; second virial coefficient. We have separated the quantum mechanical second virial coefficient for hard spheres, B, into two terms. The first represents the contribution of a Boltzmann gas, and the second is an exchange term embodying the effects of quantum statistics. Numerical computation of B to a high precision then allows us to analyze the temperature dependence of the exchange term - which is found to decrease exponentially with temperature - and

to determine the asymptotic expansion of the Boltzmann term at high temperatures.

9283. The National Standard Reference Data System, E. L. Brady,

J. Chem. Doc. 7, No. 1,6-9 (Feb. 1967).

Key words: Future plans; National Standard Reference

Data System; objectives; operation; status. The National Standard Reference Data System is a government-wide effort to give to the technical community of the United States optimum access to quantitative data on the physical and chemical properties of substances and their

interactions, critically evaluated and compiled for convenience.

The general functions of the System are to coordinate and

integrate existing data evaluation and compilation activities into a systematic, comprehensive program, supplementing and

expanding technical coverage when necessary, establishing and

maintaining standards for the output of the participating groups, and providing mechanisms for the dissemination of the output as required. This program was established as a Federal policy in 1963 upon the recommendation of the Federal Council for Science and Technology. The National Bureau of Standards of

the Department of Commerce has accepted responsibility for administering the effort. The plan of operation and the general

status of activities initiated by the National Bureau of Standards

will be described.

9284. Unassigned.

9285. Photodetachment cross section, electron affinity, and

structure of the negative hydroxyl ion, L. M. Branscomb, Phys. Rev. 148, No. 1, 11-18 (Aug. 5, 1966).

Key words: Cross section; electron affinity; molecular

structure; negative hydroxyl ion; OD- ions; OH- ions; photodetachment.

Experimental data on the cross section for photodetachment

of OH- and OD" ions are given and used to argue that re(OH )=

re(OH)± 0.0002 A, that coe(OH-) = 3700 ±560 cm"' and that the OH electron affinity E. A. (OH) = 1.83 ±0.04 eV. Thus, the

structure of OH" and OH are remarkably similar, which is consistent with the theoretical predictions of Cade.

9286. Flash photolysis of methane in the vacuum ultraviolet. 1. End-product analysis, W. Braun, K. H. Welge, and J. R. McNesby. J. Chem. Phys. 45, No. 7. 2650-2656 (Oct. 1, 1966).

Key words: Acetylene; combination; ethane; ethylene; flash photolysis; gas phase; hydrogen; hydrogen deuteride;

insertion; methane; methyne; rate; vacuum ultraviolet.

Methane and mixtures of methane and methane-d4 have been

subjected to flash photolysis in the vacuum ultraviolet. Ethylene

is the major hydrocarbon product. Isotopic distributions of the hydrogen, ethane and ethylene fractions as well as complete

product analysis suggest that CH plays a dominant role in the

photolysis. The CH is formed either by direct dissociation of

excited methane or secondary flash photolysis of CH2 in the

flash. On the basis that acetylene is formed with unit efficiency

by association of CH, and ethylene is formed by reaction of CH

with methane, the collision yield of the latter reaction is about

1/82.

9287. A vacuum ultraviolet flash photolysis apparatus, W. Braun,

A. M. Bass, and A. E. Ledford, Jr.,^pp/. Opt. 6, No. 1,47-49

(Jan. 1967).

Key words: Apparatus description; flash photolysis; vacuum ultraviolet. An improved apparatus for performing vacuum ultraviolet flash photolysis-kinetic spectroscopy has been constructed. The

device consists of a compact coaxial arrangement of six capacitors and six electrode pairs, symmetrically placed about a hexagonal reaction vessel of large aperture. The reaction vessel contains LiF windows to transmit far ultraviolet radiation. The

six pairs of electrodes and six capacitors are connected

separately and are synchronously fired, uniformly illuminating the reaction cell. The photolytic light pulse duration is about 5 p. sec. More than 10'* quanta enter the reaction vessel in the

spectral region between 1050 A and 1600 A. The essential operating features of the apparatus are described.

69
9288. Chemiluminescence of CH in the O+C^H^ reaction: Rotational relaxation and quenching, W. Brennen and T. Carrington, J. Chem. Phys. 46, No. 1, 7-18 (Jan. 1, 1967).

Key words: Acetylene; CH; chemiluminescence; cross

section; emission spectrum; energy transfer; experimental;

gas; oxygen atom; oxidation; population distribution;

rotation. Rotational distributions of CH(A''A, v = 0) were measured at pressures from 0.1 to 8.5 torr in the O + C2H2 reaction in the presence of large excess of N^, Ar, or He. The reaction N+ NO

-*N2+0 was used to produce O without O2. Under all conditions the distributions are found to be a superposition of two

Boltzmann distributions, one at 1200-1400 °K characteristic of

the process leading to the formation of excited CH(A^A), and

one which stays close to the temperature of the reactor. Interpreting the fraction of molecules in this low temperature

distribution as a measure of the extent of relaxation of the initial rotational distribution of excited CH, average relaxation rate constants are derived. With the collision partners mentioned

above, 10 to 30 collisions are required for relaxation. A 14-level phenomenological mode! including only transitions between

neighboring rotational levels (K ^ K± 1 ) fits the experimental

distributions well at all pressures studied if the downward rate constants, Ica-i.a are approximately proportional to exp

(— 2BK/kT), where B=14.6 cm"' is the rotational constant for CH(A-A, v=0) and T=360 °K. Other models are discussed.

Rotational and vibrational distributions for CD(A-A) are also described. Quenching of the CH(A^ X)emission by added

oxygen was studied quantitatively and the results are consistent

with a mechanism in which not CH(A-A) but a precursor to its formation is removed by O2. In the absence of O2 the lifetime of

the precursor is determined primarily by the atomic oxygen

concentration.

When an electrical discharge through O2 is used as the source

of oxygen atoms for reaction with acetylene, the rotational distribution of CH(A-A) and its pressure dependence is quite

different from that described above. When acetylene reacts with

the products of a discharge through COj with excess CO2 as heat

bath, the rotational distribution of CH(A-A) has a Boltzmann

form at all pressures, with only the rotational temperature

depending on pressure and approaching the gas kinetic temperature at high pressure.

9289. Spin-relaxation effects on the EPR spectrum of gaseous

i-state atoms, R. L. Brown and W. Brennen, J. Chem. Phys.

46, No. 1, 385-386 (Jan. 1, 1967).

Key words; Electron paramagnetic resonance; flow system

kinetics; hydrogen atoms; nitrogen atoms; spin exchange

cross sections; spin relaxation time.

Experimental evidence has been obtained which indicates that N atoms produced in a flow system by a microwave discharge

through purified N2 had a "spin-lattice" relaxation time of the order of 25 milliseconds. The residence time of the atoms in the EPR magnet was comparable to this. As a result, the atoms

(which were generated outside of the magnet) arrived at the microwave cavity before reaching their equilibrium

magnetization. The EPR absorption intensity was abnormally

small since the population difference between the Zeeman levels was smaller than at equilibrium.

9290. Unassigned.

9291. Influence of paramagnetic resonance on the static susceptibility. The lattice-bath relaxation time of neodymium

ethylsulfate, G. A. Candela and R. E. Mundy,y. Chem. Phys.

46, No. 1,47-54 (Jan. 1, 1967).

Key words: Electron static susceptibility; lattice-bath; neodymium ethylsulfate; relaxation time; spin saturafion.

The spin-lattice-bath relaxation process of neodymium

ethylsulfate was investigated by measuring simultaneously the change in the static susceptibility and the microwave power

absorbed at electron spin resonance. This technique can be used

at constant temperature to distinguish the spin-lattice process from the lattice-bath process. The relaxation time of neodymium

ethylsulfate was studied at a microwave frequency of 14.5 G Hz

as a function of temperature, helium exchange gas pressure, microwave power absorbed, two crystal orientations, and crystal

size. At this microwave frequency the energy transfer from the

lattice to the bath appears to be the rate determining process. The dominant lattice-bath relaxation time, r,„ is inversely

proportional to the square of the bath temperature 7,,T-=0.20 sec °K- but is apparently independent of the crystal size, the helium

exchange gas pressure, and crystal orientation. The

experimental data are in essential agreement with the data

obtained by other researchers using different methods.

9292. Studies of some exploding wire light sources, E. C. Cassidy

and S. Abramowitz, ./. Soc. Motion Picture Television Eng.

75, No. 8, 735-737 (Aug. 1966).

Key words: Aluminum; AIH; AlO; atomic spectra;

electrical discharges; exploding wires; light sources; timeresolved spectroscopy; titanium; TiO.

Continuous and time-resolved measurements of the spectral

distribution of light emitted by various exploding wire systems

have been obtained by use of a high-speed drum camera and a

rotating shutter, respectively. Results from experiments with

several systems show the effects of environment, pressure, energy, and wire material on the spectrum. Various intermediate

species, produced by the explosion, are determined

spectroscopically.

9293. Interference in the photoionization of molecules, H. D. Cohen and U. Fano, Phys. Rev. ISO, No. 1, 30-33 (Oct. 7, 1966).

Key words: Diatomic molecule; interference; photoionization; ultraviolet. Atoms of a molecule exposed to far-ultraviolet light may be

treated approximately as separate sources of photoelectrons.

Interference from these sources modulates the spectrum of

photoabsorption in accordance with Samson's observations on N2 and O2. A Born approximation calculation for H2+ displays

details of this effect.

9294. Vibrational spectrum of CINF2, J. J. Comeford, J. Chem.

f/!V*.45,No. 9,3463-3465 (Nov. 1, 1966).

Key words: Chlorodifluoramine; infrared spectra; matrixisolation; spectra; vibrational assignment: vibrational fundamentals.

The infrared spectrum of chlorodifluoramine has been

examined for the region of the fundamentals in both the gas- phase and in an argon matrix at 20 °K. The previously

unassigned fundamental, v^, has been observed, completing the

vibrational assignment.

9295. Classification of the Y,*(1765) and Yo*(I520) resonances in the 1 134 representation of SU(6), J. J. Coyne, S. Meshkov, and

G. B. Yodh, Phys. Rev. Letters 17, No. 12, 666-668 (Sept. 19,

1966).

Key words: Baryon resonances; classification; decay

widths; higher symmetry; SU(3); SU(6)ii

The Yi*(1765) 5/2" resonance exhibits ratios of meson-baryon

(8x8) decay widths to meson-baryon resonance (8 x 10) decay

widths such as to indicate that it can be classified in the 1134

product representation of SU(6). A comparison of the decay

70
modes of the ¥,,*(! 520) with those of the Y|*(1765) shows that

it, too, may be classified in the 1 1 34.

9296. Static theory of the giant quadrupole resonance in deformed

nuclei, M. Danos, W. Greiner, and B. C. Kohr, Phys. Rev. 151,

No. 3, 761-772 (Nov. 18, 1966).

Key words: Deformed nuclei; giant resonance; nuclear

hydrodynamics; octupole deformation; photon absorption;

quadrupole resonance. The modes and frequencies of the giant quadrupole resonance

of heavy deformed nuclei have been calculated. The quadrupole

operator is computed and the absorption cross section is derived.

The quadrupole sum rule is discussed and the relevant oscillator strengths have been evaluated for various orientations of the nucleus. The giant quadrupole resonances have energies

between 20 and 25 MeV. The total absorption cross section is about 20% of the giant dipole absorption cross section. Of

particular interest is the occurrence of the quadrupole mode in a direction of approximately 6 = MAtt from the symmetry axis. This may give information on the details of the nuclear shape.

9297. Electrodynamic vibration standard with a ceramic moving

element, T. Dimoff, J. Acoiist. Soc. Am. 40, No. 3, 671-676

(Sept. 1966).

Key words: Air bearing; ceramic moving element;

electrodynamic shaker; piezoelectric accelerometers;

reciprocity; secondary standard; vibration standard.

This report describes a new rectilinear vibration exciter

specifically developed for accurate calibration of piezoelectric

accelerometers. It is an electrodynamic shaker using a permanent magnet with a ceramic moving element guided by an

air bearing system. The moving element has a simple cross

section and the driving coil is wound directly onto it. Its first axial resonance is near 25,000 Hz. The working range of the shaker extends from 5000 Hz to less than 5 Hz. The moving element includes a means of mounting an internal accelerometer which can be used as a secondary standard.

Alternatively, the moving element - accelerometer assembly can

be calibrated by a reciprocity method and used as an absolute

standard. The results of measurements of transverse motion and

harmonic distortion are presented as well as an example of

pickup calibration.

9298. A scattering chamber for use with cooled large area lithium- compensated silicon radiation detectors, W. R. Dodge, J. A. Coleman, and S. R. Domen, Nucl. Instr. Methods 42, No. 2, 181-187 (July 1966).

Key words: Detector telescope; large area detectors; photonuclear physics apparatus; scattering chamber;

semiconductor detectors. A scattering chamber designed to be used with large area lithium-compensated silicon radiation detectors has been

constructed. The chamber has provision for cooling a circular array of detectors to 77 °K to achieve short charge collection times and good resolution. The apparatus was designed to be

used with the NBS 180-MeV synchrotron in photoproton

experiments in the 2 to 35 MeV proton energy interval.

9299. Measurement of the mean energy required to create an

electron-hole pair in silicon between 6 and 77 °K, W. R. Dodge,

S. R. Domen, T. F. Leedy, and D. M. Skopik, Phys. Rev.

Letters 11, No. 12, 653-655 (Sept. 19,1966).

Key words: Energy, required to create an electron-hole pair;

low temperature; recombination; Shockley theory of e; silicon radiation detectors; trapping.

Relative values of the mean energy required to create an

electron-hole pair with -""Bi conversion electrons between 6 and

77 °K have been measured. The data show that e exhibits no first order variation with temperature from 6 to 77 °K. Previous

measurements had yielded values as high as 5.22t.02 eV/

electron-hole pair at 20 °K.

9300. Calculated heats of dilute solid solution among the alkali halides other than cesium salts, T. B. Douglas, J. Chem Ph\s.

45, No. 12,4571-4585 (Dec. 15,1966).

Key words: Alkali halides; heats of solution; ion

substitution; lattice relaxation; polarization energy; shell calculations; solid solutions.

Limiting high-temperature heats (energies) of dilute solid solution are calculated for all 96 cases of one NaCI-type alkali halide (except Cs salts) dissolving in another having a common

ion. The direct-summation shell treatment used is based on a

slightly modified Born-Mayer potential function and on the

polarization energy up to terms square in the ion polarizabilities.

Preliminary general expansion of the energy in positive powers

(up to cubic) of the lattice-relaxation (ion-displacement)

parameters of the first eight shells (98 neighbors) facilitated application to specific cases. In the linear solution for the minimum-potential lattice relaxation, one or two iterations for the first two shells sufficed. The convergence of the energy

expansions and the sensitivity of the calculated energies to arbitrary variations in the semi-empirical parameters were

extensively investigated. Comparison is made with calorimetric heats of solution in 16 cases, the agreement (averaging ±10

percent) lying within the experimental and computative errors.

9301. Status of light-element heat-capacity calorimetry at the National Bureau of Standards: A review of the high-temperature

thermodynamics of the BeO-HoO system, T. B. Douglas, Proc. 4th Meeting Interagency Chemical Rocket Propulsion Group,

Working Group on Thermochemistry, Kennedy Space Ftit^ht Center, Florida. Mar. 16-17, 1966, 1, No. 108,'27 (Chemistry

Propulsion Information Agency, Silver Spring, Md., June

1966).

Key words: Beryllium oxide; calorimetry; chemical

propulsion; equilibrium; estimates; thermodynamics.

Heat-capacity calorimetry recently completed and in progress

at the National Bureau of Standards is reviewed briefly. After a

critical review of the thermodynamic properties of the BeO-H^O

system, it is concluded that the product of the reaction between

BeO(c) and H,0(g) below 1850 °K is probably largely

Be(OH)j(g), but that higher hydrates may be sufficiently stable

to hold considerable amounts of BeO in the gas phase at much

higher temperatures.

9302. Erratum: Statistical model for the beta zirconium hydrides, T. B. Douglas, J. Chem. PMi. 45, No. 3, 1080 (Aug. 1.1 966).

Key words: Beta zirconium hydrides; statistical model;

zirconium hydrides.

An inadvertent error in sign is corrected in an equation in an

article of the author's published earlier in the Journal of

Chemical Physics. Only the correct equation, it is added, was

used in the computations in the article.

9303. Survey of infrared measurement techniques and

computational methods in radiant heat transfer, S. T. Dunn, J. C. Richmond, and J. F. Parmer, 7. Spacecraft Rockets 3, No.

7,961-975 (July 1966).

Key words: Computational methods; emissivity; emittance

measurements; radiant heat transfer; reflectance measurements; thermal radiation.

71
This paper is an analysis of 133 replies to a questionnaire sent

to all known workers in the field of thermal radiation property

measurements and radiant heat transfer computations. The

questions were designed to obtain information on the current

state of the art in these fields. In addition, the authors have

supplemented the information obtained from the questionnaire to give a broad over all picture of the current status and future needs in each area covered. A brief summary of Russian

literature in the field of thermal radiation property measurements

is also included.

9304. Unassigned.

9305. A method for calibrating volt boxes, with analysis of volt-box

self-heating characteristics, R. F. Dziuba and T. M. Souders,

IEEE Intern. Conv.Record,PartlO,p. 17 (Mar. 21-25. 1966).

Key words: Calibration; errors; heating; voltage divider; volt-box. A modification of the Julie ratiometric method for calibrating

volt boxes has been under study at NBS to evaluate its performance as a useful calibration technique. The modification

features speed of operation, high accuracy and rated voltage

measurements. Evaluation of the method accelerated an

investigation of self-heating errors of volt boxes that was in progress. The results of this study together with an analysis of

self-heating curves are included.

9306. Additional thoughts on precision calibration of accelerometers, S. Edelman, Test Engineering and

Management XVI, No. 5, p. 17 (Nov. 1966).

Key words: Accelerometer; calibration; comparison

calibration; frequency range; shaker: vibration.

This consists of a number of comments on an article by W. P. Kistler. It shows why reliable calibration of vibration measuring

instruments requires careful measurements over the entire frequency range of interest. 9307. Anniversaries in 1966-67 of interest to statisticians Part I: Introduction and summary, C. Eisenhart,/4w. Stat. 21, No. 2, 32-34 (Apr. 1967).

Key words: Anniversaries; statisticians, 1966, 1967.

Brief descriptions, with minimal documentation, of twenty-six

anniversaries in 1966 and 1967 of potential interest to

statisticians. 9308. A study of the angular and energy distributions of radiation

at small distances from a point source of gamma rays or

neutrons, C. Eisenhauer, Nuci. Sci. Eng. 27, No. 2, 240-251

(Feb. 1967).

Key words: Air-scatter; angular distribution; energy

spectrum; gamma rays; neutrons; point source; shielding;

single scatter. The theoretical expression for the singly scattered angular and

energy flux of radiation from a point source is studied in the limit of very small source-detector separation distances, (fji„r<^\). It

is shown that both the angular and energy distributions are

related in a simple way to the scattering kernel. Examples are given for gamma and neutron point sources in air. The

applicability of the distributions at separation distances of the order of a mean free path (iJL„r = 1 ) is discussed.

9309. Effects of errors in the chemical literature on the compilation of critically evaluated data, W. H. Evans, 7. Chern.

Dof.6,No.3, 135-136 (Aug. 1966).

Key words: Chemical literature; critical data; data

evaluation; errors. The various types of errors in data presented in the chemical

literature and their effects on the critical evolution of the data are

discussed. The relatively unsatisfactory state of errata is mentioned from the point of bringing the correction and the

original publication together.

9310. Some approximations to the Planck function in the intermediate region with applications in optical pyrometry, D.

E. Erminy,/tpp/. Opt. 6, No. 1, 107-1 17 (Jan. 1967).

Key words: Brightness temperature; color temperature;

effective wavelength; infrared and far infrared optical

pyrometry; Planck equation; Rayleigh-Jeans equation;

spectral radiance; Wien equation.

For many applications, a simple approximate equation for blackbody radiation can be more useful than is the Planck

blackbody equation. An intermediate region exists where both

the Rayleigh-Jeans equation and the Wien equation for blackbody radiation are inaccurate approximations to the Planck

equation. Several approximate equations of simple

mathematical form have been obtained which are more accurate

in this intermediate region. These equations are applied to optical pyrometry to obtain formulae for brightness temperature

and color temperature that can be used in the intermediate

region.

9311. Radiation absorption between the ultraviolet and x-ray bands, U. Fano, Science 153, No. 3735, 522-525 (July 29,

1966).

Key words: Absorption; radiation; spectroscopy;

ultraviolet; x-rays. A brief report is presented concerning the recent initial exploration of photoabsorpuon in a previously unmapped

portion of the spectrum.

9312. Approximate normal emissivity spectra in the infrared at elevated temperatures of single-crystal and polycrystalline

calcium fluoride, W. B. Fussell and J. C. Geist, Appl. Opt. 6, No. 1, 119-124 (Jan. 1967).

Key words: Calcium fluoride; elevated-temperature

emissivity: infrared absorption coefficients; infrared emissivity; polycrystalline CaF2; single-crystal CaF>.

A single-beam infrared spectroradiometric system h s been

used to measure the normal spectral emissivity of specimens of

single-crystal and polycrystalline calcium fluoride in the infrared

at elevated temperatures. The wavelength range was 2 to 12 microns and data were taken at sample temperatures of 500 and

600 °C. Room temperature data on the index of refraction of

single-crystal calcium fluoride, and its rate of change with

temperature, were extrapolated to 500 and 600 °C, and the normal spectral reflectivities were computed from the extrapolated indices at these temperatures. The computed

reflectivities were then used to extract normal spectral

absorption coefficients from the emissivity data. It was possible

to compute absorption coefficients with reasonable accuracy at wavelengths of 6, 8, and 10 microns; the smallest estimated error was about 2% at 8 microns. The absorption coefficients increased markedly with temperature at these three wavelengths.

The absorption coefficients of the polycrystalline material were

consistently higher than the corresponding values for the singlecrystal calcium fluoride. It was found that the spectral

absorption coefficients at 8 and 10 microns varied approximately

as the 2.1 and 1.6 power of the absolute temperature,

respectively, between room temperature and 600 °C. These

exponents lie within the range predicted by theory.

9313. Definition of temperature in the kinetic theory of dense

gases, L. S. Garcia-Colin and M. S. Green, Phys. Rev. 150,

No. 1, 153-158 (Oct, 7, 1966).

72
Key words: Bulk viscosity: macroscopic equations of

motion: macroscopic variable: non-equilibrium kinetic energy: temperature: total energy. The question of the appropriate definition of temperature in the kinetic theory of dense gases is discussed. An apparent

contradiction in the value of the bulk viscosity between two

methods of making the transition from the kinetic to the hydrodynamic stage is resolved. It is shown that the definitions of temperature through the kinetic energy and through the total energy are equivalent. The general question of the appropriate

choice of macroscopic variables in non-equilibrium statistical mechanics is discussed.

93 1 4. New method and problems in combinatorial optimization, A. J. Goldman, Washington Oper. Res. Council Newsletter 5, No. 8,4-8 (Apr. 1966).

Key words: Algorithms; combinatorics; mathemafics;

matroids; networks; operations research: optimization.

This paper describes recent progress at the National Bureau of

Standards in the field of combinatorial optimization.

9315. A new contribution — NBS and engineering standards, G. S. Gordon, Safely Standards X\l,No. 1, 3-4 (Jan.-Feb. 1967).

Key words: Engineering standards; international and

national standards activities; OESLA; standards-making

bodies.

The need for greater participation by NBS in helping to strengthen the nation's standards program was called for in the recent report of the LaQue Committee. The Office of

Engineering Standards Liaison and Analysis (OESLA) has been

established as the focal point at NBS for making available the

technical resources of Bureau personnel to assist the federal,

state and local governments, private engineering standardsmaking bodies and manufacturers in developing adequate

representation of industrial, consumer and general public

interests in national and international standards activities.

9316. Air bath thermostat for use with absorption

spectrophotometer, J. H. Gould, Rev. Sci. Instr. 37, No. 9, 1229-1231 (Sept. 1966).

Key words: Spectrophotometry; thermostat; ultravioletvisible; -150 to +60 °C. An automatically controlled absorption cell thermostat with a

useful range of from — 150 to +60 °C is described and has been

successfully used with a commercial spectrophotometer. This

apparatus accepts ordinary cylindrical absorption cells to 5 cm in length.

9317. Note on normal subgroups of the modular group, L. Greenberg, Proc. Am. Math. Soc. 17, No. 5, 1 195-1 198 (Oct.

1966).

Key words: Factor set: group extension; level; modular

group; parabolic class number: quotient surface; split

extension.

Let N be a normal subgroup of the modular group F, of index /n and parabolic class number t. It is shown that /x ^ 6t^. It follows

immediately from this that there are only a finite number of

normal subgroups with given parabolic class number. This is in sharp contrast to the case of non-normal subgroups. For it is known that for any integer t^l, there are infinitely many

subgroups of finite index with / parabolic classes. It is also shown that if p is a prime such that p=— 1 (mod 3), then there are no normal subgroups with p parabolic classes.

9318. A new near-zone electric field-strength meter, F. M.

Greene, (Proc. 8th IEEE Symp., Electromagnetic

Compatibility, San Francisco, Calif., July 11-13, 1966),

Symposium Digest, New Ideas for Electromagnetic

Compatibility, 1966.

Key words: Device; field; hazards; line; meter; telemetry.

The National Bureau of Standards has recently completed the development of prototype instrumentation for measuring the

electric-field components of complex, high-level, near-zone

electromagnetic fields from 0.1 to 1000 volts per meter, at frequencies from 1 50 kHz to 30 MHz with a present uncertainty

of less than ±2 dB. The successful design of the NBS meters is based on the use of a novel form of telemetry, employing a

completely non-metallic electrical transmission line, which

apparently has not been fully exploited heretofore. This avoids

the perturbing effects on the field being measured, usually

caused by field-strength meters employing metallic RF

transmission lines.

9319. Baffled piston radiator: expansion of potential in far, paraxial field, M. Greenspan, J. Acoust. Soc. Am. 40, No. 1, 251-252 (July 1966).

Key words: Acoustics; diffraction, potential; piston

radiator; potential diffraction: radiator, piston; sound.

The potential of a circular source, having radially symmetrical

but otherwise arbitrary distribution, v(r<,) of velocity over its face, is expanded as (/)=z"'e"''''^(ao+aia~'+. . .) [Cylindrical

coordinates (r,6,z); center of source at r=z=0]. We find a to depend only on the total volume velocity at the source. If v(r„) is known, all a„ can be calculated; if it is unknown, limits on a„ can

be set.

9320. Growth of calcite crystals, P. M. Gruzensky, (Proc. Intern. Conf. Crystal Growth, Boston, Mass., June 20-24, 1966),

Crystal Growth, a Suppl. to J. Phys. Chem. Solids D3, 365-

367 (Pergamon Press Inc., New York, N.Y., 1967).

Key words: Calcite; crystal growth; crystals; vapor phase

diffusion. Renewed interest in the growth of synthetic calcite crystals

has been stimulated by the possible use of calcite as a host

crystal for maser materials. A crystal growth method is described in which (NHj)2C03, by vapor phase diffusion, is slowly brought into contact with a solution containing 2 wt

percent CaCls and 20 wt percent NH4CI. Transparent rhombs

are obtained with edge dimensions of 3-4 mm, which are verified to be calcite by x-ray diffracfion measurements.

9321. A modified Monte-Carlo quadrature, S. Haber, Math.

Compt. 20, No. 95. 361-368 (July 1966).

Key words: Analysis: integration: mathematics; MonteCarlo; multiple integration; numerical analysis; numerical

integration; quadrature.

A modification of Simple Monte-Carlo quadrature is proposed, which uses very simple forms of stratified sampling

and of the "method of antithetic variates." The new procedure is fully automatic, requiring no preliminary analysis of the

integrand, and converges somewhat faster than Simple MonteCarlo. Results of experimental calculations are presented.

9322. Abstraction of hydrogen atoms from i$obutane-d9 by

methylene, M. L. Halberstadt and J. R. McNesby, J. Chem.

Phys.45,'No.5, 1666-1669 (Sept. 1, 1966).

Key words: Abstraction; isobutane-d9; ketene; methylene;

photolysis.

The photolysis of ketene at 3130 A in the presence of

isobutane-dc) was carried out at 320 °C in order to determine the mechanism of methyl radical formation. The two possibilities

considered are:

313-589 0-69—

73
Mechanism I — insertion followed by internal relaxation and

finally expulsion of a methyl radical. Mechanism II — direct abstraction. Mechanism II was found to be the only detectable mode of

methyl radical formation. The effect of pressure on the isotopic

methane distribution was studied and an attempt is made to explain the effect in terms of a DeMore-Benson process.

9323. Two quantum photoionization of Cs and I , J. L. Hall, /. Quantum Electron QE-2, No. 4, xxi (April 1966); IEEE J. Quantum Election QE-2, No. 9, 361-363 (Sept. 1966).

Key words: Atomic calculations; nonlinear optical

phenomenon; two-photon ionization.

Brief review of a recent experiment which measured the photodetachment probability for I^ ions due to simultaneous

absorption of two ruby quanta.

9324. Unassigned.

9325. A nonmagnetic laboratory for the National Bureau of Standards, F. K. Harris, IEEE Spectrum 3, No. 11, 85-87

(Nov. 1966).

Key words: Absolute ampere determination; calculable inductor; current balance; national electrical units; nonmagnetic facility; Pellat dynamometer; proton

precession frequency.

Plans are discussed for a nonmagnetic laboratory to be built on

the Gaithersburg campus of the National Bureau of Standards

for absolute electrical measurements and other purposes. The

operation of the NBS current balances and the proton

gyromagnetic ratio apparatus is briefly reviewed, and a short

history of the national electrical units since the creation of the Bureau is included.

9326. Spectral radiance of a low current graphite arc, A. T. Hattenburg,/4pp/. Opt. 6, No. 1, 95-100 (Jan. 1967).

Key words; Arc; blackbody; graphite; spectral radiance;

spectroradiometer; temperature.

The spectral radiance of the anode of a low-current graphite

arc has been determined throughout most of the 850 to 210 nm

region, utilizing a recently developed high-accuracy

spectroradiometer. The estimated standard deviation

uncertainty varies from about 1 .5% at the longer wavelengths to about 5% at the shorter. Results are given at twenty wavelength

points in the region, and also as a continuous function of

wavelength throughout most of the region, excluding some areas of high molecular band radiation originating in the arc stream.

9327. The "volt standard" moves to Gaithersburg, Maryland, W.

J. Hamer.y. Wash. Acad. Sci.5(>, 101-108 (May 1966).

Key words: Electromotive force; standard cell facilities; standard cell transfer; standard cells; volt standard. A description is given of the transfer of the nation's "volt standard" from its present location in Washington, D.C., to its new location on a site near Gaithersburg, Md. Factors involved

in transfer are discussed and a brief description is given of new

standard cell facilities in the new laboratory at Gaithersburg.

9328. Mass-spectrometric study of the rate of the reaction CO-hOH, J. T. Herron. y. Chem. Phys. 45, No. 5, 1854-1855 (Sept. 1, 1966).

Key words; Activation-energy; atom-transfer reaction; carbon dioxide, carbon monoxide; gas phase; hydrogen

atom; hydroxyl-radical; rate constant. The rate constant of the reaction C0-I-0H-^C02+H has been

directly measured at 300 °K to be 5.4±2.0 (estimated

uncertainty) x lO'" cm^ mole i see"'. This value combined with

published high temperature rate data leads to k=9.2 x 10"

exp (-1000/RT).

9329. Mass spectrometric study of the rates of the reactions of nitrogen atoms with olefins, J. T. Herron, J. Phys. Chem. 70,

No. 9, 2803-2807 (Sept. 1966).

Key words; Atoms; mass; mechanisms; nitrogen; olefins; rates; spectrometry.

A mass spectrometric study has been made of the rates of the reactions of nitrogen atoms with a series of olefins. At 340 °K

the rates are: C2H4, k~1.0±0.5; CaH^, k=1.9±0.6; CjHs-l,

k=2.0±0.4; t-C4H«-2; k=1.7±0.4; iso-C^H^. k=4.2±I.O;

C,(CH3)4, k=2.4±0.6; C4H«-1.3. k=3.5±1.0; all x 10"> cm'' mol"' sec"'.

9330. The forbidden — X'2+ absorption bands of carbon

monoxide, G. Herzberg, J. D. Simmons, A. M. Bass, and S. G.

Tilford, Can. J. Phys. 44, 3039-3045 (1966).

Key words: Absorption; carbon monoxide; forbidden

transition; high resolution; spectrum; vacuum ultraviolet. The forbidden I '2 — X '2+ transition of CO has been observed

at high resolution in the vacuum ultraviolet region. Eight bands

have been analyzed to determine rotational and vibrational constants for the VI state. The bands consist of a single Qbranch v/hich gains intensity through a rotational mixing of the I'2^ and A'll states. The local perturbations between the I and

A states are summarized and discussed. Also an apparent

"vibrational" perturbation in the v=4 and 5 energy levels of the I state is described. Indirect evidence suggests the perturbing

state is a ^If.

933 1 . An ultrasonic pressure gage, P. L. M. Heydemann, (Proc.

ASME Winter Meeting, New York, N.Y., Nov. 27-Dec. 1, \966), Am. Soc. Mech. Eng. Publ. No. 66-WA/PT-5 (1967);/.

Basic Eng. 89, No. 3, 551-553 (Sept. 1967).

Key words; Delay line; frequency stability; gage; high

pressure; self-excited pulse repetition; temperature

compensation; ultrasonics; velocity of sound.

The transit time of short ultrasonic pulses in solid rods is used

to measure pressures throughout the fluid range. Self-excited

regenerating circuits are used. Measurements to 3500 bar with an uncertainty of .3 bar and to 20 kbar with an uncertainty of 2 bar are reported. Further improvements, temperature

compensation and stability are discussed.

9332. Higher symmetries and the 2+ mesons, D. Horn, J. J. Coyne, S. Meshkov, and J. C. Carter, Phys. Rev. 147, No. 4, 980-984 (July 29, 1966).

Key words: Higher symmetry scheme; k quark content; nonet of 2"+ mesons; Schwinger mass formula; SU(6)ir; 405

representation.

The two-body decays of the recently completed nonet of

jpr=2++ mesons offer the tempting possibility of delineating in which bigger multiplet of some particular higher symmetry

scheme they might be embedded. In this paper, these decays are calculated according to SU(6)ir. In such an approach the mesons may be accommodated in either the 189 or 405 representations

of SLJ(6). We show that using only the two-body decay modes of

the nonet of spin 2 mesons, one cannot in principle determine

whether thay belong in a 189 or 405 representation. This

impasse may be broken by ordering states by their A. quark

content in which case 189 is eliminated from consideration. In

the process, we find that the Schwinger mass formula, which is not satisfied by the experimental masses, should not properly be

used for the 405, but should be replaced by a similar relation which is extremely well satisfied.

74
9333. A high directivity, broadband coaxial coupler, P. A. Hudson, IEEE Trans. Microwave Theory Tech. MTT-14, No.

6, 293-294 (June 1966).

Key words: Coaxial; coupler; directional; reflectometer; RF power.

A new 4-port coaxial directional coupler having high

directivity (>50 dB) over relatively broad frequency bands has

been designed and constructed. The coupler is the X/4 type cut

for 1 150 MHz and is useful in the frequency bands 700 to 1500

MHz and 3000 to 4000 MHz. Precision connectors (14 mm) are used on all ports and the VSWR of both primary and secondary

lines is less than 1.01. A brief description is given of the performance characteristics of the coupler when used as the equivalent of a matched

generator in intercomparing RF power meters.

9334. Cerous magnesium nitrate: a magnetic temperature scale 0.002-2 °K, R. P. Hudson and R. S. Kaeser, Physics 3, No. 2, 95-113 (Feb. 1967).

Key words: Cerous magnesium nitrate; low temperature

scale; magnetic thermometer.

Isentropic demagnetizations from known starting conditions

yielded a determination of the entropy-magnetic susceptibility, or S-x, relation for single-crystal spheroids of the paramagnetic

salt cerous magnesium nitrate, CMN. Enthalpy differences, AQ,

between the low temperature end-points thus reached and a

(arbitrary) reference temperature near 1 °K [determined by

gamma ray heating] yielded a corresponding Q-S curve, whence

one obtained S-T and x-T, T being the thermodynamic

temperature. The salt exhibits a broad maximum in x centered on S/R=0.32, for which region the absolute temperature is determined to be 0.001.-, °K. Our results disagree significantly

with those of other workers (even S-x- which is not subject to large experimental error) save for the observation that CMN

obeys the Curie law at least down to 0.006 °K. At high temperatures (T>0.006 °K), all specimens show a heat capacity C/R=bT"^ with b=5.76 x 10"^. Superimposed upon

this is a small "anomaly" first appearing at approximately 0.015

°K and reaching a maximum near 0.025 °K. The attribution of

such an effect to small concentrations of magnetic impurities cannot be reconciled with the results of chemical analysis. Other

evidence, moreover, supports the idea of a nonmagnetic origin for this anomaly.

9335. Production and reaction of atomic fluorine in solids. Vibrational and electronic spectra of the free radical HNF, M.

E. Jacox and D. E. Milligan, J. Chem. Pliys. 46, No. 1, 184- 191 (Jan. 1, 1967).

Key words: F atom reactions; force constants; HNF;

HNFa; infrared spectrum; matrix isolation; NF; NF2;

thermodynamic properties; visible-ultraviolet spectrum.

The species H'^NF, H'^NF, and D'^NF have been produced

in an argon matrix at 14 °K by the reaction of photolytically

produced atomic fluorine with NH. Sufficient concentrations of

these species have been obtained for direct detection of two

vibrational fundamentals, appearing at 1000 and 1432 cm"' for H^NF, as well as of an electronic transition between 3900 and

5000 A involving a progression in the upper state bending

frequency. Force constants and thermodynamic properties have

been derived for HNF. Other species observed in these experiments include NF, NF2, and HNF2. Evidence is presented indicating that the hydrogen atom can be abstracted

from HN.) by atomic fluorine.

9336. Physiological optics at the National Bureau of Standards, D.

B. Judd, /Ip/?/. Opt. 6, No. 1 , 1 3-26 (Jan. 1 967).

Key words: Color; gloss; light; perception of color; photometry; physiological optics; psychophysics; scaling of

color.

Published work in physiological optics at the National Bureau

of Standards is summarized under the headings; evaluation of

light-dark patterns, light measurement, color measurement, color

differences, and color perception. The bearing of this work on

standard methods of the American Society of Testing and

Materials, of the Illuminating Engineering Society, and of the American Standards Association, and on recommendations of

the International Commission on Illumination is indicated. The

purposes and methods of current work are briefly described.

9337. Vacuum ultraviolet spectrum of neutral silicon, V. Kaufman, L. J. Radziemski, Jr., and K. L. Andrew, J. Opt.

Soc. /4 w. 56, No. 7, 9 11 -9 1 5 (July 1 966).

Key words: Atomic spectrum of silicon; carbon spectra; electrodeless discharge; germanium spectra; nitrogen

spectra; silicon i; silicon spectra; vacuum ultraviolet standards.

Measurements have been made on about 200 Si i lines in the region 1548 to 2100 A excited by a low pressure source,

resulting in wavelength values with uncertainties, in general, of

less than 0.0015 A. Some of the vacuum ultraviolet wavelengths

had been calculated by Radziemski and Andrew (J. Opt. Soc. Am. 55, 474 (1965), and a comparison of 75 measured and

calculated values shows that they agree on the average to 0.0007

A. A plot of the differences shows the scatter to be much greater

than any systematic difference. This indicates that the calculated wavelengths are compatible with the set of Ge i lines used as standards in measuring the Si i lines. The new data have

also led to an extension and slight revision of the odd level analysis. New measurements on other Ge i lines and strong lines

in the spectra of Ge 11, Si 11, N i, and C i are also reported. These

lines should be useful as auxiliary standards in this spectral

region. All of the spectrograms were taken in the first order of a 10.7-meter Eagle vacuum spectrograph with a reciprocal

dispersion of 0.78 A/mm. The source was an electrodeless discharge lamp containing SiClj and GeCU vapor with argon or helium carrier gas at a total pressure no greater than 0.5 torr.

9338. Measurement and calculation of Cu 11, Ge 11, Si 11, and C 1 vacuum-ultraviolet lines, V. Kaufman and J. F. Ward, J. Opt.

5oc./lw.56, No. 11. 1591-1597 (Nov. 1966).

Key words: Carbon; copper; germanium; Ritz; silicon; spectrum; standards; ultraviolet; vacuum; wavelengths.

The discharge in a water-cooled copper hollow-cathode

containing germanium and silicon was photographed with the NBS 10.6-meter Eagle vacuum spectrograph to investigate a

portion of the vacuum ultraviolet spectrum of singly ionized

copper in first, second, and third orders. 32 of the 33 Cu n lines of the 4p-6s transition for which Ritz calculations have been

made were investigated as to their suitability as standards. 104

other lines of Cu 11 in the interval 861-1623 A were observed and

measured in the second and/or third orders with estimated

wavelength uncertainties of 0.0006 A. Included in this group are two previously unobserved lines of the 4p-6s transition, four

members of the calculable 4s-5p transition, and the three ground

state transitions (a iSo-4p 'P,, ^P,, ^Di). This latter group of three

lines allows the calculation of shorter wavelength lines. Some vacuum ultraviolet multiplets of C i. Si 11, and Ge 11 in the wavelength range 1492-1602 A, were also measured in second order. These lead to an extension, modification or confirmation of the present lists of calculated wavelengths of

these spectra. A precise measurement of the Lyman Beta line of

hydrogen in third order is an added confirmation of the presence

of the Lamb shift of the 1 ^S state of hydrogen.

75
9339. Newly measured and calculated wavelengths in the vacuum

ultraviolet spectrum of neutral nitrogen, V. Kaufman and J. F. Ward.^pp/. Opt. 6, No. 1, 43-46 (Jan. 1967).

Key words: Atomic spectrum; calculated wavelengths;

nitrogen; spectrum; vacuum ultraviolet. The NBS 10.7-meter vacuum spectrograph was used in second order to obtain precision measurements on seven N i lines at 1492/4 (2p"D°-2p23s ^P) and 1742/5 A (2p'' 2P°-2p23s

^P). Combining these values with other available information on

the energy levels of the neutral nitrogen atom, 78 calculated wavelengths of N i from 908 to 1745 A are given with

uncertainties of ±0.001 A or better.

9340. Nitrogen on rhenium observed with the field emission

microscope, R. Klein and J. W. Little, Surface Sci. 6, No. 2, 193-207 (Feb. 1967).

Key words: Chemisorption; field emission; nitrogen;

rhenium.

The adsorption of nitrogen on rhenium was observed with a

field emission microscope. Nitrogen decreases the work

function of rhenium but also decreases the pre-exponential term

of the Fowler-Nordheim expression. The result is a small

decrease in emission with nitrogen adsorption. Surface

migration could not be directly observed because desorption

precedes it. There are two chemisorbed binding states associated with nitrogen on rhenium. The first is little stronger

than physisorbed but accounts for most of the nitrogen in a

saturated layer at 50 °K. The second is inferred from small

pattern changes above 750 °K. The weakly bound state probably

consists of a number of states with a distribution of desorption

energies.

9341. A zero-range treatment of the three-body

photodisintegration cross section of and ^He,J. M. Knight, J.

S. O'Connell, and F. Prats, Phys. Letters 22, No. 3, 322-325

(Aug. 15, 1966).

Key words: Cross section; differential cross section; ^H;

'He; photodisintegration; zero-range.

Zero-range theory is used to construct bound and continuum

state wave functions. The total and differential electric dipole

photodisintegration cross sections for three-body breakup of ^He

and 'H are calculated using these wave functions.

9342. New standard for the calibration of microphones, W.

Koidan, Mag.Std. 37, No. 5, 141-144 (May 1966).

Key words: Calibration; microphones; standard.

This article discusses the background, contents and use of a new American Standard, Calibration of Microphones. Sl.lO1966, published by the American Standards Association,

Incorporated.

9343. Lack of uniqueness in the International Practical Temperature Scale above the gold point, H. J. Kostkowski,

MetrologiaX'i^o. 1,28-29 (Jan. 1967).

Key words: Infrared pyrometer; International Practical Temperature Scale; optical pyrometer; radiation

thermometry; standards; temperature.

The International Practical Temperature Scale (IPTS) above

the gold point is shown to vary with wavelength. Although the extent of this variation is barely significant relative to the present

uncertainty of realizing the scale, the IPTS should be unique;

and to achieve this a wavelength must be specified in the

definition.

9344. A new radiometric equation and its application, H. J. Kostkowski, /I p/?/. Op/. 5, No. 12, 1559 (Dec. 1966).

Key words: Blackbodies; non-blackbody emission; optical radiation; radiometry; sources; spectral radiance.

A simple equation has been found which gives, at any

wavelength, the ratio of the spectral radiances of two arbitrary sources when their spectral radiances at some particular

wavelength are equal. The main advantages of the equation are

its simplicity and the fact that it does not involve temperature

explicitly; a limitation is that Wien's radiation equation is required. The new equation is derived and various applications

are given.

9345. Optical constants of germanium, R. E. LaVilla and H.

Mendlowitz,/lpp/. Opt. 6, No. 1, 61-68 (Jan. 1967).

Key words: Characteristic electron energy loss; far

ultraviolet; germanium; Kronig- Kramers dispersion

relations; optical properties; sum rules. We have attempted to assess the disagreement of various

investigators on the optical properties of germanium in the far uv. The analysis subjected the reported data, out to about 25 eV

to the following tests: 1. An internal consistency check when

possible by applying the Kronig-Kramers dispersion relations to the optical constants. 2. An evaluation of the optical oscillator strength distribution for the spectrum under study. 3. Correlation of the values of Im 1/e* from the optical data with

the characteristic electron energy loss spectrum for the material.

4. Evaluation of the oscillator strength sum for the electron energy loss distribution. A set of optical constants derived from

the characteristic electron energy loss data are presented and

discussed. Also, an estimate of source of the errors incurred in the application of the Kronig-Kramers dispersion relations are given and discussed in terms of optical data.

9346. Radiance temperature at 6500 A of the graphite arc, R. D. Lee and E. Lewis,ylpp/. Opf. 5, No. 1 1, 1858 (Nov. 1966).

Key words: Graphite arc; pyrometry; standard;

temperature.

The radiance temperatures of over twenty positive electrodes

in a graphite arc were measured with the NBS photoelectric

pyrometer and were found to range from 3786 °K to 3808 °K. The radiance temperatures were measured to an accuracy of 2 deg K (standard deviation uncertainty) with a pyrometer

sensitivity of 0.2 deg K.

9347. The NBS photoelectric pyrometer and its use in realizing the International Practical Temperature Scale above 1063 °C, R. D.

Lee, Metrologia 2, No. 4, 150-162 (Oct. 1966).

Key words: Blackbody; International Practical Temperature Scale; optical; photoelectric pyrometer;

radiance sources; standards; temperature.

A photoelectric pyrometer has been developed with which the

International Practical Temperature Scale (IPTS) above the gold

point, 1063 °C, is realized about 5 times more accurately than the prevalently used disappearing filament visual pyrometer.

Estimated uncertainties, at a 95% confidence level, of realizing the IPTS with the photoelectric instrument are 0.12 deg C at 1063 °C, 0.24 deg C at 1256 °C, and 3 deg C at 3525 °C. The

design, evaluation, and calibration to realize the IPTS are discussed.

|

9348. Real two-dimensional representations of the free product of two finite cyclic groups, J. Lehner and M. Newman, Proc. Camb. Phil. Soc. 62, 135-141 (1966).

Key words: Free products: groups; representations.

~A11 real discrete representations of the free product of two

finite cyclic groups by a group of linear fractional transformations are determined.

76
9349. Coriolis zeta constants and force field for osmium

tetraoxide, 1. W. Levin and S. Abramowitz, Inorg. Chem. 5, 2024-2026(1966).

Key words: Corioiis constant; force field; infrared; osmium

tetraoxide; vibration-rotation. The infrared spectrum of osmium tetraoxide in the region of its infrared active fundamental absorption bands. Coriolis zeta constants have been determined from the unresolved vibration- rotation band contours. These constants have then been utilized as constraints in the determination of the general force field for osmium tetraoxide.

9350. Government, industry and engineering. NBS in a new

setting, S. Lichtenstein, Automotive Ind. 135, No. 10, 1 19-124

(Nov. 15, 1966).

Key words: Basic and applied research; calibration; instrumentation; interchangeability of parts; mass

production; standardization; testing.

Sixty-five years of industrial progress — exemplified by the

rapid development of the modern, mass-production automotive

industry — are discussed in relation to the National Bureau of

Standards' 65-year history as the Bureau prepares dedication

observances for its new facilities in Gaithersburg. Typical NBS

contributions to automotive progress are cited, and they are linked with activities of units devoted to metrology, mechanics,

weights and measures, mandatory standards, organic standards,

materials evaluation, and product standards.

935 1 . The battle against corrosion, S. Lichtenstein, Compressed

Air Mag. 11,^0. 12, 12-13 (Dec. 1966).

Key words: Basic and applied research; economics of

corrosion; industrial design; materials protection; structural

failure.

Corrosion is discussed as a technological and economic

"disease" eating away at metals and materials, depleting natural resources, and causing injury and death where accidents and

explosions result from weakening of structures. Dollar estimates

of costs to the Nation and the Federal Government are given.

Anfi-corrosion work of the National Bureau of Standards'

Institute for Materials Research is described and highlights of a half-century of achievement are noted. Corrosion control is linked to progress in nuclear power, oceanography, water

desalination, military operations, space and supersonic

transport, health, safety and conservation.

9352. Nuclear giant quadrupole resonance, R. Ligensa, W.

Greiner, and M. Danos, Phys. Rev. Letters 16, No. 9, 364-367

(Feb. 28, 1966).

Key words: Absorption; collective model; cross section; deformed nuclei; giant quadrupole resonances; photons.

The description of the giant quadrupole resonance of

deformed nuclei is extended to include the coupling between the

different collective modes. The interaction with the odd particle

is also included. The results are compared with recent experimental photon absorption cross sections.

9353. Current algebras and matrix elements of the axial- vector

current, H. J. Lipkin, H. R. Rubinstein, and S. Meshkov,

Phys. Rev. 148, No. 4, 1405-1407 (Aug. 26, 1966).

Key words: Axial-vector current; chiral; G.4; G*;

representation-mixing; sum-rules; vector current. The assumption that the space integrals of the time

components of the vector and axial-vector currents satisfy the

commutation rules of the Lie Algebra LI (3) x U(3) has led to a number of interesting results. The following experimentally

measurable quantities are calculated directly from the algebra

without writing down the sum rules: G i — the strength of the axial-vector coupling constant in /3-decays; G* — the strength of

the axial-vector transition between the nucleon and the N*(1238), and the d/f ratio for the axial-vector current of the baryon octet. 9354. Determination of the effective force constants between a

substitutional impurity and its nearest neighbors in an alkali halide crystal, R. A. MacDonald, Phys. Rev. 150, No. 2, 597-

602 (Oct. 14, 1966).

Key words: Alkali halide crystal; Born- Mayer potential;

deformation dipole model; effective force constants;

isotopic impurities; local mode frequencies; nearest- neighbor interaction; substitutional impurity; U-centers. The forces between a substitutional impurity and its nearest neighbors in an alkali halide crystal with rocksalt structure are determined in the harmonic approximation. The deformation

dipole model is used for the lattice dynamics of the perfect

crystal. Two independent force constants are involved in the problem which is treated in two ways. First, the two force constants are obtained from the equation of motion for the local mode of vibration using experimental values of the local mode

frequencies due to H~ and D^ impurities in NaC/ and KC/, and

assuming that the force constants are the same for different isotopes of the impurity. This method yields no real solutions

for the force constants for U-centers in KC/. The second

method assumes that the force constants for the impurity (say

H ) are the same as those in an alkali hydride crystal having the same lattice spacing as the alkali halide crystal. A Born- Mayer

interatomic potential is used for this calculation. The first method gives 45% softening of the force constants for U-centers

in NaC/, the second method gives 70% softening. The results are compared with those of previous theories and with

experimental results on the KBr:Li+ system.

9355. Instrumental aspects of synchrotron XUV spectroscopy, R.

P. Madden, D. L. Ederer, and K. Codling, Appl. Opt. 6, No. 1

,

31-38 (Jan. 1967).

Key words: Grazing-incidence; 3-meter; monochromator

alignment; 0.06 A resolution; spectrograph; synchrotron

light.

Electron synchrotrons are becoming increasingly important as sources of extreme uv radiation for physical experiments. The

NBS 180 MeV machine has been utilized for gas absorption

studies over a 4-year period, during which a 3-meter grazing

incidence spectrograph and monochromator have been designed,

constructed, and put into operation. The instruments are extremely stable to vibration and temperature variation, and are operating with a slit limited resolution of the order of 0.06 A. The design principles and features of these instruments are described, and a highly-successful prealignment procedure for grazing-incidence spectrometers is outlined. The effect of the unusual characteristics of this light source on the illumination

and performance of the spectroscopic instruments is discussed.

9356. Possible observation of In"^ nuclear electric hexadecapole

transitions, R. J. Mahler, L. W. James, and W. H. Tantilla,

Phys. Rev. Letters 16, No. 7, 259-261 (Feb. 14, 1966).

Key words: Hexadecapole; induced; nuclear; transition; ultrasonically.

This letter reports the observation of ultrasonically induced

Am^h3, In"'' nuclear spin transition in InAs single crystal.

9357. Nuclear hexadecapole interactions, R. J. Mahler, Phys. Rev. 152, No. 1 , 325-330 (Dec. 2, 1966).

Key words: Angular dependence; hexadecapole;

hexadecapole transitions; phonon interactions; saturation

factor; 4-3m symmetry.

77
The nuclear hexadecapole matrix elements for the static and

the one phonon-nuclear interactions are developed and are evaluated for Am^t3 and Am=±4 nuclear transitions involving a

spin 9/2 nucleus in a crystal with 4-3m symmetry. An

expression for the saturation factor for a general interaction

which gives rise to nuclear spin transitions involving the change

in the z-component of the spin by any amount Am=^ is developed and is used to derive the angular variation of the one- phonon, Am=±3 and Am^t4 nuclear hexadecapole interaction. Finally a method to end the speculation about the observation of

the hexadecapole interaction is presented.

9358. Effects of space radiation on refractive properties of optical

glass, 1. H. Malitson, M. J. Dodge, and M. E. Gonshery, Proc. Annual Conf. Photography, Science and Engineering, San

Francisco, Calif., May 9-13, 1966, p. 75 (1966).

Key words: Optical glasses; radiation effects; refractive index.

A report is given of the effects of gamma and electron

radiations on the refractive properties of certain normal and

cerium-protected optical glasses that may be used for lens components of high-resolution cameras and television systems.

Refractive index changes as large as 2 x 10"" for unprotected

glass and 6 x 10"^ for non-darkening glasses were observed after

irradiation. Data are given showing that radiation-induced index

and dispersion changes can last for periods of weeks and

fluctuate with time. High purity fused silica was found to be

radiation resistant.

9359. Infrared spectra of HCi, DCl, HBr, and DBr in solid rare- gas matrices, D. E. Mann, N. Acquista, and D. White, J. Chem. Phys. 44, No. 9, 3453-3467 (May 1966).

Key words: Hydrogen bromide; hydrogen chloride;

infrared; rare gas matrix; spectrum.

The infrared absorption spectra of HCI. DCl, HBr. and DBr.

trapped in solid rare-gas matrices at liquid hydrogen and liquid

helium temperatures, are reported. In the region of their fundamentals, the spectra of all these diatomic molecules consist

of a number of bands; some which exhibit reversible changes in intensity and line width with temperature and others which are temperature independent.

The temperature dependent features have been identified as

rotation-vibration bands of the matrix isolated diatomic

molecule. The spacings of these bands are appreciably less than

the separations of corresponding bands in the free molecule

spectrum indicating a hindrance to rotation due to lattice- molecule interactions. Two different types of lattice-molecule

couplings are examined in the interpretation of the results.

It is shown that the temperature independent bands, identified as vibrational transitions owe their existence to the presence of

trace nitrogen impurities in the solidified rare-gas matrices, or concentration effects.

9360. A pycnometer for small volumes of liquids, S. Marantz and

G. T. Armstrong, Chem.-Anal. 55, 1 14-115 (Oct. 1966).

Key words: Density; liquids; pycnometer.

The design, calibration, and performance of a small volume

(0.1 cm^) pycnometer is described. The instrument can be used

to measure liquid densities to a 0. 1 percent accuracy.

9361. Excitation and ionization in arc and spark spectroscopic

sources, M. Margoshes, /Ipp/. Specr/T. 21, No. 2,92-99 (1967).

Key words: Arc; Boltzmann equilibrium; excitation;

ionization; line intensity; Saha equilibrium; spark;

spectrochemical analysis; spectroscopic source. A description is given of the mathematical theories which are applicable to the excitation and ionization of atoms in plasmas at

thermal equilibrium. These processes are controlled by the temperature and electron density in the plasma; some methods of

determining these parameters are given. It is shown that, even

with the limited data available, the theories can be applied to practical problems which arise in spectrochemical analysis.

9362. Effect of nuclear alignment on the 14 MeV total neutron

cross section of "^'^Ho, H. Marshak, A. C. B. Richardson, and T. Tamura, Phys. Rev. 150, No. 3, 996-1010 (Oct. 21, 1966).

Key words: Black nucleus model; cryogenic target; coupled-channel calculation; nuclear alignment; nuclear

deformation; optical model; Van de Graaff; 14 MeV

neutrons; '^^Ho. The effect of nuclear alignment on the total cross section of the highly deformed '"'^Ho nucleus has been measured using 14 MeV

neutrons. The aligned '"^Ho target was obtained by cooling a

metal single crystal to 0.33 °K. A finely collimated beam of 14 MeV neutrons was produced by careful collimation of the alpha

particle produced in the 5H(d,n)"He reaction and by detecting it in fast coincidence with its associated neutron. The measured

total cross section is (5.29±0. 10) b. The fractional change in the

total cross section, for our value of nuclear alignment (f2=0.31),

is + (3.52±0.75) %, where the positive sign indicates a larger cross section for nuclei aligned perpendicular to the incident

beam than for randomly oriented nuclei. These results are in excellent agreement with the predictions of the optical model

using an adiabatic coupled-channel calculation. The opticalmodel parameters used are in good agreement with those

obtained from other measurements, and in particular the value of

the deformation parameter /3=+0.30 is the same as that used in our earlier work. It was also found that 14 MeV is not yet a

sufficiently high energy to use the black nucleus model to interpret our results.

9363. X-ray fiber optics, L. Marton,/!^/?/. Phys. Letters 9,^0. 5, 194-195 (Sept. 1, 1966).

Key words: Fiber optics; x rays. The possibility of the creation of fiber optics for x rays is investigated. While the aims in the creation of such fiber optics are similar to those in light optics, the technical means for achieving it are quite different.

9364. A nomogram for determining azimuth and horizontal trace

velocity from tripartite measurements, H. Matheson,

Earthquake NotesXXXWh'No. 1,33-37 (Mar. 1966).

Key words: Nomogram; tripartite nomogram.

The direction normal to a traveling plane wave front and the wave's horizontal trace velocity at the earth's surface, are easily

determined by observing the wave at three noncollinear points.

Reduction of the data involves the solution of several trigonometric equations. This note describes a nomogram which

reduces this task to 30 seconds with ruler and pencil.

9365. Resonances in inelastic electron scattering from H2, M. G.

Menendez and H. K. Holt, J. Chem. Phys. 45, No. 8, 2743-

2744 (Oct. 15, 1966).

Key words: Electron scattering; H2, H2"; resonances;

vibrational excitation.

Resonance structure in the electron scattering from H2 has

been observed in two inelastic channels corresponding to excitation to the first and second vibration levels of H2(X'S!,+).

An overlapping of resonances due to at least two H2" states lying

between 1 1 and 13 eV is apparent. The structure in the inelastic channels is compared to the observed resonance structure in the transmission channel. The resonances are found to effec* the

inelastic channels more strongly than the transmission channel. The excitation function for direct vibrational excitation to the

78
v=l level was measured near threshold and found to increase

approximately linearly in this region.

9366. Time-dependent behavior of activated molecules. Highpressure unimolecular rate constant and mass spectra, F. H.

Mies and M. Krauss, J. Chem. Phys. 45, No. 12, 4455-4468

(Dec. 15, 1966).

Key words: Activated complex; activated molecules;

activated state; decay; dissociation; high pressure rate constant; kinetics; lifetime; mass spectra; metastable

molecules; predissociation; quantum mechanics; resonance

scattering; theoretical; unimolecular dissociation. A quantum mechanical theory of the unimolecular decay of

metastable, or activated molecules is developed using Fano's

treatment of resonance scattering. A resonance state is synonymous with the so-called activated molecule in unimolecular kinetics, and a set of widths are associated with

each state which is a measure of the coupling to the various

dissociation continuum channels (each channel designates an

"activated complex"). If the widths are small compared to the spacings between those neighboring states which are coupled to the same continua, then an ensemble of molecules prepared in a given activated state will decay exponentially in time, as does a

radiating or autoionizing excited atomic state. However,

unimolecular decay is fundamentally a problem in "overlapping" resonances widths, and is best considered using Fano's theory,

which incorporated proper treatment of the overlap. This paper

is particularly concerned with the implications of overlapping

widths on the high pressure rate constant, and on mass spectra.

There are two effects of overlapping which are most striking.

First, the time decay of a metastable molecule is no longer a pure

exponential, but for the special cases considered is represented

by a sum of exponential, oscillatory, and/or linear terms, which

certainly affects the interpretation of mass spectra. Second, the

high pressure rate constant is related to the initial rate of decay of

a canonical ensemble of activated molecules, and proper

consideration of overlap imposes an upper bound on the rate of

dissociation without any artificially imposed restrictions on the widths. This bound yields the "universal rate constant" kT/h

times a transmission coefficient which is a function of the widths

and spacings of the activated molecules, and has an upper limit of one.

9367. Bandlike structure from continuum-continuum emission:

the He. 600-A bands, F. H. Mies and A. L. Smith, J. Chem.

Phys. 45, No. 3 , 994- 1 000 (Aug. 1 , 1 966).

Key words: Atomic; collisions; continuous; deexcitation;

He; He2: metastable; radiative; spectra; theory; vacuumultraviolet. The continuous spectrum produced by the radiative deexcitation of m.etastable atoms by atom impact is an example

of molecular continuum-continuum transitions. It is shown that

if the upper molecular state has a deep attractive well and the lower state is repulsive, the continuous spectrum will show

banded structure similar to that obtained in bound-continuum

transitions from high vibrational states. The analysis is applied

to the radiative deexcitation of He(2'S) by He, which gives rise to the "600 A bands." The structure and temperature

dependence of these bands are well explained as banded

continuum-continuum emission. Structured continua observed

in other rare gases are discussed in terms of the m.olecular states involved.

9368. Infrared spectrum of the free radical CF.i isolated in inert matrices, D. E. Milligan, M. E. Jacox, and J. J. Comeford, J. Chem. Phys. 44, No. 10, 4058-4059 (May 1966).

Key words: CF2 reactions; CF.i free radical; CFuBr

photolysis; F atom reactions; HCFu photolysis; infrared spectrum; matrix isolation technique.

The free radical CF.i has been stabilized in inert gas and

nitrogen matrices at cryogenic temperatures following (1) the

reaction of photolytically produced CF2 and F atoms, (2) the vacuum ultraviolet photolysis of HCF3 and of CFuBr, and (3) the

reaction of photolytically produced C and F atoms. The

concentration of CF3 obtained in these studies has been

sufficient for direct infrared observation of three of its vibrational fundamentals, at 703, 1084, and 1248 cm"'. It is concluded that CFis, unlike CH^, is nonplanar in its ground state.

9369. Matrix-isolation study of the photolysis of cyanogen azide.

II. The symmetric stretching fundamental of the free radical NCN, D. E. Milligan and M. E. Jacox, i. Chem. Phys. 45, No.

5, 1387-1391 (Sept. 1, 1966).

Key words: Carbon atom production; carbon atom

reactions; cyanogen azide; force constants; infrared spectrum; NCN free radical; thermodynamic properties;

ultraviolet photolysis.

The photolysis of Ar:N3CN samples at 14 °K with the full light

of a cadmium arc has been found to permit complete conversion

of the cyanogen azide to the free radical NCN, plus molecular

nitrogen. At the high concentration of NCN thus achieved a weak absorption appears at 2672 cm~'. The photolytic behavior

of this feature and its shifts upon isotopic substitution support its assignment as the combination band (1^1 + ^3) of NCN, permitting

deduction of a value of 1 197 cm"' for vi of this species. The

thermodynamic properties of NCN have been revised in accord

with this assignment. The carbon-nitrogen stretching force constant approaches a value characteristic of a doubly bonded

species, and the stretching interaction constant is relatively large

and positive. Cyanogen azide photolyzes in both its 2750 and its 2200 A absorption regions to produce NCN+N^. However,

NCN itself photolyzes when subjected to radiation near 2500 A,

producing carbon atoms in the ''P state, which, in turn, may react with N2 to form the free radical CNN.

9370. Unassigned.

9371. Recombination of He+ and He"' + in the afterglow of a helium discharge, E. R. Mosburg, Jr., Phys. Rev. 152, No. 1, 166-176 (Dec. 2, 1966).

Key words: Brush-cathode plasma; collisional-radiative recombination; helium afterglow; recombination coefficient.

Studies of the time dependence of atomic and molecular light

intensities, electron density, atomic metastable densities and

electron temperature have allowed the determination of the He+ — electron recombination coefficient as a function of

electron density and temperature. The results are in reasonable

agreement with the theory of collisional-radiative recombination.

The mechanisms controlling metastable densities and heating of

the electron gas are discussed. In particular, the disappearance

of the 2^S metastable atom seems best explained in terms of

coUisonal de-excitation by electrons.

9372. A new guide for photographers, C. S. McCamy, Mag.

Stds. 37, No. 8, 223-224 (Aug. 1966).

Key words: Exposure; photography; standards. The new "American Standard Photographic Exposure Guide"

presents and relates data which provide means of calculating camera setfings for daylight and moonlight exposure of black- and-white and color films. The appendix gives guidance for photographing sunsets, clouds, the moon, artificial satellites, rainbows, cities at night, fireworks, lightning, aurora, stars, and

eclipses. The standard is based on extensive picture tests.

9373. Concepts, terminology, and notation for optical modulation,

C. S. McCamy, Photo. Sci. Eng. 10, No. 6, 314-325 (Nov.- Dec. 1966).

79
Key words: Absorptance; contrast; modulation; notation;

optical density; propagance; reflectance; reflectance factor; symbols; transmittance; transmittance factor.

Reflectance, transmittance, and optical density are regarded as kinds of flux modulation factors. Transmittance is defined as the

ratio of transmitted flux to the incident flux, while transmittance

factor is here defined for an optical system as the ratio of the emergent flux with the sample in the system to the emergent flux with the sample removed. Transmission density is defined as the negative logarithm of transmittance factor. This is essentially a new definition to accord with an old practice. Reflection,

transmission, and fluorescence are considered generically as propagation and generalized modulation terms are proposed. A

coordinate system and functional notation are adopted to systematize the description of optical systems which use or measure modulation. Simplified notation of the form

D(g;S:g';S') describes most cases. Terms, symbols, and

notation are proposed for standardization.

9374. Mass-spectrometric investigation of the nickel-fluorine surface reaction, J. D. McKinley, J. Chein. Phys. 45, No. 5, 1690-1693 (Sept. 1, 1966).

Key words: Fluorine; high temperature; kinetics; mass

spectrometry; nickel; surface reaction. Mass spectrometric measurements have been made of the reaction of poiycrystalline nickel at temperatures between 900

and 1600 °K with fluorine at pressures between 10"' and 10"^

torr. Gaseous NiF, NiF2 and F are the major products, and are formed rapidly on the surface at rates linear with fluorine pressure. NiF is present on the surface over the entire temperature range and desorbs above 1 100 °C; the desorption

step involves rupture of a Ni(substrate) — NiF bond and has an

activation energy of 28 kcal mol"'. NiF-i formation and

desorption are important between 900 and 1600 °K with a maximum rate at 1250-1300 °K. The rate limiting step in the formation of NiFa has an activation energy of 39 kcal mol"' and

is probably dissociation of fluorine on the surface.

9375. Classification of normal subgroups of the modular group, M. Newman, Trans. Am. Math. Soc. 126, No. 2, 267-277

(Feb. 1967).

Key words: Congruence groups; modular group; normal

subgroups; parabolic classes. The normal subgroups of the classical modular group are

studied, and theorems such as the following are proved:

(1) There are no normal subgroups of index 12q, where q is a prime > 1 1.

(2) There are exactly l+(q/3) normal subgroups of index 6q,

where q is a prime > 3 and (q/3) is the Legendre symbol.

(3) If there is no normal subgroup of index /u, and q is a prime

>fA, then there is no normal subgroup of index qV for all k g 0.

9376. Momentum autocorrelation function for systems with finite spatial boundaries, R. Nossal, J. Chem. Phys. 45, No. 4, 1097-

1100 (Aug. 15, 1966).

Key words: Diffusion coefficients; momentum correlation

function; statistical mechanics.

An exact analytical expression is obtained for the momentum

autocorrelation function of a particle moving in a one

dimensional box and slowed by dynamical friction. Comparison

is made with the results of Rahman's computer experiment for

liquid Argon.

9377. Equilibrium pressures of oxygen over AgaO — Ag at various

temperatures, E. M. Otto, J. Electrochein. Soc. 113, No. 7, 643-645 (July 1966).

Key words: Dissociation by heat; entropy; equilibrium; heat of reaction; oxygen pressures; silver oxide.

Although earlier investigators showed the dissociation of

Ag20 to be reversible and equilibrium points had been obtained

there was a range from 191 to 302 °C that had not been studied. This region has now been studied. From all the data available

and heat capacity data AH°298 and AS°298 have been calculated to be 14.690 kcal/mol O2 and 31.916 cal/deg, respectively. (1 calorie=4. 1840 joules.)

9378. Conformation of polyesters adsorbed on solid surfaces, P. Peyser, D. J. Tutas, and R. R. Stromberg, J. Polymer Sci. 5, Pt. A-1, 651-663 (1967); Book, Fundamental Aspects ofFiber

Reinforced Plastic Composites, Ed. R. T. Schwartz and H. S. Schwartz, pp. 163-176 (Interscience Publ., New York, N.Y.,

1968).

Key words: Adsorption: configuration of adsorbed polymer;

conformation of adsorbed polymer; ellipsometry; infrared; polymer adsorption; polyester.

The conformation of a polyester, poly(ethylene o-phthalate),'

of relatively low molecular weight was studied after adsorption.

The extension of the adsorbed molecule in a poor solvent on

several planar metal surfaces was studied by ellipsometry and

the fraction, p, of attached groups on colloidal silica particles in a good solvent was determined by the shift in the infrared absorption frequency between free and adsorbed carbonyl

groups. In contrast to previously reported results for polystyrene, the extension normal to the surface remained

constant (—70 A) while the concentration of polymer in the adsorbed film increased during the adsorption period. The value

of p(0.34 for MW=5400) is relatively high and was independent

of surface population for the range of solution concentrations

measured. Differences between these results and those for polystyrene are interpreted as resulting from differences in interaction energy and chain stiffness.

9379. Acoustical thermometer and the National Bureau of Standards provisional temperature scale 2-20 (1965), H. Plumb

and G. Cataland, Metrologial, No. 4, 127-139 (Oct. 1966).

Key words: Acoustical thermometry; isotherms below 20

°K; low temperature thermometry; primary thermometry;

speed of sound; ultrasonic interferometer.

An acoustical thermometer has been developed at the National Bureau^_of Standards to determine values of

temperature that approximate the Thermodynamic Temperature

Scale. The instrument, called an ultrasonic interferometer in acoustical literature, has been used to determine isotherms of the speed of sound in helium gas as a function of pressure. Each

isotherm has been extrapolated to zero pressure to approximate

the condition of an ideal gas; from the resulting intercepts, values

of temperature were calculated. The instrument and its operation are described and the data for isotherms, which have been determined at approximately every

degree from 2-20 °K, are listed. The isotherm data have been

treated both graphically and by electronic computer analysis (by

the method of least squares) to yield values of temperature that are the basis for a new temperature scale — NBS Provisional

Scale 2-20 (1965). When the scale is compared with other

existing scales, Tss and NBS (1955), in regions of overlap, the agreement with NBS (1955) is excellent but noticeable

departures from Tss-the helium-4 vapor pressure scale are

indicated.

9380. Microwave spectrum of CF., F. X. Powell and D. R. Lide,

Jr.,y. C/3ew.P/!ys.45,No. 3. 1067-1068 (Aug. 1, 1966).

Key words: CF2; dipole moment; free radical; microwave

spectrum; structure.
The microwave spectrum of the transient species CF2 has

been detected and analyzed. Eight rotational transitions have

been assigned and the rigid-rotor constants determined. The CF

distance is found to be 1.30 A and the FCF angle is 104.9°.

938 1 . The RF connector, R. C. Powell, Microwave J. 10, No. 3, 69 (Feb. 1967).

Key words: Coaxial techniques; precision coaxial

measurements; RF connector.

This paper describes the need for and the process of

development of precision coaxial techniques. It is intended as an

introductory article to an issue devoted to precision coaxial measurements.

9382. Comparison of Langmuir probe and spectrometric electron temperature measurements, R. S. Powers, Jr., J. Appl. Phys.

37, No. 10, 3821-3826 (Sept. 1966).

Key words: Electron temperature; Langmuir probe; plasma;

spectrometric.

Langmuir probes are often used for temperature

measurements in plasmas, due to their convenience and to their

ability to give time-resolved measurements. Since probe results are subject to several suspicions, we compare probe and

spectrometric electron temperature measurements in a particular

low-temperature plasma in which this is possible. We find probe

temperatures to be high by amounts between 40 and 4% over an

electron temperature range between 410 and 920 °K.

9383. Low temperature speed of sound in single crystal ice, T. M.

Proctor, Jr., J. Acoust. Soc. Am. 39, No. 5, 972-977 (May

1966).

Key words: Elastic constants; lattice dynamics; lattice parameter changes; single crystal ice; speed of sound;

thermodynamic properties.

Only one of the previous measurements of the elastic constants and speed of sound in single-crystal ice-I had been

extended below —30 °C. All of the five independent elastic constants have now been measured down to 65 °K. Elastic constant data have been fitted to second-degree polynomials.

From these polynomials a 0 °K value for the Cij's is extracted and

a Debye characteristic temperature of 225 °K is calculated. This

Debye temperature compares favorably with that previously

computed from heat capacity data. No sudden changes in the

pseudo-elastic anisotropic factor C33/C11 are found to take place at

1 90 °K as had been previously reported.

9384. Ionization energies of the neutral rare earths, J. Reader and

J. Sugar,/. Opt. Soc. Am. 56, No. 9, 1 189-1 194 (Sept. 1966).

Key words: Calculation; ionization; neutral; rare earths;

series. The ionization energies of the neutral rare earths have been

derived by means of interpolated values for the differences

between the 4f^'6s2, 4f''6s7s, and 4f^'6s8s configurations and the

difference in the effective quantum numbers of the 4f^'6s7s and

the 4f^6s8s configurations. In Ce i the 4f5d-ns series was used. The results in eV are: Ce I 5.65 Sm i 5.63 Er 1 6.10

Pr I 5.42 Eu i 5.68 Tm i 6.18

Nd I 5.49 Dy I 5.93 Yb i 6.25

Pmi 5.55 Hoi 6.02

The uncertainty is estimated to be ±0.02 eV in all cases but Ce i for which the estimated uncertainty is ±0.06 eV. Values for La i, Gd 1, and Lu i obtained spectroscopically by other workers are

also tabulated. The present results are compared with those

obtained by means of surface ionization. The calculated result for Tb I was inconclusive because of the lack of sufficient knowledge of the energy level structure.

9385. Comparison of direct and sensitized photolysis of 3- methylpentanal in vapor phase, R. E. Rebbert and P. J. Ausloos, J. Am. Chem. Soc. 89, No. 7, 1573-1579 (Mar. 29,

1967).

Key words: Aldehyde; energy transfer; photolysis; triplet state; vapor phase.

The direct and the benzene- and acetone-sensitized photolysis

of 3-methylpentanal produces butene-1, rra«s-butane-2, and cis- butene-2 by an intramolecular rearrangement process in which a hydrogen atom is transferred to the carbonyl group from a y- carbon atom. In the direct photolysis an increase in temperature

or a decrease in wavelength of the incident light results in an

increase in the percentage yield of butene-1 and in the ratio c/i/frfl«5-butene-2. The distribution of the butenes depends

upon the amount of energy given to the aldehyde whether by the

direct or sensitized photolysis. The benzene- and acetonesensitized experiments give additional evidence that the intramolecular rearrangement which involves the photoelimination of olefins can proceed through a triplet excited state. The following additional information was obtained in the course

of this study: (1) The aldehyde undergoes both triplet-triplet and

singlet-singlet energy transfer with benzene. (2) In the acetone- aldehyde systems only triplet-triplet energy transfer occurs. (3) A comparison of the distribution of butenes which was obtained

in the acetone-sensitized experiments with the butene

distribution in the direct photolysis at the same temperature

indicates that <81 kcal are transferred to the aldehyde by

acetone in a triplet-triplet energy transfer reaction.

9386. Molecular thermodynamics of simple liquids, pure

components, H. Renon, C. A. Eckert, and J. M. Prausnitz, I&

EC Fundamentals 1,52-58 (Feb. 1967).

Key words: Argon; molecular complexity; molecular

thermodynamics; Prigogine's cell theory; thermodynamic

properties; three-parameter theorem.

Thermodynamic properties of simple liquids are calculated from an analytical partition function which is based on a modification of Prigogine's cell theory and on a three-parameter

theorem of corresponding states. The partition function gives an

excellent representation of the configurational properties of

fifteen liquids ranging in molecular complexity from argon to neopentane. Three characteristic molecular parameters are

sufficient to calculate the configurational energy and entropy, the volume, coefficient of expansion and compressibility. These

parameters are a molecular size, a pair-potential energy, and a term which is closely related to non-central intermolecular

forces; this last parameter is a nearly linear function of Pitzer's acentric factor. The main application of this statistical thermodynamic treatment follows from its straightforward

extension to liquid mixtures as discussed in Part II.

9387. Atomic standards of frequency and time, J. M. Richardson

and J. F. Brockman, Phys. Teacher 4, No. 6, 247-256 (Sept.

1966).

Key words: Atomic frequency standards; atomic time;

cesium atomic beam; frequency and time standards;

standards; standard time scales. The national standard of time is provided by an atomic device

at the National Bureau of Standards. Thus, for the first time in our civilization, the basis of our measurement of time is atomic

instead of astronomical. The major reasons for this change are

that modern science can measure the resonance of an atom more

accurately than it can measure the motions of stars and planets,

all of the factors affecting atoms are better understood, and the atomic resonance appears to be more stable than planetary

motions. This change has improved our accuracy of

measurement by three orders of magnitude.

81
Presently, the best atomic clocks are based on atomic cesium

beams such as the three at NBS. Further research, however,

nsay reveal a better choice of atom or method. NBS is presently

using four radio stations to distribute time (and its reciprocal,

frequency) to the nation and over much of the globe but, again,

research is being conducted on newer techniques which offer higher accuracies.

The change from astronomical to atomic time will have little effect on our daily living habits, but it will permit our technology

to accomplish things we couldn't do before and to do the same

things more economically.

9388. Measurements of relative oscillator strengths of some C ii muitiplets, J. R. Roberts and K. L. Eckerle, Phys. Rev. 153,

No. 1,87-90 (Jan. 1, 1967).

Key words: Carbon ii; coulomb approximation; electron

density; electron temperature; equivalent electrons; local thermal equilibrium; oscillator strength (f- value); optical

depth; oxygen ii; plasma; T-tube.

An electric shock tube (T-tube) filled with a mixture of 95%

He and 5% CO2 at 0.5 torr initial pressure was the source for spectroscopic measurements of some C 11 oscillator strengths.

The absorption oscillator strengths of the C 11 2512 A, 2837 A,

3920 A, and 3876 A muitiplets were measured relative to the 4267 A C II multiple!. The plasma electron temperature was

determined by the relative line intensities of the 4254 A and

4642 A Oil Hues.

9389. The momentum autocorrelation function in a Bernoulli

chain, R. J. Rubin and P. UUersma, J. Math. Phys. 7, No. 10, 1877-1885 (Oct. 1966).

Key words: Coupled harmonic oscillators; momentum

autocorrelation function; statistical dynamics; statistical mechanics.

This paper is devoted to the study of the statistical dynamics

of the small amplitude coplanar vibrations of a compound

pendulum consisting of N + 1 particles suspended in series by

weightless strings in a gravitational field. All particles have the same mass m, except for the top particle whose mass is m(l+2);

and all strings are of equal length. The behavior of this system in the limit in which N ^ <» is of particular interest because the maximum norma! mode frequency is proportional to N"-. In the

limit N —» 00, asymptotic formulas with error estimates arc obtained for the time-dependence of the momentum

autocorrelation function of: (1) the top particle when 2=0; (2) the bottom particle when 2=0; and (3) the top particle when N>2S>1.

9390. An examination of the effects of heat transfer and

compressible flow on the performance of laminar

flowmeters, F. W. Ruegg and H. H. Allien, Proc. Flow

Measurement Conf., Am. Soc. Mech. Eng. Fluid Meters

Golden Anniversary, Pittsburgh, Pa., Sept. 26-28, 1966, pp. 253-273 (1966).

Key words; Compressible flow; flowmeter; gas meter; heat

transfer; laminar flow; meter calibration. Laminar meters are now widely used for measurement of gas

flow, and high accuracy can be achieved with proper calibration and use. It has been found necessary to modify Poiseuille's law

for laminar flow to explain the performance of meters over the wide range of flow conditions encountered. A one-dimensional

flow analysis is used to derive the effects of meter shape, heat

transfer, and compressibility of the gas on meter performance. A

relationship between the meter flow coefficient and the similarity

parameters of Reynolds number, Prandtl number, Mach number,

and Knudsen number is given in a form that is convenient for both the calibrator and user of the meter. The small but

significant effects predicted are compared with experimental

results.

9391. Gas-phase photolysis of isopentane at photon energies below

and above the ionization energy, A. A. Scala and P. Ausloos,7.

Chem. Phys. 45, No. 3, 847-354 (Aug. 1, 1966).

Key words: Hydrocarbons; ion-molecule reaction; isopentane; photoionization; photolysis.

The photolysis of (CH.3)2CDCH2CH,3, (CH.3)2CHCH2CD3

and of equimolar (CH3)2CHCH2CH,r(CDa)2CDCD2CD,,

mixtures has been investigated in the presence of NO at 1470 A

(8.4 eV), 1236 A (10 eV) and at 1048 A-1067 A (1 1.54-11.72

eV). Furthermore, in order to obtain quantitative information

concerning the free radicals produced in the fragmentation

processes, (CD,,)2CDCD2CD.-i has been photolyzed at 1236 A in the presence of various concentrations of H2S.

Fragmentation of the excited isopentane molecule produced at 8.4 or 10 eV, as well as of the superexcited molecule formed at 11.54-1 1.72 eV, yields mainly olefinic products and the following radicals, in order of decreasing yield;

HsCH:^C2H^C3H7. In addition, on the basis of the various

isotopically labeled products, it is concluded that methane,

ethane, and propane are split off from the excited isopentane

molecule by formation of (a) the corresponding carbene (1,2- elimination), or (b) the corresponding olefin (1 ,3-elimination).

When the energy of the photon is increased from 8.4 to 10.0 eV,

the 1 ,2-elimination processes become more important relative to the 1 ,3-elimination processes in all cases. At 11.54-11.72 eV,

the parent ion decomposes to form methane and ethane mainly

by a 1 ,3-elimination mechanism. It is derived from the results

that, in addition to the C^Hk^ and C3HB+ ions formed by the latter fragmentation processes, the ions C4HH+ and C3H7+ are produced with ion pair yields (M/N) of 0.15 and 0.06,

respectively. The ion pair yield of the parent ion is estimated to be 0.35. In contrast to observations derived from an earlier investigation of photoionization of n-butane at 1 1.54-1 1.72 eV,

an increase in pressure from 0.15 to 15 torr has only a minor

effect on the fragmentation of the parent ion.

9392. Ion-molecule reactions in the condensed phase radiolysis of hydrocarbon mixtures. I. 2-methylbutane and 3-methylpentane, A. A. Scala, S. G. Lias, and P. Ausloos,y. Chem. Soc. 88,

No. 24, 5701-5707 (Dec. 20, 1966).

Key words; Ion-molecule reaction; liquid phase photolysis;

liquid phase radiolysis; 2-methylbutane; 3-methylpentane.

In the condensed phase, parent ions of 2-methylbutane and 3- methylpentane transfer an H2-molecule to cyclopropane as well

as to smaller unsaturated hydrocarbons according to the

reaction: C„H2„+2* + C„,.H,„—>G"^+C,„'H„,.+2. The relative probabilities for the transfer of an K2-molecule from CoH^* to cyclopropane, ethylene, propylene, 1-butene, acetylene, and 2- butene are, respectively, 2.4, 1 .4, 1 .0, 0.9, 0.77, and <0. 1 . When

cyclopropane-d(; is added to iso-C3Hi2, CD2HCD2CD2H is formed as a product with a yield which increases as the square

root of the cyclopropane-de concentration from a G-value of

0.1 17 at 0.03 mole percent additive to 1.53 at 20 mole percent

additive, while all lower perprotonated hydrocarbon products

diminish proportionately. Similarly, addition of electron scavengers such as CCU to an i-C5Hi2-(CD2)3 (1:0.03) mixture

increases G(CD2HCD2CD2H) to a value as high as 2.85 while

the G-value of products such as C2H6, C2H4, or CsHg drop by

factor of five. The importance of the H2-transfer reaction to our

understanding of the condensed phase radiolysis of alkanes is discussed.

9393. Electron affinity of tungsten determined by its positive and

negative self-surface ionization, M. D. Scheer and J. Fine,

Phys. Rev. Letters 17, No. 6, 283-284 (Aug. 8, 1966).

Key words: Electron affinity; positive and negative self- surface ionization; tungsten.

82
It has been shown that negative as well as positive ions are evaporated from an incandescent tungsten surface thereby

establishing that the tungsten atom has a positive electron

affinity. When equilibrium is assumed between the metal surface and the evaporating ions, a quantitative estimate of the electron

affinity can be obtained from a measurement of the positive to negative ion emission ratio at some known surface temperature.

Measurements in the 2260 to 2350 °K temperature range yield a

value of 0.5 eV for the electron affinity of tungsten.

9394. The adsorption kinetics of nitrogen on rhenium, M. D. Scheer and J. D. McKinley, Surface Sci. 5, No. 3, 332-344

(Nov. 1966).

Key words: Adsorption kinetics; nitrogen; rhenium;

sticking coefficient; surface coverage. The adsorption of room temperature nitrogen on atomically

clean polycrystalline rhenium has been studied. The sticking

coefficients at zero coverage were found to be 0.060, 0.009, and

0.007 at rhenium surface temperatures of 205, 300, and 373 °K

respectively. These values are between one and two orders of

magnitude smaller than those in the nitrogen-tungsten system.

The dependence of the sticking coefficient upon surface coverage and temperature could be accounted for by assuming

an intermediate state weakly bound to an adsorption site. These

sites were assumed to be uniformly distributed over the surface. Their concentration was found to be less than 1/10 of the number

of substrate rhenium atoms/cm^. The binding energies of the intermediate state and the permanently adsorbed state were in the ratio of about 1/20 for both the nitrogen-rhenium and

nitrogen-tungsten systems. In view of this similarity, it is difficult to account for the large difference in sticking

probabilities unless one assumes that tungsten absorbs energy

from the intermediate binding state much more efficiently than

does the rhenium.

9395. Ferrimagnetic resonance low-field effects in rod samples, L.

B. Schmidt, R. D. Harrington, and W. E. Case, Proc. IEEE 55,

No. 1, 120-121 (Jan. 1967).

Key words: External tensor permeability; ferrimagnetic resonance; ferrites; garnet; low magnetic field effects; permeability; spin waves; tensor permeability; YIG.

A previously unreported absorption which is indicated in the curve of the imaginary part of the external permeability of rod- shaped samples is reported. This curve was transformed from

intrinsic permeability data obtained from measurements on

polycrystalline garnet samples of different densities. This energy

absorption revealed in the loss curve of the external permeability occurs in the vicinity of the dc field at which the intrinsic tensor permeability resonates and appears to be affected by the porosity

of the material. The phenomenon is more noticeable at L-band

frequencies than at S-band frequencies.

9396. Flash photolysis of matrix-isolated cyanogen azide in solid nitrogen, L. J. Schoen, J. Chem. Pliys. 45, No. 8, 2773-2776

(Oct. 15, 1966).

Key words: Decay; flash photolysis; lifetime; matrix

isolation; primary process.

Flash photolysis combined with matrix isolation spectroscopy

has been employed to investigate the decomposition of a cyanogen azide-nitrogen solid at 20.4 °K. Two primary

processes have been observed leading to the formation of NCN

radicals either in an electronically excited 'Ay level or in the ground state. The first order decay of NCN ('A,,) has been

studied and the mean lifetime in the solid found to be

approximately 500 microseconds.

9397. Superconductivity in semiconducting SrTIOs, J. F. Schooley and W. R. Thurber, (Proc. Intern. Conf. Physics of

Semiconductors, Kyoto, Japan, Sept. 8-11, 1966), J. Phys. Soc. Japan 21, Paper XVI-2, 639-642 (Suppl. 1 966).

Key words: Semiconductors; strontium titanate; superconductivity.

Superconductivity that occurs in a substance which is semiconducting at higher temperatures possesses features which

are different from ordinary metallic superconductivity. The

occurrence of superconductivity in a material of relatively low

charge carrier concentration n,. is due largely to an unusually

high density of states at the Fermi surface N(0); heat capacity

and superconducting critical field experiments, among others,

show the presence of the large N(0). The variability in Tic within an essentially constant electronic energy band structure leads to a corresponding variation in the superconducting transition temperature Tr. The presence of anisotropic Fermi surfaces in multi-valley semiconductors can result in unusually large and

anisotropic pressure effects. The relatively low carrier concentrations in semiconductors leads to unusually deep

penetration of static magnetic fields in the superconducting state. Finally, the static dielectric constant, which can be quite large in semiconductors, can be varied by combining similar semiconductors into mixed crystals; to the extent that the superconducting properties depend upon the dielectric properties, variation in Tc results.

9398. The dispersion of distributions derived from folding simple

distributions, R. A. Schrack, Nucl. Instr. Methods 45, No. 2, 319-321 (Dec. 1966).

Key words: Dispersion; distributions; folding; gaussian;

square; trapezoidal; triangular.

A graph is presented for obtaining the dispersion (full width at half maximum) of distributions, obtained by folding pairs of

simple symmetric distributions. The gaussian, triangular,

trapezoidal, and square distributions are considered.

9399. Divergence in the density expansion of the transport

coefficients of a two-dimensional gas, J. V. Sengers, Phys.

Fhnds 9, No. 9, 1 685- 1 696 (Sept. 1 966).

Key words: Dense gases; rigid disks; rigid spheres; thermal

conductivity; transport coefficients; triple collisions; viscosity.

An analysis is presented of the first density correction to the

viscosity and thermal conductivity coefficient of a two- dimensional gas of rigid disks. The existence of a divergence in the density expansion is established explicitly. For a two- dimensional gas the triple collision contribution to the transport

coefficients diverges logarithmically with the time between

collisions. In particular, for rigid disks, the coefficient of the logarithmic singularity in the viscosity and thermal conductivity

is evaluated in the first Enskog approximation. The possibility that as a consequence the transport coefficients depend

logarithmically on the density is discussed.

9400. Triple collision contribution to the transport coefficients of

a rigid sphere gas, J. V. Sengers, Phys. Fluids 9, No. 7, 1333-

1347 (July 1966).

Key words: Dense gases; rigid spheres; thermal

conductivity; transport properties; triple collisions; viscosity.

An analysis is made of the triple collision integrals which

appear in the expression for the first density correction to the thermal conductivity and the viscosity of a gas of rigid spheres.

It is shown that these triple collision integrals can be written as a sum of integrals associated with six triple collision events, each

of which consists of a certain sequence of correlated successive

binary collisions. A number of integrations are carried out and

the originally 1 5-fold triple collision integrals are reduced to

83
seven-fold integrals in a form suitable for numerical analysis.

The results are compared with the approximate predictions given

by the Enskog theory for a dense gas of rigid spheres.

940 1 . Correcting for astigmatism in the Czerny-Turner

spectrometer and spectrograph, A. B. ShaSer.Appl. Opt. 6, No.

1, 159-160 (Jan. 1967).

Key words: Astigmatism; Czemy-Tumer; spectrograph;

spectrometer.

It is shown that the Czerny-Tumer spectrometer and

spectrograph can be made approximately stigmatic by using

torroidal mirrors.

9402. Exactly solvable nonlinear relaxation processes. Systems of coupled harmonic oscillators, K. E. Shuler and G. H. Weiss, J. C/!ew. P/7yj.45,No. 4, 1105-1 1 10 (Aug. 15, 1966).

Key words: Harmonic oscillators; master equation;

nonequilibrium processes; nonlinear relaxation: relaxation

processes: stochastic processes. A class of nonlinear relaxation processes is discussed w hich

involves the interaction of two finite systems characterized by

special forms of the transition probabilities. For the particular

set of transition probabilities it is possible to reduce the initial set of coupled nonlinear kinetic equations to a set of linear equations

with time dependent coefficients which are amenable to exact

analytical solutions. This reduction is effected through the use of

summational invariants expressed in terms of the appropriate

combinations of the moments of the distribution functions of the two systems. The vibrational-vibrational relaxation of two

interacting systems of harmonic oscillators A and B has been

worked out as a specific example. For the type of relaxation processes discussed here it is found that the relaxation of system

A is independent of the form of the initial distribution of system

B (and thus of its time history) and vice versa.

9403. Observation of the D'A^-X'S" transition of CO in the vacuum-ultra>iolet region, J. D. Simmons and S. G. Tilford. J. Chem. Phys. 45, No. 8. 2965-2968 (Oct. 15. 1966).

Key words: Absorption spectrum: CO; diatomic spectrum;

electronic transition; rotational analysis; vacuum-ultraviolet

region.

A weak new band in the vacuum-ultraviolet absorption

spectrum of CO has been observed and analyzed as the D'A<-X'2+(l-0) band for both C'^O'^ and C'^O'^ The observed

rotational intensity distribution indicates this transition arises through mixing of the D'A state with neighboring states, principally the ATI state of the strong electric-dipole-allowed

fourth-positive system. A brief correlation of observed

electronic states with those arising from various electronic

configurations is given.

9404. Angle and channel dependence of resonance in e-He

scattering near 60 eV, J. A. Simpson, M. G. Menendez. and S. R. Mielczarek. Phys. Rev. 150, No. 1.76-78 (Oct. 7. 1966).

Key words: Angular difference; He. He": inelastic scattering; resonances; scattering.

The He^ resonances at 57.1 and 58.2 eV in the electron

scattering from He were studied as a function of angle in three

inelastic channels corresponding to excitation of the (ls2s)'*S. (ls2s)'S, and (ls2p)'P states of He. The line shapes of the resonances are found to vary with angle. The use of the FanoCooper formula, developed for the case of photon absorption, to resonances in inelastic electron scattering is discussed along with

a simple procedure for determining the line profile indices. The

angular dependence of the 'S, ^S, and 'P excitations at 56.5 eV

was also measured out to about 60°.

9405. Anomalous energy spreads in electron beams, J. A. Simpson and C. E. Kuyatt, J. Appl. Phxs. 37, No. 10. 3805-

3809 (Sept. 1966).

Key words: Electron beams; energy distribution. Energy distributions of 2 to 10 eV electron beams were measured in a deflection analyzer. The performance of the analyzer was monitored by use of a second one in tandem. In agreement with eariier measurements in higher energy beams the energy distribution varied with current. At low currents the energy distribution was Maxwellian at a temperature

corresponding to the cathode temperature. As the current increased toward the space charge limit the energy width

increased. The excess energy width could be fitted to a curve

linear in maximum current density and varying inversely with

beam energy to the three-halves power. No shift in most

probable energy was found. The results are not in quantitative

agreement with the higher energy low space charge measurements.

9406. The new tungsten-filament lamp standards of total irradiance, R. Stair. W. E. Schneider, and W. B. Fussell. /Ip/?/. Opr. 6, No. 1. 101-105 (Jan. 1967).

Key words: Blackbody; lamp standard; total irradiance. The NBS standard of total irradiance as presently issued in the form of a 50-watt carbon filament lamp was originally calibrated more than 50 years ago. Recently, needs for higher accuracy and

wider ranges of total irradiance have necessitated the setting up

of three sizes (100-. 500-. and 1000-watt) of tungsten-filament

lamp standards of total irradiance. These standards operate at a higher temperature than was possible with the carbon-filament

lamps, and are shielded, except for a narrow area of the bulb in front of the filament, so that the reception of long-wavelength

flux from the lamps is reduced to a minimum. The new lamps were calibrated by the use of a blackbody at a known

temperature together with a quartz plate whose spectral

transmittance was accurately determined. The quartz plate

limits the flux received from the blackbody to the spectral region

below about 4.5 microns and thus reduces errors resulting from

water vapor absorption at 6 microns and longer wavelengths.

Comparisons show the new standards to be in close agreement

with the carbon-filament lamp standard.

9407. Resolving power predictions from lens design data, O. N.

Stavroudis,/4pp/. Opt. 6, No. 1. 129-135 (Jan. 1967).

Key words: Correlation: lens design: resolving power.

A relationship between longitudinal spherical and longitudinal

chromatic aberration and resolving power is discussed and an experiment using this relationship to predict resolving power

from design data is described. The results show a high degree of

correlation between resolving power predicted by this method

and that obtained by measurement on real lenses.

9408. Glass-molten salt interactions, K. H. Stem. Chem. Rev. 66,

No. 4. 355-372 (July 25, 1966).

Key words: Conductance: diffusion: electrodes:

electrolysis: glass: molten salts. Phenomena involved in the interactions between glass and

molten salts are described and discussed. These include

diffusion and electrochemical phenomena occurring at the glassmolten salt interface. Their application to the design of glass

membrane reference electrodes for use in molten salts is discussed. The electrical properties of glass at elevated

temperatures are considered from a mechanistic point of view.

9409. Observation of the superconducting energy gap in a semiconductor (GeTe), P. J. Stiles. L. Esaki. and J. F. Schooley. Phys. Letters 23, No. 3, 206-207 (Oct. 17. 1966).

84
Key words: GeTe; semiconductor; superconducting energy

gap; tunnel junction.

A report of the first observation of the superconducting energy

gap in a semiconductor, GeTe, is given. The gap was observed

in a tunnel junction of Al- Al203-GeTe.

94 1 0. Lightness change of grays induced by change in reflectance of gray background, H. Takasaki, J. Opt. Soc. Am. 56, No. 4, 504-509 (Apr. 1966).

Key words: Contrast; crispening; lightness; Munsell value;

reflectance. A relatively small gray sample looks lighter (darker) when it is placed on darker (lighter) background. This phenomenon is an example of the well-known contrast effect. The purpose of this paper is to make a quantitative determination of the effect, and to derive a formula for it. For any given gray sample and gray surround on the left side, the observer was instructed to choose, for the different gray surround on the right, a different gray sample appearing equally

light as that on the left. It was found that lightness of a sample

changes rapidly with regard to its reflectance when this reflectance is close to that of background. This effect was named

the "crispening effect".

Several models (Von Kries coefficient law, Hurvich-Jameson

induction) were tried, but none of them reproduced the experimentally discovered crispening effect. A fairly successful

empirical formula was developed by adding to the formula for the induction theory a term for the crispening effect.

94 11 . Chromatic changes induced by changes in chromaticity of background of constant lightness, H. Takasaki, J. Opt. Soc. Am. 57, No. 1, 93-96 (Jan. 1967).

Key words: Chromatic induction; color; contrast; crispening; opponent color theory; surround color; three components color theory.

A relatively small gray sample looks reddish (greenish) when it

is placed on a green (red) background, and yellowish (bluish)

when it is placed on a blue (yellow) background. This

phenomenon is an example of the well-known contrast effect. The purpose of this paper is to make a quantitative determination

of the effect, and to check whether the empirical formula

previously derived for lightness contrast applies also to chromatic contrast. Two series of color samples were prepared

so that in the dominator-modulator system proposed by Judd,

only one of the three fundamental responses varied. For a given

member of one of these two series viewed on a surround of any

member of the same series on the left side, the observer was

instructed to choose, for a surround of a different member of the

series on the right, the member of the series producing most

nearly the same color appearance. The crispening effect which was found in lightness was also found in each of the chromatic

responses, green and violet; and the empirical formula derived

for lightness contrast was found to apply with fair success to the observations of each of the five observers, each with a different

set of constants.

9412. Zeeman effect and magnetic hyperfine structure in the low

frequency transitions of H>CO, H. Takuma, K. M. Evenson,

andT. Shigenari,y. Phys.Soc. 21, Xdll-Xdll (1966).

Key words: H2CO; magnetic hyperfine structure; RF

transition; Zeeman effect. The Zeeman structure and the center frequencies of the

43i-*4.,2 and the 532—»533 transition of H2CO were measured. The

spectra agreed with theory using recently redetermined

molecular constants.

9413. Micrometer U-tube manometers for medium-vacuum

measurements, A. M. Thomas and J. L. Cross, J. Vacuum Sci. Technol. 4,No. 1, 1-5 (Jan.-Feb. 1967).

Key words: Manometers; mercury; micrometer; oil; Utube; vacuum measurement; water. A family of U-tube manometers, suitable for use as standard

instruments, has been designed and constructed at the National

Bureau of Standards to cover the range of pressures from 1 00 to

1 X 10"^ torr. In these instruments the levels of the two liquid surfaces are measured by adjusting micrometers with conical

points ground on the ends of the spindles. One hundred mm and

fifty mm range mercury manometers, with spindles approaching

the liquid surface from above, are used for differential or

absolute pressure measurements up to 100 torr. Pressures less than 3.5 torr are measured with oil manometers, in which the micrometer spindles approach the surfaces from below.

Measurements made with the mercury manometer have an

uncertainty of about 4 x 10"^ torr plus eight parts in one hundred

thousand of the reading. Measurements made with the oil manometer have an uncertainty of about 4 x lO"'' torr plus two

parts in ten thousand of the reading.

9414. Intramolecular insertion of isobutylidene in the vacuum

ultraviolet photolysis of isobutane, E. Tschuikow-Roux and J. R. McNesby, Trans. Faradv Soc. 62, No. 524, 2158-2163

(Aug. 1966).

Key words: Insertion; isobutane; isobutylidene; photolysis; vacuum ultraviolet. The direct photolysis of isobutane was carried out at the Xe

resonance line (1470 A) at 25 °C over the pressure range 5.3 to 410 torr (1 torr = 1/760 atmos = 133.32 N/m^) with and without

added nitrogen. Specifically, evidence for the intramolecular

insertion of isobutylidene resulting from the carbene elimination

of H2 was sought and found. From the C4 product distribution at the highest pressure it was deduced that the ratio of

isomerization of isobutylidene to intramolecular cyclization is 19:1.

9415. Reactions of ethylidene in the vacuum ultraviolet photolysis of ethylene, E. Tschuikow-Roux, J. R. McNesby, W. M.

Jackson, and J. L. Fans, J. Phys. Chem. 71, No. 5, 1531-1533

(April 1967).

Key words: Carbene; ethylene; ethylidene; gas phase;

photolysis; solid phase; vacuum ultraviolet.

Ethylene was photolyzed at the. 1470 A Xe resonance line both in the gas and solid phase (36 °K). The gas phase photolysis

gave no products characteristic of bimolecular reactions of

ethylidene. However, in the condensed phase, photolysis gives

methylcyclopropane and much larger amounts of cyclopropene

and methylcyclopropene. The mechanisms of production of

these products are discussed as well as the relationship of

ethylene photolysis to the photolysis of other sources of

ethylidene.

9416. Electronically excited NO by photodissociation of NO2 and

NOCI, K. H. Welge, J. Chem. Phys. 45, No. 4, 1113-1117

(Aug. 15, 1966).

Key words; Fluorescence; nitric oxide; nitrogen dioxide;

nitrosyl chloride; vacuum ultraviolet. The photodissociations of NO2 and NOCI yielding

electronically excited NO are observed by the fluorescence of

NO(y) andNO(j8) bands:

N02^NO(A22+, v=0)+O(3P)

NOi^NO(B2n, v=0, 1,2, 3)+0(3P)

NOCI^NO(A2i;+, v=0, l,2)+CI(2po)

85
Dissociation of NO-) is observed at wavelengths 1 165, 1236,

and 1295 A but not at 1470 A and longer wavelengths.

Dissociation of NOCI is found at wavelengths from 1 1 65 A up to about 1600 A. The NO(A-'X+) and NOCB^O) molecules from

NO2 and NOCI are strongly rotationally excited.

9417. Formation of NH(c'n) and NH(A^n,) in the vacuum-uv

photolysis of HN3, K. H. Welge, J. Chem. Phys. 45, No. 11,

4373-4374 (Dec. I„i966).

Key words: Fluorescence; hydrazoic acid; NH; photolysis; vacuum ultraviolet. The fluorescence of NH(c'n. v=0,l) and NHCA^n,, v=0,l) is obtained when HN,-? is photolyzed in a flow system at wavelengths from 1236 A up to about 1750 A. Rotational levels of the c'n, v=0 state are observed up to K=20.

The formation of NH(c'n) is attributed to the photodissociation of HNa into N2(X>2,/)+NH{c'n) and that of

NH(A'n,) to some not identified secondary reactions. This

explanation is based on the finding that the NH(c'n) emission is not affected by the flow rate whereas the NHlA^n,) emission

decreased with increasing flow rate.

941 8. Formation of N2(A^2+) and N(2D,2P) by photodissociation of HN.J and N2O and their reactions with NO and N2O, K. H. Welge, y. Chem. Phys. 45,No. 1, 166-170 (July 1, 1966).

Key words: Energy transfer; fluorescence; hydrazoic acid; nitrous oxide; photolysis.

The formation of N0(A-1+) and NO(B-n) in the photolysis of

N2O at 1236 A and 1470 A was investigated by observing the fluorescence of the y and /? bands. The /3 band fluorescence is obtained when pure N2O is photolyzed at 1236 A and 1470 A in a flow system. The /3 bands are observed with vibrational excitation up to V=3. The /3 bands disappear with the addition

of small amounts of NO whereas the emission of rotationally hot y bands is obtained. The y bands are observed with vibrational excitation up to v'=2. According to the energetics, NO(A^2+)

and NO(B2n) are formed at 1470 A as well as at 1236 A not by

direct photodissociation of N2O but by secondary reactions. No

fluorescence is obtained when N2O or N2O/NO mixtures are

irradiated at wavelengths g 1600 A, i.e., within the long

wavelength absorption band of N2O.

The y and /3 band fluorescence is explained by the following

mechanism: photodissociation of N2O At 1236 A and 1470 A,

N2(A32„+)+0(3P)

N2O

N(2D and/or 2P)-1-NO(X2n),

followed by the reaction

N(2D and/or 2P)+N20^NO(B2n)H-N2

NO(B2n)^NO (Xm)+p bands.

This reaction is intercepted effectively by NO, possibly through

N(2D and/or 2P)-fNO-^N2+0

thus causing the disappearance of the /3 band emission with the addition of NO. At sufficiently high concentration, NO reacts withN2(A35;„+) via N2(A32„+)+NO(X2n)->N2(XiV)+NO(A22+)

NO(A22+)-*NO(X2n)+y bands.

The emission of y bands is also obtained in the photolysis of

HN,)/NO mixtures at 1470 A and 1236 A. This observation is explained by the photodissociation

H N3^N2(A32;„+)->N H(X=2-)

followed by the above reaction between N2(A'S„+) and NO,

yielding NO(A2S+). The other possibility, that O atoms which

are formed by photodissociation of NO react with HN:) to form

excited NO-as in the O/N2H4 atomic flame -is excluded.

9419. EPR in single crystals of NiBrj, J. S. Wells and D. R. WinderJ. Chem. Phy.^. 45,No. 1,410-411 (July 1, 1966).

Key words: Antiferromagnetic; EPR; g value; K-band

spectrometer; NiBr2; single crystal.

Previously reported EPR measurements on NiBr2 gave a

single g value and linewidth for the resonance in a powdered

sample. We have made measurements with a K-band

spectrometer on a single crystal of this material as work

preliminary to measuring the internal fields in the antiferromagnetic state. The spectra have been examined at 300

and 76 °K. At 300 °K, g^ =2.2 1+0.02, gll=2. 19±0.02,

AH -L =800 gauss and AHIi=1000 gauss. At 76 °K,

gi=2.23±fl.01, gll=2.16±0.01, AH -L =400 gauss and AHll=600

gauss. At 4 °K, the resonance was not observed within the range

of our spectrometer.

9420. Matrix elements of general potentials in the harmonicoscillator representation, R. M. Wilcox, 7. Chem. Phys. 45, No.

9,3312-3316 (Nov. 1, 1966).

Key words: Fourier transform; function V(q); harmonic

oscillator; matrix elements.

The m, n matrix element of an arbitrary potential function V(q)

in the one-dimensional harmonic oscillator representation is shown to be given by

<m| V(q)|n) = i H(m-"'r"(rr)! j-l

dyg(ay)e-'-(iy)'"—

where a=(2(olfiyi- , and g (ay) is the Fourier transform of V(g).

This formula is specialized to the cases where V(g) is given by

qjg-i/iyq2

e'tt"', and q"' sin (aXq), where j is a non-negative

integer and 7, u, and k are real parameters. Results are compared, where possible, with previous work.

942 1 . Chemisorption of nitric oxide on tungsten, J. T. Yates, Jr. and T. E. Madey, J. Chem. Phys. 45, No. 5, 1623-1634 (Sept.

1, 1966).

Key words: Adsorption; chemisorption; desorption;

dissociation; field emission microscopy; kinetic; nitric oxide; surface; surface diffusion; tungsten; work function. The chemisorption of NO on polycrystalline W has been

investigated using a combination of ultrahigh vacuum

techniques: flash desorption mass spectroscopy and field emission microscopy. It has been found that NO chemisorbs

non-dissociatively on W at room temperature. Dissociation occurs at elevated temperature with an activation energy of

about 47 kcal/mole (197 kJ/mole). Kinetic evidence indicates

that dissociation involves the interaction of an adsorbed NO

molecule with a neighbor empty site. At high NO coverage,

dissociation is rate controlling for the liberation of co-mode

nitrogen near 1000 °K. Heating of an NO-shadowed W field emission tip above —700 °K results in the formation of a receding boundary which remains sharp during the entire course

of its backward motion over the initially covered region. This

behavior is consistent with a model involving dissociation of NO

at the boundary where empty sites are available. For monolayer

NO (1.4 x 10'-^ molecules cm^^) on polycrystalline W,

A(/)=+1.85±0. 10 eV; this corresponds to an average surface

dipole moment of 0.35 debye per chemisorbed NO molecule at

full coverage.

9422. The effect of other metallic ions on the electrocrystallization of silver from nitrate solutions, J. P. Young, Plating 54, No. 3, 272-274 (Mar. 1967).

86
Key words: Crystal growth: dendrite; electrociystallization:

electrodeposited crystals; electrodeposited dendrites: silver.

Silver dendrites of various configuration and forms were grown electrolytically on small cathode surfaces in silver nitrate solutions to which small amounts of other metal ions had been

added to alter the characteristics of the non-epitaxial silver formations.

9423. Effect of surface patch fields on field-emission workfunction determinations, R. D. Young and H. E. Clark, Phys. Rev. Letters n,No.7 ,351-353 {Aug. 15, 1966).

Key words: Energy distribution; fiel^ emission; patch fields; single crystal planes: work function.

Laplace's equation is used to show that substantial

electrostatic patch fields exist on field emission tips due to work

function differences over the various single-crystal planes. The

implications of these previously neglected fields are discussed in regard to their effect on measurements of work function. A

derivation is given for a new energy distribution method of

determining work functions, and a method is suggested for obtaining values of work function which are independent of both

the patch fields and the applied field.

9424. Anomalous work function of the tungsten (110) plane, R. D. Young and H. E. Clark. Appl. Phys. Letters 9, No. 7, 265-268

(Oct. 1, 1966).

Key words: Energy distribution; field emission; patch fields; tungsten; work function; (110) plane.

Work function measurements have been carried out on the densely packed (110) plane of tungsten. Field ion microscope

techniques have been used to obtain atomically perfect single

crystal (110) planes. Field electron emission energy

distributions have been combined with Fowler-Nordheim

measurements to give work function values at 77 °K. The

electrostatic patch fields which exist at the measured surface

result in corrections which tend to increase the work function

value. The measurements reported here are not corrected for patch fields and range in value from 7.1 eV to 8.7 eV for the

(110) plane. Future measurements will employ a newly

discovered technique involving a family of energy distribution

plots which eliminates the correction for patch fields.

9425. Translational diffusion in polymer solutions, R. Zwanzig, J. Chem. Phys. 45,No. 5. 1858-1859 (Sept. 1, 1966).

Key words: Diffusion coefficient; polymer; solution; theory.

Kirkwood's theory of the translational diffusion coefficient of

a polymer molecule in solution is criticized. It is shown to give

incorrect results, by a factor of 11/12, for a rigid ring-shaped

polymer.

9426. Ground state of bis(acetylacetonato) copper (11), H. C.

Allen, Jr., y. Chem. Phys. 45,No. 2,553-555 (July 15, 1966).

Key words: Bis(acetylacetonato) copper (II); bis(3-phenyl2,4-pentanedionato copper (II); crystal spectrum; polarized

spectrum.

Existing data on the polarized crystal spectrum of

bis(acetylacetonato) copper (II) are interpreted. Through the use of a lower molecular symmetry than had previously been

used, it is possible to present an interpretation consistent with

that for the spectra of other bis copper (II) chelates.

9427. A network-simulation approach to the railroad freight train scheduling and car sorting problem, W. P. Allman, Proc. 4th

Intern. Conf. Operational Research, Boston, Mass., Aug. 29-

Sept. 2, 1966, (Arthur D. Little Inc., Cambridge, Mass.,

1966).

Key words: Freight operations; GPSS; railroads; scheduling; SIMSCRIPT: simulation; sorting.

These interdependent questions must be answered

simultaneously, and in accordance with overall operating

objectives of the railroad interprise. Policies must be revised

periodically when significant changes in demand traffic patterns

occur. The paper describes a simulation model which permits

experimentation with various alternative railroads freight

operating policies at a total-network level. The model has been

constructed with the SIMSCRIPT simulation programming

language. Model inputs include time-dependent freight car

origin-destination demand data, train routes and schedules, yard

sorting and operation policies, and assignments of cars to trains for hauling. Freight cars are sorted at yards, and picked up and

dropped off by trains which haul them thru the network. Model

outputs include several railroad operation performance measures

such as origin-destination transit times, activity volumes, train lengths, delays incurred by cars at yard operations, and operating

costs.

9428. Mass flowmeters in cryogenic service, W. J. Alspach, C. E.

Miller, and T. M. Flynn, (Proc. ASME Flow Measurement

Conf., Pittsburgh, Pa., Sept. 26-28, 1966), Book. Flow

Measurement Symposium, pp. 34-56 (American Society of

Mechanical Engineers, Pittsburgh, Pa., Sept. 1966); Mech.

Eng. S9,No. 5. 105-1 13 (May 1967).

Key words: Accuracy; calibration; commodity transfer; cryogenic; cryogenic processes; density; flowmeters; mass

flow: mass flowmeters; performance results; propellant

management; substitute fluid: volume flow.

This paper concerns cryogenic fluid mass flow measurement

by a variety of techniques, including those that are available and

those that are being developed. Attention is given to the

principle of operation, performance results, and operational and

design characteristics. The problem of cryogenic fluid flowmeter calibration is examined and discussed with reference to available facilities, techniques, limitations, and accuracy. The problem of

calibration for special cryogenic applications, such as slush hydrogen and cold gasses, where no calibration facilities are

available is also examined. Inferred calibration from a substitute

fluid calibration or design practices is also reviewed.

To improve the mass flow measurement of cryogenic fluids,

discussions are directed towards measurement technique

selection, density measurements for inferential mass systems,

improvements in volumetric flow measurements, improvements

in direct measuring mass flowmeters, and improvements in calibration.

9429. Cryogenic coil for megajoule energy storage, V. Arp, Proc.

Intern. Symp. Magnet Technology, Ed. H. Brechna and H. S. Gordon, pp. 625-629, (U.S. Atomic Energy Commission,

1965).

Key words: Aluminum; cryogenic magnet; energy storage;

induction coil; liquid hydrogen.

A liquid hydrogen cooled induction coil is being constructed

for short time energy storage of lO*' joules. The coil is made of very pure aluminum having an electrical resistivity of about 3 x 10 " ohm cm at 20 °K. The coil parameters are dictated by its proposed use for the Army Missile Command, and are as

follows: inductance of 50;u, henries, charging time of 10 seconds

or less from zero to peak current of 200,000 amperes, and

maximum terminal voltage during discharge of 12,000 volts. The

coil will be housed in a non-metallic dewar, and powered from

batteries. Details of the coil and cryostat design and electrical

87
circuits will be discussed. The basic design is capable of being

pushed to higher energy storage without major difficulty.

9430. Electron microscopy and difTraction of synthetic corundum

crystals. II. Dislocations and grain boundaries in impuritydoped aluminium oxide, D. J. Barber and N. J. Tighe, Phil. Mag. 14,^0. 129,531-544 (Sept. 1966).

Key words: Aluminium oxide; dislocations; electron microscopy; grain boundaries; impurities; sapphire.

Boules of aluminium oxide containing various impurities,

grown by the Vemeuil technique, have been examined by

transmission electron microscopy. Most of the samples have

dislocation densities ~6 x 10^ cm"-, excluding grain boundaries.

This is two orders of magnitude higher than that for comparable

undoped crystals. There is a higher incidence of low angle

boundaries and the characteristics of these are described. The

samples rarely contain internal precipitates; furthermore,

precipitates in sapphire do not normally create significant

numbers of dislocations. The interactions of a singularity with a basal network of

dislocations with 1/3 (1 120) Burgers vectors are analyzed. The

configuration is not consistent with the singularity being a (1010) dislocafion, but it can be explained by assigning the

singularity a 1/3 (101 1) vector.

9431. The determination of mercury in latex paints and paint

films containing mercury fungicides, H. W. Berger, J. Paint

Technol. 38, No. 498, 37 1-376 (July 1966).

Key words: Analysis; colorimetric; dithizone; paint film; fungicide; latex; mercury; paint.

A new method has been developed for the spectrophotometric

analysis of mercury in latex paints. The method, based on the complexing of Hg(II) with diphenylthiocarbazone, can be used

to assay the mercury in the whole paint, the dry film, and in commercial fungicides, as well as other industrial and

agricultural materials. The procedure is rapid, requires only

simple techniques, and is capable of an average accuracy of 1%.

Inorganic pigments, and other components usually found in latex paints, do not interfere with the analysis.

9432. Roofing research, T. H. Boone, Military Engr. 58, No.

385, 344-345 (Sept.-Oct. 1966).

Key words: Liquid-applied coatings; membrane

movements; prefabricated sheets; radiative cooling; roofing

research; solar heating.

The Building Research Division of the National Bureau of

Standards has for many years studied roof systems, constituent

materials and components. Highlights of the roofing research in the last five years and a brief resume of the results of this research are given. Description of some of the newly-developed

roofing systems and the present status of roofing research are also discussed.

9433. Adhesive bonding of various materials to hard tooth tissues. VI. Forces developing in direct-filling materials during

hardening, R. L. Bowen, J. Am. Dental Assoc. 74, No. 3,439-

445 (Feb. 1967).

Key words: Adhesion; bonding; dental; filling materials; hardening; shrinkage; strain; stress; tensile.

Tensile forces will develop when dental filling materials shrink

as they harden within a cavity, if there is bonding to the cavity

walls. A test method was devised by which these forces could be

measured. This was done by observing the loading required to maintain constant distance between two opposing walls (having

known area) of an artificial cavity. If several broad assumptions

are made, it can be estimated that a tensile stress of at least 49

kg/cm^ (700 psi) at the walls of a cavity may develop during the

hardening of a direct filling resin. The corresponding stress for a

silicate cement would be about 35 kg/cm^(500 psi). Other direct

filling materials were also investigated. The magnitude of the

stress depended on the exact test method, the material, and other

factors. The strength of adhesive bonding between a direct filling material and the cavity walls of a tooth must exceed the tensile stresses that develop during the hardening of the filling material,

if the bonding is to remain intact.

9434. Dielectric constants of PbMoOi and CaMo04, W. S. Brower and P. H. Fang, Phys. Rev. 149, No. 2, 646 (Sept. 16, 1966).

Key words: Calcium molybdate; dielectric constant; lead molybdate; single crystal.

The dielectric constants e' of PbMo04 and CaMo04 were measured at 24.5 °C in air. Two specimens of each orientation were measured. The average values and the deviations for the measured dielectric constants are as follows: PbMo04:e'i|fl,

34.0±0.4; e'llc. 40.6±0.2; CaMo04:e'lla. 24.0±0.2; e'llc, 20.0+0.2.

9435. Measurement of thermal neutron flux, R. S. Carter, C. O.

Muehlhause, and V. W. Meyers, IEEE Trans. Nucl. Sci. NS14, No. 1,414-415 (Feb. 1967).

Key words; Absolute gamma ray source strength; black

glass beads; thermal neutron flux. A new technique has been developed for the measurement of

thermal neutron flux. Small glass beads (~1 mm radius) are made black to thermal neutrons by the inclusion of B'". In

addition, a 1/v activator such as cobalt, dysprosium, or indium is incorporated in the glass to measure the fluence (nvt). Following activation over a measured time interval, the absolute source strength of a Co bead is determined by y-y coincidence.

The flux is directly proportional to the gamma ray source

strength. The Dy and In beads are calibrated relative to a Co

bead.

9436. Collagen aggregation phenomena, J. M. Cassel,

Biopolymers 4, 989-997 (1 966).

Key words: Collagen; end-to-end bonding; hydrophobic

bonding; lateral aggregation; native aggregation;

temperature coefficient.

Three processes by which tropocollagen units associate to

yield highly specific aggregates have been examined. From the temperature coefficients of the amounts aggregated it is concluded that the complex "native" aggregation is endothermic

whereas both end-to-end and lateral aggregation are exothermic.

These results combined with additional information lead to the conclusion that "native" aggregation is an entropy driven process in which hydrophobic bonding plays the dominant role. In contrast the reactions producing the lateral aggregate and the aggregate in which end-to-end bonding is dominant are

electrostatically governed.

9437. Glass research at the National Bureau of Standards, G. W.

C\&&k,Glass Ind.41,no. 12, 663-669 (Dec. 1966).

Key words: Glass research; glass technology; properties of

glass.

A general account of the research and development in glass

technology at the National Bureau of Standards is presented. A

brief history of the Bureau's interest in glass is given, followed by

a description of the present effort on specific projects in the Inorganic Glass Section of the Inorganic Materials Division.

9438. Effective charge carrier lifetime in silicon p-i-n junction

detectors, J. A. Coleman and L. J. Swartzendruber, (Proc. 10th

88
Scintillation and Semiconductor Counter Symp., Washington,

D.C., Mar. 23-24. 1966), IEEE Trans. Nucl. Sci. NS-13, No.

3,240-244 (June 1966).

Key words: Charge carrier lifetime; lithium-compensated

silicon; semiconductor nuclear radiation detectors. An estimate of the effective charge carrier lifetime can be

obtained from a determination of the collection efficiency as a

function of the transit time for charge carriers produced by

incident short-range radiation in a p-i-n junction detector. The

results of this method have the advantage of being independent

of both the charge carrier mobility and the depletion depth of the

detector. Effective lifetimes as low as a few microseconds (t?) for electrons produced by natural alpha particles have been

observed in several 2 mm thick lithium-compensated silicon detectors operating at room temperature. No significant bias dependent windows which might cause misleading interpretation

of the results were observed. Window effects were investigated

by measuring the changes in pulse height of detector output

signals initiated by natural alpha particles incident on the detectors at angles up to 45 degrees. The electron lifetimes were

observed to decrease when the detector was operated at liquid

nitrogen temperature. The short effective lifetimes that can

occur in lithium-compensated silicon set a lower limit on the field strengths that must be maintained for efficient charge collection

in thick p-i-n junction detectors. Effective hole lifetimes can also be obtained using this technique but with the present geometry of

lithium-compensated silicon detectors this measurement is more

difficult if short-range particles are used. The effects of charge

carrier lifetime and amplifier pulse rise and fall times on the observed radiation-induced pulse shapes are discussed.

9439. Interface kinetics and the stability of the shape of a solid sphere growing from the melt, S. R. Coriell and R. L. Parker,

(Proc. Intern. Conf Crystal Growth, Boston, Mass., June 20-

24, 1966), Crystal Growth, a Siippl. to J. Phvs. Chem. Solids

J3, 703-708 (Pergamon Press Inc., New York, N.Y., 1967).

Key words: Crystal growth; diffusion; heat flow; interface;

kinetics; morphology; sphere; stability.

The effects of linear interface kinetics and of square law

interface kinetics on the stability of the shape of a sphere

growing in a diffusion field are investigated theoretically. Slow

interface kinetics can greatly enhance the stability, by several orders of magnitude in certain cases. The sphere can be stable even if its surface energy is zero. Numerical estimates are made

for salol and for tin.

9440. The ionization constant of deuterium oxide from 5 to 50°, A.

K. Covington, R. A. Robinson, and R. G. Bates, J. Phvs.

CAew. 70, 3820-3824 (1966).

Key words: Deuterium oxide; heavy water; ionization constant; isotope effects.

Electromotive force measurements of a cell without liquid

junction have been used to determine the ionization constant of

deuterium oxide from 5 to 50°. The value found for pA^ at 25° is 14.955 (molality scale), 14.869 (molarity scale), and 16.653

(mole fraction scale). Enthalpy, entropy, and heat capacity

changes for the dissociation process have been evaluated.

9441. Mechanical relaxation in polychlorotrifluoroethylene, J. M.

Crissman and E. Passaglia, J. Polymer Sci. Pt. C, No. 14, 237-

245 (1966).

Key words: Apparatus; isothermally crystallized sample;

loss compliance; loss modulus; mechanical relaxation; polychlorotrifluoroethylene; quenched sample; storage

modulus; tan S; torsion pendulum; varying crystallinities.

Measurements of the viscoelastic functions A, C, C", J', and

J" as functions of temperature from — 1 80 to -I- 1 80 °C have been

obtained, using a torsion pendulum apparatus, for several samples of polychlorotrifluoroethylene having widely different

crystallinities as determined by density. The low crystallinity

samples show two relaxations: a very broad one (y) centered at about —35 °C which appears to be split into two processes, and

one (|S) at 84 °C. In the higher crystallinity samples, a third process (a) appears at about 137 °C, and the high temperature

side of the y relaxation peak is lower in magnitude as compared

to the lower crystallinity specimens. For the (3 peak, which is assumed to be associated with the glass transition, the peak value

for G" is essentially independent of crystallinity, while both A

and J" show decreases in magnitude with increasing crystallinity.

The relationship between the magnitude of the relaxation peak

and crystallinity, and dependence of this relationship upon the

viscoelastic function chosen to characterize the relaxation are

discussed.

9442. Soft X-ray spectrum of Ni and comparison with

photoemission and ion neutralization results, J. R. Cuthill, A.J.

McAlister, and M. L. Williams, Phvs. Rev. Letters 16, No. 22,

993-995 (May 30, 1966).

Key words: Ag; Cu; double electron photoexcitation; Ni;

photoemission; soft X-ray spectrum.

The soft X-ray M2.3 spectrum of Ni has been observed, and new features found. The spectrum agrees well with ion

neutralization results on Ni, but disagrees sharply with the density of states deduced from the photoemission spectrum of

Ni. A double electron photoexcitation process which removes

this discrepancy is suggested and shown to fit the available

photoemission data on Ni and Cu and Ag as well.

9443. Molecular emission spectra in the soft x-ray region, R. D.

Deslattes and R. E. LaVilla, Appl. Opt. 6, No. 1, 39-42 (Jan. 25, 1967).

Key words: Molecular energy levels; molecules; x-ray

spectra.

Spectra from several chlorine-containing hydrocarbon

molecules excited to x-ray fluorescence have been recorded by a double crystal spectrometer with high resolving power. This

study focuses on the region near the occuixence of the transition —>/8i,3(ls-i/<3/?-i) in chlorine. Whereas the free atom spectrum

(from a single vacancy process) consists of an unresolved spinorbit doublet, e.g., in argon, the molecular spectra often contain

several lines. In free atom spectra and in molecular spectra also, there are extra lines or unresolved multiplets (satellites) due to multiple vacancy processes. In this report, these satellite lines are experimentally sorted out of the spectra and the remaining

emission peaks associated with possible final state configuration

containing a vacancy, i.e., the electronic terms of the molecule.

9444. Mossbauer spectrometry, J. R. DeVoe and J. J. Spijkerman, Anal. Chem. 38, 382R-393R ( 1 966).

Key words: Chemical structure analysis; Mossbauer

spectroscopy.

A review of the applications of Mossbauer spectroscopy to chemical analysis, and a bibliography of publications on these

applications in 1965 are presented. The principle of the spectrometer as well as a discussion of errors associated with its use are described. Current theoretical interpretation of some

aspects of the Mossbauer spectrum are discussed. Chemical

structure analysis is the most prevalent application to date, and

other applications, such as metallurgy and quantitative analysis

appear to be promising.

9445. Some relations for straight dislocation, R. deWit, Phvs.

5/af.5o/. 20, 567-573 (1967).

Key words: Continuum; crystal; defect; dislocation; displacement; interaction; isotropic; strain; stress.

313-589 0-69—

89
Expressions are presented for the stress, strain, dilatation, and

displacement due to a straight dislocation, as well as the force per unit length and the total force on a straight dislocation due to another straight dislocation. They differ from previous

expressions in the literature in that they are given completely in tensor or vector notation. They are limited to the case of a

linear, isotropic, infinite continuum.

9446. The self-energy of dislocation configurations made up of

straight segments, R. deWit, Phys. Stat. Sol. 20, 575-580 (Mar.

1967).

Key words: Continuum; crystal; defect; dislocation; energy;

interaction; isotropic; straight.

Three general expressions are presented: the first is the

interaction energy between two non-parallel straight dislocation

segments, the second is the interaction energy between two

parallel straight segments, and the third is the self-energy of a

straight segment. These can be used to determine the total energy of any dislocation configuration made up of piecewise

straight segments. They differ from previous expressions in the

literature primarily in that they are given completely in vector

notation and in that self-energy includes a core traction term. The expressions are limited to the case of a linear, isotropic,

infinite continuum. As an example, the formulas are applied to_ the case of a stacking-fault tetrahedron.

9447. Anomaly in Young's modulus and internal friction of

5SrTiO:r3La,/:,TiO:i below 100 "C, R.' W. Dickson, J. Am.

Ceram.Soc. 49, "No. 11,628 (Nov. 1966).

Key words: Internal friction; lanthanum titanate; phase

change; resonance; strontium titanate; vacancies; Young's

modulus.

A rapid decrease in Young's modulus with decreasing

temperature suggests that some type of phase change may occur

in 5SrTi03-3La2/3Ti03 near 80 °C despite the lack of evidence in x-ray patterns.

9448. Effects of packing pressures on the properties of spherical

alloy amalgams, G. T. Eden and R. M. Waterstrat, J. Am.

Dental Assoc. 74,No. 5, 1024-1029 (Apr. 1967).

Key words: Adaptability; amalgams; dental amalgam;

dentistry; mercury-silver alloys; packing pressure; particle

size; silver-tin alloys; spherical alloy; spherical-alloy

amalgam.

The properties of dental amalgams prepared from sphericalalloy particles are compared with the properties of amalgams

prepared from irregularly shaped conventional alloy particles.

The spherical-alloy amalgams were found to be as strong or stronger than the conventional amalgams and in addition the

spherical alloy amalgams possess a superior property of

"adapting" their shape to that of the cavity walls particularly

when they are condensed under low packing pressure. The

spherical alloy amalgams also are capable of retaining a greater

fraction of their strength at low packing pressures where the conventional amalgams lose their strengths rapidly.

The use of spherical-alloy amalgams offers the dentist superior

"adaptability" and better control over such variables as rate-of- hardening, setting expansion strength, carvability, mercury

content, etc., through a more effective control of alloy particle

size and shape.

9449. A broad-line proton magnetic resonance study of cobalt tetracarbonyl hydride, T. C. Farrar, F. E. Brinckman, T. D.

Coyle, A. Davison, and J. W. Faller, Inorg. Chem. 6, No. 1, 161-163 (Jan. 1967).

Key words: Bond length; broad-line; carbonyl; cobalt; cobalt tetracarbonyl hydride; hydride; nuclear magnetic

resonance; proton.

The broad-line proton magnetic resonance spectrum of cobalt tetracarbonyl hydride, HCo(CO)4, has been measured. The CoH bond distance is determined to be 1.2 A with an estimated

overall uncertainty of ±0.1 A. The use of the n.m.r. method for

structural investigation of polycrystalline solids is discussed.

9450. Proton broad-line n.m.r. study of [-He] 'imt ;hoxy["B]-

borane, T. C. Farrar, J. Cooper, and T. D. Coyle, Chem.

Commiin. 17, 610-611 (1966).

Key words: Bond lengths; boron; broad-line;

dimethoxyborane; hydride; nuclear magnetic resonance;

proton.

The broad-line proton magnetic resonance spectrum of

polycrystalline H"B(OCD.i)2 has been measured at 29.95 MHz

from the melting point to — 180 °C. The spectrum shows well- resolved fine structure arising from intramolecular dipolar

coupling of the hydridic hydrogen with the "B nucleus. The

boron-hydrogen distance is determined to be 1.25 A with a standard deviation of 0.05 A.

945 1 . Initial kinetic parameters from thermogravimetric rate and

conversion data, J. H. Flynn and L. A. Wall, J. Polymer Sci. Letters 5^,^0.1, 191-196 (Feb. 1967).

Key words: Energy of activation; initial kinetic parameters;

non-isothermal kinetics; polyethylene; polymer degradation; stability of polymers; thermogravimetry.

A new method for determining the initial activation energy for a volatilization process is developed from the limiting characteristics of rate versus conversion plots and a few simple

variants thereof. At low conversion, the energy of activation of Hnear polyethylene was E(0.003<C<0.025; 630 °K<T<680

°K)s36 kcal/mol, while a sample preheated at 200 °C in a vacuum for an hour gave E(0.003<C<0.04; 640 °K<T<685

°K)=60 kcal/mol.

9452. Development of performance standards, B. E. Foster,

Military Engr. 58,^0. 385, 335-336 (Sept.-Oct. 1966).

Key words: Accelerated tests; bathtubs; external wall units; innovation; long-time behavior; performance standards. The performance concept in building has been the subject of a

great deal of discussion and study during the past several years. When applied to materials and components, difficulties arise in devising performance-type tests which will predict the probable

life expectancy in a particular environment or application. A

brief discussion of two projects undertaken by the Building

Research Division of the National Bureau of Standards, one on

external wall units and the other on bathtubs, in which important

performance elements were identified, and performance-type

tests recommended for all properfies except those of anticipated

long-time behavior illustrates the problem. The general present

lack of satisfactory accelerated test procedures will require that for some time to come performance-type tests must be

supplemented by technical judgement rendered by experts

experienced in the properties of materials and their probable

interactions. 9453. Magnetic susceptibility of insulating and semiconducting

strontium titanate, H. P. R. Frederikse and G. A. Candela,

Phys. Rev. 147, No. 2,583-584 (July 15, 1966).

Key words: Bandstructure; insulator; magnetic

susceptibility; Pauli paramagnetism; semiconductor;

strontium titanate. The magnetic susceptibility of strontium titanate with and

without charge carriers has been measured at 300, 78, and 4.2 °K. Insulating SrTiOs shows a magnetic moment, which is partly

diamagnetic and partly (Van VIeck) paramagnetic. The free- carrier contribution is mainly paramagnetic because of the high

density of states. As the concentration of carriers is increased

90
the temperature dependence disappears. At the highest

concentration (—6 x iO^'Vcc), pure Pauli paramagnetism is observed- The density-of-states effective mass at the bottom of

the conduction band deduced from these measurements is 5m»,

in good agreement with values from transport experiments.

9454. Nucleation in polymers, F. Gornick and J. D. Hoffman,

Ind.Engr. C/u'w. 58, No. 2,41-53 (Feb. 1966).

Key words: Chain folding; crystal growth; crystallization

kinetics: homogeneous nucleation; interfacial energy:

nucleation: polychlorotrifluoroethylene: polyethylene;

polymers: surface free energy.

This article is a review of current theories and experimental

data on homogeneous nucleation and crystal growth with chain

folding in linear polymers.

9455. Determination of glycerol in paper, E. L. Graminski and B. W. Forshee, r«pp/49,No. 7, 324-326 (July 1966).

Key words: Animal glue; glucose; glycerol; mannitol;

melamine resin; paper; sucrose.

Glycerol in paper Ccin be determined by extraction with water and oxidation with sodium periodate in a slightly acidic medium.

The formic acid produced during the oxidation is a measure of

the glycerol present. Polyhydroxy alcohols and sugars having

three or more adjacent hydroxy groups also produce formic acid when oxidized with periodate. The presence of these materials can be ascertained by determining the molar ratio of periodate

consumed to the formic acid produced. If the molar ratio is less than 2: 1 or the formic acid produced after a 60-minute oxidation

is significantly higher than that produced after five minutes,

interfering material is present. Information concerning the chemical nature of the interfering material may be obtained from

the change in periodate/formic acid ratio between 5- and 60- minute oxidations.

9456. Inversion temperatures and pressures for cryogenic gases and their mixtures, R. D. Gunn, P. L. Chueh, and J. M.

Prausnitz, Cryogenics 6, No. 6, 324-329 (Dec. 1 966).

Key words: Corresponding states; cryogenic gases; generalized inversion curve; Joule-Thomson coefficient: mixtures.

A generalized Joule-Thomson inversion curve has been

obtained from volumetric data for gases with acentric factors less than 0.10. The curve is plotted in coordinates of reduced

pressure and reduced temperature and a deviation function is provided for gases which, because of quantum effects, do not conform to classical corresponding states behavior. Semiempirical mixing rules are recommended for calculating the inversion curve of gas mixtures. For two binary systems

(hydrogen-methane and helium-nitrogen) it was found that at constant temperature, a plot of inversion pressure versus mole

fraction goes through a strong maximum. Calculated results for mixtures compare favorably with the very limited experimental

data now available.

9457. The nucleation of Hg on W as observed by field-emission microscopy, S. C. Hardy, (Proc. Intern. Conf. Crystal Growth,

Boston, Mass., June 20-24, \966), Crystal Growth, a Suppl. to

J. Phys. Chem. Solids €13, 287-293 (Pergamon Press Inc., New York, N.Y., 1967).

Key words: Electron field emission: Hg on VV; nucleation. The nucleation of Hg from the vapor onto W has been studied

under ultra-high-vacuum conditions in a field-emission

microscope. A critical supersaturation for formation of nuclei is measured from 184 °K to 240 °K. Below 210 °K, the temperature dependence of the critical supersaturation data is

found to fit the model of disc-shaped critical nuclei with no

entropy of mixing contribution to their free energy of formation. At higher temperatures, the data indicate that nucleation occurs by the impingement of subcritical clusters.

9458. Avalanche radiation from the bulk of long, thin, forwardbiased p^-p-n* silicon diodes, G. G. Harman, Appl. Phys.

Letters 9, No. 5 , 207-209 (Sept. 1 , 1 966).

Key words; Hot electrons; silicon diodes; visible radiation. Avalanche radiation has been observed from the bulk of long,

thin, forward-biased p* -p-rt" silicon diodes with applied field strengths as low as 1000 V/cm. At higher fields, surface arc erosion streaks occurred and these followed crystallographic

plane directions rather than the applied field orientation. Possible explanations are given for the several effects that contribute to the observed phenomena.

9459. Estimate of extrinsic stacking-fault energies from

dislocation configurations, W. F. Hartl, R. deWit, and R. E. Howard, J. Appl. Phys. 38, No. 1,1-4 (Jan. 1967).

Key words: Dislocations; extrinsic faults; silver-tin alloy;

stackingfault energy.

In this paper we use straight-line models of observed extrinsic nodes to estimate extrinsic stacking-fault energies. Using

isotropic elasticity theory and neglecting interactions, we find simple expressions for the energy in terms of the inscribed radii of the nodes. We apply the results to observed extended nodes

in silver-8 at.% tin alloy and find a ratio of extrinsic to intrinsic stacking-fault energy of about 3.

9460. Dissociation constant of morpholinium ion and related thermodynamic quantities from 0 to 50°, H. B. Hetzer, R. G.

Bates, and R. A. Robinson, 7. Phys. Chem. 70, No. 9,2869-

2872 (Sept. 1966).

Key words: Bases: dissociation constant; emf

measurements; morpholine; morpholinium ion; thermodynamic quantities.

The thermodynamic dissociation constant of morpholinium

ion(MH+)at II temperatures from 0 to 50° has been determined

from emf measurements of hydrogen-silver chloride cells without liquid junction. The dissociation constant (Ka) for the process MH+ -H H.,O^M + H3O+ is given as a function of 7(°K)

by the equation - log A:„ = 1663.29/7 + 4.1724 - 0.00422397.

At 25°. - log Ka is 8.492, ^H° is 39,030 joules mole ', ^S° is — 3 1.7 joules deg-' mole and ACp° is 48 joules deg ' mole"'.

9461 . Solid-vapor equilibrium in the system neon-methane, M. J. Hiza and A. J. Kidnay, Cryogenics 6, No. 6, 348-354 (Dec.

1 966).

Key words: Low-temperature phase-equilibrium; methane;

minimum gas phase equilibrium concentration; neon; neon- methane binary system; solid-vapor equilibrium.

Gas phase compositions in the solid-vapor region for the neon- methane system were measured at eight integral temperatures

from 50 to 87 °K up to 100 atmospheres pressure. A flow system was used in which methane was evaporated into a stream of pure neon gas. The equilibrium methane content of the gas phase

leaving the equilibrium cell was analyzed continuously with a hydrogen flame-ionization detector. A comparison of these data

at 76 °K with data for the hydrogen-methane and heliummethane systems is made to show the relative non-ideality of the neon system. Theoretical calculations of the concentration

minima for this system are in poor agreement with experimental

values.

9462. Analysis of the a, f3, and y relaxations in polychlorotrifluoroethylene and polyethylene: dielectric and

91
mechanical properties, J. D. Hoffman, G. Williams, and E. Passaglia, y. Polymer Sci. Pt. C, No. 14, 173-235 (1966).

Key words: Annealing: chain fold: chain rotation; chain

twisting; defect: dielectric relaxation: mechanical

relaxation; polychlorotrifluoroethylene: polyethylene;

polymer; semicrystalline: vacancy.

Theoretical models for the Uc and relaxation effects found in chain-folded polymer crystals (single crystal mats and bulk) are presented, and compared with the available dielectric and mechanical loss data for polyethylene and polychlorotrifluoroethylene. Details of morphology and crystal structure that can be

varied by crystallization and annealing procedures, e.g., roughness of chain-folded surfaces, number of intercrystalline

links and cilia, number of chain-end defects and dislocations, and

the existence of the extended-chain phase, are brought into the discussion. The ac process, which consists of two overlapping

mechanisms, is a result of motions of chain folds, and

reorientation (with translation) of chains in the interior. (Chain

twisting also occurs for long chains. The theory connects the data on the /r-paraffins and their polar derivatives (n-ketones.

esters, ethers) with the results on polymers: the commonfeature

is the chain reorientation and twisting process. A new theory of chain twisting is introduced. The relaxation is a result of

reorientation of chains in a "loose" chain-end induced defect (a

vacancy row) in the polymer crystal. When the effect of chain

twisting is included, the theory successfully predicts the unusually broad and asymmetric loss curve found in the polymer, and is consistent with experimental activation energies.

The fi relaxation arising in the amorphous component of

PCTFE is analyzed, and its upward shift in temperature with

increasing crystallinity discussed in terms of the Adam-Gibbs

theory of relaxation in the glassy state- The ya amorphous

relaxation, and the 8 relaxation which is found at cryogenic

temperatures, are also discussed.

9463. Condensation of dry air on a liquid hydrogen cooled surface

in the pressure range 10"^ to 10 torn (Knudsen number of lO-" to

1),J. Hord,Co'ogert/cj6,No. 5,285-293 (Oct. 1966).

Key words: Air collector: air condensation: air sampling: air solidification at 20 °K: cryodeposit: cryodeposit surface temperature: cryopumping: cryopumping air at 20 °K in the

transition pressure regime; geysering; heat transfer to air condensing at 20 °K. The rate of condensation of dry air on a liquid hydrogen cooled

surface has been determined experimentally and compared with

analytical predictions. Free molecule flow theory appears adequate for high conductance systems at bulk air pressures up

to 1 0-' torr. At higher pressures this formulation predicts

condensation rates which are too large. Continuum bulk flow

theory and free molecule flow theory agree fairly well throughout

the pressure range investigated; however, bulk theory is more

compatible with experiment. Theoretical and experimental

condensation rates are presented as a function of air bulk

pressure and cryodeposit (solid air frost) surface temperature.

Surging (slug flow) of static liquid hydrogen refrigerant inside small bore tubes was experimentally observed and is presented

as a function of heat flux. The liquid hydrogen was vented to the atmosphere from a tube designed to provide 0.33 g acceleration

along the tube axis.

9464. Kinetics of solute-enhanced diffusion in dilute face- centered-cubic alloys, R. E. Howard and J. R. Manning, Ph\s. Rev. 154, No. 3.561-568 (Feb. 1967).

Key words: Correlation factors: diffusion; dilute alloys;

impurities; jump frequencies: solute atoms: vacancies.

A theory of the effect of solutes on solvent self-diffusion in dilute f.cc alloys is given based on the model of nearestneighbor interactions between solute impurities and vacancies.

The parameters of the theory are the four vacancy jump

frequencies in the neighborhood of an impurity and the vacancy

jump frequency in the pure crystal. No assumptions are made

about the relative magnitudes of these frequencies. This

distinguishes the present theory from previous theories based on

the same model. The theory is used to deduce for each of nine

dilute Ag-based alloys sets of jump frequency ratios (and

corresponding impurity correlation factors) that are consistent

with measured values of the solute enhancement coefficient and

of the impurity diffusion coefficient. The desirability of isotope

effect measurements to determine the impurity correlation

factors is emphasized.

9465. Moisture permeation of leather and plastics used in shoes,

J. R. Kanagy. J. Am. Leather Chemists' Assoc. Tech. Note

LXII,No. 2. 115-122 (Feb. 1967).

Key words: Absorption, water: adsorption, water vapor;

leather; permeation; water vapor permeability.

Data are given on moisture permeation of leather and plastics

exposed both to water and water vapor. The rate of moisture

permeation of some plastics is equivalent to that of some leather now used. The permeation of moisture through leather depends

upon the tannage, and by adopting the propser tannage could be

greatly increased. However, leathers that are highly permeable

to water are not practical for use in shoes, and in this respect

man-made materials will undoubtedly be able to compete with

leather. Other properties, such as insulation and ability to mold

to the feet, are characteristics which will continue to make

leather a preferred material for shoes.

9466. Note on the variation of the results of the Mullen burst test over the area of a hide, J. R. Kanagy, 7. ylw. Leather Chemists'

Assoc. Tech. NoreLXn,No. 1.63-67 (Jan. 1967).

Key words: Burst of leather: extension; grain-crack; Mullen

test.

Variation of the Mullen test results was determined over hide

by cutting the entire area into 3 by 3 inch pieces and testing each

of the specimens. Percentage stretch with increase in load was

determined, and the point at which grain-crack occurred was

noted. Grain-crack is prevalent in specimens from locations on

the butt of the hide. In this position stretch increases rapidly

with load because of the physical structure of the fibers. Ninety

percent of the specimens which cracked were from the small area

of the butt which constituted three to four square feet. The other

areas of a full-grown cattle hide were almost entirely free of

grain-crack when subjected to 600 pounds in the Mullen tester.

9467. Optical power increase in GaAs laser diodes coated with

reflecting aluminum silicone mixture, H. K. Kessler, Proc. IEEE Letter 55, No. 1 , 99-1 00 (Jan. 1967).

Key words: Aluminum-silicone compound; Ga.As lasers; heat sink; optical power.

GaAs laser output power has been increased by using the

reflectance of an aluminum-silicone mixture coated on a laser diode. After such application, the light output increased from

one side by 50 percent, and better heat dissipation from the diode was observed.

9468. Surface aspects of the thermal degradation of GaAs p-n

Junction lasers and tunnel diodes, H. Kessler and N. N.

Winogradoff, IEEE Trans. Electron. Devices Ed-13, No. 10, 688-691 (Oct. 1966).

Key words: Degradation: gallium arsenide: lasers: light

emission: surface effects: tunnel diodes. Owing to the similarity of the junction widths and doping

levels in epitaxially formed GaAs lasers and conventional tunnel

92
diodes, the gradual degradation of the latter under use might be

expected to be intensified in the case of lasers operating under

high duty cycle or CW conditions.

It was found that the current-voltage characteristics of both

the lasers and tunnel diodes underwent considerable thermal

degradation even when no bias was applied, and that the degradation was limited to surface or "junction edge" effects. The degradation of the current-voltage characteristic was

correlated with degradation in the light output under forward

bias. It was concluded that degradation under forward bias was

also a surface effect induced by heating rather than by

deterioration of the junction in the bulk, as commonly believed.

Methods of controlling the degradations are discussed.

9469. Ellipsometric-potentiostatic studies of iron passivity. I. Anodic film growtti in slightly basic solutions, J. Kruger and J. P. Calvert, y. Electrochem. Soc. 114, No. 1,43-49 (Jan. 1967).

Key words: Anodic oxidation; ellipsometry; iron: iron oxide

films: kinetics: passivity: potentiostat.

Cathodically reduced iron was anodically oxidized at potentials in the passive region of the anodic polarization curve

in slightly basic sodium borate-boric acid solutions by means of a

potentiostat. The kinetics of film growth were studied using an

ellipsometer coupled with a fast recording technique, which

enabled a determination of the rate of film formation for times

less than 1 sec. This study of the kinetics of film growth using a nonelectrochemical technique agreed with kinetic results based on total charge measurements. Three stages of growth were

detected: (1) First stage — growth limited by a diffusion process

in the solution: (2) Second stage — start of limitation of growth by

the film involving the combination of several processes difficult to characterize by any rate law; (3) Third stage — growth obeying

either a logarithmic or inverse logarithmic rate law. The latter was found to imply that the passive film consisted of an outer

layer poorly conductive for electrons.

9470. Pyroelectric effect in bone and tendon, S. B. Lang, Nature

212, No. 5063,704-705 (Nov. 12, 1966).

Key words: Bone; collagen; hydroxyapatite; piezoelectricity; pyroelectricity; tendon.

The pyroelectric coefficients (at constant stress) of one of the phalanges, the femur, and the hoof tendon of a cow were

measured. The coefficients, which ranged from 2.5 to 4. 1 x

10"'^ coulomb cm - °C ' over the temperature span, —35 to 60 °C, were the smallest yet measured in any material. The results indicate that the collagen of bone and tendon is responsible for both the piezoelectric and pyroelectric effects. The pyroelectric

effect in bone and tendon is probably too small to be of

physiological significance.

9471. Remote positioner for rotary switches, S. B. Lang and A. M. Gray.^ev. Sci. Instr. 37, No. 6, 799-801 (June 1966).

Key words: Remote positioner; rotary switches; vibratingreed electrometer. A remote positioner for rotary switches was designed for use on a vibrating-reed electrometer to provide automatic range

switching between two preselected levels. The positioner

consisted of a bi-directional rotary solenoid motor, driven by a

capacitor pulse-counter circuit (diode pump), and was controlled by three rotary switch decks. The "ositioner was mounted

external to the electrometer. The positioner can be used for automatic range switching on many types of electronic

apparatus.

9472. Kinetics of growth of multicomponent chains, J. L

Lauritzen, Jr., E. A. DiMarzio, and E. Passaglia, J. Chem.

Phys.45,'>io. 12,4444-4454 (Dec. 15, 1966).

Key words: Composition; growth rate; kinetics; multicomponent; steady-state.

A theory is presented by which the rate of growth and

composition (including all pair and higher distributions) of a

chain growing in a multicomponent system may be calculated. Each position in the chain may be occupied by any of the components of the system. Only nearest-neighbor interactions are assumed and the rate constants a'j for addition of Species j to a chain ending in Species /, and P'K for the removal of Species j

from a chain ending in ij are assumed known and independent of

chain length, except for those referring to the first step of the chain, which are distinct. The full kinetic equations for the growth of such chains are formulated and a solution obtained for steady-state conditions. It is shown that when the matrix of

a'j/P'j is indecomposable and primitive a solution of the equations which is independent of chain length always exists for

sufficiently long chains and computational methods for obtaining

this solution for a relatively large number of components (of the order of 1 0) are presented. In addifion, the relationship of a''lp'j to the energetics of the system is derived.

9473. Chlorine K;S x-ray emission spectra from several chlorinated hydrocarbon and fluorocarbon molecular gases, R.

E. LaVilla and R. D. Deslattes, J. Chem. Phys. 45, No. 9, 3446-3448 (Nov. 1, 1966).

Key words: Chlorinated molecular gases; chlorine; K/J x- ray emission.

Emission profiles have been obtained in x-ray fluorescence for the four chlorinated derivatives of methane (CH3C/, GH2C/2,

CHC/3, CC/4), and five chlorinated fluoromethanes (CF3C/,

CF2C/2, CFC/3, CHFC/2, CHF2C/) in the gas phase. The

chloromethanes contain two prominent lines whereas the chlorofluoromethanes have multiplet structures up to four lines. These structures are interpreted in terms of the molecular orbital determined final state hole energies.

9474. Electronic data processing in urban tranportation planning,

B. M. Levin and R. E. Schoefer, (Proc. Second Annual

Conference on Applications of E.D.P. Systems for State and

Local Government, Apr. 1-2, 1966, New York, N.Y.), BooA', The Large-Scale Public E.D.P. System: Its Problems and

Prospects, pp. 169-177 (University of New York, N.Y.,

1966).

Key words; Data processing; systems analysis;

transportation planning; urban transportation.

The goal of urban transportation planning is to develop a plan

for an efficient, balanced transportation system for an urban area— one which will promote a desirable pattern of human

activities. While the process has been standardized to some

extent, each study must nevertheless acquire and manage a massive amount of information about the particular region with

which it is concerned. From this information, models which can

be used to predict future land use patterns, travel demands, and

the workings of the transportation system are developed and

calibrated. Using computerized versions of these models,

transportation planners have the capability to propose and test a

large variety of future transportation systems, so that one which

is well-suited to the future needs of the urban area can be found.

9475. Structural interpretation of immiscibility in oxide systems.

IV. Occurrence, extent, and temperature of the monotectic, E. M. Levin J.Am. Ceram.Soc. 50, No. 1,29-38 (Jan. 1967).

Key words: Borates; glassformers; immiscibility; liquid

immiscibility; modifiers, network; oxide systems; silicates.

Liquid immiscibility data in known binary oxide systems are analyzed in relation to three fundamental aspects. Occurrence of

immiscibility in glassforming systems is related to differences in

93
ionic field strengths or electrostatic bond strengths between the network cation with oxygen and the modifier cation with oxygen.

If this difference is either too small or too large, immiscibility

will not be present. Analysis also indicates that immiscibility is not to be expected in binary phosphate and vanadia systems. Factors governing the extent of immiscibility are essentially

unrelated to its occurrence; and in borate and silicate systems,

immiscibility is inversely correlated with the number of oxygens

per modifier cation in the modifier rich liquid. Temperature of

the monotectic almost always lies between the melting point of

the glassformer and the first compound beyond the immiscibility

gap. Properties of the monotectic. such as. the primary phase

under the two liquids and location of the eutectic, are fixed

according to whether the monotectic temperature is above or below the m. pt. of the glassformer. Principles of immiscibility

are summarized.

9476. The system SC2O3-B2O3, E. M. Levin. 7. Am. Ceram. Soc.

50, No. 1.53-54 (Jan. 1967).

Key words: Boric oxide: liquid immiscibility: oxide

systems: phase diagram: scandium oxide.

The phase diagram of the system SC2O3-B2O3 has been

determined experimentally, by the "quenching" technique. The

system is characterized by a single binary compound. SCBO3.

melting congruently at 1610 °C and by a region of liquid

immiscibility extending at 1526 °C from almost pure B2O3 to 34.0 mol.% SC2O3. Immiscibility from qualitative and

quantitative standpoints is consistent with the previously

elucidated structural interpretation of immiscibility.

9477. Analysis of lanolin in soap, F. J. Linnig, Soap Chem.

Specialties XVLL, No. 7, 55-57 (July 1 966).

Key words: Borax: ion-exchange resin: lanolin, soap. A new method has been developed for the determination of

lanolin in lanolin-borax-soap mixtures. \ mixed cation-anion

exchange resin is used to remove the soap and borax from an aqueous solution of the whole sample. The resin is separated by

filtration and washed with an organic solvent to remove lanolin. The solvents are evaporated, and the residue weighed as lanolin. This procedure is simpler and more rapid than the present

method, and should be more accurate.

9478. Embrittlement of high strength AISI 4340 steel in boiling

NaCl solution, H. L. Logan and J. M. Wehrung. Corrosion 22,

No. 9. 265-269 (Sept. 1966).

Key words: Boiling sodium chloride solution: delayed

failure: high strength steel; hydrogen diffusion; hydrogen

embrittlement: internal initiation; stress corrosion.

The resistance of high strength AISI 4340 steel tubing,

quenched in oil and tempered to 425 °F. to corrosive media has

been investigated. The exterior surface of the specimen was

exposed to boiling NaCl. the interior cavity was evacuated, and

the specimen was subjected to a tensile stress. Specimens failed,

with little evidence that cracking was developing, after several hours exposure and after hydrogen had penetrated through the specimen wall. The appearance of the initial fracture and its mode of development indicate that it originated within the specimen wall. The data indicate that failure resulted from

hydrogen embrittlement.

9479. Stress-corrosion cracking of cold-reduced austenitic

stainless steels, H. L. Logan and M. J. McBee, Mater. Res. Std.

7, No. 4, 137-145 (Apr. 1967).

Key words: Atmospheric corrosion tests: chemical attack: cold working: corrosion; cracking; stainless steels: steels: stress corrosion.

The effects of specimen orientation with respect to the direction of rolling or prior rolling on the susceptibility to stress- corrosion cracking in a boiling MgCU solution were determined

for both annealed and cold-reduced types 301 . 304. 3 1 0. and 321

stainless steels. Threshold stresses for the most susceptible

orientations were determined in a boiling 0.5 N NaCl, 0.1 N

NaN02 solution to be 60 to 110 percent of the yield strengths of

the materials. None of the steels cracked in a marine atmosphere

during 15 months" exposure stressed at 90 percent of their yield

strengths. The effects on the threshold stresses of varying

amounts of cold work differed from steel to steel and are reported. The effects of internal stress patterns and welding were also investigated for some of these steels and are described.

9480. Phase relations between Cr203 and Ir02 in air, C. L. McDaniel and S. J. Schneider. J. Am. Ceram. Soc. 49, No. 5. 285-286 (May 1966).

Key words: Cr203-Ir02 system: dissociation; phase

relations: platinum metal oxides; solid solution. A study has been made by X-ray diffraction analysis of the reactions that occur in an air environment between Cr-iOs and Ir or Ir02. In air Ir oxidizes at low temperatures to form Ir02

which in turn dissociates at 1020 °C. The pseudobinary system

CroOs-IrOi contains a quasi-solid solution region existing from

100 mole 9c IrO-i to approximately 21 mole % Cr-Oj with a maximum dissociation temperature at 1040 °C. Up to at least 2 1 00 °C no reaction occurred between CraOs and Ir.

9481. Emission spectrometry, M. Margoshes and B. F. Scribner,

Anal. Chem. 38,No. 5. 297R-3 1 OR (Apr. 1966).

Key words: Atomic absorption spectrometry; atomic

emission spectrometry: atomic fluorescence spectrometry;

flame photometry; spectroscopy.

The literature of analytical interest in atomic emission

spectrometry, flame photometry, and atomic absorption

spectrometry is reviewed for the years 1964-65. The topics

included are books and reviews, spectral descriptions and

classifications, instrumentation, excitation, standards, cali- bration, and analytical applications. Literature citations total 351.

9482. Chemical substructure searching with linear notations, B. A. Marron. G. R. Boltosky. and S. J. Tauber.V. Chem. Doc. 6, 92-95 (May 1966).

Key words: Chemical: computers; Hayward notation; information retrieval: linear notation: structures; substructure searches. An experimental computer system was developed that performs chemical structure and substructure searches directly on linear notations.

9483. Comments on "Nature of the critical nucleus in heterogeneous vapor-solid nucleation", A. J. Melmed and S. C. Hardy, ^//r/ace^d. 6, No. 4.481-482 (April 1967).

Key words: Critical nucleus: field-electron emission

microscopy: heterogeneous nucleation; vapor deposition.

It is shown that a recent field-electron-emission microscope

experiment was significantly misinterpreted and that, therefore,

the conclusions cannot be considered meaningful.

9484. The structure of field-evaporated hexagonal close-packed

metal surfaces: rhenium and ruthenium, A. J. Melmed. Surface

5d. 5, No. 3, 359-379 (Nov. 1966).

Key words: Field evaporation: field ion microscopy: hep

metals: surface structure.

Field-ion micrographs of field-evaporated ruthenium are analyzed and compared with similar micrographs of rhenium.

94
Certain surface topological features appearing in Ru at 2 1 °K and

77 °K do not appear in Re at these same temperatures, although

the metals are both hep. The Ru field-evaporated surface clearly

develops an exposed A, B, A, B, ... sequence, giving half the number of distinguishable net plane edges, in the same

crystallographic regions. The difference is discussed in terms of

geometric and electronic factors which influence the field evaporation process.

9485. Determination of the composition of complexes and their

instability constant by calorimetry. II. The complex in fused potassium chloride and cadmium chloride, W. H. Metzger, Jr., A. Brenner, and H. I. Salmon, 7. Electrochem. Soc. 114, No.

2, l31-138(Feb. 1967).

Key words: Calorimeter; calorimetry; complex ion; enthalpy determination; KCl-CdCla system: molten salts. A new method of determining the composition of complexes in solution and their equilibrium constant has been developed

which is based on the determination of the partial molal heat

effect developed when a small increment of each salt is added in turn to a series of mixtures covering the whole range of

composition. The method was applied to the molten KCl-CdCl2

system which was shown to contain the 1 : 1 complex with an

instability constant of 0.32 at a temperature of 600 °C and 780

°C. A calorimeter was developed which permitted the addition

of the increments of salt to the molten mixture while the latter was continually stirred.

9486. Analyzing Uquid H2 with NMR, C. E. Miller, W. J. Alspach, and T. M. Flynn, Cryogenic Engi: News 1, No. 8, 66

(June 1966).

Key words: Analyzer: cryogenics; hydrogen; instrument;

instrumentation: liquefier; liquid hydrogen; measurement;

nuclear spin relaxation time; ortho-para; relaxation time; Ti. The nuclear spin relaxation time (TO of liquid hydrogen is shown as a function of the ortho-para composition of the fluid. A

scheme is suggested whereby an ortho-para analyzer might be

made which depends upon this fact. Such an instrument would

have fast response, not depend on a reference gas, and be useful under flowing (dynamic) conditions.

9487. Fracture topography of brittle polymers, S. B. Newman,

Polymer Engr.Sci. 5,No. 3, 159-165 (July 1965).

Key words: Brittle polymers; fracture topography; kinetics; polymeric solids; primary fracture front; topography.

Fracture surfaces record the kinetics of failure at two levels in the structure of polymeric solids. The first is evidenced by the formation of geometric markings resulting from the interacfion of

the primary fracture front with secondary fractures developing

radially just ahead of the primary fracture. These markings are often visible to the unaided eye and have minimal dimensions in the micron range. The second fracture phenomenon appears to involve the orientation of molecular chains or bundles. Such

orientation manifests itself in the interference-color producing

film found on the fracture surfaces of poly(methylmethacrylate)

and polystyrene. It is also apparent in the free or adherent film found on the surfaces of large fractured crazes. Some evidence

is presented for the existence in these films of chain bundles 30A

or less in diameter. Similar mechanisms are apparently operating

in the production of "craze matter" and of fracture surface films.

9488. Reflection of soft x-rays by organic fibers, S. B. Newman,

J.Appl. PolymerSci. 10,No. 12, 1929-1935 (1966).

Key words: Fibers; microfocus tubes; microradiography;

nylon; polyacrylonitrile; polyamides; reflection of x-rays;

soft x-rays; x-rays.

An artifact observed in point projection microradiographs of

polymeric fibers and filaments obtained with 8 A x-rays is recorded and described. The phenomenon has been related to fiber-beam geometry and the high reflection efficiency of soft x- rays for these materials.

9489. Kinetics and statistics of structural changes in polyacrylonitrile, K. Noh and H. Yu, J. Polymer Sci. Letters 4B, No. 1 0. 72 1 -726 (Oct. 1 966).

Key words: Cyanide groups; initiation; isolation; naphthylidiene ring; polyacrylonitrile; propagation.

The structural changes attending the heat treatment of

polyacrylonitrile at 1 70 °C~220 °C were analyzed on the basis of

the naphthylidiene type ring formation. The kinetics of the ring

formation was found to be first order with respect to cyanide

groups along the polymer chain. About 20% of the cyanide

groups remain unreacted irrespective of the heating temperature.

The observed first order kinetics is consistent with the statistical analysis of the ring formation mechanism which is well established in the literature.

9490. Galvanic pitting in metallic coatings, F. Ogburn and M.

Schlissel,P/flr/>(^?54,No. 1,54-62 (Jan. 1967).

Key words: Corrosion; corrosion currents; electroplating;

galvanic corrosion; pitting; pitting corrosion.

An electrolytic cell is described which simulates a corrosion

pit extending through a metal coating and permits measurement

of the cell currents. Such cells were used to investigate the galvanic currents between coatings of chromium, copper, and

nickel and substrates of zinc, iron, nickel, and copper. The

investigation included outdoor salt spray and corrodkote

exposures; and determinations of the effects of anode size, depth

of electrolyte, and proximity of a second anode on cell currents. An equation for the cell current as a function of the cell parameters is discussed and compared with experiments.

9491. Flow properties of aqueous suspensions containing kaolins

of varying degrees of crystallinity, W. C. Ormsby and J. H. Marcus J. Am. Ceram. Soc. 50, No. 4, 190-195 (Apr. 1967).

Key words: Cation exchange capacity; cone-plate

viscometer; crystallinity; flow properties; kaolins; surface

area. A study was made of the influence which varying degrees of

crystal perfection of several Georgia kaolins had on the flow

properties of aqueous systems containing these clays. The

fractionated clay samples were characterized with respect to clay mineral composition, crystallinity, surface area, and cation

exchange capacity. A recording Ferranti cone-plate viscometer

equipped with truncated cones was used to examine the clay- water mixtures under a variety of experimental conditions.

Emphasis was placed on high shear-rate measurements of

systems of intermediate water content. A comparison of results for bulk samples and fine particle-size fractions of different clays showed a general qualitative

correlation between viscosity (or consistency) and degree of

crystallinity. In these samples, which were usually pseudoplastic, the viscosity tended to increase with decrease in crystallinity. Coarse particle-size fractions of the various clays

exhibited essentially Newtonian behavior while samples of

intermediate particle size and relatively good crystallinity

exhibited dilatancy. The extent of dilatancy was usually a function of the degree of crystallinity.

The viscosity of the fine particle-size fractions of a single,

well-crystallized clay, which exhibited an apparent increase in crystallinity with decrease in particle size, increased as the

particle size decreased. This correlation between viscosity and

95
particle size was also noted for the fine fractions of a poorly

crystallized clay in which the crystallinity was essentially

independent of the particle size.

In general, results indicated that dilatant and associated

properties were controlled by the degree of crystal perfection

whereas the viscous and plastic properties, at a given water

content, were generally dependent upon the particle size.

9492. Dissociation of acetic acid-c/j in deuterium oxide from 5 to 50° and related isotope effects, M. Paabo, R. G. Bates, and R. A. Robinson. y. Phys. Chem. 70, 2073-2077 (1 966).

Key words: Acetic acid-Ji; acid-base: deuterium oxide;

dissociation constants: emf: ionization; isotope effects: thermodynamics; weak electrolytes.

The dissociation constant of acetic acid-c^4 (CD3COOD) in deuterium oxide (D2O) has been determined by the emf method

at ten temperatures from 5 to 50°. From the variation of the dissociation constant with temperature, the changes of enthalpy,

entropy, and heat capacity have been derived. The four

dissociation processes, namely those for ordinary acetic acid in ordinary water, for deuterioacetic acid in ordinary water, and for these two acids in deuterium oxide, are compared.

9493. Dissociation of 4-aminopyridinium ion in 50 weight percent

methanol — water and related acidity functions from 1 0° to 40 °C,

M. Paabo, R. A. Robinson, and R. G. Bates. /4/2«/. Chem. 38,

No. 11. 1573-1575 (Oct. 1966).

Key words: Acid-base equilibria; aminopyridine;

dissociation constant; electrolytic dissociation; methanol- water solvents; thermodynamics.

The dissociation constant of 4-aminopyridinium ion in 50

wt.% methanol-water has been determined by the electromotive

force method from 10° to 40 °C. The pK value at 25 °C is 8.520

compared with 9.114 in water. The changes in free energy,

enthalpy, and entropy in the dissociation process have been

calculated. Values of p{aH7c,) and pa/y* are given for buffer

solutions containing equimolal amounts of 4-aminopyridine and

its hydrochloride.

9494. Bonding porcelain teeth to acrylic resin denture bases, G.

C. Paffenbarger, W. T. Sweeney, and R. L. Bowen. 7. Am.

DentalAssoc. 74, 1018-1023 (Apr. 1967).

Key words: Bonding; coupling agent: denture: plastic;

porcelain adhesion; resin; silane: teeth. The chemical bonding of porcelain teeth to both cold- and

heat-curing denture bases of acrylic resins was accomplished by

the use of a silane coupling agent, gamma-methacryloxypropyltrimethoxysilane. In tension the procelain-resin interface did not rupture — invariably the teeth did. Untreated teeth showed no

measurable bonding to the resin. Because of a lack of adhesion

between porcelain teeth and acrylic resins the design of most

current porcelain teeth provide for mechanical locking using

metal pins or undercut wells and canals (diatoric form). These

designs weaken the teeth unduly and can be eliminated by the use of a solid tooth which has been treated with an appropriate

silane. The bonding strengthens the denture since it makes the

effective cross-sectional area greater and prevents seepage

between the tooth and the plastic and so aids oral hygiene and

esthetics.

9495. Recent advances in U.S.A. research on dental amalgams

and possible applications, G. C. Paffenbarger. //ire//;. DentalJ.

16, No. 4, 450-465 (Dec. 1 966).

Key words: Amalgam; dental: research.

Current research on dental amalgam in the United States is developing information regarding the extrusion of amalgam

restorations from cavities; the desirability of low mercury-toalloy ratios; the design of universal technics for mixing and

compacting; the effect of residual mercury content: the relation among compressive, tensile and transverse strengths; the phases

present in the hardened amalgam; corrosion; and the advantages

of amalgam made from spherical alloy powder.

9496. Growth of calcium molybdate crystals by a temperaturegradient zone-melting technique, H. S. Parker and W. S. Brower, (Proc. Intern. Conf. Crystal Growth, Boston, Mass.,

June 20-24, 1966). Crystal Growth, a Suppl. to J. Phys. Chem.

Solids E-12, 489-491 (Pergamon Press Inc., New York.N.Y.,

1967).

Key words: Calcium molybdate: crystal growth; lithium

sulfate: single crystals; temperature gradient zone melting;

traveling solvent.

Calcium molybdate crystals were grown using the temperature

gradient zone melting technique. Lithium sulfate was used as flux and growth temperatures were in the 830-960 °C

temperature range. Initial zone thicknesses ranged from about

1.3x1 0"^ cm to 7.0 x 1 0~- cm, and regrowths of from 0.4 to 1 .2 mm were obtained during heatings of 48-96 hours.

9497. Galvanic corrosion of metals in cementing materials, J. W.

?\XXs. Military Engr. 59, No. 387, 40-41 (Jan.-Feb. 1967).

Key words: Aluminum conduit; calcium chloride; concrete; corrosion in concrete; corrosion in plaster; dissimilar metals; galvanic corrosion: gypsum plaster.

A brief discussion is presented of some corrosion problems

that have developed in recent years resulting from the use of

dissimilar metals embedded in portland cement concrete and

gypsum plaster. It is shown how dissimilar metals embedded in such cementing materials can form short-circuited galvanic cells and how corrosion of the anodes has led to failures of both steel- reinforced concrete containing aluminum conduit and of gypsum

plaster-metal lath systems in which copper tubing was

embedded. Examples of failures are cited. Some of the variables

that affect the degree of corrosion are discussed and some

general precautionary measures are recommended.

9498. Thermal insulation in buildings, F. J. Powell, Military

58, No. 38, 275-276 (July-Aug. 1966).

Key words: Indoor thermal environment: insulated

construction: insulation research; thermal building design;

thermal insulation; thermal performance standards. The role of thermal insulation in the design of a building is presented from the viewpoint of the engineer. Presently used

design procedures and other limitations, environmental and

applications factors that influence the performance of a thermal

design and some current research problems that involve

insulated constructions are discussed. The benefits from the use

of thermal insulation and their importance to a nation are given.

9499. The crystal and molecular structure of dichloro(l,10-

phenanthroiine)zinc, C. W. Reimann, S. Block, and A. Perloff,

Inorg. Chem. 5, No. 7, 1 1 85-1 1 89 (July 1 966).

Key words: Crystal structure; dichloro(l .10-phenanthroline) zinc; molecular structure; tetrahedral.

Crystals of dichloro(l,10-phenanthroline)zinc are monoclinic

with four molecules in a unit cell of dimension a = 9.73, b =

15.67, c = 7.97 A, ^ = 101° 5'. space group P2i/n. Threedimensional data were used, and the structure was solved as a heavy-atom problem. The coordination about the zinc atom is distorted tetrahedral. The 1 .10-phenanthroline molecule itself is essentially planar, and the zinc atom departs 0.13 A from this plane. The chlorine atoms are nearly equidistant from the zinc

96
atom. The plane of the zinc and two chlorine atoms makes an

angle of 79° with the plane of the 1 ,10-phenanthroline molecule.

9500. Study suggests value of shared computers, A. E. Rikli, S. I. Allen, and S. N. Alexander, Mod. Hosp. 106, No. 5, 100-108

(May 1966).

Key words: Administration; hospital data communications:

laboratory; nursing station; pharmacy; real-time hospital

information system; remote data input.

A survey of real-time hospital information systems in advanced stages of development has been made and is reported

briefly here. By definition, such a system is one that is in direct communication with portions of the hospital environment by

receiving data, processing transactions, and returning results with sufficient responsiveness to affect patient care and

administrative decisions near the time of occurrence of medical

or hospital events. Eight hospitals qualified under the definition,

and the general conclusion to be drawn is that more design

studies and experimentation with equipment and techniques are

essential to solving the special communications and information

problems of hospitals.

9501. Dislocation node determinations of the stacking-fault energy

in silver-tin alloys, A. W. Ruff, Jr. and L. K. \\&%,Acta. Met.

15, 189-198 (Feb. 1967).

Key words: Dislocations; electron microscopy; silver-tin alloy; stacking-fault energy.

Direct measurements by transmission electron microscopy on

extended dislocation nodes in alloys of tin in silver have led to values for the intrinsic stacking-fault energy. The values

decreased smoothly from 23 erg/cm^ for pure silver to 4.5 erg/cm^ for 7.8 at.% tin, near the f.c.c. phase limit. The results are compared with previous determinations in other silver-base

alloys, and sources of systematic error are discussed. A

comparison of different theoretical analyses is included.

9502. The stacking-fault energy in a-silver-tin alloys, A. W. Ruff,

Jr. and L. K. Ives, Canadian J. Phys. 45, 787-795 (1967).

Key words: Dislocation nodes; dislocations; electron microscopy; silver-tin alloys; stacking-fault energy; stacking

faults.

Direct measurements by transmission electron microscopy on

extended dislocation nodes in alloys of tin in silver have led to values for the intrinsic stacking-fault energy. The values

decreased smoothly from 23 erg/cm^ for pure silver to 4.2 erg/cm^ for 7.8 at.% tin. The results are compared with previous

determinations in other silver-base alloys.

9503. Low-frequency motions and barrier to rotation in phosphonium iodide, J. J. Rush, J. Chem. Phys. 44, No. 4,

1722-1723 (Feb. 15, 1966).

Key words: Barrier to rotation; electrostatic model;

inelastic neutron scattering; phosphonium iodide (PHjI).

The vibrational spectrum of PH4I has been investigated by the energy-gain scattering of cold neutrons (E„ ^ 5 meV). Three

distinct inelastic-scattering maxima are observed at energy gains

corresponding to 1 10, 335, and 614 cm-'. The 335 and 614 cm-'

peaks are attributed to the torsional oscillations of the PH4+ ion

and the 1 10 cm-' peak to the translational optic vibrations. The

barrier to rotation for the torsional mode of 335 cm-' was

computed to be 7. 1±0.5 kcal/mole based on the observed energy

of the peak. This agrees well with the value of 7.5 kcal/mole

derived from an electrostatic model.

9504. Motions of water molecules in potassium ferrocyanide

trihydrate, water, and ice: a neutron scattering study, J.J. Rush

,

P. S. Leung, andT. I. Taylor,^. Chem. P/zy*. 45, No. 4, 1312-

1317 (Aug. 15, 1966).

Key words: Ferroelectrics; ^H20; ice; inelastic scattering;

K4Fe(CN)6 • 3H2O; librations; low-frequency modes;

neutron cross-sections; neutron spectra; phase transition. The motions of H2O molecules in ferroelectric potassium

ferrocyanide trihydrate, water, and ice have been investigated by

total cross section and differential inelastic scattering

measurements with cold neutrons. The results show no

significant change in the average rotational or translational freedom of the water molecules in KFCT at or near its ferroelectric transition. The inelastic neutron spectra for KFCT

exhibit broad peaks at about 425 and 160 cm-', both above and

below the transition, which are assigned primarily to the

librational and optic translational modes of the H2O molecules,

respectively. Moreover, both the total cross section and

inelastic scattering results indicate a greater freedom of motion

of the H2O molecules in the KFCT lattice than in either water or

ice. In addition, a decrease in the total cross section of H2O, and

in its variation with neutron wavelength is observed at the waterice transition, indicating a significant change in the frequency

distribution. The neutron results are compared with the results of NMR and infrared measurements.

9505. Neutron-scattering study of the motions of water molecules

in hydrated salts of transition metals, J. J. Rush, J. R. Ferraro,

and A. Walker, Inorg. Chem. 6, No. 2, 346-351 (Feb. 1967).

Key words: Cold neutrons; coordination; hydrated salts; hydrates; hydrogen-bonding; neutron scattering; vibration

spectra; water librations. The low-frequency motions of water molecules in a series of

hydrated transition metal salts have been investigated by the energy-gain scattering of cold neutrons. The compounds studied

include CUSO4 H2O, CuSOj • 5H2O, Co(N03)2 • 2H2O,

Co(N03)2-6H20, Cu(NO.02 • 3H2O, and U02(NO;,)2 • 6H2O.

Broad bands observed in the spectra at neutron energy gains of

500-800 cm ' are assigned to the wagging and rocking modes of

the coordinated and hydrogen-bonded water molecules. Bands

around 400-500 cm-' are attributed both to M-OH2 stretching

modes and to the H2O torsional vibrations around the bisectrix. Maxima are also observed at energy transfers below 300 cm"',

which are tentatively assigned to hydrogen-bond stretching

vibrations and possibly to H2O-M-OH2 deformation modes.

Comparison of the various spectra appears to indicate that the average strength of binding of the water molecules does not change significantly in proceeding from the higher to the lower

hydrates. The neutron results are compared in detail to previous

infrared and structure results.

9506. Vibration spectra of yttrium and uranium hydrides by the

inelastic scattering of cold neutrons, J. J. Rush, H. E. Flotow,

D. W. Connor, and C. L. Thaper,y. Chem. Phys. 45, No. 10, 3817-3825 (Nov. 15,1966).

Key words: Cold neutrons; frequency; inelastic scattering;

metal hydrides; neutron scattering; optical vibration; vibration spectrum.

The vibration spectra of the hydrides and deuterides of yttrium

and uranium have been investigated by the energy-gain

scattering of cold neutrons. The measured spectra are all split into two bands, one at higher energies, due to the optical

hydrogen vibrations, and another at lower energies due to metal- atom vibrations. Values have been obtained for the peaks and

widths of the single optical hydrogen bands in YH2, YD2, UH3,

and UD3 by the calculation of approximate frequency

distributions from the observed neutron time-of-flight spectra.

The derived peak frequencies in cm-' are: YH2, 1025±60; YD2,

725±40; UH3, 970+60; UD3, 710+40. The relative width at

97
half-maximum for the hydrogen band in UH3 is about double that for YH2. The distribution of hydrogen vibrations in hexagonal

YH3 and YD3 is considerably broader, and exhibits several maxima, due to hydrogens at different sites in the lattice. The

hydrogen modes in all the compounds can be correlated reasonably well with the known crystal structures. The results are in satisfactory agreement with hydrogen frequencies

calculated previously from heat-capacity data.

9507. Unassigned.

9508. On the solution of the stefan problem for whisker growth, J. A. Simmons, H. Oser, and S. R. Coriell, (Proc. Intern. Conf

Crystal Growth, Boston, Mass., June 20-24, 1966), Crystal

Growth, a Suppl. to J. Phys. Cliem. Solids C8, 255-264

(Pergamon Press Inc., New York, N. Y., 1 967).

Key words: Curtis approximation; Dittmar-Neumann

approximation; mean stay time; stefan problem; surface concentration; surface self-diffusion; whisker growth.

An integral equation which describes whisker length as a

function of time is derived from the implicit exact solution of

Simmons, Howard, and Parker using a conservation principle. A

convergent iterative method is employed to obtain numerically

the exact growth curves and concentration profiles. Utilizing a dimensionless formulation, growth curves are shown to comprise

(except for a short transient period) a one-parameter family

dependent only on a dimensionless evaporation parameter. The

Dittmar-Neumann and Curtis approximations are compared

with the exact solution and are found to deviate significantly in some parts of the growth range; however, in those parts of the growth range where physical limits on the surface concentration

are satisfied, both approximations are in good agreement with

the exact solution. Methods and limitations are discussed for calculating the coefficient of surface self-diffusion and mean stay

time from whisker growth data.

9509. Measurement of optical constants: optical constants of

liquid mercury at 5461 A, L. E. Smith and R. R. Stromberg,y.

Opt. Soc. Am. 56,No. 1 1

, 1 539-1 542 (Nov. 1966).

Key words: Complex refractive index; ellipsometry;

mercury; optical constants; refractive index; surface films. The optical constants of liquid mercury have been measured

by ellipsometry at a wavelength of 5461 A. Discrepancies

among values from the literature are discussed and the magnitude of the important sources of error are evaluated. The

effects on the measured index of several different types of

surface films between the mercury and several contact media

have been calculated and compared. Errors in alignment are shown to cause large changes in the measured refractive index as well as an apparent dependence upon the angle of incidence.

9510. Relation between refractive index and density of glasses

resulting from annealing compared with corresponding relation resulting from compression, S. Spinner and R. M. Waxier,

Appl. Op/. 5, No. 12, 1887-1 889 (Dec. 1966).

Key words: Annealing; density; glass; hydrostatic

compression; polarizability; refractive index.

The change in refractive index and associated change in density of glasses on annealing has been determined by Tool,

Tilton and Saunders. The corresponding changes for the same

glasses, produced by hydrostatic compression, are presented

here and compared with those of Tool, Tilton and Saunders. It is found that for a given increase in density on annealing the increase in index is greater than for the same measured increase

in density on compression.

The results are interpreted in terms of equations developed by

Lorentz-Lorenz, Pockels, and Mueller to show first, that in all

cases, whether from annealing or compression, there is a decrease in polarizability on increase in density (these results are

in agreement with those of previous investigators); and second,

that the decrease in polarizability for a given increase in density (

is greater on compression than on annealing.

95 1 1 . Elastic properties of NiTi as a function of temperature, S. Spinner and A. G. Rozner, J. Acoust. Soc. Am. 40, No. 5, 1009-1015 (Nov. 1966).

Key words: Annealed specimens; cold-worked specimens;

elastic moduli; internal friction; nickel-titanium alloy;

temperature dependence.

Young's modulus, shear modulus, and internal friction of the

intermetallic compound NiTi have been measured as a function

of temperature from about — 1 80° to 600 °C, in the kilocycle-persecond range. Annealed and cold-worked specimens were used.

All the specimens showed the same general pattern, with a minimum in elastic moduli occurring about 70°-140 °C,

depending upon the particular specimen, and a maximum in internal friction occurring some 50 °C below the minimum in elastic modulus. Young's modulus was the same for all the specimens (694 kbar) within experimental error, but the shear

modulus of the cold-worked specimens was more than 10%

higher than that for the annealed specimens.

9512. Interactions in aqueous nonelectrolyte solutions. I. Solutesolvent equilibria, R. H. Stokes and R. A. Robinson, J. Phys.

Chem. 70,2126-2131 (1966).

Key words: Hydration; mixed solutions; nonelectrolytes;

solvation; sucrose solutions.

Solutes which interact with the solvent by a series of solvation

equilibria to form species which mix according to the ideal solution law are considered. General expressions relating the solvent activity to the molality and the equilibrium constants are

given. Sucrose solutions can be described with considerable

accuracy by the assumption of a number of possible solvation

sites equal to the number of oxygen atoms in the solute molecule,

with a single equilibrium constant given the same value for each

site.Mixed solutions of several solutes conforming to this model

are shown to obey very simple equations relating the molalities

at isopiestic equilibrium between solutions of the separate and

mixed solutes. A similar relation between the activity coefficients is given. Examples of systems which conform to these mixture relations are given, and it is suggested that cases of

large departures from the relations may be taken as evidence of

specific solute-solute interactions.

95 1 3. Thermal correction and crystal growth in horizontal boats,

flow pattern, velocity measurement, and solute distribution, H.

P. Utech, W. S. Brower, and J. G. Early, (Proc. Intern. Conf

Crystal Growth, Boston, Mass., June 20-24, 1966), Crystal

Growth, a Suppl. to J. Phys. Chem. Solids B29, 201-205

(Pergamon Press Inc., New York, N.Y., 1 967).

Key words: Crystal growth; fused sahs; magnetic fields; molten metals; solute distribution; thermal convection.

The characteristics of thermal convection in open horizontal

boats containing molten metals or fused salts subject to a

horizontal temperature gradient are shown in a motion picture.

A technique for determining flow direction and mean flow

velocity in systems whose convective flow is characterized by

erratic temperature fluctuations (e.g. metals and salts) was

developed and checked by comparing velocities measured by

this technique with those observed directly in the molten salt. The effectiveness of a magnetic field in suppressing

convective flow is illustrated by comparing the distribution of

98
solute in a specimen solidified unidirectionally in the presence of a field with the distribution in a sample grown normally, i.e. without any field.

9514. Monte Carlo studies of lattice-model polymer chains. II. End-to-end length, P. H. Verdier, J. Chem. Phys. 45, No. 6, 2122-2128 (Sept. 15, 1966).

Key words; Distribution; end-to-end length; lattice model;

Monte Carlo; polymer chain dynamics; relaxation; simulation.

The relaxation and the equilibrium behavior of lattice-model

polymer chains are studied by simulation on a digital computer.

Results are presented for the behavior of the square of end-to- end length P for chains of 8, 16, 32, and 64 beads, with and

without excluded volume restrictions. It is found that the relaxation of the lattice-model chains without excluded volume is remarkably similar to that of statistical-bead models. The

introduction of excluded volume restrictions causes drastic

qualitative changes in the relaxation behavior of the longer

chains, and lengthens the time required for their relaxation by

factors of up to 15. While the distribution in t- for the longer

chains with excluded volume departs noticeably from Gaussian

form at quite small and quite large values of /', it appears close to Gaussian in a range from one-third to three times the meansquare value of P.

9515. Monte Carlo studies of lattice-model polymer chains. I. Correlation functions in the statistical-bead model, P. H.

Verdier, J. Chem. Phys. 45, No. 6, 2118-2121 (Sept. 15, 1966).

Key words; Autocorrelation; correlation; end-to-end length;

Fokker-Planck equation; polymer chain dynamics; radius of

gyration; relaxation; statistical-bead model.

A method is presented for obtaining correlation functions in the free-draining statistical-bead model (Rouse model) of a polymer chain. Autocorrelation functions for the squares of endto-end length and radius of gyration are given as functions of the number of statistical segments in the chain.

9516. Unassigned.

9517. Nonstoichiometric A15-type phases in the systems Cr-Pt and Cr-Os, R. M. Waterstrat and E. C. van Reuth, Trans. Met. 5oc./l/M£236,No. 8. 1232-1233 (Aug. 1966).

Key words: Alloy phases; atomic ordering; A15-type

phases; chromium alloys; electron compounds; intermediate

phases; nonstoichiometric phases; osmium alloys; platinum

alloys; transition elements.

The composition ranges of stability for binary A15-type

phases in the systems Cr-Pt and Cr-Os have been determined.

These do not include the "ideal" A3B stoichiometric

composition at 1200 °C and 1400 °C respectively. X-ray

diffraction studies reveal that long-range atomic ordering is incomplete in these phases with an unusually low degree of order

occurring in the Cr-Os phase. Density measurements on the Cr- Os phase lead to the conclusion that there are insufficient vacant

lattice sites in this phase to account for the apparent low degree

of atomic ordering.

A composition shift is observed for the A15-type phases in the systems Cr-Pt, Cr-Ir, and Cr-Os which parallels a similar composition shift previously observed in binary sigma phases.

This suggests that "electronic factors" may influence the

stability of both the A15-type phases and the sigma phases.

95 1 8. Fermi controlled recombination as a junction design factor

in GaAs laser diodes, N. N. Winogradoff and H. K. Kessler,

Int. J. Electronics 21, No. 4,329-335 (1966).

Key words: Compensated GaAs; epitaxial GaAs lasers; Fermi levels; radiative recombination.

Since our first observation of the enhancement of radiative recombination rates in GaAs p-n junctions produced by the incorporation of shallow donors in the p-type side of the junction, the effect has been found to be quite general and has

also been observed in GaP. Although several models for the

radiative process have been proposed they do not provide a

satisfactory explanation of the role of compensation. A new

model based on Shockley and Read's statistics of recombination

through an impurity center is described. It provides agreement

with the experimentally observed differences in the light output

of diffused, graded, and narrow, abrupt p-n junctions with and

without compensation in the p-type side, and with the difference

in the time delay between the leading edge of the current pulse

and the commencement of lasing in diffused and epitaxial GaAs

lasers at room temperature.

95 1 9. Radiative recombination within a space-charge region in a semiconductor, N. N. Winogradoff, J. Appl. Phys. 37, No. 10, 391 6-391 7 (Sept. 1966).

Key words; Gallium arsenide; germanium; p-n junctions;

radiative recombination; silicon; space charge regions.

Since light emission from forward biased junctions is usually

due to radiative recombination through a recombination center, the minima in the light output observed when cathode rays or a narrow beam of light traversed a p-n junction can be explained in terms of the recombination statistics of the centers in the space

charge region rather than in terms of the separation of the free

carriers by the junction field as is commonly believed.

Furthermore, it -is shown that under certain conditions of

excitation, the luminescence in the space charge region can be a maximum.

9520. Specific heat of natural rubber and other elastomers above

the glass transition temperature, L. A. Wood and N.

Bekkedahl.y. Polymer Sci. Letters 5, 169-175 (1967).

Key words; Butadiene-acrylonitrile copolymer; butadienestyrene copolymers; crystallization of rubber; elastomers;

polybutadiene; polyethylene; polyisobutylene; rubber;

specific heat. A survey is given of literature values of the specific heat C,j as a function of temperature (above the glass transition temperature) for the elastomers, including natural rubber,

polyisobutylene, polybutadiene, several butadiene-styrene

copolymers, and a butadiene-acrylonitrile copolymer. The

values of dC;,/dt (where t is the temperature) found for natural rubber were abnormally low in the range —68 to +2 °C and

abnormally high in the range 1 7° to 47 °C. The most probable

explanation is that crystallization of the unvulcanized rubber was

predominating in the first range, and meldng of these crystals was predominating in the second range.

9521. Effect of sample thickness and operating voltage on the contrast of Kossel transmission photographs, H. Yakowitz, J. Appl. Phys. 37, No. 12, 4455-4458 (Nov. 1966).

Key words; Divergent x-ray beams; Kossel; Kossel sample

preparation; photographic contrast; transmission of x rays; x-ray diffraction. The photographic contrast of transmission Kossel patterns is examined in terms of the voltage and thickness variables since

other parameters in the contrast equation generally cannot be

controlled by the investigator; they are fixed functions of the

material. It is shown that there is no single thickness yielding

maximum contrast. However, manipulation of the contrast equation yields an approximation to the thickness and operating

voltage relationship giving Kossel transmission photographs of

99
nearly optimum contrast. Methods for calculating this relationship for any crystal-radiation combination are described.

It is assumed throughout that the crystal is not completely free of imperfections; however, neither is the crystal assumed to be

completely mosaic.

9522. Ellipsometric errors due to multiple reflections in mica

quarter-wave plates, H. T. Yolken, R. M. Waxier, and J. Kruger.y. Opt. Soc. Am. 57, No. 2, 283-284 (Feb. 1 967).

Key words: Ellipsometer; multiple reflections; quarter- wave plate.

Experiments performed to determine the source of the large

differences in polarizer readings between the ellipsometric zones found that the origin of these polarizer reading differences lay in multiple reflections occurring in the quarter-wave plate. Coating

the quarter-wave plate with anti-reflective layers markedly

reduced the zone differences.

9523. Analysis and computer simulation of the production and

distribution systems of a tufted carpet mill, J. A. Yurow,y. Ind. £«g. XVIII, No. 1. 135-140 (Jan. 1967).

Key words: Industrial dynamics; simulation; tufted carpet

mill. The problem of simulating a multi-line tufted carpet mill by means of a continuous flow simulation language is translated into the problem of simulating a mill producing only four lines. Simulation of the planning and allocation of production time for each line under yarn availability constraints is studied in detail.

9524. Simultaneous diffraction with the three-circle diffractometer, M. Zocchi and A. Santoro, y4c/« Cryst. 22, Pt. 3,331-334(Mar. 1967).

Key words: Diffraction; diffractometer; neutrons; simultaneous: three-circle; x ray. The geometrical conditions of simultaneous diffraction with a

three-circle diffractometer have been derived for all the crystalsystems and for any crystal orientation. It is shown that X- independent simultaneous diffraction takes place among

reciprocal lattice points located on the same vertical net, that

multiplicity is generally odd, and that it obeys special conditions

in all cases in the cubic system and, for particular orientations

and classes of reflection, in the hexagonal and tetragonal

systems. Finally, procedures are suggested for avoiding taking

intensity measurements under conditions of simultaneous

diffraction.

9525. Spectral distribution of solar radiation at the earth's surface, D. M. Gates, Science 151, No. 3710, 523-529 (Feb.

1966).

Key words: Aerosol; air mass; ozone; solar radiation; spectral distribution; water vapor concentration;

wavelength; wavenumber.

The spectral distribution of direct sunlight at the earth's surface at sea level is calculated as a function of the air mass and

of aerosol, ozone, and water vapor concentration. A solar constant of 2.0 cal cm"'' min"' is used for these calculations. The

spectral distribution of sunlight is presented on a wavelength

basis and also on a wavenumber basis. For sea level the spectral

distributions of skylight and of global radiation incident on a

horizontal surface are given. Finally, the variation with altitude of the spectral distribution of direct sunlight incident on a surface perpendicular to the sun's rays is presented.

9526. Electrical feedthrough for pressures to 10 kbar, P. L. M.

Heydemann, Rev. Sci. Instr. Laboratory Notes 38, No. 4,

558-559 (Apr. 1967).

Key words: Electrical connector; feedthrough; high

pressure; resistance gage; ultrasonics.

For ultrasonic experiments at high pressure and for measurements with manganin resistance gages an electrical feedthrough was developed which is both easily fabricated and

convenient to use. The electrical feedthrough (EFT) described

here is designed for low current applications at frequencies

ranging from d.c. to over 50 MHz. EFTs with one, two and four

leads have been made. The insulation resistance between leads and between a lead and the shield is typically above 1000 Mfl.

The EFT can therefore be used in connection with very sensitive bridge circuits. The EFT is made from parts that are easily

available. It is readily attached to and removed from various

kinds of high pressure equipment by means of a standard type

fitting.

9527. Relaxation of moments derived from a master equation, K.

E. Shuler and G. H. Weiss, J. Chem. Phys. 45, No. 4, 1 1 10-

11 12 (Aug. 15,1966).

Key words: Exponential relaxation; master equation;

moments; probability distributions; relaxation; transition

probabilities.

Previous work on the relaxation of moments derived from a master equation [J. Math. Phys. 3, 550 (1962)] has been ex- tended to master equations for joint probability distributions and to nonlinear master equations involving product probability

distributions. Necessary and sufficient conditions on the

transition probabilities are given to obtain closed moment

equations. The special case of simple, one-term, exponential

relaxation of the moments is also discussed.

100
5. AVAILABILITY OF NBS PUBLICATIONS

5.1. PRICE LISTS

The following lists give the numbers and

prices of all NBS publications issued from 1901

through December 31, 1967 which may be purchased from Federal Government sources. Order publications from the Superintendent of

Documents, U.S. Government Printing Office or from the U.S. Department of Commerce Field

Office nearest you. (See Purchase Procedures,

page V).

When an item refers to "see —" the publication has been superseded by the one referenced

and the price opposite the number is the sales

price for the superseding publication. If "OP"

is listed instead of a price, the superseding publication is out of print. (See Out-of-Print Material, page 110).

Nonperiodicals (but not periodicals) may

also be ordered through the Clearinghouse for

Federal Scientific and Technical Information.

(See NBS Publications Program, page IV).

CIRCULARS

No.

3 see C547, Sec. 1,

in part

8 see Mono. 90 --

9 see C602 - 10 see C425

12 see C440

16 see C555

17 see Mono.

25 see M260

29 see C60 .

31 see HlOO

32 see C405 . 35 see M183

40 see C381 . 44 see C440 .

47

47 see M233

49 see H8

51 see C432

52 see C387

54 see H3 & H4

57 see C410

61 see H44, Third Ed.

62 see C424 - 65 see C417

75 see C397

76 see C346

82 see C361

83 see C333

95 see C426

100 see C592

101 see C447

131 see C385

138 see C385

139 see C390

154 see H71

Price

OP

$0.25

OP

OP

OP

OP

.30

.45

OP

.50

OP

OP

OP

OP

OP

OP

OP

OP

OP

2.00

OP

OP

OP

OP

OP

OP

OP

OP

OP

OP

OP

OP

No.

239 see C363

257 see C365

280 see C406

294 see C407

300 see C418

319 see C378

322 see C360

328 see Mono. 15

330 see C362

332 see Mono. 15

339 see C363

371 see C378

375 see C457

380 see C418

383 see C424

390 see H71

392 see C432

396 see C418

398 see M260

399 see C406

400 see C426

402

410

413 see C426

414 see H71

415 see Mono.

428 see C533

434 see C602

435 see H71

438

47

450 see C579 - 456 see Mono. 47

460 - ---

460 Supplement —

Price

OP

OP

OP

OP

OP

OP

OP

OP

OP

OP

OP

OP

OP

OP

OP

OP

OP

$0.45

OP

OP

.05

OP

*

.30

2.50

OP

*

*

.30

1.25

1.50

No.

462 see Mono. 80

in part

464

465 see H90

466 see H71

467 Volume I 467 Volume II 467 Volume III 470

474 see C576

477 see C555

478 see Mono. 104

482 see C509

485 see C592

488 Sections 1 and 2

488 Section 3, 4, and 5

495 see Mono. 88

499

500 see TN270-3

506 see C576

508 see C561

518 see Mono. 70,

Volume I in part

Volume II in part

533

536

537 see NSRDS-NBS

10

539, Vol. 1 to 10 -—-

Price

$2.75

*

.40

*

5.50

4.00

3.00

.30

*

OP

.35

OP

OP

1.25

1.50

.35

* 1.25

*

.55

2.00

3.00

2.50

.20

.40 **

* See page 110 for additional information.

**Available only from the Clearinghouse, Volumes 1 through 10,

when ordering, price $3.00 each.

PB178902 to PB178911, use PB number

101
CIRCULARS—continued

No. Price No. Price No.

552 see M260 --.

553

559 see H71

561

563 & 563 Suppl. see M274

1,

$0.45

2.00

*

.55

.50

567 see M271

571 (PB175659)

572 see Mono. 15

576

$1.25

** OP

*

580 see M251

582

564

593 -

600 see Mono. 90

601

* See page 110 for additional information.

** Available only from the Clearinghouse. Use "PB" number when ordering. Price $3.00.

MONOGRAPHS

No.

1

2

3

3

4

6

8

10

11

12

Volume I Volume II - (PB174987)

13 - 14

16

17

18 see Mono. 88

20

22

24

25 Section 1

(PB178429)

25 Section 2

(PB178430)

25 Section 3

(PB178431)

25 Section 4

25 Section 5

26

27

27 Suppl. This Suppl.

is incl. in Suppl. 2

27 Suppl. 2

28

29 - -

30

31

32 Part I 32 Suppl. to Parts

I and II - - 33

Price No. Price

$0.45 34 $2.75 69

.25 O A Vol. 2 2.00 70

6.00 35 .60 70

6.00 35 Suppl. 1 .65

f-f -f 71

* 36 .30 72

.20 38 .70 73

.40 39 .40 74

.20 40 .40 75

.20 41 .25 76

1.50 42 .75 77

±.0u V Kji unit; X D.OU 781 o

.lO 1 K V Ul UlUtr ±1 7Q

44 .10 80oU

.65 45 .15 81

.35 46 (PB176590) * 82

Z. 1 o 47 QO 8<? 4Q'±17 84

on 50 see M278 - .00 8p; oO

* 51 .30 86

CO52 1.00 87

* 88

.55 54 .25 89

.55 55 .20 90

.20 56 .30

.15 57 see M274 .50 92

58 .20 93

59 1.75 94

.35 60 .25 95

.25 61 4.00 96

.20 62 .15 97

.55 63 .35 98

.35 64 .15 99

4.00 65 .15 100

66 .35 101

.30 67 .60 102

.55 68 .25 103

No.

* Available only from the Clearinghouse; use "PB" number when ordering if indicated. Price $3.00. ** Consolidated supplement to BMS144 and supersedes supplements 1 and 2 of BM S144, available only from the

Clearinghouse. Use "PB" number when ordering. Price $3.00.

102
BUILDING MATERIALS AND STRUCTURES REPORTS

No.

17 Suppl.l & 2, see Mono. 77

19 see BMS116

64 (PB177986) -. 66

66

Price

OP

.40

$0.40

No.

140, Third Ed. -- 144 (PB180647)

144 Suppl. 1 & 2, see Mono. 77

148

Price

.30

*

.15

No.

151 (PB177987)

152

Price

** $0.15

* See Monograph 77. ** Available only from the Clearinghouse; use *PB" number when ordering. Price $3.00.

MISCELLANEOUS PUBLICATIONS

No.

3 see 39 see 54 see 64 see 65 see

78 see 85 see 89 see

90 see 92 see 93 see 94 see 95 see

100 see 111 see 121 see 125 see 126 see

130 see 135 see 141 see

143 see 144 see 152 see 153 see 169 see

171 see 172 see

Price No. Price No.

M232

M234

BH5

H28, Part II - H28, Part IIL

H28, Suppl. -

CS8-61

H28, Part II H28, Part III H28, Suppl.

$0.50

.05

OP

.40

OP

OP

OP

1.25

.75

.60

.70

OP

OP

OP

.40

OP

OP

* OP

OP

OP

1.25

.75

.60

.70

OP

OP

OP

OP

OP

* OP

174 see M211

179

187

203 see M243

211

214 see M286

230 see M288

232

233 see M286

234

236, 1967 Ed.

240

240 Suppl. .... 241 see M260

247

250, 1965 Ed.

253

257

258

259

($6.25 for

100)

260, 1967

260-1

260-2 ......

Ed.

260-4

260-6 - 260-7 ^

260-9 - 260-10

260-11

260-12

$0.20

*

* OP

.20

1.50

2.00

.50

1.50

.10

.15

2.25

4.00

.45

.40

.45

.10

1.75

1.25

.05

.45

.30

.35

.20

.45

.60

.15

.30

.25

.20

260-13

260-14

260-15

262-1 - 262-2 -

265 - 266

267

268 ($6.25 for 100)

269

271

273

274

275

276

277 ___ 277 Suppl. 1

278

278 Suppl.

279

280

281

282

283

284

285

286

287

288

289

290

291

292

294

* See page 110 for additional information.

103
NATIONAL STANDARD REFERENCE DATA SERIES

No.

1

2 - - - 3, Section 1

3, Section 2

Price No.

4, Volume I 5

6

7

Price No. Price

$0.15

.45

.35

.20

$2.50

.70

.40

.35

8

9

10

11

14

$1.00

2.00

.40

.30

.40

BUILDING SCIENCE SERIES

No. Price No. Price No. Price

2, Part 1 $0.35 5, Part 2 - $0.35 10 $0.25

3 - .15 6 .20 11 .25

4 .20 9 .20 12 .15

HANDBOOKS

No.

1 see H82

2 see H24

3 see H30#

7 see H33

8 see H34

9 see H35

10 see H35

11 see H82

12 see H46

14 see H29

15 see H76

17 see H46

20 see H76

21 see H46

22 see H44, Third Ed.

23 see H73

25 see H28, Part I H28, Part II H28, Part III H28, Suppl.

26 see H82

28 1957 (Part I)

28 1957 (Part II)

28 1957 (Part III) - - 28 1963 Supplement

29 See H44, Third Ed.

30#

32 see H81

37 see H94

40 see H46

Price No. Price No.

$1.75

OP

2.50

OP

OP

OP

OP

1.75

* OP

2.00

.30

1.25

.75

.60

.70

1.75

1.25

.75

.60

.70

2.00

2.50

1.75

3.00

41 see H76

42 see H92

43#

44, Third Edition,

Looseleaf —

46

47

48

49

51

see H84 to H89

52 see H69

53

54 see H73

55

56 see H65

57

58

59

60

62

see H76

see H84 to H89

63

64

66

67

68 see H104

69

70

71

72

73

see H104

$0.40

OP

2.00

.20

*

.25

75

76

77 Part II 77 Part III 78 see H84 to H89

80

81#

81 Suppl. 2 -

82

83 see H103

.35 84

.15 85

.30 86

.25 87

OP 88

.15 89

90

.35 91

* 92

93

.40 94

.20 95

.20 96

.25 97

1.25 98

.35 99

1.25 100

* 101

.35 102

.30 103

104

#H81 amends in part: Part 2, Definitions and the Grounding Rules of these Handbooks.

* See page 110 for additional information.

** See individual prices for Handbooks 84 through 89.

104
APPLIED MATHEMATICS SERIES

No.

1 see AMS25

2

5

6 - 8

9

10

11

12

13

14

17

19 (PB175815)

20 - 21 (PB178392)

22

Price

$0.45

.15

.50

2.25

.30

1.75

2.00

.70

.35

.40

5.50

2.00

* 1.75

*

.25

No.

23 (PB175967)

24 (PB175816)

25

26 (PB178415)

27

28 - - - 29

30 (PB175817)

31

32 -

33 (PB175818)

34

35 —

36

40

41 (PB176521)

Price

$0.45

* 4.00

.45

3.50

* 4.75

2.25

2.00

2.00

4.00

.35

No.

42 (PB175819)

43 (PB176127)

44 - 45

46

47 - - 48 (PB176119)

49

50 (PB176520)

51

53

54

55

56

57

58

59

*Available only from the Clearinghouse; use "PB" number when ordering. Price $3.00.

PRODUCT STANDARDS

No. Price No. Price No. Price

1-66 $0.20

.10

.10

4-66 -- $0.10

.15

.10

7-66 $0.10

2-66 5-66 8-67 .15

3-66 6-66 --

COMMERCIAL STANDARDS

No. Price

5-65 $0.10 236-66

9-65 - .10 248-64

20-63 - - .20 251-63

46-65 .15

142-65 - .10 254-63

150-63 - .10

163-64 .15 256-63

188-66 .40 259-63

190-64 .10 261-63

205-64 .10 262-63

227-59 .15 263-64

No. Price

$0.10 264-64

.10 265-64

266-64

.10 267-65

* 268-65

269-65

.10 270-65

.20 271-65

.10 272-65

.10 273-65

.10 274-66

No. Price

with

Amendment

$0.10

.10

.10

.10

.10

.10

.15

.10

.15

.10

.10

Available by purchase from the Clearinghouse for $3.00.

SIMPLIFIED PRACTICE RECOMMENDATIONS

No. Price No. Price No. Price

53-63 (PB175782)

174-65

* $0.10

179-63

229-63

$0.10

.10

265-63

266-63

267-65

$0.05

.10

.10

*Available only from the Clearinghouse; use "PB" number when ordering. Price $3.00.

105

313-589 0-69—
PURCHASE OF TECHNICAL NOTES

The following is a list of the National Bureau

of Standards Technical Notes available only

by purchase from the Clearinghouse for Federal Scientific and Technical Information, 5285

Fort Royal Road, Springfield, Virginia, 22151,

at the prices indicated. The "PB" number or

"AD" number in parenthesis is to be used when

ordering this series. These prices are for re- produced hard copy. If you wish microficshe

of these Technical Notes, they are available

for 65 cents each.

No. Price No. No. Price

$3.00 74 (PB161575) - $3.00

Q f\f\ 75 \^ X ±J Jl\J XfJ 1 \J f O AA O.OO

3.00 7fi fPBI fii 577'» \1. ±Jj JL\J l-fJ I 1 ) 3.00

3.00 77 CPB1 J. J_> J.\Jfii± tJ578^ t O / 3.00

3.00 781 O rPRI \±. JJXUfiiJ.(J579^ t ij / 3.00

3.00 79 (PB161580) 3.00

O.UU 80 fPBI \1. iJ jL\JfiiXOO581I. / O AA O.OO

3.00 81O J. ^PBI \^J. ±jJi.\JXtJO^/ fii 58?^ 3.00

3.00 82 ('PB1fi158^"> \ 1. ±Ji\JJ.OOO/ 3.00

3.00 8.^ rPRI yi. J_> JLVJ±tJO*±/ fii 584'i 3,00

3.00 84 fPRI i XJ jL\jfii±rJOtJ 585 ">/ 3.00

3.00 85 rPBI±JX\J±U<J\J/ fii 58fi^ 3.00

3.00 8fi ^PRI \±. ±J JL\JfiiXfJO 587^9 / 8.00

3.00 87 (PTi^ fii p;88'4

\1. ±j±\JXtJOCj/ 3.00

3.00 88 fPBI i UX\Jj.tJ(DiJ/ fii 589 3.00

3.00 89 (PB161590) 3.00

O.UU 90 CPR1xj±\jxtjijxj fii 591 \ O AA O.OO

3.00 91 rPRI±J±\J±tJiJ^/ fii 59?^ 3.00

3.00 9? ?PR1 yx ijxijxuutj/ fii 59^^ 3.00

3.00 9.^ rPR1fi1594^ yx xixuxoi/^/ 3.00

94 (PB161595) 3.00

3.00 95 (PB161596) 3.00

O.UU 9fi <^PR1 \X LjXUXOZf fii 597^t / O AA O.OO

3.00 V 1 rPRI ^JT XJ XUfiiXOVO 598^) 3.00

3.00 rPRI ^JT XjXUXUVJO fii fiO^^f 3.00

3.00 fPRI JT XJXUXUly fii fi07^1 f 3.00

3.00 107 (PB161608) 3.00

O.UO 108 <^PR1 ^XX>XDXQVt7 fii fiOQ^} 3.00

3.00 lOQ /"PRIfilfilO^ ^x 13 XDXDXU ) 3.00

3.00 110 rPRI ^XXjXOXDXX fii fii 1 ^} 3.00

3.00 111 J. ± J- ^PRI ye £> XKjfiixxjfiixo9\) 3.00

3.00 112 (PB161613) 3.00

O AA o.OO 11^ X xo ^PRI ^X^IDXDxUX^t^ fii fii A\ O AA 3.00

3.00 114 X X^ /^PRI \^X^XjXDXDXO^ fii fii 3.00

3.00 1

rPRI ^xIjXDXDxU^ fii fi1 fi^ 3.00

3.00 lift ^PRI fii fii '7\ ^^XX5XOXDXl ) 3.00

3.00 117 (PB161618) 3.00

3.00 118 (PB161619) 3.00

3.00 119 (PB161620) 3.00

3.00 121 (PB161622) 3.00

3.00 122 (PB161623) 3.00

3.00 123 (PB161624) 3.00

3.00 124 (PB161625) 3.00

3.00 125 (PB161626) 3.00

3.00 128 (PB161629) 3.00

3.00 129 (PB161630)-— - 3.00

1 (PB151360)---

2 (PB151361)--.

2-2 (PB151361-2

3 (PB151362) —

4 (PB151363)--

5 (PB151364)-

6 (PB151365)

7 (PB151366)

8 (PB151367)

9 (PB151368)-

10 (PB151369)-

11 (PB151370)-

12 (PB151371)-

13 (PB151372)

14 (PB151373)

15 (PB151374)

16 (PB151375)

18 (PB151377)

18-2 (PB151377-2)

18-3 (PB151377-3)-

18-4 (PB151377-4).

18-5 (PB151377-5)

18-6 (PB151377-6)

18-7 (PB151377-7)

18-8 (PB151377-8)-

18-9 (PB151377-9)-

18-10 (PB151377-10)

18-11 (PB151377-11)

18-12 (PB151377-12)

18-13 (PB151377-13)

19 (PB151378)

20 (PB151379)-

21 (PB151380)-

22 (PB151381)-

23 (PB151382).

24 (PB151383)

25 (PB151384)

26 (PB151385)-

27 (PB151386).

28 (PB151387)-

29 (PB151388)-

30 (PB151389).

31 (PB151390)^

33 (PB151392)

34 (PB151393)-

$3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

35 (PB151394)

36 (PB151395).

37 (PB151396)-

38 (PB151397)-

39 (PB151398)-

40-1 (PB151399-1)- - -- 40-2 (PB151399-2)-—

40-3 (PB151399-3)---

40-4 (PB151399-4)-.

40-5 (PB151399-5)---

40-6 (PB151399-6)

40-7 (PB151399-7)

40-13 (PB151399-13)-

41 [PB151400)

42 (PB151401)--- -

43 [PB151402)

44 (PB151403)

45 ^PR151404^ ±. jj J- / 46 :PB151405)

47 [PB151406)-- .-.

48 [PB151407)

49 ;PB151408)

50 (TB151409)

51 <TB161552)

52 <;PB161553)

53 {TB161554)

54 (TB161555)

55 (TB161556)

56 (TB161557)

57 <;PB161558)

58 (TB161559)

59 (TB161560) —- --

60 (TB161561)

61 ( PB161562)

62 ( PB161563)

63 ('PB161564)

64 ('PB161565)

66 ( PB161567)

67 ( PB161568)

68 ( PB161569)

69 ( PB161570)

70 ( PB161571)- - - 71 ( PB161572)

72 ( PB161573)

73 ( PB161574)

106
TECHNICAL NOTES—continued

No.

130 (PB161631)

131 (PB161632)

132 (PB161633)

133 (PB161634)

134 (PB161635)

135 (PB161636)

136 (PB161637)

Price

3.00

3.00

3.00

3.00

3.00

3.00

3.00

No.

137 (PB161638)

138 (PB161639)

139 (PB161640)

140 (PB161641)

142 (PB161643)

143 (PB161644)

146 (PB161647)

Price No. Price

3.00 147 (PB161648)— 3.00

3.00 148 (PB161649) 3.00

3.00 166 (PB181454) 3.00

3.00 225 (AD614056) 3.00

3.00 294 (PB176289) 3.00

3.00 304 (AD615936) 3.00

3.00 334 (PB173291) 3.00

414 (PB176109) 3.00

The following Technical Notes and all subse- U.

quent issuances in this series may be pur- D.

chased from the Superintendent of Documents,

S. Government Printing Office, Washington,

C, 20402, at the prices indicated.

No. Price No. Price No. Price

18-14

18-15

18-16

18-17

18-18

18-19

18-20

18-21

18-22

18-23

18-24

18-25

18-26

40-8 - 40-9 -

40-10

40-11

40-12

98

99

100

100-A - 101 Vol. 1

101 Vol. 2

103

120 - 120A

127 - 129A,

141 - 145

151 . 153 -- 154A (PB182435)

$0.50

.45

.60

.50

.50

.50

.50

.50

.50

.50

.50

.40

.45

.35

.35

.35

.40

.35

.50

.30

1.50

.20

1.00

1.00

1.00

.45

1.00

.60

.50

.25

.60

.20

.30

*

155

157

158

159

160

161

162

163

164

165

169

171

172

173

174

175

177

178

179

180

181

182

183

184

185

186 see TN265

187

188

190

191 (PB182538)-

192

193 - 194 - 196 --

$0.25

1.25

.45

.25

.15

.15

.50

.25

.40

.40

.25

2.00

.30

.25

.25

.25

.75

.20

.65

.15

.50

.15

.25

.20

.40

.50

.15

.20

.40

.25

1.00

.25

.20

197

198

199

200

202

203 - 204 - 205 --- 206-1

206-2

206-3

206-4

206-5

207 -

208 -

209

210

211 Vol. I . 211 Vol. II . 211 Vol. Ill

211 Vol. IV

211 Vol. V

211 Vol. VI

214

215 -

216

217

218

219

220

221

222

223

224

225 (AD614056)

$0.30

.25

.30

.25

.60

.30

.25

.25

.25

.25

.25

.25

.30

1.50

.15

.20

.30

.50

.45

.60

.65

.60

.60

.35

.25

.20

.55

.30

.45

.25

.20

.30

.20

.20

*

*Available only from the Clearinghouse; use "PB" or "AD" number when ordering.

107
TECHNICAL NOTES—continued

No.

226

227

228

229

230

231

232

233

234

235

236

237

240

241

243

244

245

246

247

248

249

252

253

255

256

258

260

261

262

262-A

263 - 264

265 see TN441

266

267

269 -

270-1 see TN270-3

270-2 see TN270-3

270-3

271

272

273

274

275

276

277

278

279

280

281 - $0.50 336

Price

$0:40

.30

.20

1.25

.40

.25

.60

.20

.30

.25

.40

.15

.20

.25

.10

.20

.35

.40

.40

.50

.40

.40

.10

.45

.25

.25

.50

.25

1.00

.50

.25

.50

.55

.15

.45

.20

1.25

1.25

1.25

.60

.50

.50

.60

.50

1.00

.60

.30

.30

.25

No.

282

283

284

285

286

287 (PB182436)-

288

289

290

291

292

294 (PB176289)

295

296 - - --

297 - - -

298

299

300

301

302

303

304 (AD615936)-

305

306

307 -

308

309

310

311

313

314

315

316

318

319

321

322

323

324

325

326

327

328

329

330

331

332

333

334 (PB173291)-

335 -

Price

$0.25

.35

.15

.25

.25

.30

.50

.25

.30

.50

*

.25

.60

1.00

.40

.25

.50

.55

.60

.25

*

.60

.75

.40

.50

.60

.30

.30

.45

.55

.25

.35

.55

.55

.15

.20

.25

.30

.30

.60

.20

.25

.35

.30

.20

.60

.25

*

.25

No.

337

339

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

360

362

400

401

402

403

404

405

406

409

423

425

426

427

428

430

431

434

435

437

410

411

412

413

414 (PB176109)-

415

416

418

420

421

.30 438

Available only from the Clearinghouse; use "PB" or "AD" number when ordering.

108
BOUND VOLUMES OF THE JOURNAL OF RESEARCH

VoL

69A (Jan.-Dec. 1965)

70A (Jan.-Dec. 1966)

71A (Jan.-Dec. 1967)

69B (Jan.-Dec. 1965)

70B (Jan.-Dec. 1966)

71B (Jan.-Dec. 1967)

Price

5.50

5.50

7.75

3.75

3.25

4.50

Vol. Price

69C (Jan.-Dec. 1965) 3.75

70C (Jan.-Dec. 1966) 3.25

71C (Jan.-Dec. 1967) - 4.25

5.2. SOURCES FOR REPRINTS OF NBS PAPERS IN PERIODICALS

TYPE OF PAPER

SOURCES

NBS Journal

Research Papers

Prior July 1959

NBS Journal

Research Papers

July 1959 to Present

NBS-Authored

Papers,

non-NBS Media

Superintendent of

Documents, GPO See Footnote ^

Clearinghouse - See Footnote ^

Author X X

Federal Depository

Libraries * X X

Library of

Congress ^ X X X

Original Media X

' RESEARCH PAPERS were reprints of individual articles that appeared in Volumes 1-62 of the monthly

Journal of Research. These papers were published, numbered, and made available separately. In 1959 NBS began

publishing the Journal of Research in separate sections, and RESEARCH PAPERS were discontinued.

^Address: Clearinghouse for Federal Scientific and Technical Information, National Bureau of Standards, U.S.

Department of Commerce, Springfield, Virginia 22151.

"Bound volumes or (when available) the individual Journals may be purchased. See price list, page

* Primarily for reference; some libraries are equipped to reproduce copies for a fee. See Appendix A for list.

° Hard copy available at $3.00. Microfische copies also available at $.65. See Footnote (2) for address.

" Photoduplication Service, Library of Congress, Washington, D. C. 20540.

109
5.3 OUT-OF-PRINT MATERIAL

Those NBS publications not listed in the

Price Lists, are out of print and are not available from the Superintendent of Documents.

Many can be consulted at Libraries. Also, in

many cases, photoduplicated copies can be purchased from the Library of Congress. For full

information concerning this service, write to the

Circular 410, National Standard Petroleum Oil

Tables. Information in this Circular has been

incorporated in the ASTM-IP Petroleum Measurement Tables issued by the American Society

for Testing and Materials, 1916 Race Street,

Philadelphia, Pa., 19103. Available at $8.75

($6.50 to ASTM members). Tables 5 and 7

of the ASTM-IP Tables may also be purchased

from the ASTM in separate reprint form at

$1.50 a copy for the two tables.

Circular 438, Static Electricity. The National

Fire Protection Association, 60 Batterymarch

Street, Boston, Mass., 02110, has issued a publication by the same title, available from them

as NFPA Publication 77M, at $1.00.

Circular 464, Gas Calorimeter Tables. The

American Society for Testing and Materials,

1916 Race Street, Philadelphia, Pa., 19103, has

issued a publication on this subject. Listed as ASTM D900-55, it can be ordered at 75 cents

per copy.

Circular 499, Nuclear Data. The publication of

nuclear data is being continued in a new journal

entitled Nuclear Data, published by Academic

Press, 111 Fifth Avenue, New York, N.Y.,

10003.

Circular 564, Tables of Thermal Properties of

Gases. A reprinted edition is available from

Pergamon Press of London and New York, at

$20.00. The chapter on Nitrogen by Woolley

was reissued as NACA Technical Note 3271

(March 1956) and the chapter on Steam by

Fano, Hubbell, and Beckett was reissued as NACA Technical Note 3273 (August 1956).

Information on these two Technical Notes may

be obtained from the Office of Technical Information, National Aeronautics and Space

Agency, 1520 H Street, N.W., Washington, D.C.,

20546.

Circular 576, Automotive Antifreezes. For information on this subject consult United States

of America Standards Institute, 10 East 40th

Street, New York, N. Y., 10016.

Circular 577 and Supplement.. Energy Loss and

Range of Electrons and Positrons. These have

been superseded by NASA Special Publication

3012, available from the Clearinghouse for

Federal Scientific and Technical Information,

Springfield, Va., 22151, at $3.00 hardcopy and

$.65 microfische Number N65-12506.

Photoduplication Service, Library of Congress,

Washington, D.C. 20540.

Certain NBS publications are out of print

because they have been replaced, or partially

replaced, by material issued by other organizations. In this connection, NBS is able to offer

the following information:

Circular 579, Underground Corrosion. Now

available as PB168350 from the Clearinghouse

for Federal Scientific and Technical Information, Springfield, Va., 22151, at $3.00 hard copy

and $.65 microfische.

Miscellaneous Publication 179, American Standard Building Code Requirements for Minimum

Design Loads in Buildings and Other Structures. United States of America Standards Institute, 10 East 40th Street, New York, N. Y.,

10016, has issued a publication on this subject.

Available from them as A58. 1-1955, at $2.50.

Miscellaneous Publication 187, Directory of

Commercial and College Laboratories. A new

Directory of College and Commercial Testing

Laboratories is published by the American Society for Testing and Materials, 1916 Race

Street, Philadelphia, Pa. 19103, at $1.50.

Handbook 46, Code for Protection Against

Lightning. A United States of America Standards Institute Code for Protection Against

Lightning (NFPA No. 78-1963) is available

from United States of America Standards Institute, 10 East 40th Street, New York, N. Y.,

10016, at 75 cents.

Handbook 49, Recommendations for Waste Disposal of Phosphorus-32 and Iodine-131 for

Medical Users. Reprints of this Handbook can

be purchased at $.40 per copy from NCRP

Publications, Post Office Box 4867, Washington, D.C. 20008.

Handbook 58, Radioactive Waste Disposal in

the Ocean. Reprints of this Handbook can be

purchased at $.45 per copy from NCRP Publications, Post Office Box 4867, Washington, D.C,

20008.

Handbook 71, Specifications for Dry Cells and

Batteries. For more information on this Handbook, write to United States of America Standards Institute, 10 East 40th Street, New York,

N. Y., 10016.

Handbook 76, Medical X-ray Protection Up to

Three Million Volts. Reprints of this Handbook

can be purchased at $.50 per copy from NCRP

Publications, Post Office Box 4867, Washington, D.C. 20008.

Handbook 84, Radiation Quantities and Units,

has been superseded by ICRU Report 11 and

can be purchased at $1.00 per copy from ICRU

Publications, Post Office Box 4869, Washington,

D.C. 20008.

110
6. INDEXES

6.1. HOW TO USE THE INDEXES

In addition to the usual author index, a subject index is provided in the form of a permuted key-word index. In this type of index

the key words in each publication or paper are arranged by shifting each group of key words

along the horizontal printing line so that eaxh

key word in turn has an opportunity to appear

alphabetically. The user is thus able to locate

papers of interest to him through the subjectrelated words he finds in the key-word index.

The index symbols used in the author and

key-word indexes are explained in the following

three tables. These tables also give the pages

on which the abstracts of the various publication series begin.

Table A. Symbols for the Nonperiodicals

Index

Symbol

NBS

Nonperiodical Series

Page

Number

Mono. Monographs 27

H Handbooks 30

M Miscellaneous

Publications

31

AMS Applied Mathematics

Series

35

NSRDS National Standard

Reference Data Series

36

BSS Building Science Series 38

CS Commercial Standards 39

SPR Simplified Practice

Recommendations

40

PS Product Standards 41

TN Technical Notes 42

111
Table B. Symbols for the Periodicals

NBS

Journal of Index

Symbol

Issue Date Page

Number

Vol. Sect. No.

J70 A 4 July-August 1966 1

( J70 A 5 September-October 1966 2

\ J70 A 6 November-December 1966 2

bection A / J / i

AA 1

T 1 1 1 -4 y-\ /-% mm January-February 1967 5

J J71 A 2 March-April 1967 6

1

J71 A 3 May-June 1967 8

J71 A 4 July-August 1967 9

1 J71 A 5 September-October 1967 10

J71 A 6 November-December 1967 11

/ J70 B 3 July-September 1966 13

\ J70 B 4 October-December 1966 13

Section B ] J71 B 1 January-March 1967 15

J71 B 2 & 3 April-September 1967 16

\

J71 B 4 October-December 1967 17

/ J70 C 3 July-September 1966 20

I J70 C 4 October-December 1966 21

ocCLlOXl \u ^ J71 C 1 January-March 1967 22

J71 C 2 Anril-Junp 1967 23

J71 C 3 July-September 1967 24

J71 C 4 October-December 1967 25

Table C. Symbols for the Papers Published

By Others (1966-1967)

NBS Papers

Published by Others

(1966-1967)

Index Symbol Page

Number

Professional Journals,

Book, Book Chapters,

Proceedings, etc.

Four-Digit numbers,

9150 through 9527 54

112
6.2. AUTHOR INDEX

A

Abdel-Rahman, I. H., M284. p. 113. Abramowitz, S., Cassidy, E. C, 9292.

Abramowitz, S., Levin, I. W., 9265.

Abramowitz, S., Levin, L W., 9349.

Achenbach, p. R., Faison, T. K.Jr., Davis.J. C, BSS12.

AcQUiSTA, N., White, D., Mann, D. E., 9359.

Alexander, S. N., Rikli, A. £., Allen, S. L, 9500.

Allen, H.C.JR., TN293.

Allen, H. C.Jr., 9426.

Allen, S. L, Alexander, S. N., Rikli, A. E., 9500.

Allion, H. H., Ruegg, F. W., 9390.

Allman, W. P.,9427.

ALPERT,S.S.,A^27i,p. 157. Als-Nielsen, J., Dietrich, O. W., M273, p. 144. Alspach, W. J., Flynn, T. M., Miller, C. E., 9486.

Alspach, W. J., Miller, C. E., Flynn, T. M., 9428.

Ambler, E., Colwell,J. H., Hosler, W. R., Schooley.J. F., 9269.

Anderson, H. J., Bates, J. L., Wachtman,J. B.Jr., Wheat,

M. L.,9173.

Andrew, K. L., Kaufman, V., Radziemski, L.J. Jr., 9337.

Andrews, D.H., 92i7.

Angelo, M., yVf297, p. 7 55. Antonucci, D., M291,pp. 149, 152. Antonucci,J. M., Wall, L. A., J. 70X 6-420,473-480(1966).

Antonucci,J. M., Wall, L. A., J. 71A 1-434, 33-41 (1967).

Appleton, W. H., Cullen, W. C, 9249.

Argentar, H., Brauer, G. M., Durany, G., J. 71A 5-468,

379-384 (1967).

Armstrong, G. T., Domalski, E. S., J. 71A 4-462, 307-315

(1967).

Armstrong, G. T., Domalski, E. S., J. 71A 2-440, 105-118

(1967).

Armstrong, G. T., Domalski, E. S., J. 71A 3-451, 195-202

(1967).

Armstrong, G. T., Domalski, E. S., 9270.

Armstrong, G. T., Marantz, S., 9360.

Armstrong, G. T., TN299.

Arp, v., 9429.

Arsenault, E.J., M291, p. 165. AuMAN,G.E., 927/.

AusLOOS, P., Lias, S. G., 9180.

AusLOOS, P., Lias, S. G., 9272.

AusLOOS, P., ScALA, A. A., Lias, S. G., 9273.

AusLoos, P., ScALA, A. A., Lias. S. G., 9392.

AusLOOS, P., ScALA, A. A., 9i97.

AusLOOS, P.J., Rebbert, R. E., 9385.

Axilrod, B.N., TN246.

B

Badger, H. L., McSparron, D. A., Douglas, C. A., TN418.

Baker, D., 9274.

Balling, L. C.,9275.

Barber, D.J., Tighe, N. J., 9430.

Barnes,J. A., Wainwright, A., 9752.

Barnhart, H. D.,M291,p. 32. Barth,J.J., TN353.

Bartky, L R., 9276.

Bartky,LR., 9277.

Bartky, LR., 9275.

Bass, A. M., Ledford, A. E.Jr., Braun, W., 9287.

Bass, A. M., Tilford, S. G., Herzberg, G., Simmons, J. D.,

9330.

Bass, A. M., 9279.

Bates, J. L., Wachtman,J. B.Jr., Wheat, M. L., Anderson,

H.J., 9/7i.

Bates, R. G., Covington, A. K., Robinson, R. A., 9440.

Bates, R. G., Paabo, M., Robinson, R. A.,9493.

Bates, R. G.. Robinson. R. ^..J. 10X6-427,553-556 (1966).

Bates, R. G., Robinson, R. A., Gary, R., 97 70. Bates, R. G., Robinson, R. A., Hetzer, H. B., 9460.

Bates, R. G., Robinson, R. A., Paabo, M.,9492.

Bates. R. G., Steel, B. J., Robinson, R. A., 7. 71A 1-430, 9-12

(1-967). Bates, R. G.. TN400.

Bates. R. G.. TN423.

Bearden.J. a.. Burr. A. P., NSRDS-NBSI4.

Beatty. R. W^.,Mono. 97. Beatty. R. W.. TN351.

Beatty, R. 'W.,9280.

Becker, D. A.. Smith. G. W.,9169.

Bedford. R.J. ,M291, p. 83. Bekkedahl,N..Wood, L. A., 9520.

Benedek. G.. Nardelli. G. F.,M287, p. 161

Benedek, G. B., Ford. N. C.Jr., M273, p. 150. Benedek, G. B.,M273, p. 42. Bennemann, K. \\..M287, p. 127. Bennett, H. S..M287, p. 123. Berger,H. W.,94J/.

Bestul. a. B.. Chang, S. S.. Horman.J. A.. J. 71A 4-461.

293-305 (1967).

Beynon, W.J. G., Shapley. A. H.. 9267.

BiLLicK. L H.. Schultz. M.. Weiss. G. H..J. 71A 1-431, 13-17

(1967).

Blair. B. E.. Morgan. A. H.. TN341.

Blank, W. J., Chariton, R. P.. Selby. M. C, 9266.

Blatt,F.J.,Fankhauser. H. R.,M287, p. 109. Block. S.. Perloff, A.. Reimann, C. W..9499.

Block, S.. Robbins, C. Perloff. A., J. 10X 5-411, 385-391

(1966).

BLOOM,M.,A/27i,p. 178. BoLTOSKY, G. R.,Tauber, S.J., Marron, B. A.. 9482.

Booker. H. G., Little, C. G., 9158.

Boone, T. H.. Cullen. W. C..BSS9.

Boone. T. H.,9/77.

Boone, T. H.,94i2.

Bose, R. C. Cameron.J. M.,7. 71B4-2i7, 149-160 (1967).

Boswarva, L M., Lidiard. A. B.. M287, p. 7. BoTTER, R., Dibeler, V. H., Walker,J. a., Rosenstock,

H. M.,92S7.

Bowen, R. L., Paffenbarger, G. C, Sweeney, W. T.. 9494.

113
BowEN, R. L.,9433.

Bower, V. E., Robinson, R. A.. J. 70A 4-405, 305-311 f 1966).

Bower. V. E., Robinson, R. A.. J. 10X4-406. 313-318 (1966).

Bowman, H. A., Schoonover, R. M., Jones, M. W..7. 71C

3-254, 179-198 (1967).

Boyd, M. E., Larsen, S. Y., Kilpatrick,J. E..9282.

Boyd, M. E., Larsen, S. Y., TN412.

Bozman,W. R., Meggers, W. F., Corliss, C. H.J.1\A6-471,

547-565(1967).

Brady. E. L..9283.

Branscomb, L. M., 9285.

Brauer, G. M., Durany, G., Argentar. H.. J. 71A 5-468,

379-384(1967).

Braun,W..Bass, A. M.,Ledford, A. E.]r., 9287.

Braun. W., Welge, K. H.. McNesby,J. R., 9286.

Breckenridge. F. C.Mono. 75. Breen, D.. Keller, R..9178.

Brennen, W., Brown, R. L..9289.

Brennen, W., Carr!ngton,T., 9255.

Brenner, A., Salmon, H. I., Metzger, W. H. Jr., 9455.

Brinckman, F. E., Coyle, T. D., Davison, A., Faller.J. W.. Farrar,T. C.,9449.

Brinckman, F. E., Farrar, T. C, Coyle, T. D..Timms, P. L., Ehlert.T. C, Margrave,J. L..9229.

Brittin.W. E.. Glass, S.J.,Chappell,W. R..92J0.

Broadhurst. M. G.J. 10X6-421.481-486 (1966).

Brockman.J. F., Richardson.J. M.,9387.

Broida. H. p., Evenson, K. M., Kiluchi, T. T..9163.

Brombacher, W. G.,Mono. 35. Supplement 1

Brombacher, W. G., TN298.

Brooke, R. L., Hoer. C. A.. Love. C. H..J. 71C 1-444. 59-67

(1967).

Brower, W. S., Early.J. G.. Utech. H. P., 95/.?. Brower.W. S.,Fang, p. W..9434.

Brown, W. E., Moreno. E. C. Gregory, T. M.,y. 70A 6-426,

545-552 (1966).

Brown. W. E., Wallace, B. M..92/2.

Brumberger, H..M273. p. 116. Brungart, D.,yW29/,p. 81. Brzezinski, C.J.. Riordan.J.J., M291 . p. 115. Buckingham, M.]..M273. p. 95. Burdick,M. D.,9222.

Burr. A. F.. Bearden.J. A.,NSRDS-NBS14.

BuRSTEiN, E., Maradudin, a. a., Ganesan, S.,M257, p. 189.

c

Callaway,J., Hughes, A. J., M287. p. 131. Calvert .J. P., Kruger.J., 9469.

Cameron,J. M.. Bose, R. C..J. 11B4-237. 149-160 (1967).

Cameron.J. M..Eicke,W. G..TN430.

Cameron,J. M., M29I , p. 68. Cameron,J. M., Pontius, P. E.,Mono. 103. Candela, G. a., Frederikse. H. P. R., 945i.

Candela, G. a., Mundy, R. E..9291

Carrington,T., Brennen, W., 9255.

Carter.J. C, Horn, D.. Coyne.J.J., Meshkov, S., 9332.

Carter. R. S., Muehlhause. C. O.. Meyers, V. W.,9435.

Case, W. E., Harrington, R. D.. J. IOC 4-236. 255-262

(1966).

Case, W. E., Schmidt, L. B.. Harrington, R. D., J. 71C

1-445,69-75 (1967).

Case, W. E , Schmidt, L. B.. Harrington, R. D..9395.

Casimir, H. B. G.,M284,p. 22. Cassel.J. M.,9436.

Cassidy, E. C, Abramowitz, S.. 9292.

Caswell. R. S.. Maximon, L. C.,TN409.

Caswell, R. S..TN410.

Cataland, G., Plumb, H., 9379.

Catanzaro, E. J., Murphy, T. J., Garner, E. L., Shields,

W. R., J. 10X6-416, 453-458 (1966).

Cerezo, a. S., Deulofeu, V., Cohen, A., Tipson, R. S.,

J. nx 1-437, 53-79(1967).

Chang, R., Graham, L.J., M287. p. 53. Chang, S. S.. Horman.J. A.. Bestul. A. B., 7. 11X4-461,

293-305 (1967).

Chappell. W. R., Brittin, W. E., Glass, S. J., 9250.

Chariton. R. P.. Selby, M. C, Blank, W.J., 9266.

Chase, C. E., Williamson, R. C, M273. p. 197. Childs, G. E., Hanley, H.J. M., TN350.

Childs, G. E., Hanley, H.J. M., TN352.

Chisholm, L.J., M286.

Chisholm, L. J., M290.

CHU,B.,M273,p. 123. Chueh, P. L., Prausnitz,J. M., Gunn, R. D., 9456.

Clark, H. E., Moore, D. G.,J. 10X5-412, 393-415 (1966).

Clark, H. E., Richmond, J. C, Dunn, S. T., Geist, J. C,

Moore, D. G., TN415.

Clark, H. E., Young, R. D., 9423.

Clark, H. E., Young, R. D., 9424.

Clarridge, R. E., M29/, /7. y 76. Cleek,G. W.,94i7.

Codling, K., Madden, R. P., 9205.

Codling, K., Madden, R. P., Ederer, D. L., 9355.

Cohen, A., Tipson, R. S., Cerezo, A. S., Deulofeu, V.,

J. 71A 1-437. 53-79 (1967).

Cohen, H. D., Fano, U., 9293.

Coleman,J. A., Domen, S. R., Dodge, W. R., 9295.

Coleman, J. A., Swartzendruber, L.J., 94i5.

Colwell, J. H., Hosler, W. R., Schooley,J. F., Ambler, E., 9269.

Comeford,J.J., Milligan, D. E.,Jacox, M. E., 9i65.

Comeford,J.J., 9294.

Condon,J. E.,M291,p. 119. Connor, D. W., Thaper, C. L., Rush, J.J. , Flotow, H. E., 9506.

Cook, R. K., 9225.

CooPER,J., Coyle, T. D., Farr.'VR, T. C, 9450.

Cooper, R. N., W254, p. 75. Cooter, L L., 9245.

Coriell, S. R., Parker, R. L., 9439.

Coriell, S. R., Simmons, j. A., Oser, H., 9505.

Corliss, C. H., Bozman, W. R., Meggers, W. F.,y. 71 A 6-471,

547-565 (1967).

Corliss, C. H., Mono. 32, Supplement.

Corliss, C. H., Shumaker, J. B. Jr., J. 71A 6-473, 575-583

(1967).

Corliss, C. H., Tech,J. E.J. l\X6-472, 567-573 (1967).

Corliss, C. H., Warner, B., J. lOX 4-409, 325-371 (1966).

Cornog, D. Y., Rose, F. C, M262-2.

C0STRELL,L., 9209.

Cotterill, R. M. j., Doyama, M., M257, pp. 43. 47. Covington, A. K., Robinson, R. A., Bates, R. G., 9440.

Coyle, T. D., Davison, A., Faller, J. W., Farrar, T. C,

Brinckman, F. E., 9449.

114
CoYLE, T. D., Farrar, T. CCooper, J., 9450.

CoYLE, T. D., TiMMS, P. L., Ehlert, T. C, Margrave, J. L., Brinckman, F. E., Farrar, T. C, 9229.

CoYNE,J.J., Meshkov, S., Carter,J. C, Horn, D., 9332.

CoYNE,J.J., Meshkov, S., Yodh, G. B., 9295.

Crawford, M. L., Hudson, P. A., J. 71C 2-250, 111-117

(1967).

Crissman,J. M., Passaglia, E., 9441.

Cross,J. L., Thomas, A. M., TN420.

Cross,J. L., Thomas, A. M., 9413.

Crumlish,J. D., TN294.

CuLLEN, W. C, Appleton, W. H., 9249.

CuLLEN, W. C, Boone, T. H., BSS9.

Cullen,W. C.,9172.

CuLLEN,W.C., 9207.

Cuthill,J. R., McAlister, A. J., Williams, M. L., 9442.

D

Danos, M., Fuller, E. G., 9216.

Danos, M., Greiner, W., Huber, M. G., Weber, H.J., 9214.

Danos, M., Greiner, W., Kohr, B. C, 9296.

Danos, M., Ligensa, R., Greiner, W., 9352.

Darling, L., M291,p. 72. Davey,W. R.,TN358.

Davis,J. C, Achenbach, P. R., Faison, T. K. Jr., BSS12.

Davis, L. J., Kirstein, A. F., Pell, W. H., Woolley, R. M.,

J. IQC 4-234, 227-244 (1966).

Davis, S. P.,Re\dek,J.,J. 71\6-475, 587-599 (1967).

Davison, A., Faller, J. W., Farrar, T. C, Brinckman, F. E., CoYLE,T. D.,9449.

Dawson,J. A., TN342.

Debye, P., M273,p.l07.

deHalas, D. R., Freshley, W. D., Morgan, W. C, M285,p.

61. DeLauer, D.,M291,p.81.

deMaine, p. a. D., Kloss, K., Marron, B. A., TN413.

Deslattes, R. D., LaVilla, R. E., 9443.

Deslattes, R. D., LaVilla, R. E., 9473.

Deslattes, R. D., Sauder, W. C, J. 71A 5-464, 347-353

(1967).

Dessauer,J. H., M284, p. 136. Dettmann, K., Ludwig, W., M287, p. 185. Deulofeu, v., Cohen, A., Tipson, R. S., Cerezo, A. S.,

y. 71A 1-437,53-79 (1967).

DeVoe,J. R., Landgrebe, A. R., McClendon, L. T., 9168.

DeVoe,J. R., Smith, G. W., 9154.

DeVoe, J. R., Spijkerman, J. J., Snediker, D. K., Ruegg,

¥.C.,M260-13.

DeVoe,J. R., Spijkerman, J. J., Ruegg, F. C, 9238.

DeVoe,J. R., Spijkerman, J. J., 9444.

DeVoe,J. R., TN404.

DeVoe,J. R., TN421.

DeVoe,J. R., TN428.

deWit, R., Howard, R. E., Hartl, W. F., 9459.

deWit, R., 9445.

deWit, R., 9446.

DiBELER, V. H., Walker, J. A., Liston, S. K., J. 71A 5-467,

371-378(1967).

DiBELER, V. H., Walker, J. A., Rosenstock, H. M., J. 70A

6-417, 459-463 (1966).

DiBELER, V. H., Walker,J. A., 91 94.

DiBELER, V. H., Walker, J. A., Rosenstock, H. M.,

Botter, R.,9281.

Dickson, P. F., Jones, M. C, TN348.

Dickson, R. ^.,9447.

Dienes, G. J., Hatcher, R. D., Smolchowski, R., Wilson,

W. D.,M2«7, p. 11. Dietrich, O. W., Als-Nielsen,J., M273, p. 144. Digges, T. G., Rosenberg, S. J., Geil, G. W., Mono. 88. DiLLER, D. E., 9207.

DiLWORTH, H. C, 9235.

DiMarzio, E. a., Lauritzen, J. I. Jr., Passaglia, E., J. 71A

4-457, 245-259(1967).

DiMarzio, E. A., Passaglia, E., Lauritzen, J. LJr., 9472.

DiMOFF, T.,9297.

Ditmars, D. a., Douglas, T. B., J. 71A 2-438, 89-95 (1967).

Ditmars, D. a., Douglas, T. B., J. 71A 2-439, 97-103 (1967).

Ditmars, D.A., Douglas, T.B., J. 71A 3-450, 185-193 (1967).

Dodge, M.J., Gonshery, M. E., Malitson, L H., 9358.

Dodge, W. R., Coleman, J. A., Domen, S. R., 9298.

Dodge, W. R., Domen, S. R., Leedy, T. F., Skopik, D. M.,

9299.

DoMALSKi, E. S., Armstrong, G. T., J. 71A 4-462, 307-315

(1967).

DoMALSKi, E. S., Armstrong, G. T., J. 71A 2-440, 105-118

(1967).

DoMALSKi, E. S., Armstrong, G. T., J. 71A 3-451, 195-202

(1967).

DoMALSKi, E. S., Armstrong, G. T., 9270.

DoMB,C.,M27i,p.29.

Domen, S. R., Dodge, W. R., Coleman, J. A., 9298.

Domen, S. R., Leedy, T. F., Skopik, D. M., Dodge, W. R., 9299.

Douglas, C. A., Badger, H. L., McSparron, D. A., TN418.

Douglas, T. B., Ditmars, D. A., 7. 71A 2-438, 89-95 (1967).

Douglas, T. B., Ditmars, D. A., J. 71A 2-439, 97-103 (1967).

Douglas, T.B., Ditmars, D.A., J. IIA 3-450, 185-193 (1967).

Douglas, T. B.,9/5i.

Douglas, T. B., 9300.

Douglas, T. B., 9301.

Douglas, T. B., 9302.

Dousset, M., Florin, R. E., Wall, L. A., Sicilio, F., 9775.

Doyama, M., Cotterill, R. M. J., M287, pp. 43, 47. DOYAMA, M., Tosi, M. p., M287, p. 1 7. Dunn, G. H., Van Zyl, B., Zare, R. N., 9171.

Dunn, S. T., Geist, J. C, Moore, D. G., Clark, H. E., Richmond,J. C, TN415.

Dunn, S. T., Richmond,J. C, Parmer,J. F., 9303.

Dunn, S.T., 9757.

Durany, G., Argentar, H., Brauer, G. M., J. 71A 5-468,

379-384 (1967).

DziUBA, R. F., Souders, T. M., 9305.

E

Early.J. G., Utech, H. p., Brower, W. S., 957 J. EcKERLE, K. L., Roberts,J. R., 9388.

Eckert, C. a., Prausnitz,J. M., Renon, H., 9386.

Edelman, S., 9306.

Eden, G. T., Waterstrat, R. M., 9448.

Ederer, D. L., Codling, K., Madden, R. P., 9355.

Edlow, M. H., Plumb, H. H.,y. 70C 4-235, 245-254 (1966).

Edlow, M. H., Plumb, H. H.,J. 71C 1-441, 29-41 (1967).

115
EDMONDS,J.,y. 71B 4-249, 233-240 (1967).

Edmonds,J.,7. 71B 4-250, 241-245 (1967).

Edwards, M. H., M273, p. 82. Edwards, S. F., M273, p. 225.

Ehlert, T. C, Margrave, J. L., Brinckman, F. E., Farrar,

T. C, CoYLE, T. D., TiMMS, P. L., 9229.

EiCKE, W. G., Cameron, J. M., TN430.

ElSENHART, C, 9156.

Eisenhart, C, 9307.

ElSENHAUER, C, 9308.

Ellerbruch, D. a., Little, W. E., J. 70C 3-227, 165-168

(1966).

Engen,G. ¥.,9188.

Englert, a. J., RoBBiNS, D., TN295.

Englert, a. J., RoBBiNS, D., TN437.

Erminy, D. E., 9310.

Esaki, L., Schooley,J. F., Stiles, P. J., 9409.

Evans, E. H., Swanson, H. E., McMurdie, H. F., Morris,

M. C, Mono. 25, Section 5. Evans, W. H., 9309.

EvENSON, K. M., KiLUCHi, T. T., Broida, H. p., 9163.

Evenson, K. M., Shigenari, T., Takuma, H., 9412.

F

Fairbank, W. M., M273, p. 71. Faison, T. K. Jr., Davis, J. C, Achenbach, P. R., BSS12.

Faller, J. W., Farrar, T. C, Brinckman, F. E., Coyle,

T. D., Davison, A., 9449.

Fang, P. H., Brower, W. S., 9434.

Fankhauser, H. R., Blatt, F. J., M287, p. 109. Fano, U., Cohen, H. D., 9293.

Fano, U.,9i/7.

Farabaugh, E. N., Peiser, H. S., Wachtman,J. B.Jr., J. 70A

5-410,379-384(1966).

Faris,J.J.,J. 71C 2-253, 153-170(1967).

Faris, J. L., TscHuiKow-Roux, E., McNesby,J. R., Jackson,

W. M.,9415.

Farrar, T. C, Brinckman, F. E., Coyle, T. D., Davison, A., Faller,J. W., 9449.

Farrar, T. C, Cooper,J., Coyle, T. D., 9450.

Farrar, T. C, Coyle, T. D., Timms, P. L., Ehlert, T. C,

Margrave,J. L., Brinckman, F. E., 9229.

Fatiadi, A.J.,y. 71A 4-459, 277-285 (1967).

Feit, M. D., Huntington, H. B., M287,p. 99. Fenn, R. W., Oser, H., 9228.

Ferraro,J. R., Walker, A., Rush, J. J., 9505.

Fetters, L.J.,J. 70X5-414, 421-433 (1966).

Fetters, L.J., Straus, S., Wall, L. A., 9218.

Fetters, L. J., Wall, L. A., 9254.

Fine,J., Scheer, M. D., 9393.

Firth, I. M., M273, p. 233.

Fisher, M. E., M273, pp. 21, 108. Florin, R. E., Wall, L. A., Sicilio, F., Dousset, M., 91 75. Florman, E. F., TNIOO-A.

Flotow, H. E., Connor, D. W., Thaper, C. L., Rush, J. J., 9506.

Flusser, p.. Spencer, L. \.J. IIB 4-244, 197-211 (1967).

Flynn, D. R.,y. 71C 4-260, 293-298 (1967).

Flynn, D. R., O'Hagan, M. E.,J. 71C 4-258, 255-284 (1967).

Flynn, D. R., Robinson, H. E., Watson, T. W., J. 71C 4-259,

285-291 (1967).

Flynn,J. H., Wall, L. A., J. 70A 6-422, 487-523 (1966 ). Flynn, J. H., Wall, L. A., Morrow, W. L., J. 71A 1-433,

25-31 (1967).

Flynn, J. H., Wall, L. A., 9792.

Flynn, J. H., Wall, L. A., 9451.

Flynn, T. M., Alspach, W. J., Miller, C. E., 9428.

Flynn, T. M., Miller, C. E., Alspach, W. J., 9486.

Ford, N. C.,Jr., Benedek, G. B., M273, p. 150. Forshee, B. W., Graminski, E. L., 9455.

Foster, B. E., 9452.

Foster, H.J., Meijer, P. H. E.,7. 71A 2-443, 127-132 (1967).

Foster, H.J., Meijer, P. H., Mielczarek, E. V., 9197.

Fowler, W. B.,M287,p. 115. Franklin, A. D., Marzullo, S., Wachtman,J. B.Jr., 7. 71A

5-465,355-362(1967).

Franklin, A. D., M287, p. 19. Franklin, A. D., Sparks, D.J.,y. 71A 1-428, 1-2 (1967).

Frederikse, H. p. R., Candela, G. A., 9453.

French, J. L., 9243.

Freshley, W. D., Morgan, W. C, deHalas, D. R., M285, p. 61. Friedel,J., Toulouse, G., M287, p. 141. Frush, H. L., Holt, N. B., Isbell, H. S., J. 71A 2-444, 133-136

(1967).

Frush, H. L.,y. 71A 1-436, 49-52 (1967).

FUKAI, Y.,M287,p. 97. Fukuda, Y., Larsen, S. Y., Kilpatrick,J. E., 9263.

Fuller, E. G., Danos, M., 9216.

Fuller, E. G., Gerstenberg, H. M., TN416.

Furukawa, G. T., Saba, W. G., J. 71A 1-429. 3-8 (1967).

FussELL, W. B., Geist,J. C, 9312.

FussELL, W. B., Stair, R., Schneider, W. E., 9406.

G

Gadsden, M., Williams, H. M., J. 70C 3-226, 159-163 (1966).

Gadsden, M., 9232.

Ganesan, S., Burstein, E., Maradudin, A. A., M287, p. 189. Garcia-Colin, L. S., Green, M. S., 9313.

Garland, C. W., Renard, R., M273, p. 202.

Garner, E. L., Shields, W. R., Catanzaro, E. J., Murphy,

T.S..J. 70X6-416,453-458 (1966).

Gary, R., Bates, R. G., Robinson, R. A., 9770.

Gates, D. M., 9525.

Geil, G. W., Digges, T. G., Rosenberg, S. J., Mono. 88. Geist,J. C, Fussell, W. B., 9312.

Geist, J. C, Moore, D. G., Clark, H. E., Richmond, J. C,

Dunn,S.T., TN415.

Gerstenberg, H. M., Fuller, E. G., TN416.

Ghesquiere,J. D., M291, p. 155. Gilbert, R. L., Wood, R. F., M287, p. 157. Giles, M. A. M., Heinrich, K. F.J., TN406.

Gillilland, K. E., Nefflen, K. F., Zipin, R. B., Mielenz, K.

D., Stephens, R. B.,9799.

GiNNINGS, D. C, NUTALL, R. L., 9241.

Girifalco, L. A.,Jaswal, S. S., M287, p. 55. Glaser, E., Rosenblatt, D., Wood, M. K., 9247.

Glass, S. J., Chappell, W. R., Brittin, W. E., 9250.

Glover, F.,y.71B4-24i, 757-795 (7967).

Gold, X.,M287,p. 111. Goldman, A. J., Newman, M.,y. 70B 3-183, 219-220 (1966).

Goldman, A. J., 9314.

116
GoNSHERY, M. E., Malitson, I. H., Dodge, M.J., 9358.

Goodwin, R. D.,J. 70A 6-425. 541-544 (1966).

Goodwin, R. D.,J. 71A 3-452. 203-218 (1967).

Goodwin, R. D., Roder, H. M., Weber, L. A., 9246.

Gordon, G., Reimann, C. W., Kokoszka, G. F., 9155.

Gordon, G. S.,9315.

GoRNiCK, F., Hoffman,J. D., 9454.

GovLDj.H., 9316.

Graham, L. J., Chang, R., M287, p. 53. Graminski, E. L., Forshee, B. W., 9455.

Gray, A. M., Lang, S. B., 9471.

Green, M. S., Garcia-Colin, L. S., 9313.

Green, M. S., Sengers,J. V., M273.

Greenberg, L., 9317.

Greene, F. M.,J. 71C 1-443,51-57(1967).

Greene, F. M., J. 71C 4-263, 319-326 (1967).

Greene, F. M., TN345.

Greene, F. M.,9318.

Greenspan, M., Tschiegg, C. E., J. 71C 4-261. 299-312

(1967).

Greenspan, M., 9319.

Gregory, T. M., Brown, W. E., Moreno, E. C, J. 70A 6-426. 545-552 (1966).

Greiner, W., Danos, M., Ligensa, R., 9352.

Greiner, W., Huber, M. G., Weber, H. J., Danos, M., 9214.

Greiner, W., Kohr, B. C, Danos, M., 9296.

Grisamore, N. T., Kallet, F. T., M291,p. 105. Grisamore, N. T., M291, p. 155. Groo,E. S.,M284.p. 121. Gross, D., BSSIO.

Grossman,J. W., J. 718 4-242, 183-186 (1967).

Gruzensky,P.M., 9/52.

Gruzensky, p. M., 9320.

Gunn, R. D., Chueh, p. L., Prausnitz.J. M., 9456.

Gupta, H.,J. 71B 4-241, 181-182 (1967).

Gygax, S., Olsen,J. L., Kropschot, R. H., 9240.

H

HABER,S.,9i27.

Hadass, F., M284. p. 53. HadleyJ., M291, p. 149. Halberstadt, M. L., McNesby,J. R., 9322.

Hall,J. L.,9i2i.

Halpern, C, Olsen, L. O., Mono. 27, Supplement 2. Hamer,W.J., 9254.

Hamer.W. J., 9i27.

Handwerk,J. H., Readey, D. W., M285, p. 45. Hanley, H.J. M., Childs, G. E., TN350.

Hanley, H.J. M., Childs, G. E., TN352.

Hanley, H.J. M., Klein, M., TN360.

Hansen, B. B., Lorentzen, H. L., M273. p. 213.

Harari, H., Horn, D., Kugler, M., Lipkin, H. J., Meshkov,S., 9/66.

Hardy, G., Jarvis, S. Jr., 7. 70B 4-188, 265-272 (1966).

Hardy, S. C, Melmed, A. J., 9483.

Hardy, S.C., 9457.

Harman.G.G., 9455.

Harrach, R.J., TN346.

Harrington, R. D., Case, W. E., J. 70C 4-236, 255-262

(1966).

Harrington, R. D., Case, W. E., Schmidt, L. B., /. 71C

1-445,69-75 (1967).

Harrington, R. D., Case, W. E., Schmidt, L. B., 9395.

Harrington, R. D., Rasmussen, A. L., 9196.

Harris, F. K., 9325.

Hartl, W. F., deWit, R., Howard, R. E., 9459.

Hartman,J. E., M288.

Hartmann, W. M.,M287,pp. 179, 181. Hasiguti, R. R., M287. p. 27. Hatcher, R. D., Smolchowski, R., Wilson, W. D., Dienes,

G.J.,M287.p. 11. Hattenburg, a. T., 9326.

Hawkins, E. G., Napolitano, A., M260-11.

Hayes,J. L., M291. pp. 65, 171. Hayward, E., Stovall, T., 92/5.

Hearon,J. Z.J. 71B 2&3-198, 57-60 (1967).

Hearon,J. Z.,J. 11R2&3-199, 61-64 (1967).

Hearon.J. Z.,7. 71B 2&3-200. 65-67 (1967).

Hearon,J. Z.,y. 71B 4-247, 225-228 (1967).

Hearon,J. Z.,J. 71B 4-248, 229-231 (1967).

Heckelmann, R. p., M291,p. 17. Heinrich, K. F. J., Giles, M. A. M., TN406.

Heinrich, K. F.J., TN278.

Heller, P.,M273,p.58.

Henderson, M. M., TN297.

Herber, R. H., Spijkerman,J., 9206.

Herman, R. M., M291, p. 150. Herron,J.T., 9i2«.

Herron,J.T., 9529.

Herzberg, G., Simmons, J. D., Bass, A. M., Tilford, S. G.,

9330.

Hess, A. E., J. 70C 3-228, 169-172 (1966).

Hetzer, H. B., Bates, R. G., Robinson, R. A., 9460.

Heydemann, p. L. M., Houck, J. C, J. 71C 1-439, 11-17

(1967).

Heydemann, P. L. M., 9331.

Heydemann, P. L. M., 9526.

Hirschkoff, E. C, Wolcott, N. M., 92/9.

HiZA, M.J., KiDNAY, A. J., 9230.

HiZA, M.J., Kidnay, A. J., 9461.

Ho, C. Y., Liley, p. E., Powell, R. W., NSRDS-NBS8.

Hoer, C. a.. Love, C. H., Brooke, R. L.,J. 71C 1-444, 59-67

(1967).

Hoer, C. A., Smith, W. L., J. 71C 2-249, 101-109 (1967).

Hoffman, A.J.,y. 71B 1-195, 39-41 (1967).

Hoffman, J. D., Gornick, F., 9454.

Hoffman,J. D., Williams, G., Passaglia, E., 9462.

Holmes, W. R.,M291,pp. 175, 185. Holt, H. K., Menendez, M. G., 9365.

Holt, N. B., Isbell, H. S., Frush, H. L.,J. 71A 2-444, 133-136

(1967).

HoMAN, D.N., J. 70C 4-233, 221-226 (1966).

HoRD.J., rA^i55.

Hord,J., rA^i56.

HoRD,J., 9463.

Horman, J. A., Bestul, A. B., Chang, S. S., J. 71A 4-461,

293-305(1967).

Horn, D., Coyne,J.J., Meshkov, S., Carter,J. C, 9332.

Horn, D., Kugler, M., Lipkin, H. J., Meshkov, S., Harari, H., 9/66.

Horn, L., 9258.

HORTON, W. S.,y. 7Q\6-424, 533-539, (1966).

Hoskins, M., M291, p. 150. HosLER, W. R., Schooley,J. F., Ambler, E., Colwell,J. H.,

9269.

117
HoucK, J. C Heydemann, p. L. M., J. 71C 1-439, 11-17

(1967).

HouTGAST.J., Moore, C. E., Minnaert, M. G.J., Mono. 61. Howard, R. E., Hartl. W. F., deWit, R., 9459.

Howard, R. E., Manning, J. R., 9464.

HuBER, M. G., Weber, H. J., Danos, M., Greiner, W., 9214.

Hudson, P. A., Crawford, M. L., J. 71C 2-250. 111-117

(1967).

Hudson, P. A., 9333.

Hudson, R. P., Kaeser, R. S., 9334.

Hudson, R. P., Mangum, B. W., 9236.

Hughes, A. J., Callaway,J., M287, p. 131. Humphrey, H. H., M284, p. 67. Huntington, H. B., Feit, M. D., M287, p. 99. Huntington, H. B., M287, p. 35. HUNTOON, R. D., M291,p. 89. Hyland, R. W., Mason, E. A., J. 71A 3-454, 219-224 (1967).

I

Iglesias, L.,y. 70A 6-418, 465-466 (1966).

Ingberg, S. H., Shoub, H., /. Ingraham, H. S.,Jr., M291 , p. 23. IsBELL, H. S., Frush, H. L., Holt, N. B.,J. 71A 2-444. 133-136

(1967).

ISBELL, H. S., TN405.

Isbell, H. S., Wade, C. W. R.J. 71A 2-445, 137-148 (1967).

Ives, L. K., Ruff, A. W.Jr., 9501.

Ives, L. K., Ruff, A. W.Jr., 9502.

J

Jackson, W. M., Faris,J. L., Tschuikow-Roux, E., McNesby,

J. R., 94/5.

Jacobson, R. a., Mighell, A. D.,y. 10X4-407, 319-321(1966).

Jacox, M. E., Comeford,J.J., Milligan, D. E., 9368.

Jacox, M. E., Milligan, D. E., 9335.

Jacox, M. E., Milligan, D. E., 9369.

James, L. W., Tantilla, W. H., Mahler, R. J., 9356.

James, L. W., TN344.

Janes, H. B., Thompson, M. C. Jr., TN339.

Jarvis,S. Jr., Hardy, G.,7.70B4-/««, 265-272 (1966).

Jaswal, S. S., Girifalco, L. A., M287, p. 55. Jefferies, J. T., 9259.

Jenkins, W. D., Willard, W. A., J. 70C 3-231. 195-205

(1966).

Jespersen,J. L., TN357.

Johnson, C.,M297, p. 99. Johnson, V.J., 9255.

Johnson, R. A.. M287. p. 39. Jones, F. E.,J. 71C 3-255. 199-207 (1967).

Jones, M. C, Dickson, P. F., TN348.

Jones, M. W., Bowman, H. A., Schoonover, R. M., J. 71C

3-254. 179-198(1967).

Joseph, J. A., M294.

Judd, D. B.,9762.

JUDD, D.B.,9336.

Julie, L., A/29/, p. 109. K

Kaeser, R. S., Hudson, R. P., 9334.

Kallet, F. T., Grisamore, N. T., M291, p. 105.

Kanagy,J. R.,9465.

Kanagy,J. R., 9466.

KANZAKi,H.,M287,p.23.

Karim, a. I. A., J. 718 2&3-204, 91-103 (1967).

Katsura, S., Tsujiyama, B., M273, p. 219.

Kaufman, V., Radziemski, L.J. Jr., Andrew, K. L., 9337.

Kaufman, V., Sugar,J., J. 11A6-474, 583-585 (1967).

Kaufman, V., Ward, J. F., 9338.

Kaufman, V., Ward,J. F., 9339.

Keller, R., Breen, D., 9178.

Kelley, D. L., Kelly, F. J., Richmond.J. C, Kneissl, G.J.,

TN292.

Kelly, F. J., Richmond, J. C, Kneissl, G.J., Kelley, D. L., rA'292.

Kerper, M. K., Scuderi, T. G., 9227.

Kessler, H., Winogradoff, N. N., 9468.

Kessler, H. K., Winogradoff, N. N., 9518.

Kessler, H. K., 9467.

Kidnay, A.J., HiZA, M.J., 9230.

KiDNAY, A.J., HiZA, M.J., 9461.

Kieffer, L.J., M2«9.

Kierstead, H. a., M273. p. 92. KiLPATRiCK,J. E., Boyd, M. E., Larsen, S. Y., 9282.

KlLPATRICK,J. E., FUKUDA, Y., Larsen, S. Y., 9263.

KiLUCHi, T. T., Broida, H. P., Evenson, K. M., 9163.

KiNARD,J. R.Jr., Scott, A. H.,7. 71C 2-251. 119-125 (1967).

KiRBY, R. K.,J. 71X5-466. 363-369 (1967).

KiRBY, R. K.. Rothrock, B. D.,y. 71C 2-247. 85-91 (1967).

KiRSTEiN, A. F., Pell, W. H., Woolley, R. M., Davis, L. J.,

J. 70C 4-234. 227-244 (1966).

KiRSTEiN, A. F., TN435.

KiRSTEiN, A. F., Woolley, R. M.J. 71C 1-438, 1-10 (1967).

Klein, M., Hanley, H.J. M., TN360.

Klein, R., Little,J. W., 9340.

Kloss, K., Marron, B. a., deMaine, P. A. D., TN413.

Kneissl, G. J., Kelley, D. L., Kelly, F.J., Richmond, J. C,

TN292.

Knight,J. M., 0'Connell,J. S., Prats, F., 9341.

Knopp, M., Newman, M., 9164.

Knopp, M. l.J. 71B 4-239. 167-169 (1967).

Knoppers, a., M284, p. 141

Koehler, J. S., M287, p. 59. KoHR, B. C, Danos, M., Greiner, W., 9296.

Koidan,W., 9i42.

Kokoszka, G. F., Gordon, G., Reimann, C. W., 9/55.

Kostkowski, H.J., 9343.

Kostkowski, H.J., 9344.

Krauss, M., Mies, F. H.. 9366.

Krauss, M., TN438.

Kropschot, R. H., Gygax, S., Olsen,J. L., 9240.

Kruger.J., Calvert.J. P., 9469.

Kruger,J., Yolken, H. T., Waxler, R. M., 9522.

Krumhansl, J. A., M287. p. 135. Krupenie, p. H., NSRDS-NBS5.

Ku, H. H.,y. 70C 4-237. 263-273 (1966).

KuBiCEK,G.,M29/,p. S7. KuczKowsKi, R. L., 9253.

KuGLER, M., LiPKiN. H. J.. Meshkov, S., Harari, H.,

Horn, D., 9/66.

KuLiN, G., Middleton, H. K., M280.

Kurosawa, T., M287. p. 21. Kusuda, T.J. 71C 1-442. 43-50 (1967).

KuYATT, C. E., Simpson,J. a., 9405.

118
L

Lady, R. M.M291,p. 105. Lamperti, p., Petree, B.,7. 71C 1-440, 19-27 (1967).

Lance, H.W.,M29/,p. 113. Landgrebe, a. R., McClendon, L. T., DeVoe,J. R., 9168.

Lang, S. B., Gray. A. M., 9471.

Lang, S. B.,9470.

LaQue, F. L.,M284,p.55.

Larsen, S. Y., Boyd, M. E., TN412.

Larsen, S. Y., Kilpatrick,J. E., Fukuda, Y., 9263.

Larsen, S. Y., Kilpatrick,J. E., Boyd, M. E., 9282.

Laun, D. D.,y. 70X4-408, 323-324 (1966).

Lauritzen,J. LJr., DiMarzio, E. A., Passaglia, E., 9472.

Lauritzen,J. LJr., Passaglia, E., DiMarzio, E. A., J. 71A

4-457, 245-259(1967).

Lauritzen, J. L Jr., Passaglia, E., J. 71A 4-458, 261-275

(1967).

LaVilla, R. E., Deslattes, R. D., 9443.

LaVilla, R. E., Deslattes, R. D., 9473.

LaVilla, R. E., Mendlowitz, H., 9345.

Lederer,P.S.,TN411.

Lederer, P. S., TN434.

Ledford, a. E. Jr., Braun, W., Bass, A. M., 9287.

Lee, R. D., Lewis, E., 9346.

Lee, R. D.,9347.

Leedy, T. p., Skopik, D. M., Dodge, W. R.. Domen, S. R., 9299.

Lehner,J., Newman, M., 9348.

Lemos, a. M., M287, p. 133. Leung, P. S., Taylor, T. L, Rush, J. J., 9504.

Levin, B. M., Schoefer, R. E., 9474.

Levin, E. M.,9475.

Levin, E. M.,9476.

Levin, \. W., Abramowitz, S., 9268.

Levin, L W., Abramowitz, S., 9349.

Levy, P. V/., M285, p. 21

Lewis, E., Lee, R. D., 9346.

Lias, S. G., Ausloos, P., Scala, A. A., 9273.

Lias, S. G., Ausloos, P., Scala, A. A., 9392.

Lias, S. G., Ausloos, P., 9180.

Lias, S. G., Ausloos, P., 9272.

LiCHTENSTEIN, S., 9350.

LiCHTENSTEIN, S., 9351.

LiDE, D. R., 9204.

LiDE, D. R. Jr., Maryott, A. A., Nelson, R. D. Jr.,

! NSRDS-NBSIO.

LiDE, D. R.Jr., Powell, F. X , 9i50.

LiDiARD, A. B., Boswarva, L M., M287, p. 7.

: Lidiard, a. B., M285, p. 7; M287, p. 61.

\ LiGENSA, R., Greiner, W., Danos, M., 9352.

\ Lightbody,J. W., Penner, S., 9200.

\ LiLEY, p. E., Powell, R. W., Ho, C. Y., NSRDS-NBS8.

Lincoln,J. V.,9/8/.

Linebrink, O. L., M291, p. 71

Linnig, F.J., Stewart,J. E.,J. 71A 1-432, 19-23 (1967).

Linnig,F.J., 9477.

LiPKiN, H. J., Meshkov, S., Harari, H., Horn, D.,

Kugler, M.,9/66.

LiPKiN, H.J., Rubinstein, H. R., Meshkov, S., 9353.

LiSTON, S. K., Dibeler, V. H., Walker, J. A., J. 71A 5-467,

371-378(1967).

Little, C. G., Booker, H. G.. 9158.

LiTTLE.J. L., Stevens, M. E., Mono. 99. Little,J. W., Klein, R., 9340.

Little, W. A., Moldover, M. R., M273, p. 79. Little, W. E., Ellerbruch, D. A., J. 70C 3-227, 165-168

(1966) . Logan, H. L., McBee, M.J., 9479.

Logan, H. L., Wehrung,J. M., 9478.

Lorentzen, H. L., Hansen, B. B., M273, p. 213.

Love, C. H., Brooke, R. L., Hoer, C. A., J. 71C 1-444, 59-67

(1967) . Love,C. H. , J. 70B4-I86. 249-256 (1966).

Love, C. H., Mono. 98. Lowrie, p. H. Jr.,7. 70C i-229. 173-185 (1966).

LOWRIE, P. H.jR.,9/«4.

Lowry, R. E., Brown, D. W., Wall, L. A., 9257.

Ludwig, W., Dettmann, K., M287, p. 185. LuDWiG, W.,M2«7,p. 151. M

MacDonald, R. a., 9354.

Macedo, p. B., Napolitano, A., J. IW 3-456, 231-238 (1967).

Madden, R. P., Codling, K., 9208.

Madden, R. P., Ederer, D. L., Codling, K., 9355.

Madey, T. E., Yates.J. T.Jr., 9421.

Maeda, K., Young,J. M., 9186.

Mahler, R. J. .James, L. W., Tantilla, W. H., 9356.

Mahler, R.J., 9357.

Major, R.,M284,p. 76. MakuA.G.,9183.

Malitson, L H., Dodge, M.J., Gonshery, M. E., 9358.

Malitson, L H., 9190.

Mangum, B. W., Hudson, R. P., 9236.

Mann, D. B., Sindt, C. F., TN343.

Mann, D. E., Acquista, N., White, D., 9359.

Mann, E., Seeger, A., M287, p. 75. Manning,J. R., Howard, R. E., 9464.

Maradudin, a. a., Ganesan, S., Burstein, E., M287, p. 189. Marantz, S., Armstrong, G. T., 9360.

March, N. H., Oli, B., M287, p. 69. Marcus.J. H., Ormsby, W. C, 9491.

Margoshes, M., Scribner, B. F., 9481.

Margoshes, M., 9361.

Margrave, J. L., Brinckman, F. E., Farrar, T. C, Coyle,

T. D.,TiMMS. P. L.,Ehlert,T.C., 9229.

MARRON, B. a., Boltosky, G. R., Tauber, S. J., 9482.

Marron, B. a., deMaine, P. A. D., Kloss, K., TN413.

Marshak, H., Richardson, A. C. B.,Tamura,T., 9362.

Marshall, W., M273, p. 135. Marton, L., 9363.

Maryott, A. A., Nelson, R. D. Jr., Lide, D. R. Jr., NSRDS-NBSIO.

Marzullo, S., Wachtman,J. B. Jr., Franklin, A. D.,y. 71

5-465,355-362 (1967).

Mason, E. A., Hyland, R. W., J. 71A 3-454. 219-224 (1967).

Mason, H. L.,M297,p. 74. Matheson, H., 9364.

Mavrodineanu, R., M281.

Maximon, L. C, Caswell, R. S., TN409.

Mazur,J.,Wims, A. M.,y. 70A6-419, 467-471 (1966).

McAlister, a. J., Williams, M. L., Cuthill,J. R., 9442.

McBee, M.J., Logan, H. L., 9479.

119
McCallum, W. B., M29I,p. 57. McCamy,C. S.,9i72.

McCamy, C. S., 9373.

McClelland, A., Tan. J. L., Rankin, B. K. Ill, Siegel, S., TN296.

McClendon, L. T., DeVoe, J. R., Landgrebe, A. R., 9168.

McCoMBiE, C. W., M287, p. 195. McCuNE, F., M284, p. 39. McDaniel, C. L., Schneider, S. J., J. 71 A 4-463, 317-333

(1967).

McDaniel, C. L., Schneider, S. J., J. 71A 2-441, 119-123

(1967).

McDaniel, C. L., Schneider, S.J., 9480.

MclNTYRE, D., J. 71A 1-435, 43-47 (1967).

McIntyre, D., O'Mara, J. H., Story, V. M., J. 71A 2-449,

169-175 (1967).

McKiNLEY,J. D., Scheer, M. D., 9394.

McKinley,J. D.,9374.

McKiNNEY,J. E.,y.71Ci-257, 227-238(1967).

McLuhan, M., p. 9. McMuRDiE, H. F., Morris, M. C, Evans, E. H., Swanson,

H. E.,Mono. 25 . Section 5

McNesby,J. R., Braun, W., Welge, K. H., 9286.

McNesby,J. R., Halberstadt, M. L., 9322.

McNesby, J. R., Jackson, W. M., Faris, J. L., TscHUiKOW-Roux, E., 9415.

McNesby,J. R.,Tschuikow-Roux, E., 9414.

McNiSH, A.G.,920i.

McPhee,W. H.,M291,p. 159. McSparron, D. a., Douglas, C. A., Badger, H. L., TN418.

Meggers, W. F., Corliss, C. H., Bozman, W. R.,y. 71A 6-471,

547-565 (1967).

Meggers, W. F., Moore, C. E.. J. 71A 6-470. 396-545 (1967).

Mehr, C. B., Shisha, O J. 718 7-792, 79-20 (7967).

Meuer, p. H., Mielczarek, E. V., Foster, H.J., 9797.

Meijer, p. H. E., Foster, H. J., J. 71A 2-443, 127-132 (1967).

Meinke, W. W., Scribner, B. F., Mono. 100. Melmed, a. J., Hardy, S. C, 9483.

Melmed, A. J. ,9484.

Mendlowitz, H.,J. 71A 2-446, 149-156 (1967).

Mendlowitz, H., LaVilla, R. E., 9345.

Menendez, M. G., Holt, H. K., 9365.

Menendez, M. G., Mielczarek, S. R., Simpson, J. A., 9404.

Menis, O., SterlincJ. T., M260-14.

Menis,0., TN402.

Meshkov, S., Carter,J. C, Horn, D., Coyne,J.J., 9332.

Meshkov, S., Harari, H., Horn, D., Kugler, M., Lipkin, H. J., 9766.

Meshkov, S., Lipkin, H.J., Rubinstein, H. R., 9353.

Meshkov, S., Yodh, G. B., Coyne,J. J., 9295.

Mesztenyi, C, Witzgall, C.,y. 71B 7-797, 11-17(1967).

Metzger, W. H. Jr., Brenner, A., Salmon, H. I., 9485.

Meyers, L. F., 9205.

Meyers, P. R.J. 718 7-79i, 27-22 (7967).

Meyers, P. R.J. 718 2& 3-202, 73-76 (1967).

Meyers, V. W., Carter, R. S., Muehlhause, C. O., 9435.

Michaelis, R. E., Yakowitz, H., Vieth, D. L., M260-12.

MiDDLETON, H. K., Kulin, G., M280.

Mielczarek, E. V., Foster, H.J., Meijer, P. H., 9797.

Mielczarek, S. R., Simpson, J. A., Menendez, M. G., 9404.

MiELENZ, K. D., Stephens, R. B., Gillilland, K. E., Nefflen, K. F., Zipin, R. B., 9799.

Mies, F. H., Krauss, M., 9366.

Mies, F. H., Smith, A. L., 9367.

MiGHELL, A. D.,Jacobson, R. A., J. 70\ 4-407, 319-321(1966).

Mikesell, R. p.. Reed, R. P., J. 70C 3-232, 207-210 (1966)

MiKESELL, R. P., Reed, R. P., Mono. 101. Miller, C. E., Alspach, W.J., Flynn, T. M., 9486.

Miller, C. E., Flynn, T. M., Alspach, W. J., 9428.

MiLLiGAN, D. E.,Jacox, M. E., 9335.

MiLLiGAN, D. E.,Jacox, M. E., Comeford,J.J., 9368.

MiLLiGAN, D. E.,Jacox, M. E., 9369.

Milne, G. S., Trotman-Dickenson, A. F., NSRDS-NBS9.

MiNNAERT, M. G.J., Houtgast.J., Moore, C. E., Mono. 61. MOFFITT,J. K.,H103.

MOFFITT,J. K.,H104.

Moldover, M. R., Little, W. A., M273, p. 79. MoND, B., Shisha, 0.,y. 708 3-182, 211-218 (1966).

Moore, C. E., Meggers, W. F., J. 71A 6-470, 396-545 (1967).

Moore, C. E., Minnaert, M. G.J., Houtgast.J., Mono. 61. Moore, C. E., NSRDS-NBS3, Section 2. Moore, C.E., 9270.

Moore, D. G., Clark, H. E.,y. 70A 5-412, 393-415 (1966).

Moore, D. G., Clark, H. E., Richmond, J. C, Dunn, S. T., Geist,J. C, TN415.

Moore, E. B.,Jr., M287, p. 31. MoPSiK, F. I. J. 71A 4-460, 287-292 (1967).

MopsiK, F. I., 9242.

MoRDFiN, L., J. 71C 3-256, 209-225 (1967).

Moreno, E. C, Gregory, T. M., Brown, W. E., J. 70A 6-426,

545-552 (1966).

Morgan, A. H., Blair, B. E., TN341.

Morgan, W. C, deHalas, D. R., Freshley, W. D., M285, p. 61. Morris, M. C, Evans, E. H., Swanson, H. E., McMurdie,

H. F., Mono. 25, Section 5. Morrow, W. L., Flynn, J. H., Wall, L. A., J. 71A 1-433. 25-31 (1967).

Mosburg, E. R.jR.,9i77.

MozER,B.,M287,p. 101. Muehlhause, C. O., Meyers, V. W., Carter, R. S., 9435.

Muehlhause, C. O., M285, p. 1. Muhlenhaupt, R. C, Strobridge, T. R., TN354.

Mundy, R. E., Candela, G. A., 9297.

Murdock.J. W., M297, p. 182. Murphy, T. J., Garner, E. L., Shields, W. R., Catanzaro,

E. J.J. 70A 6-416. 453-458 (1966).

Myers.J. R.,M297,p. 769.

N

Napolitano, a., Hawkins, E. G., M260-11.

Napolitano, a., Macedo, P. B., J. 1\A 3-456, 231-238 (1967).

Nardelli, G. F., Benedek, G., M287, p. 161. Nefflen, K. F., Zipin, R. B., Mielenz, K. D., Stephens,

R. B., Gillilland, K. E., 9799.

Nelson, R. D. Jr., Lide, D. R. Jr., Maryott, A. A., NSRDS-NBSIO.

Newman, M., Goldman, A. J., 7. 708 3-183, 219-220 (1966).

Newman, M.J. 718 7-790, 9-10 (1967).

Newman, M.J. 718 2&3-20I. 69-71 (1967).

Newman, M.J. 718 4-240, 171-179 (1967).

Newman, M.J. 71B4-251, 247-248 (1967).

Newman, M., Knopp, M., 9164.

120

r
Newman, M., Lehner.J., 9348.

Newman, M., 9375.

Newman, S. B.,9487.

Newman, S. B.,9488.

NOH, K., Yu.H.,94S9.

Norton, M.T., 9/57.

NossAL,R., 9i76.

NUTALL, R. L., GiNNINGS, D. C, 924].

I o

0'CoNNELL,J. S., Prats, F., Knight,J. M., 9341.

Ogburn, F., Schlissel, M., 9490.

O'Hagan, M. E., Flynn, D. R.,y. 71C 4-258. 255-284 (1967).

Okada, K., Yamamoto, T., Tanimoto, O., Yasuda, Y., M273.P. 86. Oli, B., March, N. H., M287, p. 69. Olsen,J. L., Kropschot, R. H., Gygax, S., 9240.

Olsen, L. O., Halpern, C, Mono. 27, Supplement 2. Olver, F. W.J.,y. 71B 2&3-206, 111-129 (1967).

Olver, F. W.J.,7. 11B4-238. 161-166 (1967).

O'Mara, J. H., Story, V. M., McIntyre, D., J. 71A 2-449,

169-175(1967).

Opik, U., Wood, R. F., M287, p. 119. Ordway, F. D., 9202.

Ormsby, W. C, Marcus, J. H., 9491.

OSER, H., CORIELL, S. R., SlMMONS,J. A., 9508.

OsER, H., Fenn. R. W., 9228.

Otto, E. M., 9377.

P

Paabo, M., Bates, R. G., Robinson, R. A., 9492.

Paabo, M., Robinson, R. A., Bates, R. G., 9493.

Paffenbarger, G. C, Sweeney, W. T., Bowen, R. L., 9494.

Paffenbarger, G. C, 9495.

Parker, H. S., Brower, W. S., 9496.

Parker, R. L., Coriell, S. R., 9439.

Parmer,J. F., Dunn, S. T., Richmond,J. C, 9303.

Passaglia, E., Crissman,J. M., 9441.

Passaglia, E., DiMarzio, E. A., Lauritzen, J. I. Jr., J. 71A

4-457, 245-259(1967).

Passaglia, E., Hoffman,J. D., Williams, G., 9462.

Passaglia, E., Lauritzen, J. I. Jr., J. 71A 4-458, 261-275

(1967).

Passaglia, E., Lauritzen,J. LJr., DiMarzio, E. A., 9472.

Passaglia, E., Shouse, P. J., M260-15.

Passell, L.,M27i,p. 143. Peavy, B. A.,y. 71B 2&3-207, 131-141 (1967).

Peavy, B. A.,y. 71C 2-248, 93-100 (1967).

Peccei, A., M284, p. 126. Peiser, H. S., Wachtman,J. B. Jr., Farabaugh, E. N., J. 70A

5-410,379-384(1966).

Pell, W. H., Woolley, R. M., Davis, L. J., Kirstein, A. F.,

J. IQC 4-234,22 7-244 (1966).

Penner, S., Lightbody,J. W., 9200.

Perloff, a.. Block, S., Robbins, C, J. 70A 5-411, 385-391

(1966).

Perloff, A., Reimann, C. W., Block, S., 9499.

Peterson, E. L.,J. nB2&3-205, 105-110(1967).

Peterson, P. G., M284, p. 83. Peterson, R. L., Mono. 102.

Petree, B., Lamperti, P., J. 71C 1-440, 19-27 (1967).

Peyser, P., Tutas, D.J., Stromberg, R. R., 9378.

Pfeffer, a. M.,y. 70B 3-184. 221-231 (1966).

PiTTS,J. W., 9497.

Plumb, H., Cataland, G., 9379.

Plumb, H. H., Edlow, M. H., J. 70C 4-235, 245-254 (1966).

Plumb, H. H.. Edlow, M. H.,y. 71C 1-441, 29-41 (1967).

Pontius, P. E., Cameron,J. M., Mono. 103. Porter, E. L., M291,p. 73. Powell, ¥.i.,9498.

Powell, F. X., Lide, D. R.Jr.. 9380.

Powell, R.C.,9J57.

Powell, R. W., Ho, C. Y., Liley, P. E., NSRDS-NBS8.

Powers, R. S.Jr., 95«2.

Prats, F., Knight.J. M., 0'Connell,J. S., 9341.

Prausnitz,J. M., Gunn, R. D., Chueh, P. L., 9456.

Prausnitz,J. M., Renon, H., Eckert, C. A., 9386.

Proctor, T. M.Sk.,9383.

Q

QuiNN,J.B.,M2S4,p. 98.

R

Radebaugh, R., TN362.

Radziemski, L.J. Jr., Andrew, K. L., Kaufman, V., 9337.

Ragab, F. U.J. 71B 1-194. 23-37(1967).

Ragab, F. M.,y. 71B 2&3-203, 77-89 (1967).

Rankin, B. K. Ill, Siegel, S., McClelland, A., Tan, J. L.. TN296.

Rao, V. K. R. V., M284, p. 104. Rasmussen, a. L., Harrington, R. D., 9796.

Reader,J., Davis, S. P.,y. 71A 6-475, 58 7-599 (1967).

Reader,J., Sugar,J., 9384.

Readey, D. W., Handwerk,j. H., M285, p. 45. Rebbert, R. E., Ausloos, P.J., 9385.

Reed, R. P., Mikesell, R. P.,y. 70C 3-232, 207-210 (1966).

Reed, R. P., Mikesell, R. P., Mono. 101. REiD,G.C.,979i.

Reid,G.C., 9252.

Reimann, C. W., Block, S., Perloff, A., 9499.

Reimann, C. W.,y. 70A 5-413, 417-419 (1966).

Reimann, C. W., Kokoszka, G. F., Gordon, G., 9755.

Reimann, C. W., Sharnoff, M., 9797.

Renard, R., Garland, C. W., M273, p. 202.

Renon, H., Eckert, C. A., Prausnitz,J. M., 9386.

Reynolds,J. E., M284, p. 25. Reynolds, W.,M297, p. 770. Richardson, A. C. B., Tamura, T., Marshak, H., 9362.

Richardson,J. M., Brockman,J. F., 9387.

Richardson, S. C, M291, pp. 13, 14. Richmond, J. C, Dunn, S. T., Geist, J. C, Moore, D. G.,

Clark, H. E., 7'A'475. Richmond, J. C, Kneissl, G. J., Kelley, D. L., Kelly, F.J., rA'292.

Richmond,J. C, Parmer,J. F., Dunn, S. T., 9303.

Rikli, a. E., Allen, S. L, Alexander, S. N., 9500.

Riordan,J.J., Brzezinski, C.J., M291 ,p. 115. Robbins, C, Perloff, A., Block, S., J. 70A 5-411. 385-391

(1966).

Robbins, D., Englert, A.J., TN295.

313-589 0-69—

121
RoBBiNS, D., Englert, A.J., rN-^i?.

Roberts, B. W., TN408.

Roberts, D. E.,y. 71 A 3-455, 225-229 (1967).

RoBERTS,J. R., Eckerle, K. L., 9388.

Robertson, A. P., 9176.

Robinson, H. E., Watson, T. W., Flynn, D. R., J. 71C 4-259,

285-291 (1967).

Robinson, R. A., Bates, R. G., J. 70A 6-427, 553-556 (1966).

Robinson, R. A., Bates, R. G., Steel, B. J.,7. 71A 1-430, 9-12

(1967).

Robinson, R. A., Bates, R. G., Covington, A. K., 9440.

Robinson, R. A., Bates, R. G., Paabo, M., 9493.

Robinson, R. A., Bower, V. E.,J. 70A 4-405, 305-311 (1966).

Robinson, R. A., Bower, V. E., J. 70A 4-406, 313-318 (1966).

Robinson, R. A., Gary, R., Bates, R. G., 9170.

Robinson, R. A., Hetzer, H. B., Bates, R. G., 9460.

Robinson, R. A., J. UK 3-453, 213-218 (1967).

Robinson, R. A.J. 71X5-469, 385-389 (1967).

Robinson, R. A., Paabo, M., Bates, R. G., 9492.

Robinson, R. A., Stokes, R. H., 9512.

Roder, H. M., Weber, L. A., Goodwin, R. D., 9246.

Rosco, R. G.,M29/,p. 759.

Rose, F. C, Cornog, D. Y., M262-2.

Rosenberg, S. J., Geil, G. W., Digges, T. G., Mono. 88. Rosenblatt, D., Wood, M. K., Glaser, E., 9247.

Rosenstock, H. M., Botter, R., Dibeler, V. H., Walker,

J. A.. 9281.

Rosenstock, H. M., Dibeler, V. H., Walker, J. A., J. 70A

6-417, 459-463(1966).

Roth, R. S., Waring, J. L.,J. 70A 4-404, 281-303 (1966).

Rothrock, B. D., Kirby, R. K.,y. 71C 2-247, 85-91 (1967).

Rowlinson,J. S., M273, p. 9. Rozner, a. G., Spinner, S., 9511.

Rubin, R.J.,y. 70B 4-185, 237-247 (1966).

Rubin, R.J., Ullersma, P., 9389.

Rubinstein, H. R., Meshkov, S., Lipkin, H. J., 9353.

RuEGG, F. C, DeVoe, J. R., Spijkerman, J. J., Snediker,

D. K.,M260-I3.

RuEGG, F. C, DeVoe,J. R., Spijkerman, J.J. , 9238.

Ruegg, F. W., Allion, H. H., 9390.

Ruff, A. W.Jr., Ives, L. K., 9501.

Ruff, A. W.Jr., Ives, L. K., 9502.

RuPKEY, R. H.,M29/,p.S5.

Rush, J. J., Ferraro,J. R., Walker, A., 9505.

Rush, J. J., Flotow, H. E., Connor, D. W., Thaper, C. L., 9506.

RusH,J. J., Leung, P. S., Taylor, T. I., 9504.

Rush,J.J., 9503.

Rushmer, M. a., 9223.

Russell, F. C, M291, p. 121.

s

Saba, W. G., Furukawa, G. T.J. 71A 1-429, 3-8 (1967).

Salmon, H. I., Metzger, W. H.Jr., Brenner, A., 9485.

Santoro, a., Zocchi, M., 9524.

Sauder, W. C, Deslattes, R. D., J. 71A 5-464, 347-353

(1967).

Saunders,J. B., 9231.

ScALA, A. A., AusLoos, p., 9391.

ScALA, A. A., Lias, S. G., Ausloos, P., 9273.

ScALA, A. A., Lias, S. G., Ausloos, P., 9392.

SCHAFFER, R., TN427.

Schafft, H. a., TN431.

ScHEER, M. D., Fine,J., 9393.

Scheer, M. D., McKinley,J. D., 9394.

Schlissel, M., Ogburn, F., 9490.

Schmidt, E. H. W., M273, p. 13. Schmidt, L. B., Harrington, R. D., Case, W. E., J. 71C

1-445,69-75 (1967).

Schmidt, L. B., Harrington, R. D., Case, W. E., 9395.

ScHNEiDE, W. L., M291,p. 159. Schneider, S. J., McDaniel, C. L., J. 71 A 4-463, 317-333

(1967).

Schneider, S. J., McDaniel, C. L., J. 71A 2-441, 119-123

(1967).

Schneider, S.J., McDaniel, C. L., 9480.

Schneider, W. E., Fussell, W. B., Stair, R., 9406.

Schneider, W. E., Stair, R., 9256.

Schoefer, R. E., Levin, B. M., 9474.

Schoen, L.J., 9396.

Schooley, J. F., Ambler, E., Colwell,J. H., Hosler, W. R., 9269.

Schooley, J. F., Stiles, P.J., Esaki, L., 9409.

Schooley, J. F., Thurber, W. R., 9397.

ScHOONOVER, R. M., Jones, M. W., Bowman, H. A.. J. 71C

3-254,179-198(1967).

ScHRACK, R. A., 9398.

ScHULTZ, M., Weiss, G. H., Billick, I. H.J. 71A 1-431, 13-17

(1967).

ScHwerdtfeger, W. J . , y. 70C 3-230, 187-194(1966).

SCIACCHITANO, F. J., M291,p. 71. Scott, A. H., Kinard,J. R.jR.,y. 71C 2-251, 1 19-125 (1967).

Scott, A. H., 9 174. Scott, A. H., 9/9S.

Scott, W. W.Jr., TN347.

Scott, V^. W. Jr., TN349.

Scribner, B. F., Margoshes, M., 9481.

ScRiBNER, B. F., Meinke, W. W., Mono. 100. Scribner, B. F., TN401.

Scuderi, T. G., Kerper, M. K., 9227.

Seeger, a., Mann, E., M287, p. 75. Seitz, F., M284, p. 7. Selby, M. C, Blank, W. J., Chariton, R. P., 9266.

Sengers,J. v.. Green, M. S., M273.

Sengers,J. v., M27i, p. 765. Sengers,J. v., 9399.

Sengers,J. v., 9400.

SETTE,D.,M273,p. 183. Shadmi, Y.J. 70A 5-415, 435-445 (1966).

Shafer, A. B.,9407.

Shapley, a. H., Beynon, W.J. G., 9267.

Shapley, A. H.,9189.

Shapley, A.H., 92ii.

Sharnoff, M., Reimann, C. W., 9797.

Sharpe, D. B., M291,pp. 67, 69. Sharpston, C. H., M284, p. 61. Sherman, R. H., M273, p. 7. Shields, W. R., Catanzaro, E. J., Murphy, T. J., Garner,

E. L.J. 70A 6-416, 453-458 (1966).

Shields, W. R., TN277.

Shields, W. R., TN426.

Shigenari, T., Takuma, H., Evenson, K. M., 9412.

Shimanouchi, T., NSRDS-NBS6.

Shimanouchi, T., NSRDS-NBSU.

122
Shisha, O., Mehr, C. B.,y. 71B 1-192. 19-20 (1967).

Shisha, O., Mono, B.,J. 70B 3-182. 211-218 (1966).

Shoub,H., Ingberg, S. H.,BSS11.

Shouse, p. J., Passaglia, E., M260-15.

Shuler, K. E., Weiss, G. H., 9402.

Shuler, K. E., Weiss, G. H., 9527.

Shumaker, J. B. Jr., Corliss, C. H., J. 71A 6-473 . 575-583

(1967).

SiciLio, p., Dousset, M., Florin, R. E., Wall, L. A., 91 75. Siegel, S., McClelland, A., Tan, J. L., Rankin, B. K. Ill, TN296.

SiMMONS,J. A., Oser, H., Coriell, S. R., 9508.

Simmons. J. D., Bass, A. M., Tilford, S. G., Herzberg, G.,

9330.

SiMMONS.J. D., Tilford, S. G., 9403.

SiMPSON,J. A., Kuyatt, C. E., 9405.

Simpson, J. A., Menendez, M. G., Mielczarek, S. R., 9404.

SiNDT, C. P., Mann, D. B., TN343.

Skopik, D. M., Dodge, W. R., Domen, S. R., Leedy, T. P., 9299.

Smith, A. L., Mies, P. H., 9367.

Smith, G. W., Becker, D. A., 9169.

Smith, G. W., DeVoe,J. R., 9154.

Smith, J. C.,y. 7034-187, 257-264 (1966).

Smith,J. M.,7. 71B 1-196, 43-46 (1967).

Smith, L. E., Stromberg, R. R., 9509.

Smith, W. L., Hoer, C. A.J. 71C 2-249, 101-109 (1967).

Smolchowski, R.. Wilson, W. D., Dienes, G. J., Hatcher,

R. D.,M287.p. 11. Snediker, D. K., Ruegg, F. C, DeVoe, J. R., Spijkerman,

i.i.,M260-13.

SoRGER,G.U.,/V/297,p. 111. SouDERS, T. M., DziUBA, R. P., 9305.

Soutendijk, L. R. W., M284, p. 138. Sparks, D.J., Pranklin, A. D.,y. 71A 1-428, 1-2 (1967).

Spencer, L. V., Plusser, P., J. 1X34-244, 197-211 (1967).

Spijkerman, J., Herber, R. H., 9206.

Spijkerman, J. J., DeVoe,J. R., 9444.

Spijkerman,J.J., Ruegg, P. C, DeVoe,J. R., 9238.

Spijkerman, J. J., Snediker, D. K., Ruegg, F. C, DeVoe,

J. R.,M260-13.

Spinner, S., Rozner, A. G., 9511.

Spinner, S., Waxler, R. M., 9510.

Stair, R., Schneider, W. E., 9256.

Stair, R., Schneider, W. E., Pussell, W. B., 9406.

Stavroudis, O. N., 9407.

Steel, B.J., Robinson, R. A., Bates, R. G.,y. 71A 1-430, 9-12

(1967).

Stenger, F.,J. 70B 3-180. 167-186 (1966).

Stenger, F.,J. 70B 3-181, 187-210 (1966).

Stephens, R. B., Gillilland, K. E., Nefflen, K. P., Zipin,

R. B., Mielenz, K. D., 9199.

Sterling,!. T., Menis, O., M260-I4.

Stern, K. H., M292.

Stern, K. H., Weise, E. L., NSRDS-NBS7.

Stern, K. H., 9408.

Stern, R. L., M284.

Stevens, M. E., Little, J. l.. Mono. 99. Stewart.J. E., Linnig, P. J., J. 71A 1-432, 19-23 ( 1 967).

Stewart,J. W., 9248.

Stiles, P. J., Esaki, L., Schooley.J. P., 9409.

Stokes, R. H., Robinson, R. A., 9512.

Story, V. M., McIntyre, D., O'Mara, J. H., J. 71A 2-449,

169-175 (1967).

Stovall, T., Hayward, E., 9215.

Straus, S., Wall, L. A., Petters, L. J., 9218.

Strobridge, T. R., Muhlenhaupt, R. C, TN354.

Stromberg, R. R., Peyser, P.,Tutas, D.J., 9378.

Stromberg, R. R., Smith, L. P., 9509.

Sugar,J., Kaufman, V.,y. 71A 6-474, 583-585 (1967).

SuGAR,J., Reader,J., 9384.

Suzuki, G., TN414.

Swanson, H. E., McMurdie, H. P., Morris, M. C, Evans,

E. H.,Mono. 25, Section 5. Swartzendruber, L.J., Coleman,J. A., 9438.

Sweeney, W. T., Bowen, R. L., Paffenbarger, G. C, 9494.

T

Takasaki,H.,94/0.

Takasaki, H., 941 1. Takuma, H., Evenson, K. M., Shigenari, T., 9412.

Tamura, T., Marshak, H., Richardson, A. C. B., 9362.

Tan, J. L.. Rankin, B. K. Ill, Siegel, S., McClelland, A.,

TN296.

Tanimoto, O., Yasuda, Y., Okada, K., Yamamoto, T., M273.P. 86. Tantilla, W. H., Mahler, R.J.,James, L. W., 9356.

Tauber, S.J., Marron, B. A., Boltosky, G. R., 9482.

Taylor,J. K., TN403.

Taylor,J. K., TN425.

Taylor.J. K., 9167.

Taylor, T. I., Rush,J. J., Leung, P. S., 9504.

Teaney, D. T., M273, p. 50. Tech,J. L., Corliss, C. H.,J. 71A 6-472, 567-573 (1967).

Tefft, W. E.,y. 70A 4-403, 277-280 (1966).

Thaper, C. L., Rush, J. J., Plotow, H. E., Connor, D. W.,

9506.

Tharmalingam, K., M287, p. 15. Thomas, A. M., Cross,J. L., TN420.

Thomas, A. M., Cross,J. L., 9413.

Thompson, M. C. Jr., Janes, H. B., TN339.

Thorn, R. J., Winslow, G. H., M285, p. 33. Thurber, W. R., Schooley,J. P., 9397.

TiGHE, N.J., Barber, D. J., 9430.

Tilford, S. G., Herzberg, G., Simmons, J. D., Bass, A. M.,

9330.

Tilford, S. G., Simmons,J. D., 9403.

TiMMS, P. L., Ehlert, T. C, Margrave, J. L., Brinckman,

P. P., Farrar, T. C. Coyle, T. D., 9229.

Tipson, R. S., Cerezo, A. S., Deulofeu, V., Cohen, A.,

J. 71A 1-437.53-79 (1967).

Tosi, M. p., Doyama, M., M287, p. 1 7. Tosi,M.P., M287, p. 1. Toulouse, G., Priedel,J., M287, p. 141

Traub, R. D., J. 71B 2&3-197, 53-56 (1967).

Trembach, C. L., Wait, D. P., 9150.

Trotman-Dickenson, a. P., Milne, G. S., NSRDS-NBS9.

TscHiEGG, C. E., Greenspan, M., J. 71C 4-261, 299-312

(1967).

TscHUiKOW-Roux, E., McNesby,J. R., 9414.

Tschuikow-Roux, E., McNesby, J. R., Jackson, W. M.,

Paris,J. L., 9415.

123
TsuJiYAMA, B., Katsura, S., M273, p. 2 19. TuTAS, D.J., Stromberg, R. R., Peyser, P., 9378.

TuTTE, W. J., J. 71B 4-245, 213-214 (1967).

u

Uhlenbeck, G. E., M273, p. 3. Ullersma, p., Rubin, R.J., 9389.

Vm,P.,M284,p.34.

Utech, H. p., Brower, W. S., Early.J. G., 9513.

Utton, D. B.,y. 71A 2-442, 125-126 (1967).

V

Van deHouten,J. R., M29/,p. 187. VAN Reuth, E. CWaterstrat, R. M., 9517.

Van Zyl, B., Zare. R. N., Dunn, G. H., 91 71. Verdier, P. H.,9574.

Verdier, p. H., 9575.

ViETH, D. L., Michaelis, R. E., Yakowitz, H., M260-I2.

ViETH. D. L., Yakowitz, H.,y. 71C 4-262, 313-318 (1967).

VONDRACEK,J.,M297,p. 770.w

Wachtman,J. B.Jr., Farabaugh, E. N., Peiser, H. S.,J. 70A

5-410,379-384(1966).

Wachtman,J. B.Jr., Franklin, A. D., Marzullo, S.,J. 71

5-465,355-362 (1967).

Wachtman,J. B.Jr., Wheat, M. L., Anderson, H.J., Bates,

J. L.,977i.

Wade, C. W. R., Isbell, H. S.,y. 71A 2-445, 137-148 (1967).

Wainwright, a., Barnes,J. A., 9752.

Wait, D. F., J. 71C 2-252, 127-152 (1967).

Wait, D. F., Trembach, C. L., 9750.

Walker, A., Rush,J. J., Ferraro,J. R., 9505.

Walker.J. a., Dibeler, V. H., 9194.

Walker, J. A., Liston, S. K., Dibeler, V. H., J. 71A 5-467,

371-378(1967).

Walker, J. A., Rosenstock, H. M., Dibeler, V. H., J. 70A

6-477, 459-463 (1966).

Walker, J. A., Rosenstock, H. M., Botter, R., Dibeler,

V. \\.,9281.

Wall, L. A., Antonucci, J. M., J. 70A 6-420, 473-480 (1966).

Wall, L. A., AntonucclJ. M., J. 71A 1-434, 33-41 (1967).

Wall, L. A., Fetters, L. J., Straus, S., 9218.

Wall, L. A., Fetters, L. J., 9254.

Wall, L. A., Flynn,J. H., J. 70A 6-422, 487-523 (1966).

Wall, L. A., Flynn,J. H., 9792.

Wall, L. A., Flynn,J. H., 9457.

Wall, L. A., Lowry, R. E., Brown, D. W., 9257.

Wall, L. A., Morrow, W. L., Flynn, J. H., J. 71A 7-45i,

25-i7 f7967j.

Wall, L. A., Sicilio, F., Dousset, M., Florin, R. E., 9775.

Wall, L. A., Yu, H., 9264.

Wallace, B. M., Brown, W. E., 9272.

Wallace, L. R., M291,p. 155. Ward,J. F., Kaufman, V., 9338.

Ward,J. F., Kaufman, V., 9339.

Waring,J. L., Roth, R. S.,y. 70A 4-404, 281-303 (1966).

Warner, B., Corliss, C. H.,y. 70A 4-409, 325-371 (1966).

Waterstrat, R. M., Eden, G. T., 9448.

Waterstrat, R. M., van Reuth, E. C, 957 7. Watson, S. H., M284, p. 58. Watson, T. W., Flynn, D. R., Robinson, H. E., J. 71C 4-259.

285-291 (1967).

Watstein, D., 9760.

Waxler, R. M., Kruger,J., Yolken, H. T., 9522.

Waxler, R. M., Spinner, S., 9570.

Weber, H. J., Danos, M., Greiner, W., Huber, M. G., 9274.

Weber, L. A., Goodwin, R. D., Roder, H. M., 9246.

Wehrung,J. M., Logan, H. L., 9475.

Weise, E. L., Stern, K. H., NSRDS-NBS7.

Weiss, A. W.,y. 71A 2-447, 157-162 (1967).

Weiss, A. W.,y. 71A 2-448, 163-168 (1967).

Weiss, G. H., Billick, I. H., Schultz, M.,y. 71A 7-457. 75-77

r7967j.

Weiss, G. H., Shuler, K. E., 9402.

Weiss, G. H., Shuler, K. E., 9527.

Welge, K. H., McNesby,J. R., Braun, W., 9286.

Welge, K. H.,9476.

Welge, K.H., 9477.

Welge, K. H.,947S.

Wells,J. S., Winder, D. R., 9479.

Wets, R.J.-B., Witzgall, C.,y. 71B 1-189, 1-7 (1967).

Wheat, M. L., Anderson, H. J., Bates, J. L., Wachtman,

J. B.Jr., 97 75. White, C. E.,M291.p. 127. White, D., Mann, D. E., Acquista, N., 9359.

Wiese, W. L., 9795.

Wilcox, R. M., 9420.

Willard, W. a., Jenkins, W. D., J. 70C 5-257, 195-205

(1966).

Williams, G., Passaglia, E., Hoffman, J. D., 9462.

Williams, H. M., Gadsden, M., J. 70C 3-226, 159-163 (1966).

Williams, M. L., Cuthill,J. R., McAlister, A.J., 9442.

Williamson, R. C, Chase, C. E., M273, p. 197. Wilson, W. D., Dienes, G. J., Hatcher, R. D., Smolchowski,

R.,M287,p. 11. Wims, a. M., MAZUR,J.,y. 70A 6-479, 467-471 (1966).

Winder, D. R., Wells,J. S., 9479.

WiNOGRADOFF, N. N., Kessler, H., 9468.

Winogradoff, N. N., Kessler, H. K., 9518.

WiNOGRADOFF, N. N., 9579.

WiNSLOW, G. H., Thorn, R. J., M287, p. 33. Witzgall, C, Mesztenyi, C.,y. 71B 7-797, 11-17(1967).

Witzgall, C, Wets, R.J.-B.,y. 71B 1-189, 1-7 (1967).

Wolcott, N. M., Hirschkoff, E. C, 9279.

Wolf, W. ?.,M273,p.49.

Wood, L. A., Bekkedahl, N., 9520.

Wood, M. K., Glaser, E., Rosenblatt, D., 9247.

Wood, R. F., Gilbert, R. L., M287, p. 157. Wood, R.F.,Opik,U., M2«7, p. 779. WooLLEY, R. M., Davis, L. J., Kirstein, A. P., Pell, W. H., y . 70C 4-254 , 22 7-244 r 7 966 j

Woolley, R. M., Kirstein, A. F.,y. 71C 7-45S, 7-70 f7967j.

Woolridge,J., M291,p. 107. Wynn, a. H. a., M284, p. 44.

Y

Yakowitz, H., Vieth, D. L.,y. 71C 4-262, 313-318 (1967).

Yakowitz, H., Vieth, D. L., Michaelis, R. E., M260-12.

Yakowitz, H., 9527.

124
Yamamoto, T., Tanimoto, O., Yasuda, Y., Okada, K., M273.P. 86. Yasuda, Y., Okada, K., Yamamoto, T., Tanimoto, O.,

M273.P. 86. Yates.J. T.Jr., Madey, T. E., 9421.

YoDH, G. B., CoYNE,J.J., Meshkov, S., 9295.

YoLKEN, H. T., Waxler, R. M., Kruger,J., 9522.

YouNcJ. M., Maeda, K., 9186.

YouNcJ. P.,9422.

Young, R. D., Clark, H. E., 9423.

Young, R. D., Clark, H. E., 9424.

YouNGLOVE, B. A., 9239.

Yu,H.,NoH, K.,94«9.

Yu,H., Wall, L. A., 9264.

YuROW,J. A., 9523.

z

Zapas, L. J., J. 70A 6-423. 525-532 (1966).

Zare, R. N., Dunn, G. H., Van Zyl, B., 977/.

Zimmerer, R. W., 9244.

125
I

J
6.3. KEY WORD INDEX

A

a-aluminum dodecaboride ; Aluminum fluoride; Bomb calorimeter; Boron trifluoride; Fluorine; Heat of combustion; Heat of

formation; Teflon; Aluminum diboride; J. l\X4-462, 307-315

(1967).

Ab initio electronic calculation; Dipole moment; Dissociation

energy; Electron affinity; Energy; Field gradient; Magnetic

constants; Molecular electronic structure; Orbital energy;

Polarizability; Quadrupole moment; Spectroscopic constants; TN438.

Abrasion resistance; Chemical resistance; Porcelain enamel;

Sanitary ware; Sheet steel; PS5-66.

Abrasion resistance testing; Automatic document distribution; Flexible tubing pump; Inverting amplifiers; Laser beam phase

shift; Laser heterodyning; Liquid metering pump; Optical

refractive index; Programmed document distribution; Relaxation oscillator; TN437.

Abrasive grain; Accumulation curve; Coated abrasive products;

Grain, abrasive; Micron; Overgrade; Sedimentation; Sieve;

Standard sieve; PS8-67.

Absolute ampere determination; Calculable inductor; Current

balance; National electrical units; Nonmagnetic facility; Pellat dynamometer; Proton precession frequency; 9325.

Absolute gamma ray source strength; Black glass beads; Thermal neutron flux; 9435.

Absolute ratios; Atomic weight; Isotopic abundances; Magnesi- um; 7. 70A 6-416, 453-458 (1966).

Absorbed dose; Calorimeter; Cavity ionization chamber;

Cobalt-60 gamma rays; Comparison; Graphite; lV-s,„', J. 71C

1-440, 19-27(1967).

Absorptance; Contrast; Modulation; Notation; Optical density;

Propagance; Reflectance; Reflectance factor; Symbols;

Transmittance; Transmittance factor; 9373.

Absorption, ionospheric; Ionospheric absorption; Stratospheric

warnings; Winter anomaly; 9267.

Absorption, water; Adsorption, water vapor; Leather; Permeation; Water vapor permeability; 9465.

Absorption; Atomic; Data compilation; Emission; Energy

levels; X-ray wavelength; NSRDS-NBS14.

Absorption; Carbon monoxide; Forbidden transition; High

resolution; Spectrum; Vacuum ultraviolet; 9330.

Absorption; Collective model; Cross section; Deformed nuclei; Giant quadrupole resonances; Photons; 9352.

Absorption; Radiation; Spectroscopy; Ultraviolet; X-rays;

9311.

Absorption spectra; Acyclic sugars; 1-acylamido sugars; Al- dofuranoid sugars; Aldopyranoid sugars; Infrared spectra; J. 71X1-437, 53-79(1967).

Absorption spectra; Infrared spectra; Mono-, bis-, and

tris-(phenylhydrazones); Phenylazo compounds; J. 71A 4-459,

277-285 (1967).

Absorption spectroscopy; Alkali metal hydrides; Hydrides;

Isotope relations; Molecular constants; 9276.

Absorption spectroscopy; Alkali metal hydrides; Hydrides;

Isotope relations; Molecular constants; 9277.

Absorption spectroscopy; Alkali metal hydrides; Hydrides;

Isotope relations; Molecular constants; 9278.

Absorption spectrum; CO; Diatomic spectrum; Electronic

transition; Rotational analysis; Vacuum-ultraviolet region;

9403.

Abstraction; Isobutane-d9; Ketene; Methylene; Photolysis;

9322.

Abstracts; Editing; Journals; Publishing; Redacting; 9280.

Accelerated tests; Bathtubs; External wall units; Innovation;

Long-time behavior; Performance standards; 9452.

Accelerators; Far infrared; Natural rubber; Sulfur; Tetramethylthiuram disulfide; Vulcanization; Zinc dibutyldithiocarbamate; Zinc dimethyldithiocarbamate; J. 71A 1-432,

19-23(1967).

Accelerometer; Calibration; Comparison calibration; Frequency

range; Shaker; Vibration; 9306.

Accumulation curve; Coated abrasive products; Grain, abrasive; Micron; Overgrade; Sedimentation; Sieve; Standard

sieve; Abrasive grain; PS8-67.

Accuracy; Calibration; Commodity transfer; Cryogenic;

Cryogenic processes; Density; Flowmeters; Mass flow; Mass

flowmeters; Performance results; Propellant management;

Substitute fluid; Volume flow; 9428.

Accuracy; Calibrations; Conferences, 1966 Standards Laboratory; Foreign standards laboratories; Laboratory management; Measurements and standards; Measurement system;

National Conference of Standards Laboratories; M291.

Accuracy; Mass measurement; Measurement; Measurement

process; Precision; Statistical control; Uncertainty; Mono.

103. Acetic acid; Acidity in deuterium oxide; Deuterium oxide; Dis- sociation constant; Heavy water; PD scale; 9170.

Acetic acid-c/a; Acid-base; Deuterium oxide; Dissociation constants; Emf; Ionization; Isotope effects; Thermodynamics;

Weak electrolytes; 9492.

Acetylene; CH; Chemiluminescence; Cross section; Emission

spectrum; Energy transfer; Experimental; Gas; Oxygen atom;

Oxidation; Population distribution; Rotation; 9288.

Acetylene; Combination; Ethane; Ethylene; Flash photolysis;

Gas phase; Hydrogen; Hydrogen deuteride; Insertion; Methane; Methyne; Rate; Vacuum ultraviolet; 9286.

Acid-base; Deuterium oxide; Dissociation constants; Emf;

Ionization; Isotope effects; Thermodynamics; Weak elec- trolytes; Acetic acid-d/4; 9492.

Acid-base catalysis in D2O; Deuterium isotope effects; D-fructose; D-glucose; Isotope effects; Mechanism of mutarotation;

Mutarotation; Pyranose-furanose interconversions; Sugars in solution;^. 71A 2-445, 137-148 (1967).

Acid-base equilibria; Aminopyridine; Dissociation constant;

Electrolytic dissociation; Methanol-water solvents; Thermodynamics; 9493.

Acidity; Analysis; Conductance measurements; Electrochemical analysis; Electrochemistry of solutions; Glass electrodes; Medium effects; PH measurements; TN423.

Acidity; Analytical chemistry; Conductance; Deuterium oxide;

Dissociation processes; Electrochemistry; Electrolytes; Emf;

Indicators; Isopiestic; Vapor pressure; Methanol-water sol- vents; Thermodynamics; TN400.

Acidity in deuterium oxide; Deuterium oxide; Dissociation constant; Heavy water; PD scale; Acetic acid; 91 70. Acoustical thermometry; Isotherms below 20 °K; Low temperature thermometry; Primary thermometry; Speed of sound; Ul- trasonic interferometer; 9379.

Acoustic cavitation; Alpha-particle-induced cavitation; Cavitation; Cavitation nucleus; Cavitation threshold; Fission-in- duced cavitation; Neutron-induced cavitation; Radiation-induced cavitation; Threshold; J. 71C 4-261, 299-312 (1967).

Acoustics; Diffraction, potential; Piston radiator; Potential dif- fraction; Radiator, piston; Sound; 9319.

127
Activated complex; Activated molecules; Activated state; Decay; Dissociation; High pressure rate constant; Kinetics;

Lifetime; Mass spectra; Metastable molecules; Predissociation; Quantum mechanics; Resonance scattering; Theoretical;

9366.

Activated molecules; Activated state; Decay; Dissociation;

High pressure rate constant; Kinetics; Lifetime; Mass spectra;

Metastable molecules; Predissociation; Quantum mechanics;

Resonance scattering; Theoretical; Unimolecular dissociation; 9366.

Activated state; Decay; Dissociation; High pressure rate constant; Kinetics; Lifetime; Mass spectra; Metastable

molecules; Predissociation; Quantum mechanics; Resonance

scattering; Theoretical; Unimolecular dissociation; Activated

complex; 9366.

Activation analysis; Biological; Botanical samples; Carbon in sodium; Cockroft-Walton generator; Digital computers;

Flux monitors; High precision 14 MeV neutron activation; Homogeneity testing; Instrumentation; NBS Linac; NBS

reactor; Photoneutron reactions; Self absorption corrections;

Standard reference materials; Vanadium in irons and steels; TN428.

Activation analysis; Standard reference materials; Photo-neutron reactions; Flux monitors; Cu, Se, Al. V in irons

and steels; Homogeneity testing; Pneumatic rabbit sensor; Mossbauer spectroscopy; Tin standard for chemical shift; TN404.

Activation curve; Cross-section; Photoneutron; 9215.

Activation energies; Arrhenius equation; Bimolecular; Chemical

kinetics; Data; Gas; Rate constants; Reactions; Tables;

NSRDS-NBS9.

Activation-energy; Atom-transfer reaction; Carbon dioxide;

Carbon monoxide; Gas phase; Hydrogen atom;

Hydroxyl-radical; Rate constant; 9328.

Activation enthalpy: Hexafluoropropylene; High pressure; In- trinsic viscosity; Radiation induced polymerization; Radiation

intensity; 9257.

Activity coefficients; Isopiestic measurements; Vapor pressure;

Calcium chloride; Mixed solutions; J. 70A 4-405. 305-311 (1966).

Acyclic sugars; 1-acylamido sugars; Aldofuranoid sugars; Al- dopyranoid sugars; Infrared spectra; Absorption spectra; J. 71A 1-437.53-79(1967).

Adaptability; Amalgams; Dental amalgam; Dentistry;

Mercury-silver alloys; Packing pressure; Particle size; Silver-tin alloys; Spherical alloy; Spherical-alloy amalgam;

9448.

Adhesion; Bonding; Dental; Filling materials; Hardening;

Shrinkage; Strain; Stress; Tensile; 9433.

Adhesive industrial; Characteristics; Conductive; Flooring; Installation; Standards; 9177.

Adhesives; Boil test; Bonding; Exterior; Grading; Interior; Moisture content; Overlay; Plywood; Shear test; Vacuum and

pressure test; PS 1-66. Adiabatic compressibility; Hydrogen; Sonic velocity; 9239.

Administration; Hospital data communications; Laboratory;

Nursing station; Pharmacy; Real-time hospital information

system; Remote data input; 9500.

Adsorption, water vapor; Leather; Permeation; Water vapor

permeability; Absorption, water; 9465.

Adsorption; Barium fluoride; Electric hygrometer; Humidity;

Thin films; Vacuum; y.71C 3-255. 199-207 (1967).

Adsorption; Chain polymer; Critical energy; Generating function; Lattice model; Partition function; Random walk; J. 70B

4-185,237-247 (1966).

Adsorption; Chemisorption; Desorption; Dissociation; Field

emission microscopy; Kinetic; Nitric oxide; Surface; Surface

diffusion; Tungsten; Work function; 9421

Adsorption kinetics; Nitrogen; Rhenium; Sticking coefficient; Surface coverage; 9394.

Aerosol; Air mass; Ozone; Solar radiation; Spectral distribution; Water vapor concentration; Wavelength; Wavenumber; 9525.

Ag; Cu; Double electron photoexcitation; Ni; Photoemission;

Soft X-ray spectrum; 9442.

Aging; Calibration (USES); Frequency standards; Gas cells; Performance (long term); Reliability; Rubidium; Stability;

TN341.

Air bearing; Ceramic moving element; Electrodynamic shaker;

Piezoelectric accelerometers; Reciprocity; Secondary stan- dard; Vibration standard; 9297

Air collector; Air condensation; Air sampling; Air solidification

at 20 °K; Cryodeposit; Cryodeposit surface temperature;

Cryopumping; Cryopumping air at 20 °K in the transition pres- sure regime; Geysering; 9463.

Air condensation; Air sampling; Air solidification at 20 °K;

Cryodeposit; Cryodeposit surface temperature; Cryopumping; Cryopumping air at 20 °K in the transition pressure

regime; Geysering; Heat transfer to air condensing at 20 °K;

9463.

Air density; Balance; Balance calibration; Balance equilibrium;

Balance sensitivity; Density; Double substitution weighing;

Hydrostatic balance; Hydrostatic weighing; Silicon density;

Substitution balance; J. 71C 3-254, 1 79-198 (1967).

Airglow photometry; Fabry-Perot interferometer; J. 70C 3-226,

159-163 (1966).

Air mass; Ozone; Solar radiation; Spectral distribution; Water

vapor concentration; Wavelength; Wavenumber; Aerosol;

9525.

Air pollution studies; Characterization of chemical structures; Disaccharide of d-lyxofuranose; Infrared absorption methods

for analysis of carbohydrates; Naturally occurring

monosaccharides and 6-deoxy sugars; Oxidation of polycyclic

aromatic hydrocarbons; TN427.

Air-pollution studies; Oxidation of polycyclic aromatic

hydrocarbons; Sugars in solution; Conformational analysis;

Carbon- 14- and tritium-labeled carbohydrates; Large-scale

paper chromatography; Phenylhydrazono-phenylazo tau- tomerism; TN405.

Air sampling; Air solidification at 20 °K; Cryodeposit;

Cryodeposit surface temperature; Cryopumping; Cryopumping air at 20 °K in the transition pressure regime; Geysering;

Heat transfer to air condensing at 20 °K; Air collector; 9463.

Air-scatter; Angular distribution; Energy spectrum; Gamma

rays; Neutrons; Point source; Shielding; Single scatter; 9308.

Air solidification at 20 °K; Cryodeposit; Cryodeposit surface temperature; Cryopumping; Cryopumping air at 20 °K in the

transition pressure regime; Geysering; Heat transfer to air condensing at 20 °K; Air collector; Air condensation; 9463.

Aldehyde; Energy transfer; Photolysis; Triplet state; Vapor

phase; 9385.

Aldofuranoid sugars; Aldopyranoid sugars; Infrared spectra;

Absorption spectra; Acyclic sugars; 1-acylamido sugars; J. 71A 1-437. 53-79 (1967).

Aldopyranoid sugars; Infrared spectra; Absorption spectra;

Acyclic sugars; 1-acylamido sugars; Aldofuranoid sugars; J. 11X1-437, 53-79(1967).

Alfven; Dispersion; Hydromagnetic; Magnetosphere; Multicomponent; Pc 1 micropulsations; Plasma; Polarization;

Propagation; TN342.

Algorithm; Cone; Convex hull; Face; Frame; Lineality space;

Linear programming; J. 718 1-189, 1-7 (1967).

Algorithm; Matrix; Block; Rank; 7. 70B 3-183, 219-220 (1966).

Algorithms; Arborescences; Branchings; Combinatorics;

Graphs; Linear programming; Traveling salesman; Trees; J

71B 4-249. 233-240(1967).

Algorithms; Combinatorics; Indeterminates; Linear algebra;

Matroids; Systems of distinct representaUves; Term rank; J. 71B 4-250. 241-245 (1967).

Algorithms; Combinatorics; Mathematics; Matroids; Networks;

Operations research; Optimization; 9314.

128
AlH; AlO; Atomic spectra; Electrical discharges; Exploding

wires; Light sources; Time-resolved spectroscopy; Titanium;

TiO; Aluminum; 9292.

Alkali halide crystal; Born- Mayer potential; Deformation dipole

model; Effective force constants; Isotopic impurities; Local

mode frequencies; Nearest-neighbor interaction; Substitutional impurity; L)-centers; 9354.

Alkali halides; Aqueous; Chloride; Color centers; Conductivity;

Crystal growth; Sodium; 9182.

Alkali halides; Heats of solution; Ion substitution; Lattice relaxation; Polarization energy; Shell calculations; Solid solutions; 9300.

Alkali metal hydrides; Hydrides; Isotope relations; Molecular

constants; Absorption spectroscopy; 9276.

Alkali metal hydrides; Hydrides; Isotope relations; Molecular

constants; Absorption spectroscopy; 9277

Alkali metal hydrides; Hydrides; Isotope relations; Molecular

constants; Absorption spectroscopy; 9278.

Alloy phases; Atomic ordering; A15-type phases; Chromium al- loys; Electron compounds; Intermediate phases; Nonstoichiometric phases; Osmium alloys; Platinum alloys;

Transition elements; 9517.

-Alloys, high-temperature; Ambient air; Argon; Atmospheres of

argon; High-temperature alloys; Nitrogen; Nitrogen and ambient air; Spark excitation; 9235.

Allyl- and propenylbenzoic acids; Change of pK with dielectric constant; Hammett sigma constants; Ionization constants; pK

values in ethanol-water; Sigma constants in ethanol-water;

Substituted benzoic acids; 7. 71A 5-468, 379-384 (1967). AlO; Atomic spectra; Electrical discharges; Exploding wires;

Light sources; Time-resolved spectroscopy; Titanium; TiO;

Aluminum; AlH; 9292.

Alphanumeric characters; Displays; Handbook; Human factors;

Legibility; Psychology; Readability; Standards; Symbols;

Type faces; Typography; Visibility; M262-2.

Alphanumeric compression; Information handling; High-speed

information transmission; Information storage and retrieval; Numeric compression; Systems analysis; TN4I3.

Alpha-particle-induced cavitation; Cavitation; Cavitation

nucleus; Cavitation threshold; Fission-induced cavitation; Neutron-induced cavitation; Radiation-induced cavitation; Threshold; Acoustic cavitation;^. 71C 4-261, 299-312 (1967).

Alternating-current; Calibration; Direct-current; High-voltage;

Ratio; Safety; Standards enclosure; Transformer; Voltage-divider; Voltmeter; TN349.

Alumina; Ceramic oxides; Emittance; Error sources; Magnesia;

Measurement uncertainties; Spectral emittance; Thermal

radiation; Thoria; Zirconia;^. 70A 5-41 2, 393-415 (1966).

Aluminium oxide; Dislocations; Electron microscopy; Grain

boundaries; Impurities; Sapphire; 9430.

Aluminum; AlH; AlO; Atomic spectra; Electrical discharges;

Exploding wires; Light sources; Time-resolved spectroscopy;

Titanium; TiO; 9292.

Aluminum; Beryllium; Thermoanalytical standards; Tricalcium

silicate; Spectrophotometry; Antimony; High precision deter- mination of nickel; Simultaneous determination copper;

Cobalt; "releasing agents'" in flame emission and atomic ab- sorption; Magnesium; TN402.

Aluminum; Cryogenic magnet; Energy storage; Induction coil; Liquid hydrogen; 9429.

Aluminum borides; Boron; Boron carbide; Carbon; Fluorine;

Heat of combustion; Polytetrafluoroethylene (Teflon);

Refractory compounds; 9270.

Aluminum conduit; Calcium chloride; Concrete; Corrosion in concrete; Corrosion in plaster; Dissimilar metals; Galvanic

corrosion; Gypsum plaster; 9497.

Aluminum diboride; a-aluminum dodecaboride; Aluminum

fluoride; Bomb calorimeter; Boron trifluoride; Fluorine; Heat

of combustion; Heat of formation; Teflon; J. 71A 4-462,

307-315(1967).

Aluminum fluoride; Bomb calorimeter; Boron trifluoride; Fluorine; Heat of combustion; Heat of formation; Teflon;

Aluminum diboride; a-aluminum dodecaboride; J. 71A 4-462,

307-315 (1967).

Aluminum fluoride; Carbon tetrafluoride; Fluorine; Fluorine

bomb calorimetry ; Graphite: Heat of combustion; Heat of for- mation; Hydrogen fluoride aqueous; Teflon; J. 71A 2-440,

105-118(1967).

Aluminum oxide; Corundum; Elastic constants; Shear modulus;

Young's modulus; 7. 70A 4-403, 277-280(1966).

Aluminum-silicone compound; GaAs lasers; Heat sink; Optical

power; 9467.

Aluminum trifluoride; Drop calorimetry, enthalpy measurements; High-temperature calorimetry; Phase transition; Pretransition phenomena; Specific heat; Thermodynamic properties; J. 71A 3-450, 185-193 (1967).

AI2O3; Dissociation; Environmental effects; Melting point; Pre- melting;7. 71A 4-463, 317-333 ( 1967). Amalgam; Dental; Research; 9495.

Amalgams; Dental amalgam; Dentistry; Mercury-silver alloys;

Packing pressure; Particle size; Silver-tin alloys; Spherical al- loy; Spherical-alloy amalgam; Adaptability; 9448.

Ambient air; Argon; Atmospheres of argon; High-temperature

alloys; Nitrogen; Nitrogen and ambient air; Spark excitation; Alloys, high-temperature; 9235.

Aminopyridine; Dissociation constant; Electrolytic dissociation; Methanol-water solvents; Thermodynamics; Acid-base

equilibria; 9493.

Analog computer; Bibliography; Computer; Electrodeposition;

Electron back scatter; Electron probe microanalyzer; Emission spectroscopy; Laser probe; Mass spectroscopy; Photographic photometry; Plasma jet; Preconcentration; Pulse

height analyzer; TN401.

Analysis; Arc temperature; Atomic absorption spectrometry;

Analog computer; Bibliography; Computer; Electrodeposition; Electron back scatter; Electron probe microanalyzer;

Emission spectroscopy; Laser probe; Mass spectroscopy;

Photographic photometry; TN401

Analysis; Catalog; Certificate; Characterization; Composition;

Price list; Property of material; Purity of material; Standard

reference materials; Standards; M260, 1967 Edition.

Analysis; Colorimetric; Dithizone; Paint film; Fungicide; Latex; Mercury; Paint; 9431

Analysis; Conductance measurements; Electrochemical analysis; Electrochemistry of solutions; Glass electrodes; Medium

effects; PH measurements; Acidity; TN423.

Analysis; Integration; Mathematics; Monte-Carlo; Multiple in- tegration; Numerical analysis; Numerical integration; Quadrature; 9321.

Analysis of Yb 11; Atomic energy levels of Yb 11; Classified line of Yb 11; Spectrum, Yb 11; Ytterbium, second spectrum;

Zeeman effect in Yb 11; 7. 71 A 6-470, 396-545 (1967).

Analytical chemistry; Conductance; Deuterium oxide; Dissociation processes; Electrochemistry; Electrolytes; Emf; Indicators; Isopiestic; Vapor pressure; Methanol-water solvents; Thermodynamics; Acidity; TN400.

Analytical emission; Atomic absorption; Electrical discharge;

Bibliography; Indexed; Flame; Spectroscopy; M281.

Analytic functions; Complex analysis; Dirichlet problem; Discrete analytic functions; 7. 71B 2&3-205. 105-1 10 ( 1967).

Analyzer; Cryogenics; Hydrogen; Instrument; Instrumentation;

Liquefier; Liquid hydrogen; Measurement; Nuclear spin

relaxation time; Ortho-para; Relaxation time; Ti; 9486.

Angular dependence; Hexadecapole; Hexadecapole transitions; Phonon interactions; Saturation factor; 4-3m symmetry; 9357.

Angular difference; He, He ; Inelastic scattering; Resonances;

Scattering; 9404.

Angular distribution; Energy spectrum; Gamma rays; Neutrons;

Point source; Shielding; Single scatter; Air-scatter; 9308.

129
Animal glue; Glucose; Glycerol; Mannitol; Melamine resin; Paper; Sucrose; 9455.

Anisotropic crystal; Gruneisen's constant; Interferometer; Rutile; Thermal expansion; J. 71A 5-466. 363-369 (1967).

Annealed glass; Crystal; Diethyl phthalate; Glass transformation; Heat capacity calorimetry; Molecular configurational

state; Normal and supercooled liquid; Quenched glass;

Residual (configurational) entropy; J. 71A 4-461. 293-305

(1967).

Annealed specimens; Cold-worked specimens; Elastic moduli;

Internal friction; Nickel-titanium alloy; Temperature dependence; 9577.

Annealing; Borosilicate crown glass; Glass; Index of refraction; Relaxation times; Two-relaxation time model; Volume relaxa- tion;y. 71A 3-456. 231-238(1967).

Annealing; Case hardening; Chemical composition; Hardening;

Heat treatment; Ni-maraging steels; Normalizing; Stainless

steels; Structural steels; Surface hardening; Tempering; Tool

steels; Mono. 88. Annealing; Chain fold; Chain rotation; Chain twisting; Defect;

Dielectric relaxation; Mechanical relaxation; Polychlorotrifluoroethylene; Polyethylene; Polymer;

Semicrystalline; Vacancy; 9462.

Annealing; Density; Glass; Hydrostatic compression; Polarizability; Refractive index; 9570.

Annihilation radiation; Compton wavelength of the electron; Positronium; Quenching; J. 71A 5-464, 347-353 (1967).

Anniversaries; History; Probability; Statistics; Pierre de Fer- mat; Gregor Mendel; Isaac Todhunter; 9756.

Anniversaries; Statisticians, 1966, 1967; 9307.

Annual report; Technical highlights; M283.

Annual report; Technical highlights; M293.

Anodic oxidation; Ellipsometry; Iron; Iron oxide films; Kinetics; Passivity; Potentiostat; 9469.

Antennas; Calibration; Comparison; Effective aperture; Elec- tromagnetic horns; Gain; Measurement; Microwave;

Mismatch errors; Rayleigh distance; Standard gain horns;

7"A'i57. Antiferromagnetic; Cold-work; Fe-Ni-Cr alloys; Neel temperature; Shear modulus; Stainless steel; J. 70C 3-232. 207-210

(1966).

Antiferromagnetic; EPR; G value; K-band spectrometer; NiBr2;

Single crystal; 9419.

Antimony; High precision determination of nickel; Simultaneous

determination copper; Cobalt; "releasing agents" in flame

emission and atomic absorption; Magnesium; Ferrous SRMs;

Stoichiometric mixtures uranium oxide; Isotope ratio deter- mination; TN402.

Apartment dwelling; Burnout test; Fire load; Fire performance;

Flame penetration; Potential heat; Structural load; BSSIO.

Apparatus; Isothermally crystallized sample; Loss compliance;

Loss modulus; Mechanical relaxation; Polychlorotrifluoroethylene; Quenched sample; Storage

modulus; Tan 5; Torsion pendulum; Varying crystallinities;

9441.

Apparatus description; Flash photolysis; Vacuum ultraviolet; 9287.

Approximation; Error; Formula; Imprecision; Law of error; Products; Propagation of error; Random; Ratio; Systematic;

Sum;y. 70C 4-237. 263-273 (1966).

Approximations; Convergence; Multidimensional; Polynomials;

Functions; Variables; Hermite-Fejer; Bernstein; Chebyshev;

J. 70B 3-182.211-218(1966).

Aqueous; Chloride; Color centers; Conductivity; Crystal

growth; Sodium; Alkali halides; 9182.

Aqueous solution; Cross-linking; Dextran; Dextran triacetate; Gamma irradiation; Polymer degradation; Postirradiative

decay; J. 71A 1-433. 25-31 (1967).

Arborescences; Branchings; Combinatorics; Graphs; Linear

programming; Traveling salesman; Trees; Algorithms; J. 71B

4-249. 233-240(1967).

Arc; Blackbody; Graphite; Spectral radiance; Spectroradiometer; Temperature; 9326. Arc; Boltzmann equilibrium; Excitation; Ionization; Line intensity; Saha equilibrium; Spark; Spectrochemical analysis;

Spectroscopic source; 9361.

Arc resistance; Tracking; Measurements; Electrical testing;

Conductance; Dielectric conductance; Conductivity; Volume

conductivity; Insulation conductance; Resistance; Dielectric

resistance; Resistivity; Dielectric constant; Permittivity;

9774.

Arc temperature; Atomic absorption spectrometry; Analog computer; Bibliography; Computer; Electrodeposition; Electron

back scatter; Electron probe microanalyzer; Emission spec- troscopy; Laser probe; Mass spectroscopy; Photographic

photometry; Plasma jet; TN401

Argon; Atmospheres of argon; High-temperature alloys;

Nitrogen; Nitrogen and ambient air; Spark excitation; Alloys,

high-temperature; Ambient air; 9235.

Argon; Atomic spectra; Transition probabilities; J. 71A 6-473,

575-583(1967).

Argon; Molecular complexity; Molecular thermodynamics;

Prigogine's cell theory; Thermodynamic properties;

Three-parameter theorem; 9386.

Armco iron; Conductivity; Electrical conductivity; Electrical re- sistivity; Heat conductivity; Heat transfer; Iron; Lorenz function; Resistivity; Thermal conductivity ; 7. 71C 4-259. 285-291

(1967).

Arrhenius equation; Bimolecular; Chemical kinetics; Data; Gas;

Rate constants; Reactions; Tables; Activation energies;

NSRDS-NBS9.

Ash content; Elemental analysis; Homogeneity; Lithium content; Molecular weights; Polymer; Preparation; Purity;

Sampling; Standard sample; Volatile content; J. 71A 1-435. 43-47(1967).

Astigmatism; Czerny-Turner; Spectrograph; Spectrometer;

9407.

Asymptotic solutions; Eigenvalues; Error term; Matrices; Norm

bounds; Vector bounds; Volterra vector integral equations; J. 70B 3-180. 167-186(1966).

Asymptotic solutions; Error bounds; Integral equations;

Matrices;^. 70B 3-181, 187-210(1966).

Atmospheres of argon; High-temperature alloys; Nitrogen;

Nitrogen and ambient air; Spark excitation; Alloys, high-temperature; Ambient air; Argon; 9235.

Atmospheric; Distance measurements; Earth-to-space

microwave transmissions; Microwave transmissions; Phase;

Tracking; TN339.

Atmospheric corrosion tests; Chemical attack; Cold working;

Corrosion; Cracking; Stainless steels; Steels; Stress corrosion; 9479.

Atmospheric research; Electromagnetic; Telecommunication;

United States; 9158.

Atmospheric resonances; Auroral infrasound; Infrasonic waves; Thermal structure; 97^6.

Atom; Molecule; Electron; Collision cross section; M289.

Atomic; Collisions; Continuous; Deexcitation; He; He2;

Metastable; Radiative; Spectra; Theory; Vacuum-ultraviolet;

9367.

Atomic; Data compilation; Emission; Energy levels; X-ray

wavelength; Absorption; NSRDS-NBS14.

Atomic absorption; Electrical discharge; Bibliography; Indexed;

Flame; Spectroscopy; Analytical emission; M281 . Atomic absorption spectrometry; Analog computer; Bibliography; Computer; Electrodeposition; Electron back scatter; Electron probe microanalyzer; Emission spectroscopy; Laser

probe; Mass spectroscopy; Photographic photometry; Plasma

jet; Preconcentration; TN401

130
Atomic absorption spectrometry; Atomic emission spec- trometry: Atomic fluorescence spectrometry; Flame

photometry; Spectroscopy; 9481

Atomic beam; Frequency shift; Radiation field; Resonance;

Thallium; TN346.

Atomic calculations; Nonlinear optical phenomenon;

Two-photon ionization; 9323.

Atomic emission spectrometry; Atomic fluorescence spec- trometry; Flame photometry; Spectroscopy; Atomic absorption spectrometry; 9481.

Atomic energy levels; Atomic spectra Si i; First spectrum; Multiplet table; Silicon; Spectrum, Si i; Wavelengths. Si i; NSRDS-NBS3. Section 2. Atomic energy levels; Isoelectronic sequence; Praseodymium;

Rare earth; Sliding spark discharge lamp; Spectrum; J. 71A

6-474,583-585 (1967).

Atomic energy levels of Yb ii; Classified line of Yb ii; Spectrum,

Yb ii; Ytterbium, second spectrum; Zeeman effect in Yb ii; Analysis of Yb \i\J. l\X6-470. 396-545 (1967).

Atomic fluorescence spectrometry; Flame photometry; Spectroscopy; Atomic absorption spectrometry; Atomic emission

spectrometry; 9481.

Atomic frequency standards; Atomic time; Cesium atomic

beam; Frequency and time standards; Standards; Standard

time scales; 9387.

Atomic ordering: A15-type phases; Chromium alloys; Electron

compounds: Intermediate phases; Nonstoichiometric phases;

Osmium alloys; Platinum alloys; Transition elements; Alloy

phases; 957 7. Atomic spectra; Electrical discharges; Exploding wires; Light

sources; Time-resolved spectroscopy: Titanium; TiO; Aluminum; AlH; AlO; 9292.

Atomic spectra: Energy levels; Iron: Iron, lifetimes in; Lifetimes

in Fe i; Radiative lifetimes: Spectroscopy; J. 71A 6-472,

56 7-573 (1967).

Atomic spectra; Intensities; Spectral lines; Ultraviolet; Mono.

32, Supplement.

Atomic spectra; Iron; Oscillator strengths; Transition probability: Ultraviolet lines of Fe i;J. 70A 4-409, 325-371 (1966).

Atomic spectra: Krypton; Photoionization; Vacuum ultraviolet; Xenon; 9208.

Atomic spectra; Multiplet tables; Rare-earth spectra; Spectra,

far ultraviolet; Transition probabilities; 9210.

Atomic spectra; Transition probabilities: Argon; J. 71A 6-473,

575-583(1967).

Atomic spectra Si i; First spectrum; Multiplet table; Silicon; Spectrum, Si i; Wavelengths, Si i; Atomic energy levels; NSRDS-NBS3, Section 2. Atomic spectroscopy; Electronic energy levels; Neutral atom; Promethium; Rare earth; 7. l\K6-475, 58 7-599(1967).

Atomic spectrum; Calculated wavelengths: Nitrogen; Spectrum;

Vacuum ultraviolet: 9339.

Atomic spectrum of silicon: Carbon spectra; Electrodeless

discharge; Germanium spectra; Nitrogen spectra; Silicon i; Silicon spectra; Vacuum ultraviolet standards; 9337.

Atomic term value; Oscillator strengths: Wavefunctioiis; J. 71

2-448, 163-168(1967).

Atomic time: Cesium atomic beam; Frequency and time stan- dards; Standards; Standard time scales: Atomic frequency

standards; 9387.

Atomic weight; Isotopic abundances; Magnesium; Absolute

ratios; J. 70A 6-416, 453-458 (1966).

Atomic weights; Coulometric analysis; Gas analysis: Mass spec- trometric gas analysis: Microchemical analysis; Polarographic

analysis; Standard reference materials, analysis of; Stoichiometry; TN403.

Atoms; Compressibility; Heat of sublimation; Molecules;

Potential functions; Empirical and semi-empirical; Transport

properties; Virial coefficients; TN246.

Atoms; Mass; Mechanisms; Nitrogen; Olefins; Rates; Spectrometry; 9329.

Atom-transfer reaction; Carbon dioxide; Carbon monoxide; Gas

phase; Hydrogen atom; Hydroxyl-radical; Rate constant; Activation-energy; 9328.

a-trideuteromethyl-j3,|8-dideuterostyrene; Lowering of steric repulsions: Polymeric anion; AH; AS; Equilibria; Equilibrium

concentration of monomer; 9254.

Attenuation; Measurements; Standards; Tutorial; Microwave;

Mono. 97. Attenuator; Bridge; High frequency; Inductive voltage divider; Ratio transformer; J. 71C 2-249, 101-109 (1967).

Audio frequency; Thermal voltage converter; Inductive voltage

divider; Measurement: Phase-angle; Standard; TN347.

Au hi; Calculated transition strengths; Configurations 5cP6s and

5d%p;J. 11X2-446, 149-156 (1967).

Auroral absorption; Auroral radar; Ionospheric disturbances;

Polar cap absorption: Solar protons; Sporadic-E; 9193.

Auroral infrasound; Infrasonic waves; Thermal structure; At- mospheric resonances; 9186.

Auroral radar; Ionospheric disturbances; Polar cap absorption;

Solar protons; Sporadic-E; Auroral absorption; 979i.

Autocorrelation; Correlation; End-to-end length: Fokker-Planck

equation; Polymer chain dynamics; Radius of gyration; Relaxation; Statistical-bead model; 9515.

Autoionization; Electronic; Excited states; H2O+; NH3+; NH2+;

OH+1 ions; Heats of formation; Ionization thresholds: Mass

spectrometer; Photoionization; Radicals; Rydberg levels; J. 70A 6-4 17, 459-463 (1966).

Autoionization; 1 ,2-dideuteroethylene: Ethylene; Mass spectra;

Photoionization; Rydberg; Threshold energies; 9281

Automated type composition; Computerized typesetting;

Graphic arts; Photocomposition; Printing and publication;

Mono. 99. Automatic data processing equipment; Confidentiality audits; Disaggregation: Disclosure criteria; Federal statistical system: Inherent computability; Matching; Probability master

samples; Propagation of error computations; Statistical stan- dards: 9247.

Automatic document distribution; Flexible tubing pump; Invert- ing amplifiers; Laser beam phase shift; Laser heterodyning;

Liquid metering pump; Optical refractive index; Programmed

document distribution; Relaxation oscillator; Rotatable document bin array; TN437.

Automorphic forms: Discontinuous groups; Fourier expansion;

//-groups; y. 71B 4-239, 167-169(1967).

Auxiliary generator; Bridge; Coaxial choke; Mutual inductor;

Stray magnetic field; Transformer; J. 70C 4-233, 221-226

(1966).

Averaging spheres; Diffuse reflectance; Emissivity; Emittance;

Flux averaging devices; Infrared reflectance; Spectral

reflectance; Spectral emittance; Specular reflectance; TN4I5.

Axial-vector current; Chiral; Ga; G*; Representation-mixing;

Sum-rules; Vector current: 9353.

A15-type phases; Chromium alloys; Electron compounds; Inter- mediate phases: Nonstoichiometric phases; Osmium alloys;

Platinum alloys: Transition elements; Alloy phases; Atomic

ordering; 9517.

B

Balance; Balance calibration: Balance equilibrium; Balance sensitivity: Density; Double substitution weighing; Hydrostatic

balance; Hydrostatic weighing: Silicon density: Substitution

balance; Volumetric measurement; J. 71C 3-254, 179-198

(1967).

Balance calibration: Balance equilibrium: Balance sensitivity;

Density; Double substitution weighing; Hydrostatic balance;

131
Hydrostatic weighing; Silicon density; Substitution balance:

Volumetric measurement; Water density; J. 71C 3-254,

179-198(1967).

Balance equilibrium; Balance sensitivity; Density; Double substitution weighing; Hydrostatic balance; Hydrostatic

weighing; Silicon density; Substitution balance; Volumetric

measurement; Water density; Water weighing; J. 71C 3-254,

179-198(1967).

Balance sensitivity; Density; Double substitution weighing;

Hydrostatic balance; Hydrostatic weighing; Silicon density;

Substitution balance; Volumetric measurement; Water density; Water weighing; Air density; Balance; J. 71C 3-254,

179-198(1967).

Band contours; BF3; Coriolis force; Force fields; High resolution; Infrared; v^: Vibration-rotation; ^3; ^4; 9268.

Bandstructure; Insulator; Magnetic susceptibility; Pauli paramagnetism; Semiconductor; Strontium titanate; 9453.

Barium fluoride; Electric hygrometer; Humidity; Thin films; Vacuum; Adsorption; J. 71C i-255, 199-207 (1967).

Barium tetragermanate; Structure; Benitoite; Crystal; X-ray; 7. 7QA 5-411, 385-391 (1966).

Barrier to rotation; Electrostatic model; Inelastic neutron scat- tering; Phosphonium iodide (PH4I); 9503.

Bars, concrete reinforcement; Concrete construction, supports;

Reinforced concrete construction; Reinforcement bars; Wire

bar supports; PS7-66.

Baryon; Branching ratio; Decay; Decay width; Meson;

Resonances; Spurious; Symmetry breaking; U(12) theory;

9166.

Baryon resonances; Classification; Decay widths; Higher symmetry; SU(3); SU(6)„; 9295.

Bases; Dissociation constant; Emf measurements; Morpholine;

Morpholinium ion; Thermodynamic quantities; 9460.

Basic and applied research; Calibration; Instrumentation; In- terchangeability of parts; Mass production; Standardization;

Testing; 9350.

Basic and applied research; Economics of corrosion; Industrial design; Materials protection; Structural failure; 9351

Basic cut-sets; Cut-sets; Graph theory; Network flows; Mathematics; Segs; 7. 71B 4-242, 183-186(1967).

Basing connections; Characteristics; Electron tubes; Similar

types; Tabulation; H103.

Bassali's theory; Concentric loading; Circular plates; Deflection; Elasticity; Experimental; Flexure; Point supports; Simplified approximate solutions; Thin plates; J. 70C 4-234,

227-244(1966).

Bathtubs; External wall units; Innovation; Long-time behavior;

Performance standards; Accelerated tests; 9452.

Batteries; Battery classification; Battery performance; Battery

terminals; Battery tests; Battery types; 9234.

Battery classification; Battery performance; Battery terminals;

Battery tests; Battery types; Batteries; 9234.

Battery performance; Battery terminals; Battery tests; Battery

types; Batteries; Battery classification; 9234.

Battery terminals; Battery tests; Battery types; Batteries; Bat- tery classification; Battery performance; 9234.

Battery tests; Battery types; Batteries; Battery classification; Battery performance; Battery terminals; 9234.

Battery types; Batteries; Battery classification; Battery per- formance; Battery terminals; Battery tests; 9234.

Bayard-Alpert gages; Cold cathode vacuum gages; Conductance

pressure dividers; Hot cathode vacuum gages; Ionization

gages; Vacuum gage calibration systems; Vacuum gages;

Volumetric pressure dividers; TN298.

Beam bending; Fiber elongation; Glass; Glass standard; Glass

viscosity; Lead-silica glass; Restrained sphere; Rotating cylin- ders; Standard; Standard reference material; Viscosity;

Viscosity standard; M260-1 1

Benefit-cost analysis; Transportation economics; Transport

systems; Systems analysis; State of the art; TN294.

Benitoite; Crystal; X-ray; Barium tetragermanate; Structure; 7. 70A 5-411, 385-391 (1966).

Bernstein; Chebyshev; Approximations; Convergence; Multidimensional; Polynomials; Functions; Variables;

Hermite-Fejer;7. 708 3-182, 211-218(1966).

Beryllium; Thermoanalytical standards; Tricalcium silicate; Spectrophotometry; Antimony; High precision determination

of nickel; Simultaneous determination copper; Cobalt;

"releasing agents" in flame emission and atomic absorption;

Magnesium; Ferrous SRMs; TN402.

Beryllium aluminate (1:3); Drop calorimetry; Enthalpy measurements; High-temperature calorimetry; Mixed oxides; Specific

heat; Thermodynamic properties; J. 71A 2-439, 97-103

(1967).

Beryllium aluminate; Chrysoberyl, drop calorimetry; Enthalpy

measurements: High-temperature calorimetry; Mixed oxides:

Specific heat; Thermodynamic properties; 7. 71X2-438, 89-95

(1967).

Beryllium oxide; Calorimetry: Chemical propulsion; Equilibri- um; Estimates: Thermodynamics; 9301

Beryllium 1 :3-aluminate: Enthalpy; Entropy; Gibbs energy:

Heat capacity: Low temperature calorimetry: Thermodynamic properties;7. 71A 1-429, 3-8 (1967).

Bessel functions; Indefinite integrals: 7. 71B 2&3-207, 131-141

(1967). Beta zirconium hydrides; Statistical model; Zirconium hydrides;

9302.

BF3; Coriolis force; Force fields: High resolution; Infrared; vs; Vibration-rotation; ^3; Band contours: 9268.

Bias of least squares estimators: Coefficient of variation; Correlated estimators; Enthalpy adjustments; Heat of vaporization:

High temperature chemistry: Overestimation of standard

deviation; Second law heat; Slope estimators: 7. 70A 6-424,

533-539, (1966).

Bibliography: Compilation of data; Composition: Critical field; Critical temperature; Crystallographic data; Low temperature; Superconductivity; TN408.

Bibliography; Computer: Electrodeposition; Electron back

scatter: Electron probe microanalyzer; Emission spectroscopy; Laser probe; Mass spectroscopy; Photographic

photometry; Plasma jet; Preconcentration: Pulse height

analyzer: Spectrochemical analysis: TN401

Bibliography; Data index; Elements; Isotopes; Nuclear physics;

Photonuclear reactions: M277, Supplement 1

Bibliography: Device reliability: Diodes: Failure mechanisms;

Failure modes: Second breakdown; Semiconductor devices;

Thermal breakdown; Transistors; TN431

Bibliography; Indexed; Flame; Spectroscopy; Analytical emission: Atomic absorption: Electrical discharge; M281.

Bibliography: Low pressure measurement; Techniques of vacuum measurement; Vacuum index; Vacuum measurement;

Mono. 35, Supplement 1

Bimolecular; Chemical kinetics; Data; Gas; Rate constants: Reactions; Tables; Activation energies; Arrhenius equation;

NSRDS-NBS9.

Binary: Bridge-separable; Even; Graphic: Matroid; 7. 71B

4-245,213-214 (1967).

Binomial coefficients: Bounds: Polynomials; 7. 71B 1-190, 9-10

(1967).

Bi-nuclear complex; Copper (II) acetate monohydrate;

Polarized electronic absorption spectrum; Tentative assignment based on selection rules; 9155.

Biological; Botanical samples; Carbon in sodium; CockroftWalton generator: Digital computers; Flux monitors; High

precision 14 MeV neutron activation: Homogeneity testing;

Instrumentation; NBS Linac; NBS reactor; Photoneutron

reactions; Self absorption corrections: Standard reference

materials: Vanadium in irons and steels; Activation analysis;

TN428.

132
Biorthogonal functions; Gamma-ray penetration theory;

Neutron penetration theory; Polynomial approximations; J. 71B4-244, 197-211 (1967).

Bis(acetylacetonato) copper (II); Bis(3-phenyl-2,4-pentanedionato) copper (II); Crystal spectrum; Polarized spec- trum; 9426.

Bis(3-phenyi-2,4-pentanedionato) copper (II); Crystal spectrum:

Polarized spectrum; Bis(acetylacetonato) copper (II); 9426.

BKZ theory; Constant rate of strain; Creep; Elastic fluid; Nonlinear behavior; Polyisobutylene; Recovery; Stress; Relaxation; 7. 70A 6-423. 525-532 (1966).

Blackboards; Dimensions; Natural markings; Slabs; Slate; Stan- dard sizes; Thickness; Tolerances; PS2-66. Blackbodies; Non-blackbody emission; Optical radiation; Radiometry; Sources; Spectral radiance; 9344.

Blackbody; Graphite; Spectral radiance; Spectroradiometer;

Temperature; Arc; 9326.

Blackbody; International Practical Temperature Scale; Optical;

Photoelectric pyrometer; Radiance sources; Standards; Temperature; 9347.

Blackbody; Lamp standard; Total irradiance; 9406.

Black glass beads; Thermal neutron flux; Absolute gamma ray source strength; 9435.

Black nucleus model; Cryogenic target; Coupled-channel calculation; Nuclear alignment; Nuclear deformation; Optical

model; Van de Graaff; 14 MeV neutrons; "*'Ho; 9362.

Block; Rank; Algorithm; Matrix; 7. 708 3-183, 219-220 (1966).

Boiling sodium chloride solution; Delayed failure; High strength

steel; Hydrogen diffusion; Hydrogen embrittlement; Internal

initiation; Stress corrosion; 9478.

Boil test; Bonding; Exterior; Grading; Interior; Moisture content; Overlay; Plywood; Shear test; Vacuum and pressure

test; Adhesives; PSl-66.

Boltzmann equilibrium; Excitation; Ionization; Line intensity;

Saha equilibrium; Spark; Spectrochemical analysis; Spectroscopic source; Arc; 9361.

Bomb calorimeter; Boron; Boron trifluoride; Fluorine; Heat of

formation; Teflon; J. 71A5-45/, 195-202 (1967).

Bomb calorimeter; Boron trifluoride; Fluorine; Heat of combustion; Heat of formation; Teflon; Aluminum diboride;

a-aluminum dodecaboride; Aluminum fluoride; J. 71A 4-462.

307-315 (1967).

Bond distances; Cyanogen; Infrared; Molecular structure; Spectra; 9183.

Bonding; Coupling agent; Denture; Plastic; Porcelain adhesion;

Resin; Silane; Teeth; 9494.

Bonding; Dental; Filling materials; Hardening; Shilnkage;

Strain; Stress; Tensile; Adhesion; 9433.

Bonding; Exterior; Grading; Interior; Moisture content; Overlay; Plywood; Shear test; Vacuum and pressure test; Adhesives; Boil test; PSl-66.

Bond in pullouts and beams; Bond strength; Deformed rein- forcement; Review of bond literature; 9760.

Bond length; Broad-line; Carbonyl; Cobalt; Cobalt tetracarbonyl hydride; Hydride; Nuclear magnetic resonance; Proton; 9449.

Bond lengths; Boron; Broad-line; Dimethoxyborane; Hydride;

Nuclear magnetic resonance; Proton; 9450.

Bond strength; Deformed reinforcement; Review of bond litera- ture; Bond in pullouts and beams; 9760.

Bone; Collagen; Hydroxyapatite; Piezoelectricity; Pyroelectricity; Tendon; 9470.

Booklets of faded strips; Fading characteristics; Textiles; Fading standardization; Light-sensitive paper; M260-15.

Borates; Glassformers; Immiscibility; Liquid immiscibility;

Modifiers, network; Oxide systems; Silicates; 9475. Borax; Ion-exchange resin; Lanolin, soap; 9477.

Boric oxide; Liquid immiscibility; OxHe systems; Phase dia- gram; Scandium oxide; 9476.

Born-Mayer potential; Deformation dipole model; Effective force constants; Isotopic impurities; Local mode frequencies;

Nearest-neighbor interaction; Substitutional impurity; U-centers; Alkali halide crystal; 9354. Boron; Boron carbide; Carbon; Fluorine; Heat of combustion;

Polytetrafluoroethylene (Teflon); Refractory compounds;

Aluminum borides; 9270. Boron; Boron trifluoride; Fluorine; Heat of formation; Teflon;

Bomb calorimeter;/. 71A 5-^57, 195-202 (1967). Boron; Broad-line; Dimethoxyborane; Hydride; Nuclear magnetic resonance; Proton; Bond lengths; 9450. Boron; Fluorine; NMR; Polysilanes; Silicon; Sub-halides; 9229.

Boron carbide; Carbon; Fluorine; Heat of combustion;

Polytetrafluoroethylene (Teflon); Refractory compounds;

Aluminum borides; Boron; 9270.

Boron trifluoride; Fluorine; Heat of combustion; Heat of formation; Teflon; Aluminum diboride; a-aluminum dodecaboride;

Aluminum fluoride; Bomb calorimeter; 7. 71A 4-462. 307-315

(1967).

Boron trifluoride; Fluorine; Heat of formation; Teflon; Bomb

calorimeter; Boron; 7. 71Ai-4J7, 195-202 (1967).

Borosilicate crown glass; Glass; Index of refraction; Relaxation

times; Two-relaxation time model; Volume relaxation; Annealing; J. 71 A i-4J6, 231-238 (1967).

Botanical samples; Carbon in sodium; Cockroft-Walton generator; Digital computers; Flux monitors; High precision 14 MeV neutron activation; Homogeneity testing; Instru- mentation; NBS Linac; NBS reactor; Photoneutron reactions; Self absorption corrections; Standard reference materials; Vanadium in irons and steels; Activation analysis; Biological;

TN428.

Bounds; Eigenvalues; Nonnegative matrices; J. 71B 1-195,

39-41 (1967).

Bounds; Elementary abelian groups; Generator rank; Sylow

subgroups; J. 71B 4-251. 247-248 (1967).

Bounds; Polynomials; Binomial coefficients; J. 71B 7-790, 9-70

(7967).

Bowls; Brass; Dimensions; Nuts; Plastic; Plimbing equipment;

Tanks; Valves; 7^56-66

Boxcar integrator; Nuclear magnetic resonance; Phonon nuclear

interaction; Ultrasonics; TN344.

Branching ratio; Decay; Decay width; Meson; Resonances;

Spurious; Symmetry breaking; U( 12) theory; Baryon; 9766.

Branchings; Combinatorics; Graphs; Linear programming;

Traveling salesman; Trees; Algorithms; Arborescences; J. 11R4-249, 233-240 (1967). Brass; Dimensions; Nuts; Plastic; Plimbing equipment; Tanks;

Valves; Bowls; PS6-66.

Bridge; Coaxial choke; Mutual inductor; Stray magnetic field; Transformer; Auxiliary generator; J. 70C 4-233, 221-226

(1966).

Bridge; High frequency; Inductive voltage divider; Ratio trans- former; Attenuator;/. 71C 2-249, 101-109 (1967).

Bridge-separable; Even; Graphic; Matroid; Binary; J. 71B

4-245.213-214(1967).

Brightness temperature; Color temperature; Effective

wavelength; Infrared and far infrared optical pyrometry;

Planck equation; Rayleigh-Jeans equation; Spectral radiance;

Wien equation; 9i70.

Brittle polymers; Fracture topography; Kinetics; Polymeric

solids; Primary fracture front; Topography; 9487.

Broadcast of standard frequencies; High frequency; Low

frequency; Standard frequencies; Time signals; Very low

frequency; M236, 1967 Edition.

Broadcast of standard frequencies; High frequency; Low

frequency; Standard frequencies; Time signals; Very low

frequency; 9237.

Broad-line; Carbonyl; Cobalt; Cobalt tetracarbonyl hydride;

Hydride; Nuclear magnetic resonance; Proton; Bond length;

9449.

133
Broad-line; Dimethoxyborane; Hydride; Nuclear magnetic

resonance; Proton; Bond lengths; Boron; 9450.

Brush-cathode plasma; Collisional-radiative recombination;

Helium afterglow; Recombination coefficient; 9371.

Bubble structure; Continuity of coating; Corrosion resistance; High-voltage testing; Porcelain enamel; Porcelain enamel defects; 9223.

Built-up roofing; Deterioration insulation; Radiative cooling;

Solar heating; 9249.

Built-up roof membrane; Innovation; Preventive measures;

Splitting failures; Thermal shock; 9207.

Bulk viscosity; Macroscopic equations of motion; Macroscopic

variable; Non-equilibrium kinetic energy; Temperature; Total

energy; 9313.

Burnout test; Fire load; Fire performance; Flame penetration;

Potential heat; Structural load; Apartment dwelling; BSSIO.

Burnout tests; Fire endurance; Fire severity; Floor tests; Steel

plate floors ;B557 7. Burst of leather; Extension; Grain-crack; Mullen test; 9466.

Butadiene-acrylonitrile copolymer; Butadiene-styrene

copolymers; Crystallization of rubber; Elastomers; Polybutadiene; Polyethylene; Polyisobutylene; Rubber; Specific

heat; 9520.

Butadiene-styrene copolymers; Crystallization of rubber;

Elastomers; Polybutadiene; Polyethylene; Polyisobutylene;

Rubber; Specific heat; Butadiene-acrylonitrile copolymer;

9520. Butane; Ionization efficiency; Ion-molecule reactions; Ion-pair

yields; Photoionization; Superexcited molecule; 9272.

c

Cadmium; Dithizone; Silver; Sub-stoichiometric radioisotopic

dilution analysis; Trace amounts; 9168.

CaF2; Conductivity; Crystals; Defect pairs; Dielectric relaxation; Electrode capacitance; Surface layers; J. 71A 5-465,

355-362(1967).

CaF2; ZnS; Electric fields; Ionic crystals; Lattice sums; Point

defects; Polarization; NaCl; CsCl; J. 71A 1-428. 1-2 (1967).

Calcite; Crystal growth; Crystals; Vapor phase diffusion; 9320.

Calcium; Hydroxyapatite; Phosphate; Solubility isotherm;

9212.

Calcium chloride; Concrete; Corrosion in concrete; Corrosion

in plaster; Dissimilar metals; Galvanic corrosion; Gypsum

plaster; Aluminum conduit; 9497.

Calcium chloride; Isopiestic measurements; Mixed salt solu- tions; Sodium chloride; Vapor pressure of aqueous solutions; J.10A4-406. 313-318 (1966).

Calcium chloride; Mixed solutions; Activity coefficients; Isopiestic measurements; Vapor pressure; J. 70A 4-405. 305-311 (1966).

Calcium fluoride; Elevated-temperature emissivity; Infrared ab- sorption coefficients; Infrared emissivity; Polycrystalline

CaF,; Single-crystal CaF>; 9312.

Calcium molybdate; Crystal orientation; Crystallographic

groups; Interplanar angles; Physical properties; Scheelite

structure; Single crystal; X-ray back-reflection; J. 70A 5-410,

379-384(1966).

Calcium molybdate; Crystal growth; Lithium sulfate; Single

crystals; Temperature gradient zone melting; Traveling sol- vent; 9496.

Calcium molybdate; Dielectric constant; Lead molybdate; Sin- gle crystal; 9434.

Calcium-phosphate ion-pairs; Solubility of dicalcium phosphate

dihydrate; Solubility of dibasic calcium phosphate dihydrate;

Solubility of calcium monohydrogen phosphate dihydrate at 37.5 °C:J. 70A 6-426. 545-552 (1966).

Calculable inductor; Current balance; National electrical units; Nonmagnetic facility; Pellat dynamometer; Proton precession

frequency; Absolute ampere determination; 9325.

Calculated transition strengths; Configurations 5d''6s and 5cf6p;

Au in; J. 71X2-446. 149-156 (1967).

Calculated wavelengths; Nitrogen; Spectrum; Vacuum ul- traviolet; Atomic spectrum; 9339.

Calculation; Ionization; Neutral; Rare earths; Series; 9384.

Calculation of kinetic parameters; Determination of activation

energies; Preexponential factor; Stability of polymers; Thermogravimetric analysis; Variation of the activation energy;

9192.

Calculations; Electronic states, energies of formation; Energies

of motion; Interstitials; Point defects; Theory; Vacancies;

Vibrational states; M287.

Calibration, high-frequency voltages; Measurement, microwave

voltages; Voltage, high-frequency, calibration; Voltage measurements; Voltage Tee; 9266.

Calibration, permanent magnet standards; Magnet standards;

Permanent magnet standards; Reference magnets; 9245.

Calibration (USES); Frequency standards; Gas cells; Per- formance (long term); Reliability; Rubidium; Stability; Aging;

TN341.

Calibration; Calibration designs; Combinatorial analysis; Dif- ference sets; Incomplete block designs; Statistical experiment

designs; Tournaments; Weighing designs; J. 718 4-237,

149-160(1967).

Calibration; Commodity transfer; Cryogenic; Cryogenic

processes; Density; Flowmeters; Mass flow; Mass flowmeters; Performance results; Propellant management; Substitute

fluid; Volume flow; Accuracy; 9428.

Calibration; Comparison; Effective aperture; Electromagnetic

horns; Gain; Measurement; Microwave; Mismatch errors; Rayleigh distance; Standard gain horns; Antennas; TN351.

Calibration; Comparison calibration; Frequency range; Shaker;

Vibration; Accelerometer; 9306.

Calibration; Console; Electrical; Measurement; Ratio; Stan- dards; Voltage; Volt box; 7. 70C 3-22 9. 1 73-1 85 (1966).

Calibration; Direct-current; High-voltage; Ratio; Safety; Stan- dards enclosure; Transformer; Voltage-divider; Voltmeter;

Alternating-current; TN349.

Calibration; Errors; Heating; Voltage divider; Volt-box; 9305.

Calibration; Instrumentation; Interchangeability of parts; Mass

production; Standardization; Testing; Basic and applied

research; 9350.

Calibration; Microphones; Standard; 9342.

Calibration; Performance; Test method; Dynamic calibration and telemetering; Electro-mechanical; Pressure; Transducer;

TN411.

Calibration console; Console; High measurement accuracies;

Human engineering; Volt boxes; 9184.

Calibration designs; Combinatorial analysis; Difference sets; In- complete block designs; Statistical experiment designs; Tour- naments; Weighing designs; Calibration; J. 71B 4-237,

149-160(1967).

Calibration of germanium resistors; Germanium resistors; Thermometry; 7. nc 1-441,29-41 (1967).

Calibration points; Complex laboratory-scale model; Computer;

Coordinate systems; Digital computer; Number of points;

9202.

Calibrations; Conferences, 1966 Standards Laboratory; Foreign

standards laboratories; Laboratory management; Measure- ments and standards; Measurement system; National Conference of Standards Laboratories; M291

Calorimeter; Calorimetry; Complex ion; Enthalpy determination; KCl-CdCU system; Molten salts; 9485.

Calorimeter; Cavity ionization chamber; Cobalt-60 gamma rays; Comparison; Graphite; H^ s,„; Absorbed dose; 71C 1-440,

19-27(1967).

134
Calorimetry: Chemical propulsion; Equilibrium; Estimates;

Thermodynamics; Beryllium oxide; 9301.

Calorimetry; Complex ion; Enthalpy determination; KCI-CdCl>

system; Molten salts; Calorimeter; 9485.

Carbene; Ethylene; Ethylidene; Gas phase; Photolysis; Solid

phase; Vacuum ultraviolet; 9415.

Carbohydrate reference materials; Metallo-organic standard

reference materials; Air-pollution studies; Oxidation of polycyclic aromatic hydrocarbons; Sugars in solution; Conformational analysis; Carbon-I4- and tritium-labeled carbohydrates;

TN405.

Carbon; Copper; Germanium; Ritz; Silicon; Spectrum; Stan- dards; Ultraviolet; Vacuum; Wavelengths; 9338.

Carbon; Fluorine; Heat of combustion; Polytetrafluoroethylene

(Teflon); Refractory compounds; Aluminum borides; Boron;

Boron carbide; 9270.

Carbon atom production; Carbon atom reactions; Cyanogen

azide; Force constants; Infrared spectrum; NCN free radical; Thermodynamic properties; Ultraviolet photolysis; 9369.

Carbon atom reactions; Cyanogen azide; Force constants; In- frared spectrum; NCN free radical; Thermodynamic properties; Ultraviolet photolysis; Carbon atom production; 9369.

Carbon dioxide; Carbon monoxide; Gas phase; Hydrogen atom;

Hydroxyl-radical; Rate constant; Activation-energy;

Atom-transfer reaction; 9328.

Carbon ii; Coulomb approximation; Electron density; Electron

temperature; Equivalent electrons; Local thermal equilibrium;

Oscillator strength (f-value); Optical depth; Oxygen ii; Plasma; T-tube; 9388.

Carbon in sodium; Cockroft-Walton generator; Digital computers; Flux monitors; High precision 14 MeV neutron

activation; Homogeneity testing; Instrumentation; NBS

Linac; NBS reactor; Photoneutron reactions; Self absorption

corrections; Standard reference materials; Vanadium in irons and steels; Activation analysis; Biological; Botanical

samples; TN428.

Carbon monoxide; Forbidden transition; High resolution; Spec- trum; Vacuum ultraviolet; Absorption; 9330.

Carbon monoxide; Gas phase; Hydrogen atom; Hydroxyl-radical; Rate constant; Activation-energy; Atom-transfer reaction; Carbon dioxide; 9328.

Carbon monoxide; Spectrum; Review; NSRDS-NBS5.

Carbon spectra; Electrodeless discharge; Germanium spectra;

Nitrogen spectra; Silicon i; Silicon spectra; Vacuum ul- traviolet standards; Atomic spectrum of silicon; 9337.

Carbon tetrachloride; Cyclohexane; Ethylbenzene; Extinction

coefficient; Polymer; Polystyrene; Solvent effects; Ultraviolet

absorption; y. 71 A 2-449, 169-175 (1967).

Carbon tetrafluoride; Fluorine; Fluorine bomb calorimetry;

Graphite; Heat of combustion; Heat of formation; Hydrogen

fluoride aqueous; Teflon; Aluminum fluoride; J. 71 A 2-440,

105-118 (1967).

Carbonyl; Cobalt; Cobalt tetracarbonyl hydride; Hydride;

Nuclear magnetic resonance; Proton; Bond length;

Broad-line; 9449.

Carbon- 14- and tritium-labeled carbohydrates; Large-scale

paper chromatography; Phenylhydrazono-phenylazo tau- tomerism; Cyclopentitols and related substances; Unsaturated

alditols; Infrared spectra of acylamido derivatives; Car- bohydrate reference materials; TN405.

Carbon- 14-labeled L-fucose; L-fuconic acid-7-'^C;

L-fucose-/-'*C; Radioactive carbohydrates; Synthesis of

radioactive sugars; J. 71 A 2-444, 133-136 (1967).

Case hardening; Chemical composition; Hardening; Heat treat- ment; Ni-maraging steels; Normalizing; Stainless steels; Structural steels; Surface hardening; Tempering; Tool steels; Annealing; Mono. 88. Cast iron pipe, requirements; Soil pipe and fittings; Soil pipe

dimensions; CS188-66.

Cast iron radiators; Radiators, cast iron; Radiator ratings;

Radiator sizes; S PR 174-65.

Catalog; Certificate; Characterization; Composition; Price list; Property of material; Purity of material; Standard reference

materials; Standards; Analysis; M260. 1967 Edition.

Cathodoluminescence; Electron probe; Microanalysis; X-ray

spectrometry; Scanning electron microscopy; Electron

backscatter; TN278.

Cation exchange capacity; Cone-plate viscometer; Crystallinity;

Flow properties; Kaolins; Surface area; 9491

Cavitation; Cavitation nucleus; Cavitation threshold; Fission-in- duced cavitation; Neutron-induced cavitation; Radiation-induced cavitation; Threshold; Acoustic cavitation; Alpha-particle-induced cavitation; J. 71C 4-261, 299-312 (1967).

Cavitation nucleus; Cavitation threshold; Fission-induced

cavitation; Neutron-induced cavitation; Radiation-induced

cavitation; Threshold; Acoustic cavitation; Alpha-particle-induced cavitation; Cavitation; 7. 71C 4-267, 299-312 (1967).

Cavitation threshold; Fission-induced cavitation; Neutron-induced cavitation; Radiation-induced cavitation; Threshold;

Acoustic cavitation; Alpha-particle-induced cavitation; Cavitation; Cavitation nucleus; 7. 71C 4-261, 299-312 (1967).

Cavity ionization chamber; Cobalt-60 gamma rays; Comparison;

Graphite; W-s,,,; Absorbed dose; Calorimeter; J. 71C 1-440,

19-27(1967).

Ceramic moving element; Electrodynamic shaker; Piezoelectric

accelerometers; Reciprocity; Secondary standard; Vibration

standard; Air bearing; 9297.

Ceramic oxides; Emittance; Error sources; Magnesia; Measurement uncertainties; Spectral emittance; Thermal radiation; Thoria; Zirconia; Alumina; J. 70A 5-412, 393-415 (1966).

Ceramics; Lattice defects; Nuclear fuels; Nuclear science and

technology; Radiation damage; Reactor materials; M285.

Cerous magnesium nitrate; Low temperature scale; Magnetic

thermometer; 9334.

Certificate; Characterization; Composition; Price list; Property

of material; Purity of material; Standard reference materials; Standards; Analysis; Catalog; M260, 1967 Edition.

Certification and labeling plans; Government standardization,

U. S.; Specifications; Standardization activities, U. S.; Stan- dards; Test methods; M288.

Certified value; Eighteen cooperating laboratories; Vacuum fu- sion; Inert gas fusion; Oxygen; Ferrous standard reference

materials; CO by infrared absorbancy; Homogeneity;

M260-14.

Cesium atomic beam; Frequency and time standards; Standards;

Standard time scales; Atomic frequency standards; Atomic

time; 9387.

C¥i, Dipole moment; Free radical; Microwave spectrum; Structure; 9380.

CF2 reactions; CF3 free radical; CFsBr photolysis; F atom reactions; HCF3 photolysis; Infrared spectrum; Matrix isolation technique; 9368.

CFaBr photolysis; F atom reactions; HCF3 photolysis; Infrared spectrum; Matrix isolation technique; CF2 reactions; CF3 free

radical; 9368.

CF3 free radical; CFsBr photolysis; F atom reactions; HCF3

photolysis; Infrared spectrum; Matrix isolation technique;

CF2 reactions; 9368.

CH; Chemiluminescence; Cross section; Emission spectrum;

Energy transfer; Experimental; Gas; Oxygen atom; Oxidation; Population distribution; Rotation; Acetylene; 9288.

Chain fold; Chain rotation; Chain twisting; Defect; Dielectric

relaxation; Mechanical relaxation; Polychlorotrifluoroethylene; Polyethylene; Polymer; Semicrystalline; Vacancy;

Annealing; 9462.

Chain-folded crystals; Crystal growth; Kinetics; Multicomponent systems; Surface free-energy; J. 71A 4-458, 261-275

(1967).

135
Chain folding; Crystal growth; Crystallization kinetics; Homogeneous nucleation; Interfacial energy; Nucleation;

Polychlorotrifluoroethylene; Polyethylene; Polymers; Surface

free energy; 9454.

Chain polymer; Critical energy; Generating function; Lattice

model; Partition function; Random walk; Adsorption; J. 70B

4-185.237-247 (1966).

Chain rotation; Chain twisting; Defect; Dielectric relaxation;

Mechanical relaxation; Polychlorotrifluoroethylene;

Polyethylene; Polymer; Semicrystalline; Vacancy; Annealing;

Chain fold; 9462.

Chain twisting; Defect; Dielectric relaxation; Mechanical relax- ation; Polychlorotrifluoroethylene; Polyethylene; Polymer;

Semicrystalline; Vacancy; Annealing; Chain fold; Chain rotation; 9462.

Chains; Cycles; Jacobi matrices; Triple diagonal matrices;

J. 7134-246,215-224 (1967).

Change of pK with dielectric constant; Hammett sigma constants; Ionization constants; pK values in ethanol-water;

Sigma constants in ethanol-water; Substituted benzoic acids:

Allyl- and propenylbenzoic acids; J. 71A 5-468. 379-384

(1967).

Characteristic electron energy loss; Far ultraviolet; Germanium;

Kronig- Kramers dispersion relations; Optical properties; Sum

rules; 9345.

Characteristic impedance; Inductance; Strip-transmission lines;

y. 71C 1-444.59-67 (1967).

Characteristics; Conductive; Flooring; Installation; Standards;

Adhesive industrial; 9177.

Characteristics; Electron tubes; Similar types; Tabulation; Basing connections; H103.

Characteristics; Impact; Linear viscoelasticity; Partial dif- ferential equations; Stress waves; Wave propagation; J. 70B

4-187.257-264(1966).

Characteristics tabulation; Electron tubes; Microwave electron

tubes; Tabulation; H104.

Characteristic values; Coefficients; Joining factors; Mathieu's

equation; ^M559.

Characterization; Composition; Price list; Property of material; Purity of material; Standard reference materials; Standards;

Analysis; Catalog; Certificate; M260. 1967 Edition.

Characterization of chemical structures; Disaccharide of d-lyxofuranose; Infrared absorption methods for analysis of car- bohydrates; Naturally occurring monosaccharides and

6-deoxy sugars; Oxidation of polycyclic aromatic hydrocarbons; TN427.

Charge carrier lifetime; Lithium-compensated silicon; Semiconductor nuclear radiation detectors; 9438.

Charged particles; Electrons and photons; Interaction of radiation; Radiation, charged particles; 9250.

Chebyshev; Approximations; Convergence; Multidimensional;

Polynomials; Functions; Variables; Hermite-Fejer; Bernstein; J. 1^3-182. 211-218 (1966).

Chebyshev series; Difference equations; Error analysis; Miller

algorithm; Recurrence methods; Special functions; J. 718

2&3-206. 1 1 1-129 (1967).

Chebyshev series; Difference equations; Error bounds; Miller

algorithm; Recurrence relations; Special functions; J. 718

4-238. 161-166(1967).

Chemical; Computers; Hayward notation; Information retrieval; Linear notation; Structures; Substructure searches; 9482.

Chemical association; Lennard-Jones potential parameters; Virial coefficients; Water vapor-air mixtures; J. 71A 3-454,

219-224(1967).

Chemical attack; Cold working; Corrosion; Cracking; Stainless

steels; Steels; Stress corrosion; Atmospheric corrosion tests; 9479.

Chemical composition; Hardening; Heat treatment; Ni-maraging steels; Normalizing; Stainless steels; Structural steels;

Surface hardening; Tempering; Tool steels; Annealing; Case

hardening; Mono. 88. Chemical kinetics; Data; Gas; Rate constants; Reactions; Tables; Activation energies; Arrhenius equation; Bimolecular;

NSRDS-NBS9.

Chemical literature; Critical data; Data evaluation; Errors; 9309.

Chemical propulsion; Equilibrium; Estimates; Thermodynamics; Beryllium oxide; Calorimetry; 9301

Chemical resistance; Porcelain enamel; Sanitary ware; Sheet

steel; Abrasion resistance; PS5-66.

Chemical separation; Distillation; Neutron-activation; Telluri- um; 9169.

Chemical structure analysis; Mossbauer spectroscopy; 9444.

Chemiluminescence; Cross section; Emission spectrum; Energy

transfer; Experimental; Gas; Oxygen atom; Oxidation; Population distribution; Rotation; Acetylene; CH; 9288.

Chemisorption; Desorption; Dissociation; Field emission

microscopy; Kinetic; Nitric oxide; Surface; Surface diffusion; Tungsten; Work function; Adsorption; 9421

Chemisorption; Field emission; Nitrogen; Rhenium; 9340.

Chinese characters; Grammar; Generative grammar; Component combination; Phrase structure grammar; Linguistics;

Frame embedding; Two-dimensional languages; TN296.

Chiral; G^; G*; Representation-mixing; Sum-rules; Vector current; Axial- vector current; 9353.

Chloride; Color centers; Conductivity; Crystal growth; Sodium;

Alkali halides; Aqueous; 9182.

Chlorinated molecular gases; Chlorine; K/3 x-ray emission;

9473.

Chlorine; K/3 x-ray emission; Chlorinated molecular gases;

9473.

Chlorodifluoramine; Infrared spectra; Matrix-isolation; Spectra;

Vibrational assignment; Vibrational fundamentals; 9294.

Chromatic adaptation; Color; Colorblindness; Colorimetry;

Theories of color; 9162.

Chromatic induction; Color; Contrast; Crispening; Opponent

color theory; Surround color; Three components color theory;

9411.

Chromatography on seed-test paper; Large-scale paper chro- matography; Radioactive carbohydrates; Use of heavy papers

in preparative chromatography; 7. 71A 1-436, 49-52 (1967).

Chromium alloys; Electron compounds; Intermediate phases;

Nonstoichiometric phases; Osmium alloys; Platinum alloys;

Transition elements; Alloy phases; Atomic ordering;

A15-type phases; 9517.

Chromospheric flash spectrum; Chromospheric spectrum; Solar

disk; Spectrum; 9259.

Chromospheric spectrum; Solar disk; Spectrum; Chromospheric

flash spectrum; 9259.

Chrysoberyl, drop calorimetry; Enthalpy measurements;

High-temperature calorimetry; Mixed oxides; Specific heat; Thermodynamic properties; Beryllium aluminate; J. 71A

2-438,89-95 (1967).

Circular plates; Concentric loading; Design; Elasticity; Experi- ment; Maximum stresses; Symmetrical bending; Symmetrically distributed load; Theory; J. 71C 1-438, 1-10 (1967).

Circular plates; Deflection; Elasticity; Experimental; Flexure;

Point supports; Simplified approximate solutions; Thin plates; Bassali's theory; Concentric loading; J. 70C 4-234, 227-244

(1966).

Classification; Decay widths; Higher symmetry; SLJ(3);

SLI(6)u-; Baryon resonances; 9295.

Classification design; Combinatorics; Set theory; 7. 718 1-193,

21-22(1967).

Classified line of Yb ii; Spectrum, Yb ii; Ytterbium, second

spectrum; Zeeman effect in Yb ii; Analysis of Yb ii; Atomic

energy levels of Yb ii;^. 71A 6-470. 396-545 (1967).

Claude; Cryogenics; Refrigeration; TN354.

136
Clausius-Mossotti; Density; Dielectric constant; Dilatometer;

Function; High pressure; «-hexane; Pressure; Three-terminal

electrode set;7. 71A 4-460. 287-292 (1967).

Cleanability, porcelain enamel surfaces; Fluorescent soils; Porcelain enamel; Soil, residual; 9222.

Clean room; Computers; Counting rooms; Feedback analysis;

Optimization of variables 10 MW nuclear reactor; Pneumatic

tubes; Radiochemical laboratories; 14 MeV neutron generator; 100 MeV-40 KW LINAC; 9154.

Clebsch-Gordan coefficients; Fortran program; Wigner coeffi- cients; Quantum theory of angular momentum; 3j coefficient;

6j coefficient; 9j coefficient; TN409.

Cloud physics; Infrared light; Light scattering; Mie Theory;

Scattering functions; 9228.

CLSQ program for multicomponent decay; Solid state detectors; Electronic data handling; NBS reactor; NBS Linac;

Cockroft-Walton generator; Digital computers; Activation

analysis; Standard reference materials; Photo-neutron reactions; Flux monitors; TN404.

CO; Diatomic spectrum; Electronic transition; Rotational analysis; Vacuum-ultraviolet region; Absorption spectrum; 9403.

Coated abrasive products; Grain, abrasive; Micron; Overgrade;

Sedimentation; Sieve; Standard sieve; Abrasive grain; Accumulation curve; PS8-67.

Coatings, dry film; Dry film lubrication; Polytetrafluoroethylene; Resin sintered coatings; TFEfluorocarbon; CS274-66.

Coatings; Infrared integrating sphere coatings; Integrating

spheres; Sphere; Sulfur coatings; 9157.

Coaxial; Coupler; Directional; Reflectometer; RF power; 9333.

Coaxial; Flow calorimeter; Radio frequency power; J. 71C

2-250, 111-117(1967).

Coaxial choke; Mutual inductor; Stray magnetic field; Transformer; Auxiliary generator; Bridge; J. 70C 4-233, 221-226

(1966).

Coaxial techniques; Precision coaxial measurements; RF connector; 9381.

Cobalt; Cobalt tetracarbonyl hydride; Hydride; Nuclear magnetic resonance; Proton; Bond length; Broad-line; Carbonyl;

9449.

Cobalt; "releasing agents" in flame emission and atomic absorption; Magnesium; Ferrous SRMs; Stoichiometric mixtures

uranium oxide; Isotope ratio determination; Spectrophotometric titration; Controlled potential coulometric; Molybdenum;

TN402.

Cobalt tetracarbonyl hydride; Hydride; Nuclear magnetic

resonance; Proton; Bond length; Broad-line; Carbonyl;

Cobalt; 9449.

Cobalt-60 gamma rays; Comparison; Graphite; W-s,,,: Absorbed

dose; Calorimeter; Cavity ionization chamber; J. 71C 1-440,

19-27(1967).

CO by infrared absorbancy; Homogeneity; Certified value; Eighteen cooperating laboratories; Vacuum fusion; Inert gas

fusion; Oxygen; Ferrous standard reference materials; M260-14.

Cockroft-Walton generator; Digital computers; Activation analysis; Standard reference materials; Photo-neutron reactions; Flux monitors; Cu, Se. Al, V in irons and steels; Homogeneity

testing; Pneumatic rabbit sensor; Mossbauer spectroscopy;

TN404.

Cockroft-Walton generator; Digital computers; Flux monitors:

High precision 14 MeV neutron activation; Homogeneity

testing; Instrumentation; NBS Linac; NBS reactor; Photo- neutron reactions; Self absorption corrections; Standard

reference materials; Vanadium in irons and steels; Activation

analysis; Biological; Botanical samples; Carbon in sodium;

TN428.

Coefficient of variation; Correlated estimators; Enthalpy adjust- ments; Heat of vaporization; High temperature chemistry;

Overestimation of standard deviation; Second law heat; Slope

estimators; Third law heat; Vapor pressure; J. 70A 6-424,

533-539. (1966).

Coefficients; Joining factors; Mathieu's equation; Characteristic

va\ucs ; A MS59. Coexistence densities; Freezing liquid densities; Hydrogen;

Melting-line liquid densities; Orthobaric densities; Parahydrogen; J. 70A 6-425. 541-544 (1966).

Cold cathode vacuum gages; Conductance pressure dividers; Hot cathode vacuum gages; Ionization gages; Vacuum gage

calibration systems; Vacuum gages; Volumetric pressure

dividers; Bayard-Alpert gages; TN298.

Cold-drawing; Creep; Nickel alloys; Duranickel; Nickel-aluminum precipitates; High temperatures; Deformation; 7. 70C

3-231, 195-205 (1966).

Cold neutrons; Coordination; Hydrated salts; Hydrates;

Hydrogen-bonding; Neutron scattering; Vibration spectra;

Water librations; 9505.

Cold neutrons; Frequency; Inelastic scattering; Metal hydrides;

Neutron scattering; Optical vibration; Vibration spectrum;

9506.

Cold-work; Fe-Ni-Cr alloys: Neel temperature; Shear modulus;

Stainless steel; Antiferromagnetic: J. 70C 3-232, 207-210

(1966).

Cold-worked specimens; Elastic moduli; Internal friction; Nickel-titanium alloy; Temperature dependence; Annealed

specimens: 951 1

Cold working; Corrosion: Cracking: Stainless steels: Steels; Stress corrosion; Atmospheric corrosion tests; Chemical at- tack; 9479.

Collagen: End-to-end bonding: Hydrophobic bonding: Lateral aggregation: Native aggregation; Temperature coefficient; 9436.

Collagen; Hydroxyapatite; Piezoelectricity; Pyroelectricity;

Tendon; Bone; 9470.

Collective model; Cross section: Deformed nuclei; Giant

quadrupole resonances; Photons: Absorption: 9352.

Collisional-radiative recombination: Helium afterglow; Recombination coefficient: Brush-cathode plasma; 9371

Collision cross section; Atom; Molecule: Electron; M289.

Collisions; Continuous: Deexcitation; He: Hes; Metastable;

Radiative; Spectra; Theory: Vacuum-ultraviolet; Atomic;

9367.

Color; Colorblindness; Colorimetry; Theories of color; Chromatic adaptation: 9162.

Color; Contrast; Crispening; Opponent color theory; Surround

color; Three components color theory: Chromatic induction:

9411.

Color; Gloss; Light; Perception of color: Photometry;

Physiological optics; Psychophysics: Scaling of color: 9336.

Colorblindness; Colorimetry: Theories of color; Chromatic

adaptation: Color; 9162.

Color centers; Conductivity: Crystal growth; Sodium; Alkali halides; Aqueous: Chloride; 9182.

Colorimetric; Dithizone; Paint film; Fungicide: Latex; Mercury;

Paint; Analysis: 9431

Colorimetry: Theories of color; Chromatic adaptation: Color;

Colorblindness: 9162.

Colors: Lights: Signal lights; Mono. 75. Color temperature; Effective wavelength; Infrared and far in- frared optical pyrometry; Planck equation: Rayleigh-Jeans

equation; Spectral radiance; Wien equation; Brightness temperature; 9310.

Combination: Ethane; Ethylene; Flash photolysis; Gas phase;

Hydrogen; Hydrogen deuteride; Insertion; Methane;

Methyne; Rate; Vacuum ultraviolet; Acetylene; 9286.

Combination metering and safety valve; High temperatures: Transrotor engine: Platinum resistance; Dynamic analog cor- relation system: TN295.

313-589 0-69— 10 137
Combinatorial analysis; Difference sets; Incomplete block

designs; Statistical experiment designs; Tournaments;

Weighing designs; Calibration; Calibration designs; J. 71B

4-237, 149-160(1967).

Combinatorics; Graphs; Linear programming; Traveling

salesman; Trees; Algorithms; Arborescences; Branchings; J. nB4-249, 233-240(1967).

Combinatorics; Indeterminates; Linear algebra; Matroids;

Systems of distinct representatives; Term rank; Algorithms;

J. IIB 4-250. 241-245 (1967).

Combinatorics; Mathematics; Matroids; Networks; Operations

research; Optimization; Algorithms; 9314.

Combinatorics; Set theory; Classification design; J. 71B 1-193. 21-22 (1967).

Combustibility; Endurance; Fire; Flammability tests; Paints; 9776.

Commodity transfer; Cryogenic; Cryogenic processes; Density;

Flowmeters; Mass flow; Mass flowmeters; Performance

results; Propellant management; Substitute fluid; Volume

flow; Accuracy; Calibration; 9428.

Commutator; Matrix; Orthogonal; Quaternions; Skew-symmetric; Regular representation; J. 71B 1-196.43-46 (1967).

Commuting matrices; Group representations; Normal matrices;

Schur's lemma; Simultaneous triangularization and

diagonalization;y. 71B 2&3-201, 69-71 (1967).

Comparison; Effective aperture; Electromagnetic horns; Gain;

Measurement; Microwave; Mismatch errors; Rayleigh

distance; Standard gain horns; Antennas; Calibration; TN351

Comparison; Graphite; H^-s,,,; Absorbed dose; Calorimeter;

Cavity ionization chamber; Cobalt-60 gamma rays; J. 71C

1-440. 19-27(1967).

Comparison calibration; Frequency range; Shaker; Vibration;

Accelerometer; Calibration; 9306.

Compensated GaAs; Epitaxial GaAs lasers; Fermi levels; Radiative recombination; 9518.

Compilation; Copper; Copper alloys; Low temperature;

Mechanical properties; Mono. 101

Compilation; Cryogenic; Infrared; Metals; Reflectance; TN348.

Compilation of data; Composition; Critical field; Critical temperature; Crystallographic data; Low temperature; Superconductivity; Bibliography; TN408.

Complex analysis; Dirichlet problem; Discrete analytic funcfions; Analytic functions; 7. 71B 2&3-205, 105-1 10 ( 1967).

Complex ion; Enthalpy determination; KCl-CdClj system; Molten salts; Calorimeter; Calorimetry; 9485.

Complex laboratory-scale model; Computer; Coordinate

systems; Digital computer; Number of points; Calibration

points; 9202.

Complex refractive index; Ellipsometry; Mercury; Optical constants; Refractive index; Surface films; 9509.

Component combination; Phrase structure grammar; Linguistics; Frame embedding; Two-dimensional languages;

Chinese characters; Grammar; Generative grammar; TN296.

Composition; Critical field; Critical temperature; Crystallographic data; Low temperature; Superconductivity; Bibliography; Compilation of data; TN408.

Composition; Growth rate; Kinetics; Multicomponent;

Steady-state; 9472.

Composition; Price list; Property of material; Purity of material; Standard reference materials; Standards; Analysis; Catalog;

Certificate; Characterization; M260. 1 967 Edition.

Compressibility; Cylinder distortion; High pressure; Nickel;

Tellurium; Ultrasonics; J. 71C 1-439. 11-17(1967).

Compressibility; Elastic constants; Elastic compliances; Single

crystal; Velocity of sound; Uranium dioxide; 91 73. Compressibility; Heat of sublimation; Molecules; Potential

functions; Empirical and semi-empirical; Transport properties; Virial coefficients; Atoms; TN246.

Compressible flow; Flow comparison; Fluid flow; Incompressible flow; Mass flow; Pressure drop; TN356.

Compressible flow; Flowmeter; Gas meter; Heat transfer; Laminar flow; Meter calibration; 9390.

Compton wavelength of the electron; Positronium; Quenching;

Annihilation radiation;^. 71A 5-464, 347-353 (1967).

Computational methods; Emissivity; Emittance measurements;

Radiant heat transfer; Reflectance measurements; Thermal

radiation; 9303.

Computer; Coordinate systems; Digital computer; Number of

points; Calibration points; Complex laboratory-scale model;

9202.

Computer; Electrodeposition; Electron back scatter; Electron

probe microanalyzer; Emission spectroscopy; Laser probe;

Mass spectroscopy; Photographic photometry; Plasma jet;

Preconcentration; Pulse height analyzer; Spectrochemical

analysis; Spectroscopy; TN401.

Computerized typesetting; Graphic arts; Photocomposition;

Printing and publication; Automated type composition; Mono.

99. Computers; Counting rooms; Feedback analysis; Optimization

of variables 10 MW nuclear reactor; Pneumatic tubes; Radiochemical laboratories; 14 MeV neutron generator; 100

MeV-40 KW LIN AC; Clean room; 9154.

Computers; Cross sections; Detection limits for analysis; Flux

monitors; Mossbauer instrumentation; Mossbauer spectroscopy; NBS Linac; Nickel-61; PARLORS program for Mossbauer spectra; Photoneutron reaction; Solid state detectors; TN421.

Computers; Hayward notation; Information retrieval; Linear

notation; Structures; Substructure searches; Chemical; 9482.

Concentric loading; Circular plates; Deflection; Elasticity; Experimental; Flexure; Point supports; Simplified approximate

solutions; Thin plates; Bassali's theory; J. 70C 4-254, 227-244

(1966).

Concentric loading; Design; Elasticity; Experiment; Maximum

stresses; Symmetrical bending; Symmetrically distributed

load; Theory; Circular plates; 7. 71C 1-438, 1-10 (1967).

Concrete; Corrosion in concrete; Corrosion in plaster; Dissimilar metals; Galvanic corrosion; Gypsum plaster; Aluminum conduit; Calcium chloride; 9497.

Concrete construction, supports; Reinforced concrete construction; Reinforcement bars; Wire bar supports; Bars, concrete

reinforcement; PS7-66.

Conductance; Conductivity; Dielectric; Measurements; Resistance; Resistivity; 9198.

Conductance; Deuterium oxide; Dissociation processes; Elec- trochemistry; Electrolytes; Emf; Indicators; Isopiestic; Vapor

pressure; Methanol-water solvents; Thermodynamics; Acidity; Analytical chemistry; TN400.

Conductance; Dielectric conductance; Conductivity; Volume

conductivity; Insulation conductance; Resistance; Dielectric

resistance; Resistivity; Dielectric constant; Permittivity; Dissipation factor; Loss index; Dielectric strength; Arc re- sistance; 9174.

Conductance; Diffusion; Electrodes; Electrolysis; Glass; Molten salts; 9408.

Conductance measurements; Electrochemical analysis; Elec- trochemistry of solutions; Glass electrodes; Medium effects; PH measurements; Acidity; Analysis; TN423.

Conductance pressure dividers; Hot cathode vacuum gages;

Ionization gages; Vacuum gage calibration systems; Vacuum

gages; Volumetric pressure dividers; Bayard-Alpert gages;

Cold cathode vacuum gages; TN298.

Conductive; Flooring; Installation; Standards; Adhesive industrial; Characteristics; 9777.

Conductivity; Crystal growth; Sodium; Alkali halides; Aqueous;

Chloride; Color centers; 9182.

138
Conductivity; Crystals; Defect pairs; Dielectric relaxation; Electrode capacitance; Surface layers; CaF2; J. 71A 5-465,

355-362(1967).

Conductivity; Dielectric; Measurements; Resistance; Resistivity; Conductance; 9198.

Conductivity; Electrical conductivity; Electrical resistivity;

Heat conductivity; Lorenz function; Platinum; Reference

material; Resistivity; Standard; Thermal conductivity; J. 71C

4-258, 255-284(1967).

Conductivity; Electrical conductivity; Electrical resistivity;

Heat conductivity; Heat transfer; Iron; Lorenz function; Resistivity; Thermal conductivity; Armco iron; J. 71C 4-259,

285-291 (1967).

Conductivity; Volume conductivity; Insulation conductance;

Resistance; Dielectric resistance; Resistivity; Dielectric constant; Permittivity; Dissipation factor; Loss index; Dielectric

strength; Arc resistance; Tracking; Measurements; Electrical

testing; 9174.

Cone; Convex hull; Face; Frame; Lineality space; Linear pro- gramming; Algorithm; 7. 71B 1-189, 1-7(1967).

Cone-plate viscometer; Crystallinity; Flow properties; Kaolins;

Surface area; Cation exchange capacity; 9491

Conference, National; Weights and measures; M290.

Conference proceedings; Government; Operations research; Systems analysis; M294.

Conferences, 1966 Standards Laboratory; Foreign standards

laboratories; Laboratory management; Measurements and

standards; Measurement system; National Conference of

Standards Laboratories; Proceedings, 1966 Standards

Laboratory Conference; M291

Confidentiality audits; Disaggregation; Disclosure criteria; Federal statistical system; Inherent computability; Matching;

Probability master samples; Propagation of error computations; Statistical standards; Automatic data processing equip- ment; 9247.

Configurations 4d"+4d"'^ 5s, energy levels; Interaction parameters; Palladium group; Theoretical; Third spectra; J. 70A

5-415,435-445 (1966).

Configurations 5cP6s and 5cP6p\ Au ill; Calculated transition strengths;^. 71 A 2-446, 149-156 (1967).

Conformational analysis; Carbon- 14- and tritium-labeled car- bohydrates; Large-scale paper chromatography; Phenylhydrazono-phenylazo tautomerism; Cyclopentitols and re- lated substances; Unsaturated alditols; Infrared spectra of

acylamido derivatives; TN405.

Congruence groups; Genus; Modular group; 9164.

Congruence groups; Modular group; Normal subgroups;

Parabolic classes; 9375.

Connector; Electromotive force; Oil baths; Standard ceils; Thermoelectric; TN353.

Consistency; Frequency; Superposition; Crystal; Structure; Patterson; Vector; Symmetry;^. 70X4-407, 319-321(1966).

Console; Electrical; Measurement; Ratio; Standards; Voltage;

Volt box; Calibration; y. IOC 3-229, 1 73-1 85 (1966).

Console; High measurement accuracies; Human engineering;

Volt boxes; Calibration console; 9184.

Constant rate of strain; Creep; Elastic fluid; Nonlinear behavior;

Polyisobutylene; Recovery; Stress; Relaxation; BKZ theory;

J. 70A 6-423, 525-532 (1966). Constants; Crystal; Lattice; Measurements; Powder-patterns;

Reference-intensities; Standard; Structure; X-ray diffraction; Mono. 25, Section 5. Constants; Spectral; Molecular; Vibrational; Frequencies; Data; Tables; Force; NSRDS-NBS6.

Continuity of coating; Corrosion resistance; High-voltage test- ing; Porcelain enamel; Porcelain enamel defects; Bubble

structure; 9223.

Continuous; Deexcitation; He; He2; Metastable; Radiative;

Spectra; Theory; Vacuum-ultraviolet; Atomic; Collisions; 9367.

Continuous function; Fourier series; Piecewise; Smoothing; J. 1\C 2-248, 93-100(1967).

Continuum; Crystal; Defect; Dislocation; Displacement; In- teraction; Isotropic; Strain; Stress; 9445.

Continuum; Crystal; Defect; Dislocation; Energy; Interaction;

Isotropic; Straight; 9446.

Contractions; Functional analysis; Metric spaces; Topology; J. 718 2&3-202, 73-76 (1967). Contrast; Crispening; Lightness; Munsell value; Reflectance;

9410.

Contrast; Crispening; Opponent color theory; Surround color; Three components color theory; Chromatic induction; Color;

9411.

Contrast; Modulation; Notation; Optical density; Propagance;

Reflectance; Reflectance factor; Symbols; Transmittance;

Transmittance factor; Absorptance; 9373.

Control charts; Experiment design; Saturated standard cells; Standard cells calibration; Statistics; Voltage standard;

TN430.

Controlled-gradient vacuum furnace; Elevated temperatures;

Optical comparator; Thermal expansion; J. 71C 2-247, 85-91

(1967).

Controlled potential coulometric; Molybdenum; Homogeneous

precipitation; Aluminum; Beryllium; Thermoanalytical stan- dards; Tricalcium silicate; Spectrophotometry; Antimony;

High precision determination of nickel; Simultaneous deter- mination copper; Cobalt; TN402.

Convergence; Multidimensional; Polynomials; Functions; Variables; Hermite-Fejer; Bernstein; Chebyshev; Approximations; 7. 70B 3-182, 211-218 (1966).

Convergence temperature; Melting temperatures; Methyl sur- faces; w-paraffins; Polyethylene; Thermodynamic properties;

J. 70A 6-421, 481-486 (1966).

Conversion factors; Metric system; International system (SI); H102.

Conversion tables; International System (SI); Metric System;

U. S. Customary System; Weights and measures; Weights and

measures abbreviations; Weights and measures systems;

Weights and measures units; M286.

Convex hull; Face; Frame; Lineality space; Linear pro- gramming; Algorithm; Cone;/. 71B 1-189, 1-7 (1967).

Coordinate systems; Digital computer; Number of points;

Calibration points; Complex laboratory-scale model; Computer; 9202.

Coordination; Hydrated salts; Hydrates; Hydrogen-bonding;

Neutron scattering; Vibration spectra; Water librations; Cold

neutrons; 9505.

Copolymer; Ethylene-propylene; Linear polyethylene; Stress

relaxation; Thermolytic chain scission; 9264.

Copper (II) acetate monohydrate; Polarized electronic absorption spectrum; Tentative assignment based on selection rules; Bi-nuclear complex; 9155.

Copper; Copper alloys; Low temperature; Mechanical properties; Compilation; Mono. 101. Copper; Germanium; Ritz; Silicon; Spectrum; Standards; Ultraviolet; Vacuum; Wavelengths; Carbon; 9338.

Copper alloys; Low temperature; Mechanical properties; Compilation; Copper; Mono. 101

Copper doped tetrachlorozincate; E.p.r. analysis; Jahn-Teller

effect; Polarized ultraviolet spectrum; Tetrachlorocuprate ion; 9191.

Core-mantle coupling; Decade fluctuations; Dynamo theory;

Earth's core; Geomagnetism; Rotation of the earth; Westward

drift; TN358.

Coriolis constant; Force field; Infrared; Osmium tetraoxide;

Vibration-rotation; 9349.

Coriolis force; Force fields; High resolution; Infrared; v-u Vibration-rotation; ^3; li\ Band contours; BF3; 9268.

Corrections to analysis of Au iii; Gold; Spectrum of Au iii; Third spectrum; J. 70A 6-418, 465-466 (1966).

139
Correlated estimators; Enthalpy adjustments; Heat of vaporization; High temperature chemistry; Overestimation of standard

deviation; Second law heat; Slope estimators; Third law heat; Vapor pressure; y. 70A 6-424, 533-539, (1966).

Correlation; Dilute gases; Nitrogen; Oxygen; Transport coeffi- cients; Lennard-Jones; Kihara; Exp: 6; Morse potential functions; Eucken correction; TN350.

Correlation; End-to-end length; Fokker-Planck equation;

Polymer chain dynamics; Radius of gyration; Relaxation;

Statistical-bead model; Autocorrelation; 9515.

Correlation; Equilibrium properties; Experimental data; Inter- molecular potential function; Theory; Transport properties;

TN360.

Correlation; Lens design; Resolving power; 9407.

Correlation factors; Diffusion; Dilute alloys; Impurities; Jump

frequencies; Solute atoms; Vacancies; 9464.

Correlation radiometer; Differential time delay; Gain fluctuations; Imperfect multiplier; Noise comparison; Nonidentical

amplifiers; Sine-wave comparison signal; J. 71C 2-253,

153-170(1967).

Correlafions; M-6; Kihara; Exp: 6, Morse; Potential funcfions;

Dilute gases; Neon; Krypton; Xenon; Transport coefficients; TN352.

Corresponding states; Cryogenic gases; Generalized inversion curve; Joule-Thomson coefficient; Mixtures; 9456.

Corrosion; Corrosion currents; Electroplating; Galvanic corrosion; Pitting; Pitting corrosion; 9490.

Corrosion; Cracking; Stainless steels; Steels; Stress corrosion;

Atmospheric corrosion tests; Chemical attack; Cold working;

9479.

Corrosion currents; Electroplating; Galvanic corrosion; Pitting:

Pitting corrosion; Corrosion; 9490.

Corrosion in concrete; Corrosion in plaster; Dissimilar metals; Galvanic corrosion; Gypsum plaster; Aluminum conduit; Cal- cium chloride; Concrete; 9497.

Corrosion in plaster; Dissimilar metals; Galvanic corrosion;

Gypsum plaster; Aluminum conduit; Calcium chloride; Concrete; Corrosion in concrete; 9497.

Corrosion rates, Ni-Fe alloys; Polarization techniques; Polarization rate; Polarization resistance; Polarization circuits; Ni-Fe

pitting; J. 70C 3-230, 187-194(1966).

Corrosion resistance; High-voltage testing; Porcelain enamel;

Porcelain enamel defects; Bubble structure: Continuity of

coating; 9223.

Corundum; Elastic constants; Shear modulus; Young's modulus; Aluminum oxide; y. n\4-403, 277-280 (1966).

Coulomb approximation; Electron density; Electron temperature; Equivalent electrons; Local thermal equilibrium; Oscilla- tor strength (f-value); Optical depth; Oxygen ir; Plasma;

T-tube; Carbon II ;9iSS.

Coulometric analysis; Gas analysis; Mass spectrometric gas

analysis; Microchemical analysis; Polarographic analysis;

Standard reference materials, analysis of; Stoichiometry;

Atomic weights; TN403.

Coulometric analysis; Gas analysis; Mass spectrometric gas

analysis; Microchemical analysis; Null-point potentiometry;

Polarographic analysis; Standard reference materials, analysis; TN425.

Counting rooms; Feedback analysis; Optimization of variables 10 MW nuclear reactor; Pneumatic tubes; Radiochemical

laboratories; 14 MeV neutron generator; 100 MeV-40 KW

LINAC; Clean room; Computers; 9154.

Coupled-channel calculation; Nuclear alignment; Nuclear defor- mation; Optical model; Van de Graaff; 14 MeV neutrons;

'"^Ho; Black nucleus model; Cryogenic target; 9362.

Coupled harmonic oscillators; Momentum autocorrelation function: Statistical dynamics: Statistical mechanics: 9389.

Coupler; Directional; Reflectometer; RE power; Coaxial; 9333.

Coupling agent; Denture; Plastic; Porcelain adhesion; Resin;

Silane; Teeth; Bonding; 9494.

Cracking; Stainless steels; Steels; Stress corrosion; Atmospheric corrosion tests; Chemical attack; Cold working; Corrosion;

9479.

Creep; Elastic fluid; Nonlinear behavior; Polyisobutylene;

Recovery; Stress; Relaxation; BKZ theory; Constant rate of

strain; y. 70A 6-423, 525-532 (1966).

Creep: Nickel alloys; Duranickel; Nickel-aluminum

precipitates: High temperatures; Deformafion; Cold-drawing;

J. 70C 3-231, 195-205 (1966).

Creep; Primary creep; Shear; Shell: Stress analysis; Thin wall; Torsion; Tube; 7. 71C 3-256. 209-225 (1967).

Crispening; Lightness; Munsell value; Reflectance; Contrast; 9410.

Crispening; Opponent color theory; Surround color; Three components color theory; Chromatic induction; Color; Contrast; 9411.

Critical data; Data evaluation; Errors; Chemical literature; 9309.

Critical energy; Generating function; Lattice model; Partition function; Random walk; Adsorption; Chain polymer; J. 70B

4-185,237-247 (1966).

Critical field; Critical temperature; Crystallographic data; Low

temperature; Superconductivity; Bibliography; Compilation

of data; Composition: TN408.

Critical fields: Heat capacity; Magnetization curves; Semiconducting SrTiOs; Superconducting SrTiOs; 9269.

Critical nucleus; Field-electron emission microscopy;

Heterogeneous nucleation: Vapor deposition; 9483.

Critical phenomena; Critical point; Second order phase transi- tion: Singularities; Pade approximate fluctuations; Opalescence: X-transifions; M273.

Critical point; Second order phase transition; Singularities; Pade

approximate fluctuations; Opalescence: X-transitions; Critical phenomena: M273.

Critical temperature; Crystallographic data; Low temperature;

Superconductivity; Bibliography; Compilation of data; Composition; Critical field; TN408.

Cross-linking; Dextran; Dextran triacetate; Gamma irradiation; Polymer degradation; Postirradiative decay; Aqueous solution; 7. 71A 1-433, 25-31 (1967).

Cross section; Deformed nuclei; Giant quadrupole resonances; Photons; Absorption: Collective model; 9352.

Cross section; Differential cross section: ^H; ^He; Photodisintegration; Zero-range: 9341

Cross section; Electron affinity; Molecular structure; Negative

hydroxyl ion; OD" ions; OH' ions; Photodetachment; 9285.

Cross section; Emission spectrum; Energy transfer; Experimental; Gas; Oxygen atom; Oxidation; Population distribution; Rotation; Acetylene; CH; Chemiluminescence; 9288.

Cross-section; Photoneutron; Activation curve; 9215.

Cross sections; Detection limits for analysis; Flux monitors;

Mossbauer instrumentation; Mossbauer spectroscopy; NBS

Linac; Nickel-61; PARLORS program for Mossbauer spectra; Photoneutron reaction; Solid state detectors; Standard

reference materials; TN421

Cryodeposit; Cryodeposit surface temperature; Cryopumping;

Cryopumping air at 20 °K in the transition pressure regime;

Geysering; Heat transfer to air condensing at 20 °K: Air col- lector; Air condensation; Air sampling; 9463.

Cryodeposit surface temperature; Cryopumping: Cryopumping

air at 20 °K in the transition pressure regime: Geysering; Heat

transfer to air condensing at 20 °K; Air collector; Air condensation; Air sampling: Air solidification at 20 °K; 9463.

Cryogenic; Cryogenic processes; Density; Flowmeters: Mass

flow; Mass flowmeters: Performance results; Propellant

management; Substitute fluid; Volume flow; Accuracy;

Calibration; Commodity transfer; 9428.

Cryogenic; Infrared; Metals; Reflectance; Compilation; TN348.

140
Cryogenic data center; Cryogenic fluids; Low temperature properties of materials; NBS cryogenic data center; Thermodynamic and transport properties; 9255.

Cryogenic fluids; Low temperature properties of materials; NBS

cryogenic data center; Thermodynamic and transport properties; Cryogenic data center; 9255.

Cryogenic gases; Generalized inversion curve; Joule-Thomson

coefficient; Mixtures; Corresponding states; 9456.

Cryogenic magnet; Energy storage; Induction coil; Liquid

hydrogen; Aluminum; 9429.

Cryogenic noise source measurements; Microwave; Noise

source measurements; Radiometer; 9150.

Cryogenic processes; Density; Flowmeters; Mass flow; Mass

flowmeters; Performance results; Propellant management;

Substitute fluid; Volume flow; Accuracy; Calibration; Commodity transfer; Cryogenic; 9428.

Cryogenics; Dilution refrigerator; Enthalpy; Entropy;

Fermi-Dirac gas; Helium-3; Helium-4; Liquid; Mixtures;

Osmotic pressure; Quantum fluid; Specific heat; Thermodynamic properties; TN362.

Cryogenics; Hydrogen; Instrument; Instrumentation; Liquefier;

Liquid hydrogen; Measurement; Nuclear spin relaxation time;

Ortho-para; Relaxation time; Ti; Analyzer; 9486.

Cryogenics; Refrigeration; Claude; TN354.

Cryogenic target: Coupled-channel calculation; Nuclear align- ment; Nuclear deformation; Optical model; Van de Graaff; 14 MeV neutrons; '*"Ho; Black nucleus model; 9362.

Cryopumping; Cryopumping air at 20 °K in the transition pres- sure regime; Geysering; Heat transfer to air condensing at 20

°K; Air collector; Air condensation: Air sampling; Air solidifi- cation at 20 °K; Cryodeposit: 9463.

Cryopumping air at 20 °K in the transition pressure regime;

Geysering; Heat transfer to air condensing at 20 °K; Air col- lector; Air condensation; Air sampling; Air solidification at 20

°K; Cryodeposit; Cryodeposit surface temperature; 9463.

Crystal; Defect: Dislocation; Displacement; Interaction;

Isotropic; Strain; Stress; Continuum: 9445.

Crystal; Defect; Dislocation: Energy; Interaction: Isotropic;

Straight: Continuum; 9446.

Crystal; Diethyl phthalate; Glass transformation; Heat capacity

calorimetry; Molecular configurational state: Normal and su- percooled liquid; Quenched glass; Residual (configurational)

entropy; Thermodynamic properties; J. 71A 4-461 , 293-305

(1967).

Crystal: Lattice; Measurements; Powder-patterns;

Reference-intensities; Standard; Structure; X-ray diffraction; Constants; Mono. 25, Section 5. Crystal; Structure: Patterson; Vector; Symmetry; Consistency:

Frequency: Superposifion; J. 70A 4-407, 319-321 (1966).

Crystal; X-ray; Barium tetragermanate; Structure; Benitoite; J. 70X5-411,385-391 (1966).

Crystal characterization: Crystalline materials: Crystal growth:

TN293.

Crystal growth; Crystal characterization; Crystalline materials; TN293.

Crystal growth; Crystallization kinetics: Homogeneous nucleation; Interfacial energy; Nucleation; Polychlorotrifluoroethylene; Polyethylene: Polymers; Surface free energy; Chain

folding; 9454.

Crystal growth; Crystals; Vapor phase diffusion; Calcite; 9320.

Crystal growth; Dendrite; Electrocrystallization; Elec- trodeposited crystals; Electrodeposited dendrites: Silver; 9422.

Crystal growth; Diffusion; Heat flow; Interface: Kinetics;

Morphology; Sphere; Stability; 9439.

Crystal growth; Fermi surface; Orientation; Potassium; Spark

cutting; Zone refining; y.71A2-44i, 127-132 (1967).

Crystal growth; Fused salts; Magnetic fields; Molten metals; Solute distribution; Thermal convection: 9513.

Crystal growth; Kinetics; Multicomponent systems; ^-paraffins;

Pair distributions: Phase diagrams: J. 71A 4-457, 245-259

(1967).

Crystal growth; Kinetics; Multicomponent systems: Surface

free-energy; Chain-folded crystals; J. 71A 4-458, 261-275

(1967).

Crystal growth: Lithium sulfate: Single crystals; Temperature

gradient zone melting; Traveling solvent; Calcium molybdate;

9496.

Crystal growth; Sodium; Alkali halides; Aqueous; Chloride;

Color centers; Conductivity; 9182.

Crystalline materials: Crystal growth; Crystal characterization;

TN293.

Crystallinity: Flow properties; Kaolins; Surface area; Cation

exchange capacity: Cone-plate viscometer; 9491

Crystallization kinetics; Homogeneous nucleation: Interfacial energy; Nucleation; Polychlorotrifluoroethylene;

Polyethylene; Polymers; Surface free energy; Chain folding:

Crystal growth: 9454.

Crystallization of rubber; Elastomers; Polybutadiene;

Polyethylene: Polyisobutylene; Rubber; Specific heat; Butadiene-acrylonitrile copolymer; Butadiene-styrene

copolymers: 9520.

Crystallized rubber; Heating rate; Melting range; Melting temperature; Oriented: Partial melting: Recrystallization;

Rubber: Slow melting; Stark rubber; Crystal size; J. 71A

3-455,225-229(1967).

Crystallographic data; Low temperature: Superconductivity;

Bibliography; Compilation of data; Composition; Critical

field: Critical temperature; TN408.

Crystallographic groups; Interplanar angles; Physical properties: Scheelite structure: Single crystal: X-ray back-reflection;

Calcium molybdate: Crystal orientation; J. 70A 5-410,

379-384(1966).

Crystal orientation; Crystallographic groups; Interplanar angles;

Physical properties; Scheelite structure; Single crystal; X-ray

back-reflection; Calcium molybdate: J. 70A 5-410. 379-384

(1966).

Crystals; Defect pairs; Dielectric relaxation; Electrode

capacitance; Surface layers: CaF-,; Conductivity; J. 71A

5-465,355-362 (1967).

Crystals; Phosphorescence: Triplet states; 91 78. Crystals: Vapor phase diffusion; Calcite: Crystal growth; 9320.

Crystal size; Crystallized rubber; Heating rate; Melting range;

Melting temperature; Oriented; Partial melting; Recrystallization; Rubber; Slow melting; Stark rubber: J. 71A 3-455,

225-229(1967).

Crystal spectrum; Polarized spectrum; Bis(acetylacetonato)

copper (II): Bis(3-phenyl-2.4-pentanedionato) copper (II); 9426.

Crystal structure; Dichlorod ,10-phenanthroline)zinc: Molecular structure; Tetrahedral; 9499.

Crystal structure: Differential chemical shift; Mossbauer spec- troscopy: Quadrupole splitting: Sodium nitroprusside; Stan- dardization; 9238.

Crystal structure; Niobium pentoxide; Phase equilibria; System;

Tungsten trioxide:y. 70A 4-404, 281-303 (1966).

Cr20,)-Ir02 system; Dissociation; Phase relations: Platinum

metal oxides; Solid solution; 9480.

CsCt; CaF-.; ZnS; Electric fields; Ionic crystals; Lattice sums;

Point defects; Polarization; NaCI; J. 71A 1-428. 1-2 (1967).

Cu, Se, Al, V in irons and steels; Homogeneity tesfing; Pneumatic rabbit sensor; Mossbauer spectroscopy; Tin standard

for chemical shift; PARLORS program for Mossbauer spectra; Mossbauer instrumentation; Mossbauer laboratories; TN404.

Cu; Double electron photoexcitation; Ni; Photoemission; Soft X-ray spectrum; Ag; 9442.

Culverts; Hydraulics; Inlets; Model tests; 9243.

141
Current balance; National electrical units; Nonmagnetic facility; Pellat dynamometer; Proton precession frequency; Absolute

ampere determination; Calculable inductor; 9325.

Curtis approximation; Dittmar-Neumann approximation; Mean

stay time; Stefan problem; Surface concentration; Surface

self-diffusion; Whisker growth; 9508.

Cut-sets; Graph theory; Network flows; Mathematics; Segs;

Basic cut-sets; J. im 4-242, 183-186 (1967).

Cyanide groups; Initiation; Isolation; Naphthylidiene ring;

Polyacrylonitrile; Propagation; 9489.

Cyanogen; Infrared; Molecular structure; Spectra; Bond

distances; 9183.

Cyanogen azide; Force constants; Infrared spectrum; NCN free

radical; Thermodynamic properties; Ultraviolet photolysis;

Carbon atom production; Carbon atom reactions; 9369.

Cycles; Jacobi matrices; Triple diagonal matrices; Chains;

J. 71B 4-246, 215-224 (1967).

Cyclohexane; Ethylbenzene; Extinction coefficient; Polymer;

Polystyrene; Solvent effects; Ultraviolet absorption; Carbon

tetrachloride; J. 71A2-449, 169-175 (1967).

Cyclopentitols and related substances; Unsaturated alditols; In- frared spectra of acylamido derivatives; Carbohydrate

reference materials; Metallo-organic standard reference

materials; Air-pollution studies; Oxidation of polycyclic aro- matic hydrocarbons; TN405.

Cylinder distortion; High pressure; Nickel; Tellurium; Ultrasonics; Compressibility; y.71C 1-439, 11-17 (1967).

Czerny-Turner; Spectrograph; Spectrometer; Astigmatism;

9401.

D

Data; Force constants; Infrared spectra; Modes of vibration; Molecular vibrational frequencies; Molecular spectra; Raman

spectra; NSRDS-NBSll.

Data; Gas; Rate constants; Reactions; Tables; Activation energies; Arrhenius equation; Bimolecular; Chemical kinetics; NSRDS-NBS9.

Data; Tables; Force; Constants; Spectral; Molecular; Vibrational; Frequencies; NSRDS-NBS6.

Data compilation; Emission; Energy levels; X-ray wavelength;

Absorption; Atomic; NSRDS-NBS14.

Data evaluation; Errors; Chemical literature; Critical data; 9309.

Data, geomagnetic and solar; Geomagnetic solar data; Solar

data, geomagnetic; 9181.

Data index; Elements; Isotopes; Nuclear physics; Photonuclear

reactions; Bibliography; M277, Supplement 1

Data processing; Systems analysis; Transportation planning;

Urban transportation; 9474.

DC-amplifiers; Filter; Pickup; 9241

Decade fluctuations; Dynamo theory; Earth's core; Geomagnetism; Rotation of the earth; Westward drift; Core-mantle

coupling; TN358.

Decay; Decay width; Meson; Resonances; Spurious; Symmetry

breaking; U( 1 2) theory; Baryon; Branching ratio; 9166.

Decay; Dissociation; High pressure rate constant; Kinetics;

Lifetime; Mass spectra; Metastable molecules; Predissociation; Quantum mechanics; Resonance scattering; Theoretical;

Unimolecular dissociation; Activated complex; Activated

molecules; 9366.

Decay: Flash photolysis; Lifetime; Matrix isolation; Primary

process; 9396.

Decay width; Meson; Resonances; Spurious; Symmetry breaking; U( 12) theory; Baryon; Branching ratio; Decay; 9166.

Decay widths; Higher symmetry; SU(3); SU(6)it; Baryon

resonances; Classification; 9295.

Decision-making; Education; Operations research; Quantitative

analysis; Management; TN4I4.

Decomposition pressures; Sulfates; Thermodynamic functions;

NSRDS-NBS7.

Deexcitation; He; He2; Metastable; Radiative; Spectra; Theory;

Vacuum-ultraviolet; Atomic; Collisions; Continuous; 9367.

Defect; Dielectric relaxation; Mechanical relaxation; Polychlorotrifluoroethylene; Polyethylene; Polymer;

Semicrystalline; Vacancy; Annealing; Chain fold; Chain rotation; Chain twisting; 9462.

Defect; Dislocation; Displacement; Interaction; Isotropic;

Strain; Stress; Continuum; Crystal; 9445.

Defect; Dislocation; Energy; Interaction; Isotropic; Straight;

Continuum; Crystal; 9446.

Defect pairs; Dielectric relaxation; Electrode capacitance; Sur- face layers; CaFz; Conductivity; Crystals; J. 71A 5-465,

355-362(1967).

Deflection; Elasticity; Experimental; Flexure; Point supports:

Simplified approximate solutions; Thin plates; Bassali's theory: Concentric loading; Circular plates; J. 70C 4-234,

227-244(1966).

Deformation: Cold-drawing; Creep; Nickel alloys; Duranickel;

Nickel-aluminum precipitates; High temperatures; J. 70C

3-231, 195-205 (1966).

Deformation dipole model; Effective force constants; Isotopic

impurities; Local mode frequencies; Nearest-neighbor interaction; Substitutional impurity; U-centers; Alkali halide crystal;

Born-Mayer potential: 9354.

Deformed nuclei; Giant quadrupole resonances: Photons; Absorption; Collective model; Cross section; 9352.

Deformed nuclei; Giant resonance: Nuclear hydrodynamics;

Octupole deformation: Photon absorption: Quadrupole

resonance: 9296.

Deformed reinforcement: Review of bond literature: Bond in pullouts and beams: Bond strength: 9160.

Degenerate mode cavity; L-band cavity; Polycrystalline garnets;

Tensor permeability; 7. 71C 1-445, 69-75(1967).

Degradation: Gallium arsenide; Lasers: Light emission; Surface

effects: Tunnel diodes; 9468.

Degradation; Nonisothermal kinetics; Polymers; Pyrolysis;

Thermal decomposition; Thermogravimetry; Thermolysis:

Stability of polymers; J. 70A 6-422, 487-523 ( 1 966 ). Degradation: Polymerization: Pyrolysis; Thermal decomposition: Thermal volatilization: 1 ,2-dihydronaphthalene; 9218.

Delayed failure; High strength steel; Hydrogen diffusion; Hydrogen embrittlement; Internal initiation: Stress corrosion;

Boiling sodium chloride solution; 9478.

Delay line: Frequency stability: Gage; High pressure;

Self-excited pulse repetition; Temperature compensation: Ultrasonics: Velocity of sound; 9331

Dendrite; Electrocrystallization; Electrodeposited crystals;

Electrodeposited dendrites: Silver; Crystal growth; 9422.

Dense gases; Rigid disks: Rigid spheres; Thermal conductivity;

Transport coefficients; Triple collisions; Viscosity; 9399.

Dense gases; Rigid spheres: Thermal conductivity; Transport

properties: Triple collisions; Viscosity; 9400.

Dense plasma; Line broadening; Plasma diagnostic techniques;

Stark effect: 9195.

Density; Dielectric constant: Dilatometer; Function; High pres- sure; «-hexane; Pressure: Three-terminal electrode set: Clausius-Mossotti:y. 71X4-460, 287-292(1967).

Density: Double substitution weighing; Hydrostatic balance; Hydrostatic weighing: Silicon density: Substitution balance; Volumetric measurement; Water density; Water weighing: Air

density; Balance; Balance calibration; 7. 71C 179-198

(1967).

Density: Flowmeters; Mass flow; Mass flowmeters; Per- formance results; Propellant management; Substitute fluid: Volume flow; Accuracy; Calibration; Commodity transfer; Cryogenic; Cryogenic processes; 9428.

142
Density; Glass; Hydrostatic compression; Polarizability;

Refractive index; Annealing; 9510.

Density; Heat of vaporization; Hydrogen; Parahydrogen;

Specific heat; Thermodynamic function; 9246.

Density; Liquids; Pycnometer; 9360.

Dental; Filling materials; Hardening; Shrinkage; Strain; Stress; Tensile; Adhesion; Bonding; 9433.

Dental; Research; Amalgam; 9495.

Dental amalgam; Dentistry; Mercury-silver alloys; Packing

pressure; Particle size; Silver-tin alloys; Spherical alloy;

Spherical-alloy amalgam; Adaptability; Amalgams; 9448.

Dentistry; Mercury-silver alloys; Packing pressure; Particle

size; Silver-tin alloys; Spherical alloy; Spherical-alloy amalgam; Adaptability; Amalgams; Dental amalgam; 9448. Denture; Plastic; Porcelain adhesion; Resin; Silane; Teeth;

Bonding; Coupling agent; 9494.

Design; Elasticity; Experiment; Maximum stresses; Symmetrical bending; Symmetrically distributed load; Theory; Circular

plates; Concentric loading; 7. 71C 1-438, 1-10(1967).

Design; Expansion turbine; Gas bearings; Helium refrigeration;

Performance; 9800 RPS; 200 Watts (30 °K); 9151.

Desorption; Dissociation; Field emission microscopy; Kinetic; Nitric oxide; Surface; Surface diffusion; Tungsten; Work

function; Adsorption; Chemisorption; 9421

Detection limits for analysis; Flux monitors; Mossbauer instru- mentation; Mossbauer spectroscopy; NBS Linac; Nickel-61;

PARLORS program for Mossbauer spectra; Photoneutron

reaction; Solid state detectors; Standard reference materials; TN421.

Detector; Efficiency; Four-pi; Halpern; Neutron;

Photoneutron; Response; Yields; TN416.

Detector telescope; Large area detectors; Photonuclea- physics

apparatus; Scattering chamber; Semiconductor detectors; 9298.

Deterioration; Insulation; Radiative cooling; Roofing, built-up;

9172.

Deterioration insulation; Radiative cooling; Solar heating;

Built-up roofing; 9249.

Determination of activation energies; Preexponential factor;

Stability of polymers; Thermogravimetric analysis; Variation

of the activation energy; Calculation of kinetic parameters;

9192.

Deuterium isotope effects; D-fructose; D-glucose; Isotope ef- fects; Mechanism of mutarotation; Mutarotation;

Pyranose-furanose interconversions; Sugars in solution; Acid-base catalysis in D2O; J. 71A 2-445. 137-148 (1967).

Deuterium oxide; Dissociation processes; Electrochemistry:

Electrolytes; Emf; Indicators; Isopiestic; Vapor pressure;

Methanol-water solvents; Thermodynamics; Acidity; Analytical chemistry; Conductance; TN400.

Deuterium oxide; Dissociation constant; Heavy water; PD

scale; Acetic acid; Acidity in deuterium oxide; 91 70. Deuterium oxide; Dissociation constants; Emf; Ionization; Isotope effects; Thermodynamics; Weak electrolytes; Acetic

acid-J4; Acid-base; 9492.

Deuterium oxide; Heavy water; Ionization constant; Isotope ef- fects; 9440.

Developing countries; International standards; Role of govern- ment; Role of private enterprise; Technology; World trade; M284.

Development; Roofing membrane; Strength properties; BSS9.

Device, electroexplosive ordnance; Field, near-zone elec- tromagnetic; Hazards, electromagnetic radiation; Line, nonmetallic electrical transmission; Line, semiconducting plastic

transmission; Meter, electric field-strength; J. 71C 1-443,

51-57(1967).

Device, electro-explosive ordnance; Field, near-zone elec- tromagnetic; Hazards, electromagnetic radiation; Line,

non-metallic electrical transmission; Line, semi-conducting

plastic transmission; Meter, electric field-strength; Telemetry,

novel form of; TN345.

Device; Field; Hazards; Line; Meter; Telemetry; 9318.

Device reliability; Diodes; Failure mechanisms; Failure modes;

Second breakdown; Semiconductor devices; Thermal breakdown; Transistors; Bibliography; TN431.

Dextran; Dextran triacetate; Gamma irradiation; Polymer

degradation; Postirradiative decay; Aqueous solution; Cross-linking; y.71A 1-433, 25-31 (1967).

Dextran triacetate; Gamma irradiation; Polymer degradation;

Postirradiative decay; Aqueous solution; Cross-linking;

Dextran;y. 71A 1-433, 25-31 (1967).

D-fructose; D-glucose; Isotope effects; Mechanism of mutarotation; Mutarotation; Pyranose-furanose interconversions; Sugars in solution; Acid-base catalysis in D2O; Deuterium

isotope effects; y. 71A 2-445, 137-148 (1967).

D-glucose; Isotope effects; Mechanism of mutarotation; Mutarotation; Pyranose-furanose interconversions; Sugars in solution; Acid-base catalysis in D>0; Deuterium isotope ef- fects; D-fructose;y. 7!A 2-445, 137-148(1967).

AH; AS; Equilibria; Equilibrium concentration of monomer; atrideuteromethyl-;8,/3-dideuterostyrene; Lowering of steric repulsions; Polymeric anion; 9254.

Diameter ratio; Mixing effectiveness; Square-edged orifice; Temperature measurement; Temperature pattern; BSS12.

Diatomic molecule; Interference; Photoionization; Ultraviolet; 9293.

Diatomic spectrum; Electronic transition; Rotational analysis;

Vacuum-ultraviolet region; Absorption spectrum; CO; 9403.

Dichloro(l ,IO-phenanthroline)zinc; Molecular structure; Tetrahedral; Crystal structure; 9499.

Dicke; Microwave; Radiometer; Sensitivity; Switching; 7. 71C

2-252, 127-152(1967).

Dielectric; Measurements; Resistance; Resistivity; Conductance; Conductivity; 9198.

Dielectric conductance; Conductivity; Volume conductivity; In- sulation conductance; Resistance; Dielectric resistance; Resistivity; Dielectric constant; Permittivity; Dissipation factor; Loss index; Dielectric strength; Arc resistance; Tracking;

9174.

Dielectric constant; Dilatometer; Function; High pressure;

/7-hexane; Pressure; Three-terminal electrode set; Clausius-Mossotti; Density; 7. 71X4-460, 287-292 ( 1967).

Dielectric constant; Dissipation factor; Frequency; Fluorinated

ethylene-propylene; Humidity; Polycarbonate; Polyethylene;

Poly(l ,4-cyclohexylenedimethylene terephthalate); Polystyrene; Poly(tetrafluoroethylene); Time; J. 71C 2-251, 119-125

(1967).

Dielectric constant; Electric dipole moments; Gas phase;

Microwave; Microwave absorption; Molecular beam; Permittivity; Refractive index; Spectroscopy; NSRDS-NBSIO.

Dielectric constant; Lead molybdate; Single crystal; Calcium

molybdate; 9434.

Dielectric constant; Permittivity; Dissipation factor; Loss in- dex; Dielectric strength; Arc resistance; Tracking; Measurements; Electrical testing; Conductance; Dielectric con- ductance; Conductivity; Volume conductivity; Insulation con- ductance; Resistance; 9174.

Dielectric constants; Dielectric relaxation times; Dipole moments; 9242.

Dielectric polarizability; Dipole moment; Fluid parahydrogen;

Macroscopic polarizability; 9248.

Dielectric relaxation; Electrode capacitance; Surface layers;

CaF2; Conductivity; Crystals; Defect pairs; J. 71A 5-465,

355-362(1967).

Dielectric relaxation: Mechanical relaxation; Polychlorotrifluoroethylene; Polyethylene; Polymer; Semicrystalline; Vacancy;

Annealing; Chain fold; Chain rotation; Chain twisting;

Defect; 9462.

143
Dielectric relaxation times; Dipole moments; Dielectric constants; 9242.

Dielectric resistance; Resistivity; Dielectric constant; Permittivity; Dissipation factor; Loss index; Dielectric strength; Arc

resistance; Tracking; Measurements; Electrical testing; Conductance; Dielectric conductance; Conductivity; Volume conductivity; 9174.

Dielectric strength; Arc resistance; Tracking; Measurements;

Electrical testing; Conductance; Dielectric conductance; Conductivity; Volume conductivity; Insulation conductance; Resistance; Dielectric resistance; Resistivity; Dielectric constant; 9174.

Diethyl phthalate; Glass transformation; Heat capacity

calorimetry; Molecular configurational state; Normal and su- percooled liquid; Quenched glass; Residual (configurational)

entropy; Thermodynamic properties; Annealed glass; J. 71A

4-461, 293-305 (1967).

Difference equations; Error analysis; Miller algorithm; Recurrence methods; Special functions; Chebyshev series; J. 71B

2&3-206, 111-129(1967).

Difference equations; Error bounds; Miller algorithm; Recurrence relations; Special functions; Chebyshev series; J. 71B

4-238, 161-166(1967).

Difference sets; Incomplete block designs; Statistical experiment designs; Tournaments; Weighing designs; Calibration;

Calibration designs; Combinatorial analysis; J. 71B 4-237,

149-160(1967).

Differential chemical shift; Quadrupole splitting; Random error; Systematic error; Sodium nitroprusside; Iron compounds; Optical Mossbauer spectrometer; Tandem Mossbauer spec- trometer; Velocity calibration; Mossbauer; Spectroscopy;

Standard; M260-13.

Differential chemical shift; Mossbauer spectroscopy; Quadrupole splitting; Sodium nitroprusside; Standardization; Crystal

structure; 9238.

Differential cross section; ^H; '^He; Photodisintegration;

Zero-range; Cross section; 9341

Differential time delay; Gain fluctuations; Imperfect multiplier;

Noise comparison; Nonidentical amplifiers; Sine-wave comparison signal; Correlation radiometer; 7. 71C 2-253, 153-170

(1967).

Diffraction, potential; Piston radiator; Potential diffraction; Radiator, piston; Sound; Acoustics; 9319.

Diffraction; Diffractometer; Neutrons; Simultaneous;

Three-circle; X ray; 9524.

Diffractometer; Neutrons; Simultaneous; Three-circle; X ray; Diffraction; 9524.

Diffuse reflectance; Emissivity; Emittance; Flux averaging

devices; Infrared reflectance; Spectral reflectance; Spectral

emittance; Specular reflectance; Averaging spheres; TN415.

Diffusion; Dilute alloys; Impurities; Jump frequencies; Solute atoms; Vacancies; Correlation factors; 9464.

Diffusion; Electrodes; Electrolysis; Glass; Molten salts; Conductance; 9408.

Diffusion; Heat flow; Interface; Kinetics; Morphology; Sphere;

Stability; Crystal growth; 9439.

Diffusion; Liesegang rings; Periodic precipitation; M292.

Diffusion coefficient; Polymer; Solution; Theory; 9425.

Diffusion coefficients; Momentum correlation function; Statisti- cal mechanics; 9376.

Digital; Phasemeter; Logic circuit; Low frequency; Measurements; Phase;y.71C i-257, 227-238(1967).

Digital computer; Number of points; Calibration points; Complex laboratory-scale model; Computer; Coordinate systems;

9202.

Digital computers; Activation analysis; Standard reference

materials; Photo-neutron reactions; Flux monitors; Cu, Se,

Al, V in irons and steels; Homogeneity testing; Pneumatic

rabbit sensor; Mossbauer spectroscopy; Tin standard for chemical shift; TN404.

Digital computers; Flux monitors; High precision 14 MeV

neutron activation; Homogeneity testing; Instrumentation;

NBS Linac; NBS reactor; Photoneutron reactions; Self absorption corrections; Standard reference materials; Vanadium in irons and steels; Activation analysis; Biological;

Botanical samples; Carbon in sodium; Cockroft-Walton

generator; TN428.

Dilatometer; Function; High pressure; «-hexane; Pressure; Three-terminal electrode set; Clausius-Mossotti; Density;

Dielectric constant; 7. 71A 4-460, 287-292 (1967).

Dilute alloys; Impurities; Jump frequencies; Solute atoms;

Vacancies; Correlation factors; Diffusion; 9464.

Dilute gases; Neon; Krypton; Xenon; Transport coefficients; Correlations; M-6; Kihara; Exp: 6, Morse; Potential functions; TN352.

Dilute gases; Nitrogen; Oxygen; Transport coefficients; Lennard-Jones; Kihara; Exp: 6; Morse potential functions;

Eucken correction; Correlation; TN350.

Dilution refrigerator; Enthalpy; Entropy; Fermi-Dirac gas; Heli- um-3; Helium-4; Liquid; Mixtures; Osmotic pressure; Quantum fluid; Specific heat; Thermodynamic properties;

Cryogenics; TN362.

Dimensions; Natural markings; Slabs; Slate; Standard sizes; Thickness; Tolerances; Blackboards; PS2-66.

Dimensions; Nuts; Plastic; Plimbing equipment; Tanks; Valves;

Bowls; Brass; PS6-66.

Dimethoxyborane; Hydride; Nuclear magnetic resonance;

Proton; Bond lengths; Boron; Broad-line; 9450.

Dinitrogen trioxide; Equilibrium; Microwave spectrum; Structure; 9253.

Diodes; Failure mechanisms; Failure modes; Second break- down; Semiconductor devices; Thermal breakdown;

Transistors; Bibliography; Device reliability; TN431

Diophantine equations; Prouhet-Terry-Escott problem; Symmetric functions;^. 71B 4-241, 181-182 (1967).

Dipole moment; Dissociation energy; Electron affinity; Energy;

Field gradient; Magnetic constants; Molecular electronic

structure; Orbital energy; Polarizability; Quadrupole moment;

Spectroscopic constants; Ab initio electronic calculation; TN438.

Dipole moment; Fluid parahydrogen; Macroscopic polarizability; Dielectric polarizability; 9248.

Dipole moment; Free radical; Microwave spectrum; Structure; CF2; 9380.

Dipole moment; Microwave; Perchlorylfluoride; Quadrupole

coupling constant structure; 9204.

Dipole moments; Dielectric constants; Dielectric relaxation

times; 9242.

Direct-current; High-voltage; Ratio; Safety; Standards enclosure; Transformer; Voltage-divider; Voltmeter;

Alternating-current; Calibration; TN349.

Directional; Reflectometer; RF power; Coaxial; Coupler; 9333.

Direct replacement; High temperature; Mechanisms; Nonionic

or ionic coreactants; Nuclear fluorine; Pen- tafluorohalobenzenes;y. 70A 6-420, 473-480 (1966).

Dirichlet problem; Discrete analytic functions; Analytic functions; Complex analysis; y. 718 2&3-205, 105-110 (1967).

Disaccharide of d-lyxofuranose; Infrared absorption methods

for analysis of carbohydrates; Naturally occurring

monosaccharides and 6-deoxy sugars; Oxidation of polycyclic

aromatic hydrocarbons; Phenylhydrazono-phenylazo tau- tomerism; Quebrachitol, levo-inositol; TN427.

Disaggregation; Disclosure criteria; Federal statistical system;

Inherent computability; Matching; Probability master samples; Propagation of error computations; Statistical standards;

Automatic data processing equipment; Confidentiality audits; 9247.

144
Disclosure criteria: Federal statistical system; Inherent computability: Matching: Probability master samples: Propagation

of error computations: Statistical standards; Automatic data

processing equipment; Confidentiality audits; Disaggregation;

9247.

Discontinuous groups; Fourier expansion: //-groups; Automorphic forms; 7. 71B 4-239, 167-169 (1967).

Discrete analytic functions: Analytic functions: Complex analysis: Dirichiet problem: 7. 71B 2(6i-205, 105-110(1967).

Dislocation; Displacement; Interaction; Isotropic; Strain; Stress; Continuum; Crystal; Defect; 9445.

Dislocation; Energy; Interaction: Isotropic; Straight: Continuum; Crystal: Defect: 9446.

Dislocation nodes: Dislocations: Electron microscopy:

Silver-tin alloys; Stacking-fault energy; Stacking faults; 9502.

Dislocations; Electron microscopy; Grain boundaries: Impurities; Sapphire: Aluminium oxide: 9430.

Dislocations: Electron microscopy: Silver-tin alloy:

Stacking-fault energy: 9501.

Dislocations: Electron microscopy: Silver-tin alloys;

Stacking-fault energy: Stacking faults; Dislocation nodes;

9502.

Dislocations: Extrinsic faults: Silver-tin alloy; Stacking fault energy; 9459.

Dispersion; Distributions; Folding; Gaussian; Square; Trapezoidal; Triangular: 9398.

Dispersion: Fused silica; Infrared materials; Optical materials: Refractive index: 9190.

Dispersion; Hydromagnetic; Magnetosphere: Multicomponent;

Pc 1 micropulsations; Plasma; Polarization; Propagation: Alf- ven; TN342.

Displacement; Interaction; Isotropic; Strain: Stress; Continuum; Crystal; Defect: Dislocation: 9445.

Displays; Handbook; Human factors: Legibility: Psycholpgy;

Readability; Standards; Symbols; Type faces: Typography:

Visibility: Alphanumeric characters; M262-2.

Dissimilar metals; Galvanic corrosion: Gypsum plaster; Aluminum conduit: Calcium chloride: Concrete: Corrosion in concrete; Corrosion in plaster; 9497.

Dissipation factor; Frequency; Fluorinated ethylene-propylene:

Humidity; Polycarbonate; Polyethylene; Poly(l,4-cyclohexylenedimethylene terephthalate): Polystyrene: Poly(tetrafluoroethylene); Time; Reference specimens; J. 71C 2-251,

119-125(1967).

Dissipation factor; Loss index; Dielectric strength; Arc re- sistance; Tracking; Measurements: Electrical testing: Conductance: Dielectric conductance: Conductivity: Volume conductivity: Insulation conductance: Resistance; Dielectric re- sistance; Resistivity: 9174.

Dissociation: Electrolytes; Methanol: w-nitrophenol; Nonaqueous solvents: Phenols; Thermodynamics; J. 71A 1-430, 9-12

(1967).

Dissociation; Environmental effects: Melting point; Premelting;

AI2O3; J. 71A 4-463, 317-333 (1967).

Dissociation; Field emission microscopy: Kinetic; Nitric oxide;

Surface; Surface diffusion: Tungsten: Work function: Adsorption; Chemisorption; Desorption; 9421.

Dissociation: Fragment ions; Ionization; Mass spectrometer;

Molecule; NO2; NO.+ N2O+; Photoionization; Threshold; Ultraviolet; Vacuum; y. 71A 5-467, 371-378 (1967).

Dissociation; High pressure rate constant: Kinetics; Lifetime;

Mass spectra: Metastable molecules: Predissociation; Quantum mechanics; Resonance scattering: Theoretical:

Unimolecular dissociation; Activated complex; Activated

molecules; Activated state; 9366.

Dissociation; H2+: Electron: 9171.

Dissociation; Phase relations; Sn02-Ir02 system; Solid solution; Ti02l-Ir02 system:^. 71A 2-441, 119-123 (1967).

Dissociation; Phase relations; Platinum metal oxides; Solid solution; Cr203-Ir02 system; 9480.

Dissociation by heat; Entropy: Equilibrium; Heat of reaction: Oxygen pressures: Silver oxide; 9377.

Dissociation constant: Electrolytic dissociation: Methanolwater solvents; Thermodynamics; Acid-base equilibria:

Aminopyridine; 9493.

Dissociation constant; Emf measurements; Morpholine;

Morpholinium ion; Thermodynamic quantities: Bases: 9460.

Dissociation constant: Heavy water; PD scale: Acetic acid; Acidity in deuterium oxide; Deuterium oxide: 91 70. Dissociation constant: Methanol-water mixtures: Solvent ef- fects: Substituted phenols;7. 70A 6-427, 553-556 (1966).

Dissociation constant; Nitrophenols: Substituted phenols; J. 71X5-469.385-389(1967).

Dissociation constant; Substituted anilines; Substituted phenols;

J. 71X3-453, 213-218 (1967).

Dissociation constants: Emf; Ionization; Isotope effects: Thermodynamics; Weak electrolytes; Acetic acid-c/^; Acid-base;

Deuterium oxide: 9492.

Dissociation energy: Electron affinity; Energy: Field gradient;

Magnetic constants: Molecular electronic structure: Orbital

energy: Polarizability; Quadrupole moment: Spectroscopic

constants; Ab initio electronic calculation: Dipole moment;

TN438.

Dissociation processes; Electrochemistry; Electrolytes; Emf;

Indicators: Isopiestic; Vapor pressure: Methanol-water sol- vents; Thermodynamics; Acidity; Analytical chemistry: Conductance: Deuterium oxide; TN400.

Distance measurements: Earth-to-space microwave transmissions: Microwave transmissions: Phase; Tracking: At- mospheric: TN339.

Distillation; Neutron-activation; Tellurium: Chemical separation; 9169.

Distribution; End-to-end length: Lattice model; Monte Carlo:

Polymer chain dynamics: Relaxation; Simulation: 9514.

Distribution of intensity; Integral equation: Scattering cross section; Slit correction; Small-angle x-ray scattering: J. 70A

6-419,467-471 (1966).

Distributions: Folding: Gaussian: Square; Trapezoidal; Triangular: Dispersion: 9398.

Dithizone; Paint film; Fungicide; Latex: Mercury: Paint: Analysis: Colorimetric; 9431.

Dithizone: Silver; Sub-stoichiometric radioisotopic dilution analysis: Trace amounts: Cadmium; 9168.

Dittmar-Neumann approximation: Mean stay time; Stefan

problem; Surface concentration: Surface self-diffusion; Whisker growth; Curtis approximation: 9508.

Divergent x-ray beam; Instrument design; Kossel camera; Kossel method: X-ray instrumentation: J. 71C 4-262, 313-318

(1967).

Divergent x-ray beams: Kossel; Kossel sample preparation;

Photographic contrast; Transmission of x rays; X-ray diffrac- tion; 9527.

Documentation: Information retrieval; Publication; 9244.

Double electron photoexcitation; Ni; Photoemission; Soft X-ray

spectrum; Ag; Cu; 9442.

Double substitution weighing: Hydrostatic balance; Hydrostatic

weighing: Silicon density; Substitution balance: Volumetric

measurement: Water density: Water weighing: Air density:

Balance: Balance calibration: 7. 71C 3-254, 179-198 (1967).

D region: Ionosphere: Negative ions: Photo-detachment;

Recombination; 9252.

Drop calorimetry, enthalpy measurements; High-temperature

calorimetry; Phase transition: Pretransition phenomena;

Specific heat; Thermodynamic properties; Aluminum

trifluoride ; J. 71 A 3-450, 185-193 (1967).

Drop calorimetry: Enthalpy measurements; High-temperature

calorimetry; Mixed oxides; Specific heat; Thermodynamic

properties: Beryllium aluminate (1:3); J. 71 A 2-439, 97-103

(1967).

145
DRRS (direct reading ratio set); Junction; Precision measurements; Ratio: Resistor; Four-terminal; Resistance decade;

Transresistance; URS (universal ratio set): VERI (versatile

ratio instrument):/. 70C 3-228. 169-172 (1966).

Dry film lubrication: Polytetrafluoroethylene; Resin sintered

coatings; TFE-fluorocarbon; Coatings, dry film: CS274-66.

AS: Equilibria; Equilibrium concentration of monomer: a- trideuteromethyl-/3./3-dideuterostyrene: Lowering of steric repulsions; Polymeric anion: AH: 9254.

Duranickel; Nickel-aluminum precipitates; High temperatures:

Deformation: Cold-drawing; Creep; Nickel alloys; J. 70C

3-231, 195-205 (1966).

Dynamic analog correlation system; Combination metering and

safety valve; High temperatures; Transrotor engine; Platinum

resistance; TN295.

Dynamic calibration and telemetering; Electro-mechanical;

Pressure; Transducer: Calibration: Performance; Test method: T\'411.

Dynamo theory: Earth's core: Geomagnetism: Rotation of the

earth; Westward drift: Core-mantle coupling: Decade fluctuations; TN358.

E

Earthquakes, radiation sound; Ionospheric motions: Radiation

sound: Sound waves; 9225.

Earth's core: Geomagnetism: Rotation of the earth: Westward

drift: Core-mantle coupling: Decade fluctuations: Dynamo

theory; TN358.

Earth temperature; Least squares technique: Thermal diffusivity

of earth;/. 71C 1-442, 43-50 (1967).

Earth-to-space microwave transmissions: Microwave transmissions; Phase; Tracking; Atmospheric: Distance measurements; TN339.

Economics of corrosion: Industrial design; Materials protection:

Structural failure: Basic and applied research; 9351.

Editing: Journals: Publishing: Redacting: Abstracts: 9280.

Education: Operations research: Quantitative analysis; Management: Decision-making: TN414.

Effective aperture: Electromagnetic horns; Gain; Measurement:

Microwave; Mismatch errors; Rayleigh distance; Standard

gain horns: Antennas; Calibration: Comparison; TN351

Efi'ective force constants: Isotopic impurities: Local mode

frequencies: Nearest-neighbor interaction; Substitutional impurity: U-centers: Alkali halide crystal; Born-Mayer potential; Deformation dipole model; 9354.

Effectiveness; Evaluation: Performance: Relevance; Testing of

information systems: TN297.

Effective wavelength: Infrared and far infrared optical

pyrometry: Planck equation: Rayleigh-Jeans equation; Spectral radiance; Wien equation; Brightness temperature: Color

temperature: 9310.

Efficiency: Four-pi: Halpem; Neutron: Photoneutron;

Response; Yields; Detector; TN416.

£-functions: Integral transforms: Inversion formulas; Kernels;

J. 71B 2&3-203, 77-89 (1967).

Eigenfunctions: Energy levels; Wave functions; Single particle

shell model; Eigenvalues; TN410.

Eigenvalues; Eigenfunctions: Energy levels; Wave functions:

Single particle shell model; TN410.

Eigenvalues: Error term; Matrices: Norm bounds: Vector

bounds: Volterra vector integral equations; Asymptotic solu- tions:/. 70B 3-180. 167-186 (I9661.

Eigenvalues; Nonnegative matrices: Bounds: J. 71B 1-195,

39-41 (1967).

Eighteen cooperating laboratories: Vacuum fusion; Inert gas fu- sion; Oxygen; Ferrous standard reference materials; CO by

infrared absorbancy; Homogeneity; Certified value; M260-14.

Elastic compliances; Single crystal; Velocity of sound: Uranium

dioxide; Compressibility: Elastic constants; 9173.

Elastic constants; Elastic compliances: Single crystal: Velocity

of sound: Uranium dioxide: Compressibility: 9173.

Elastic constants: Lattice dynamics; Lattice parameter changes;

Single crystal ice; Speed of sound; Thermodynamic properties: 9383.

Elastic constants: Shear modulus: Young's modulus; Aluminum

oxide: Corundum: J. 70A 4-403. 277-280 ( 1 966).

Elastic fluid; Nonlinear behavior; Polyisobutylene; Recovery;

Stress; Relaxation: BKZ theory; Constant rate of strain; Creep: 7. 70A 6-423. 525-532 (1966).

Elasticity: Experiment: Maximum stresses; Symmetrical bending; Symmetrically distributed load: Theory; Circular plates;

Concentric loading: Design;/. 71C 1-438, 1-10 (1967).

Elasticity: Experimental; Flexure; Point supports; Simplified ap- proximate solutions: Thin plates: Bassali's theory: Concentric

loading: Circular plates: Deflecfion: J. 70C 4-234, 227-244

(1966) . Elastic moduli; Internal friction; Nickel-titanium alloy: Temperature dependence: Annealed specimens; Cold-worked

specimens; 95/7.

Elastic stress: Heat transfer; Plane strain: Thermal stress: Yield

stress:/. 70B4-188, 265-272 (1966).

Elastomers; Polybutadiene: Polyethylene; Polyisobutylene;

Rubber; Specific heat: Butadiene-acrylonitrile copolymer: Butadiene-styrene copolymers: Crystallization of rubber: 9520.

Electrical; Measurement; Ratio; Standards: Voltage; Volt box;

Calibration: Console;/. 70C 3-229, 1 73-1 85 (1966).

Electrical conductivity: Electrical resistivity: Heat conductivity;

Lorenz function: Platinum; Reference material; Resistivity;

Standard; Thermal conductivity: Conductivity: /. 71C 4-258,

255-284 (1967).

Electrical conductivity; Electrical resistivity: Heat conductivity;

Heat transfer: Iron; Lorenz function; Resistivity; Thermal

conductivity: Armco iron; Conductivity; /. 71C 4-259,

285-291 (1967).

Electrical connector: Feedthrough; High pressure: Resistance

gage; Ultrasonics: 9526.

Electrical discharge; Bibliography: Indexed: Flame: Spectroscopy; Analytical emission: .Atomic absorption: M281

Electrical discharges: Exploding wires; Light sources; Time-resolved spectroscopy; Titanium: TiO; Aluminum;

AlH; AlO: Atomic spectra: 9292.

Electncal resistivity; Heat conductivity; Lorenz function;

Platinum; Reference material: Resistivity: Standard; Thermal

conducfivity: Conductivity; Electrical conductivity: /. 71C

4-258,255-284(1967).

Electrical resistivity; Heat conductivity; Heat transfer; Iron; Lorenz function: Resistivity: Thermal conducfivity; Armco

iron: Conductivity: Electrical conductivity; /. 71C 4-259,

285-291 (1967).

Electrical tape, plasfic; Plastic tape: Polytetrafluoroethylene:

Resin skived tape; Skived tape; TFE-fluorocarbon; PS3-66.

Electrical testing: Conductance: Dielectric conductance: Conductivity: Volume conductivity: Insulation conductance: Resistance: Dielectric resistance; Resistivity: Dielectric constant: Permitfivity; Dissipation factor; Loss index: Dielectric

strength; 9174.

Electric dipole moments: Gas phase: Microwave: Microwave

absorption: Molecular beam: Permittivity: Refractive index:

Spectroscopy; Dielectric constant: NSRDS-NBSIO.

Electric discharge; Resonance lamp: Vacuum ultraviolet: Window seal: 9279.

Electric fields: Ionic crystals; Lattice sums; Point defects; Polarizafion; NaCl; CsCl; CaFj; ZnS; /. 71A 1-428, 1-2 (1967) . Electric hygrometer: Humidity: Thin films; Vacuum; Adsorption: Barium fluoride;/. 71C 3-255, 199-207 (1967).

146
Electrochemical analysis; Electrochemistry of solutions; Glass

electrodes; Medium effects; PH measurements; Acidity;

Analysis; Conductance measurements; TN423.

Electrochemical methods; Electron and optical microscopy;

Nuclear methods; Optical spectroscopy; Symposium on trace characterization; Trace characterization; X-ray spectroscopy;

Mono. 100. Electrochemistry; Electrolytes; Emf; Indicators; Isopiestic;

Vapor pressure; Methanol-water solvents; Thermodynamics;

Acidity; Analytical chemistry; Conductance; Deuterium oxide; Dissociation processes; TN400.

Electrochemistry of solutions; Glass electrodes; Medium ef- fects; PH measurements; Acidity; Analysis; Conductance

measurements; Electrochemical analysis; TN423.

Electrocrystallization; Electrodeposited crystals; Elec- trodeposited dendrites; Silver; Crystal growth; Dendrite;

9422.

Electrode capacitance; Surface layers; CaF2; Conductivity;

Crystals; Defect pairs: Dielectric relaxation; J. 71A 5-465,

355-362(1967).

Electrodeless discharge; Germanium spectra; Nitrogen spectra;

Silicon i; Silicon spectra; Vacuum ultraviolet standards;

Atomic spectrum of silicon; Carbon spectra; 9337.

Electrodeposited crystals; Electrodeposited dendrites; Silver; Crystal growth; Dendrite; Electrocrystallization; 9422.

Electrodeposited dendrites; Silver; Crystal growth; Dendrite;

Electrocrystallization; Electrodeposited crystals; 9422.

Electrodeposition; Electron back scatter; Electron probe

microanalyzer; Emission spectroscopy; Laser probe; Mass

spectroscopy; Photographic photometry; Plasma jet; Preconcentration; Pulse height analyzer; Spectrochemical analysis;

Spectroscopy; TN401.

Electrodes; Electrolysis; Glass; Molten salts; Conductance;

Diffusion; 9408.

Electrodynamic shaker; Piezoelectric accelerometers;

Reciprocity; Secondary standard; Vibration standard; Air

bearing; Ceramic moving element; 9297.

Electrolysis; Glass; Molten salts; Conductance; Diffusion; Electrodes; 9408.

Electrolytes: Emf; Indicators; Isopiestic; Vapor pressure;

Methanol-water solvents; Thermodynamics; Acidity: Analytical chemistry: Conductance; Deuterium oxide; Dissociation

processes; Electrochemistry; TN400.

Electrolytes; Methanol; m-nitrophenol; Nonaqueous solvents; Phenols; Thermodynamics; Dissociation; J. 71A 1-430, 9-12

{1967).

Electrolytic dissociation; Methanol-water solvents; Thermodynamics; Acid-base equilibria; Aminopyridine; Dissociation constant; 9493.

Electromagnetic; Telecommunication; United States; At- mospheric research; 9158.

Electromagnetic horns; Gain; Measurement; Microwave;

Mismatch errors; Rayleigh distance; Standard gain horns; Antennas; Calibration; Comparison; Effective aperture; TN351

Electro-mechanical; Pressure; Transducer; Calibration; Per- formance; Test method; Dynamic calibration and telemetering; TN411.

Electromotive force; Oil baths; Standard cells; Thermoelectric;

Connector; TN353.

Electromotive force; Standard cell facilities; Standard cell transfer; Standard cells; Volt standard; 9327.

Electron; Collision cross section; Atom; Molecule; M289.

Electron; Dissociation; H2*; 9171

Electron; Optical pumping; Sodium; Spin-exchange; 9275.

Electron absorption spectrum; Trisphenanthroline cobalt(ii) nitrate dihydrate; Trisphenanthrolinezinc nitrate dihydrate;7.

70X5-413.417-419(1966).

Electron affinity; Energy; Field gradient; Magnetic constants; Molecular electronic structure; Orbital energy; Polarizability;

Quadrupole moment; Spectroscopic constants; Ab initio elec- tronic calculation; Dipole moment; Dissociation energy;

TN438.

Electron affinity; Molecular structure; Negative hydroxyl ion; OD ions; OH ions; Photodetachment; Cross section; 9285.

Electron affinity; Positive and negative self-surface ionization; Tungsten; 9393.

Electron and optical microscopy; Nuclear methods; Optical

spectroscopy; Symposium on trace characterization; Trace

characterization; X-ray spectroscopy; Electrochemical

methods; Mono. 100. Electron backscatter; Cathodoiuminescence; Electron probe;

Microanalysis; X-ray spectrometry; Scanning electron microscopy; TN278.

Electron back scatter; Electron probe microanalyzer; Emission

spectroscopy; Laser probe; Mass spectroscopy; Photographic

photometry; Plasma jet; Preconcentration; Pulse height

analyzer; Spectrochemical analysis; Spectroscopy; Standard

reference materials; TN401

Electron beams; Energy distribution; 9405.

Electron compounds; Intermediate phases; Nonstoichiometric

phases; Osmium alloys; Platinum alloys; Transition elements;

Alloy phases; Atomic ordering; A15-type phases; Chromium

alloys; 9517.

Electron density; Electron temperature; Equivalent electrons; Local thermal equilibrium; Oscillator strength (f-value); Optical depth; Oxygen 11; Plasma; T-tube; Carbon 11: Coulomb ap- proximation; 9388.

Electron field emission; Hg on W; Nucleation; 9457.

Electronic; Excited states; H2O+; NH3+; NH2+; OH+ ions; Heats of formation; Ionization thresholds; Mass spectrometer; Photoionization: Radicals; Rydberg levels; J. 70A 6-417,

459-463 (1966).

Electronic data handling; NBS reactor; NBS Linac;

Cockroft-Walton generator; Digital computers; Activation

analysis; Standard reference materials; Photo-neutron reactions; Flux monitors; Cu, Se, Al, V in irons and steels; Homogeneity testing; TN404.

Electronic energy levels; Neutral atom; Promethium; Rare

earth: Atomic spectroscopy; 7. 71 A 6-475, 587-599 (1967).

Electronic states, energies of formation; Energies of motion; Interstitials: Point defects; Theory: Vacancies; Vibrational

states; Calculations: M287.

Electronic transition; Rotational analysis; Vacuum-ultraviolet

region; Absorption spectrum; CO; Diatomic spectrum; 9403.

Electron microscopy; Grain boundaries; Impurities: Sapphire:

Aluminium oxide; Dislocations; 9430.

Electron microscopy; Silver-tin alloy: Stacking-fault energy;

Dislocations: 9501.

Electron microscopy: Silver-tin alloys; Stacking-fault energy:

Stacking faults; Dislocation nodes; Dislocations; 9502.

Electron paramagnetic resonance; Flow system kinetics; Hydrogen atoms; Nitrogen atoms: Spin exchange cross sections; Spin relaxation time; 9289.

Electron probe: Microanalysis; X-ray spectrometry; Scanning

electron microscopy; Electron backscatter; Cathodoiuminescence; TN278.

Electron probe microanalyzer; NBS white cast iron sample

(SRM 1 175); Stainless steel powder metallurgy compact; Optical metallography: Macroanalytical techniques: Optical

emission; X-ray spectrochemical analysis; Microanalytical

techniques: M260-12.

Electron probe microanalyzer; Emission spectroscopy; Laser

probe; Mass spectroscopy: Photographic photometry; Plasma

jet; Preconcentration; Pulse height analyzer; Spectrochemical

analysis; Spectroscopy; Standard reference materials; Time-shared computer; TN401.

147
Electron probe microanalyzer; Wavelengths; X-ray emission;

X-ray spectrometers; TN406.

Electrons and photons; Interaction of radiation; Radiation,

charged particles; Charged particles; 9250.

Electron scattering; H2, H2-; Resonances; Vibrational excitation; 9365.

Electron scattering; Magnetic spectrometer; Magneto-optics;

9200.

Electron spin resonance; Free radicals; Polyvinyl alcohol; Polyethylene oxide; Tetrahydrofuran; Hydroxyl radicals; 9175.

Electron static susceptibility; Lattice-bath; Neodymium ethylsulfate; Relaxation time; Spin saturation; 9291

Electron temperature; Equivalent electrons; Local thermal

equilibrium; Oscillator strength (f-value); Optical depth; Oxygen II; Plasma; T-tube; Carbon 11; Coulomb approximation;

Electron density; 9388.

Electron temperature; Langmuir probe; Plasma; Spectrometric;

9382.

Electron tubes; Microwave electron tubes; Tabulation; Characteristics tabulation; H104.

Electron tubes; Similar types; Tabulation; Basing connections;

Characteristics; H103.

Electroplating; Galvanic corrosion; Pitting; Pitting corrosion;

Corrosion; Corrosion currents; 9490.

Electrostatic model; Inelastic neutron scattering; Phosphonium

iodide (PH4I); Barrier to rotation; 9503.

Elemental analysis; Homogeneity; Lithium content; Molecular

weights; Polymer; Preparation; Purity; Sampling; Standard

sample; Volatile content; Ash content; J. 71A 1-435, 43-47

(1967).

Elementary abelian groups; Generator rank; Sylow subgroups;

Bounds; J. 71B 4-251, 247-248(1967).

Elements; Isotopes; Nuclear physics; Photonuclear reactions; Bibliography; Data index; M277, Supplement 1

Elements in sun; Equivalent widths of solar lines; Identification of solar lines; Molecules in sun; Solar spectrum; Wavelengths

of solar lines; Mono. 61

Elevated-temperature emissivity; Infrared absorption coeffi- cients; Infrared emissivity; Polycrystalline CaF2;

Single-crystal CaF2; Calcium fluoride; 9312.

Elevated temperatures; Optical comparator; Thermal expansion; Controlled-gradient vacuum furnace; J. 71C 2-247, 85-91

(1967).

Ellipsometer; Multiple reflections; Quarter-wave plate; 9522.

Ellipsometry; Iron; Iron oxide films; Kinetics; Passivity; Potentiostat; Anodic oxidation; 9469.

Ellipsometry; Mercury; Optical constants; Refractive inaex.

Surface films; Complex refractive index; 9509.

Emf; Indicators; Isopiestic; Vapor pressure; Methanol-water

solvents; Thermodynamics; Acidity; Analytical chemistry;

Conductance; Deuterium oxide; Dissociation processes;

Electrochemistry; Electrolytes; TN400.

Emf; Ionization; Isotope effects; Thermodynamics; Weak electrolytes; Acetic acid-i/4; Acid-base; Deuterium oxide; Dissociation constants; 9492.

Emf measurements; Morpholine; Morpholinium ion; Thermodynamic quantities; Bases; Dissociation constant; 9460.

Emission; Energy levels; X-ray wavelength; Absorption;

Atomic; Data compilation; NSRDS-NBS14.

Emission spectroscopy; Laser probe; Mass spectroscopy;

Photographic photometry; Plasma jet; Preconcentration;

Pulse height analyzer; Spectrochemical analysis; Spectroscopy; Standard reference materials; Time-shared computer;

X-ray spectroscopy; Analysis; TN401

Emission spectrum; Energy transfer; Experimental; Gas; Oxygen atom; Oxidation; Population distribution; Rotation;

Acetylene; CH; Chemiluminescence; Cross section; 9288.

Emissivity; Emittance; Flux averaging devices; Infrared

reflectance; Spectral reflectance; Spectral emittance; Specular

reflectance; Averaging spheres; Diffuse reflectance; TN415.

Emissivity; Emittance; High temperature reflectance; Infrared

reflectance; Radiation properties; Reflectance; Spectral

emittance; Spectral reflectance; Thermal radiation; Total

emittance; TN292.

Emissivity; Emittance measurements; Radiant heat transfer; Reflectance measurements; Thermal radiation; Computational methods; 9303.

Emittance; Error sources; Magnesia; Measurement uncertainties; Spectral emittance; Thermal radiation; Thoria; Zirconia;

Alumina; Ceramic oxides; 7. 70A 5-412, 393-41 5 ( 1966).

Emittance; Flux averaging devices; Infrared reflectance; Spectral reflectance; Spectral emittance; Specular reflectance; Averaging spheres; Diffuse reflectance; Emissivity; TN415.

Emittance; High temperature reflectance; Infrared reflectance; Radiation properties; Reflectance; Spectral emittance; Spectral reflectance; Thermal radiation; Total emittance; Emissivity; TN292.

Emittance measurements; Radiant heat transfer; Reflectance

measurements; Thermal radiation; Computational methods;

Emissivity; 9303.

Empirical and semi-empirical; Transport properties; Virial coefficients; Atoms; Compressibility; Heat of sublimation;

Molecules; Potential functions; TN246.

End-to-end bonding; Hydrophobic bonding; Lateral aggregation;

Native aggregation; Temperature coefficient; Collagen; 9436.

End-to-end length; Fokker-Planck equation; Polymer chain

dynamics; Radius of gyration; Relaxation; Statistical-bead model; Autocorrelation; Correlation; 9515.

End-to-end length; Lattice model; Monte Carlo; Polymer chain

dynamics; Relaxation; Simulation; Distribution; 9514.

Endurance; Fire; Flammability tests; Paints; Combustibility;

9176.

Energies of motion; Interstitials; Point defects; Theory; Vacancies; Vibrational states; Calculations; Electronic states, energies of formation; M287.

Energy, required to create an electron-hole pair; Low temperature; Recombination; Shockley theory of e; Silicon radiation detectors; Trapping; 9299.

Energy; Field gradient; Magnetic constants; Molecular elec- tronic structure; Orbital energy; Polarizability; Quadrupoie

moment; Spectroscopic constants; initio electronic calculation; Dipole moment; Dissociation energy; Electron affinity;

TN438.

Energy; Interaction; Isotropic; Straight; Continuum; Crystal;

Defect; Dislocation; 9446.

Energy distribution; Electron beams; 9405.

Energy distribution; Field emission; Patch fields; Single crystal

planes; Work function; 9423.

Energy distribution; Field emission; Patch fields; Tungsten;

Work function; (1 10) plane; 9424.

Energy levels; Iron; Iron, lifetimes in; Lifetimes in Fe i; Radiative lifetimes; Spectroscopy; Atomic spectra; J. 71A 6-472,

567-573 (1967).

Energy levels; Wave functions; Single particle shell model;

Eigenvalues; Eigenfunctions; TN410.

Energy levels; X-ray wavelength; Absorption; Atomic; Data

compilation; Emission; NSRDS-NBS14.

Energy of activation; Initial kinetic parameters; Non-isothermal

kinetics; Polyethylene; Polymer degradation; Stability of

polymers; Thermogravimetry; 9451

Energy spectrum; Gamma rays; Neutrons; Point source; Shielding; Single scatter; Air-scatter; Angular distribution; 9308.

Energy storage; Induction coil; Liquid hydrogen; Aluminum;

Cryogenic magnet; 9429.

148
Energy transfer; Experimental; Gas; Oxygen atom; Oxidation;

Population distribution; Rotation; Acetylene; CH; Chemiluminescence; Cross section; Emission spectrum; 9288.

Energy transfer; Fluorescence; Hydrazoic acid; Nitrous oxide;

Photolysis; 9418.

Energy transfer; Photolysis; Triplet state; Vapor phase; Al- dehyde; 9385.

Engineering measurements and standards; Measurement stan- dards; Properties of matter and materials; M282.

Engineering standards; International and national standards activities; OESLA; Standards-making bodies; 931 5. Enthalpy; Entropy; Fermi-Dirac gas; Helium-3; Helium-4;

Liquid; Mixtures; Osmotic pressure; Quantum fluid; Specific

heat; Thermodynamic properties; Cryogenics; Dilution

refrigerator; TN362.

Enthalpy; Entropy; Gibbs energy; Heat capacity; Low temperature calorimetry; Thermodynamic properties; Beryllium

1 :3-aluminate; J. 71A 1-429, 3-8 (1967).

Enthalpy; Entropy; Parahydrogen; Pressure-volume; Properties; Temperatures; Triple-point region; T-S diagram; TN343.

Enthalpy; Heavier elements; Literature survey; Refractory compounds; Thermodynamic; Vaporization; 9153.

Enthalpy adjustments; Heat of vaporization; High temperature

chemistry; Overestimation of standard deviation; Second law

heat; Slope estimators; Third law heat; Vapor pressure; Bias

of least squares estimators; y. 70A 6-424. 533-539, (1966).

Enthalpy determination; KCI-CdCl^ system; Molten salts; Calorimeter; Calorimetry; Complex ion; 9485.

Enthalpy measurements; High-temperature calorimetry; Mixed

oxides; Specific heat; Thermodynamic properties; Beryllium

aluminate; Chrysoberyl, drop calorimetry; J. 71 A 2-438, 89-95

(1967).

Enthalpy measurements; High-temperature calorimetry; Mixed

oxides; Specific heat; Thermodynamic properties; Beryllium

aluminate (1:3); Drop calorimetry; J. 71A 2-439, 97-103

(1967).

Entropy; Equilibrium; Heat of reaction; Oxygen pressures;

Silver oxide; Dissociation by heat; 9377.

Entropy; Fermi-Dirac gas; Helium-3; Helium-4; Liquid; Mixtures; Osmotic pressure; Quantum fluid; Specific heat; Thermodynamic properties; Cryogenics; Dilution refrigerator;

Enthalpy; TN362.

Entropy; Gibbs energy; Heat capacity; Low temperature

calorimetry; Thermodynamic properties; Beryllium l:3-alu- minate; Enthalpy;^. 71A 1-429, 3-8 (1967).

Entropy; Parahydrogen; Pressure-volume; Properties; Temperatures; Triple-point region; T-S diagram; Enthalpy;

TN343.

Environment; Personnel; Professional environment; Professional personnel; Scientists and engineers; Standing committee; Technical personnel; 9271

Environmental effects; Melting point; Premelting; AI2O3; Dis- sociation;y. 71A4-463, 317-333 (1967).

Epitaxial GaAs lasers; Fermi levels; Radiative recombination;

Compensated GaAs; 9518.

EPR; G value; K-band spectrometer; NiBra; Single crystal; Antiferromagnetic; 9419.

EPr matrices; Generalized inverse; Matrix; J. 718 2&3-198,

57-60(1967).

E.p.r. analysis; Jahn-Teller effect; Polarized ultraviolet spec- trum; Tetrachlorocuprate ion; Copper doped tetrachlorozincate; 9191.

Equation of state; Hydrogen; Parahydrogen; PKT-relations;

Thermodynamic properties; 7. 71A 3-452, 203-218 (1967).

Equation of state; Statistical mechanics; Intermolecular potential; Second virial coefficient; Quantum mechanics;

Hydrogen; TN412.

Equilibria; Equilibrium concentration of monomer; a-trideu- teromethyl-;8,/3-dideuterostyrene; Lowering of steric repul- sions; Polymeric anion; AH; AS; 9254.

Equilibrium; Estimates; Thermodynamics; Beryllium oxide;

Calorimetry; Chemical propulsion; 9301

Equilibrium; Heat of reaction; Oxygen pressures; Silver oxide;

Dissociation by heat; Entropy; 9377.

Equilibrium; Microwave spectrum; Structure; Dinitrogen triox- ide; 925i. Equilibrium concentration of monomer; a-trideuteromethyl-/3,/3-

dideuterostyrene; Lowering of steric repulsions; Polymeric

anion; AH; AS; Equilibria; 9254.

Equilibrium properties; Experimental data; Intermolecular

potential function; Theory; Transport properties; Correlation;

TN360.

Equivalent electrons; Local thermal equilibrium; Oscillator

strength (f-value); Optical depth; Oxygen 11; Plasma; T-tube;

Carbon 11; Coulomb approximation; Electron density; Elec- tron temperature; 9388.

Equivalent widths of solar lines; Identification of solar lines; Molecules in sun; Solar spectrum; Wavelengths of solar lines; Elements in sun; Mono. 61

Error; Formula; Imprecision; Law of error; Products; Propagation of error; Random; Ratio; Systematic; Sum; Approximation;y. 70C 4-237. 263-273 (1966). Error analysis; Miller algorithm; Recurrence methods; Special

functions; Chebyshev series; Difference equations; J. 71B

2&3-206, 111-129(1967).

Error bounds; Integral equations; Matrices; Asymptotic solu- tions;7.70B 3-181. 187-210 (1966). Error bounds; Miller algorithm; Recurrence relations; Special

functions; Chebyshev series; Difference equations; J. 718

4-238. 161-166(1967).

Errors; Chemical literature; Critical data; Data evaluation;

9309.

Errors; Heating; Voltage divider; Volt-box; Calibration; 9305. Error sources; Magnesia; Measurement uncertainties; Spectral

emittance; Thermal radiation; Thoria; Zirconia; Alumina;

Ceramic oxides; Emittance;^. 7QA5-412, 393-415 (1966). Error term; Matrices; Norm bounds; Vector bounds; Volterra vector integral equations; Asymptotic solutions; Eigenvalues;

J. 708 3-180, 167-186(1966).

Estimates; Thermodynamics; Beryllium oxide; Calorimetry;

Chemical propulsion; Equilibrium; 9301

Ethane; Ethylene; Flash photolysis; Gas phase; Hydrogen;

Hydrogen deuteride; Insertion; Methane; Methyne; Rate; Vacuum ultraviolet; Acetylene; Combination; 9286.

Ethylbenzene; Extinction coefficient; Polymer; Polystyrene;

Solvent effects; Ultraviolet absorption; Carbon tetrachloride; Cyclohexane;y. 71X2-449, 169-175 (1967).

Ethylene; Ethylidene; Gas phase; Photolysis; Solid phase;

Vacuum ultraviolet; Carbene; 9415.

Ethylene; Flash photolysis; Gas phase; Hydrogen; Hydrogen

deuteride; Insertion; Methane; Methyne; Rate; Vacuum ul- traviolet; Acetylene; Combination; Ethane; 9286.

Ethylene; Mass spectra; Photoionization; Rydberg; Threshold

energies; Autoionization; 1 ,2-dideuteroethylene; 9257.

Ethylene-propylene; Linear polyethylene; Stress relaxation; Thermolytic chain scission; Copolymer; 9264.

Ethylidene; Gas phase; Photolysis; Solid phase; Vacuum ul- traviolet; Carbene; Ethylene; 9415.

Eucken correction; Correlation; Dilute gases; Nitrogen; Oxygen; Transport coefficients; Lennard-Jones; Kihara; Exp: 6; Morse potential functions; TN350.

Evaluation; Newton form; Polynomial; Relative error; Round-off; J. 718 1-191, 11-17(1967).

Evaluation; Performance; Relevance; Testing of information

systems; Effectiveness; TN297.

Even; Graphic; Matroid; Binary; Bridge-separable; J. 718

4-245,213-214 (1967).

149
Exact solutions; Hilbert matrices; Linear equations; Modular

aritiimetic;^. 71B 4-240, 171-179 (1967).

Excitation; Ionization; Line intensity; Saha equilibrium; Spark;

Spectrochemical analysis; Spectroscopic source; Arc; Boltz- mann equilibrium; 9361

Excited states; H2O+; NH3+; NH2+; OH+ ions; Heats of formation; Ionization thresholds; Mass spectrometer; Photoionization; Radicals; Rydberg levels; Vacuum monochromators; J. 70A 6-417, 459-463 (1966).

Exp: 6, Morse; Potential functions; Dilute gases; Neon; Krypton; Xenon; Transport coefficients; Correlations; M-6;

Kihara; TN352.

Exp: 6; Morse potential functions; Eucken correction; Correlation; Dilute gases; Nitrogen; Oxygen; Transport coefficients; Lennard-Jones; Kihara; TN350.

Expansion turbine; Gas bearings; Helium refrigeration; Per- formance; 9800 RPS; 200 Watts (30 °K); Design; 9151.

Experiment; Maximum stresses; Symmetrical bending; Symmetrically distributed load; Theory; Circular plates; Concentric

loading; Design; Elasticity; 7. 71C 1-438, 1-10 (1967).

Experimental; Flexure; Point supports; Simplified approximate

solutions; Thin plates; Bassali's theory; Concentric loading;

Circular plates; Deflection; Elasticity; J. 70C 4-234, 227-244

(1966).

Experimental; Gas; Oxygen atom; Oxidation; Population dis- tribution; Rotation; Acetylene; CH; Chemiluminescence;

Cross sectbn; Emission spectrum; Energy transfer; 9288.

Experimental; Graphical solution; Hyperbolic character; Limiting values; TN435.

Experimental; Helium-methane; Low temperature;

Phase-equilibrium; Solid-vapor; 9230.

Experimental data; Intermolecular potential function; Theory;

Transport properties; Correlation; Equilibrium properties;

TN360.

Experiment design; Saturated standard cells; Standard ceils calibration; Statistics; Voltage standard; Control charts; TN430.

Exploding wires; Light sources; Time-resolved spectroscopy;

Titanium; TiO; Aluminum; AlH; AlO; Atomic spectra; Electrical discharges; 9292.

Exponential relaxation; Master equation; Moments; Probability

distributions; Relaxation; Transition probabilities; 9527.

Exposure; Photography; Standards; 9372.

Extension; Grain-crack; Mullen test; Burst of leather; 9466.

Exterior; Grading; Interior; Moisture content; Overlay;

Plywood; Shear test; Vacuum and pressure test; Adhesives;

Boil test; Bonding; PSl-66.

External tensor permeability; Ferrimagnetic resonance; Ferrites; Garnet; Low magnetic field effects; Permeability; Spin waves; Tensor permeability; YIG; 9395.

External wall units; Innovation; Long-time behavior; Per- formance standards; Accelerated tests; Bathtubs; 9452.

Extinction coefficient; Polymer; Polystyrene; Solvent effects; Ultraviolet absorption; Carbon tetrachloride: Cyclohexane;

Ethylbenzene;y. 71X2-449, 169-175 (1967).

Extrinsic faults; Silver-tin alloy; Stacking fault energy; Dislocations; 9459.

F

Fabry-Perot interferometer; Airglow photometry; 7. 70C 3-226,

159-163 (1966). Face; Frame; Lineality space; Linear programming; Algorithm;

Cone; Convex hull; J. 71B 1-189, 1-7 (1967). Factor set; Group extension; Level; Modular group; Parabolic

class number; Quotient surface; Split extension; 9317.

Fading characteristics; Textiles; Fading standardization;

Light-sensitive paper; Booklets of faded strips; M260-15.

Fading standardization; Light-sensitive paper; Booklets of faded

strips; Fading characteristics; Texfiles; M260-15.

Failure mechanisms; Failure modes; Second breakdown;

Semiconductor devices; Thermal breakdown; Transistors;

Bibliography; Device reliability; Diodes; TN431.

Failure modes; Second breakdown; Semiconductor devices;

Thermal breakdown; Transistors; Bibliography; Device relia- bility; Diodes; Failure mechanisms; TN431

Far infrared; Natural rubber; Sulfur; Tetramethylthiuram disul- fide; Vulcanization; Zinc dibutyldithiocarbamate; Zinc

dimethyldithiocarbamate; Accelerators; J. 71A 1-432, 19-23

(1967).

Far ultraviolet; Germanium; Kronig- Kramers dispersion rela- tions; Optical properties; Sum rules; Characteristic electron energy loss; 9345.

F atom reactions; Force constants; HNF; HNF.; Infrared spec- trum; Matrix isolation; NF; NF2; Thermodynamic properties;

Visible-ultraviolet spectrum; 9335.

F atom reactions; HCF:; photolysis; Infrared spectrum; Matrix

isolation technique; CF2 reactions; CF3 free radical; CFaBr

photolysis; 9368.

Federal statistical system: Inherent computability; Matching;

Probability master samples; Propagation of error computations; Statistical standards; Automatic data processing equip- ment; Confidentiality audits; Disaggregation; Disclosure

criteria; 9247.

Feedback analysis; Optimization of variables 10 MW nuclear

reactor; Pneumatic tubes: Radiochemical laboratories; 14 MeV neutron generator; 100 MeV-40 KW LINAC; Clean room: Computers; Counting rooms; 9154.

Feedthrough: High pressure; Resistance gage; Ultrasonics;

Electrical connector; 9526.

Fe-Ni-Cr alloys; Neel temperature; Shear modulus; Stainless

steel; Antiferromagnetic; Cold-work; J. 70C 3-232, 207-210

(1966).

Fermi-Dirac gas; Helium-3; Helium-4; Liquid; Mixtures;

Osmotic pressure; Quantum fluid; Specific heat; Thermodynamic properties; Cryogenics; Dilution refrigerator;

Enthalpy; Entropy; TN362.

Fermi levels; Radiative recombination; Compensated GaAs;

Epitaxial GaAs lasers; 9518.

Fermi surface; Magnetoacoustic absorption; Potassium; Single

crystals; Zone refining; 9197.

Fermi surface; Orientation; Potassium; Spark cutting; Zone

refining; Crystal growth; 7. 7l\ 2-443. 127-132 (1967).

Ferrimagnetic resonance; Ferrites; Garnet; Low magnetic field effects: Permeability: Spin waves; Tensor permeability; YIG;

External tensor permeability; 9395.

Ferrites; Garnet; Low magnetic field effects; Permeability: Spin waves; Tensor permeability; YIG; External tensor permeability; Ferrimagnetic resonance; 9395.

Ferro- and ferrimagnetism; Magnetization; Magnetometer

calibration; Measurement of magnetization; Saturafion magnetization; Vibrating-sample magnetometer; J. 70C 4-236,

255-262(1966).

Ferroelectrics; H2O; Ice; Inelastic scattering;

K4Fe(CN)H • 3H2O; Librations; Low-frequency modes;

Neutron cross-sections; Neutron spectra; Phase transition; 9504.

Ferromagnetism; Hyperfine field; NMR; Nuclear interaction; Nuclear quadrupole resonance; Thermal expansion; 9219. Ferrous SRMs; Stoichiometric mixtures uranium oxide; Isotope

ratio determination; Spectrophotometric titration; Controlled

potential coulometric; Molybdenum; Homogeneous precipitation; Aluminum; Beryllium; Thermoanalytical standards; Tri- calcium silicate: TN402.

Ferrous standard reference materials; CO by infrared absorbancy; Homogeneity; Certified value; Eighteen cooperating

laboratories; Vacuum fusion; Inert gas fusion; Oxygen;

M260-14.

150
Fiber board; Hardboard; Ligno-cellulosic fibers; Lignin and

hot pressed fibers; CS251-63.

Fiber elongation; Glass; Glass standard; Glass viscosity;

Lead-silica glass; Restrained sphere; Rotating cylinders; Stan- dard; Standard reference material; Viscosity; Viscosity stan- dard; Beam bending; M260-1 1. Fiber optics; X rays; 9363.

Fibers; Microfocus tubes; Microradiography; Nylon;

Polyacrylonitrile; Polyamides; Reflection of x-rays; Soft

x-rays; X-rays; 9488.

Field, near-zone electromagnetic; Hazards, electromagnetic

radiation; Line, nonmetallic electrical transmission; Line,

semiconducting plastic transmission; Meter, electric field-strength; Telemetry, novel form of; J. 71C 1-443, 51-57

(1967).

Field, near-zone electromagnetic; Hazards, electromagnetic

radiation; Line, non-metallic electrical transmission; Line,

semi-conducting plastic transmission; Meter, electric field-strength; Telemetry, novel form of; Device, electro-ex- plosive ordnance; TN345.

Field; Hazards; Line; Meter; Telemetry; Device; 9318.

Field-electron emission microscopy; Heterogeneous nucleation;

Vapor deposition; Critical nucleus; 9483.

Field emission; Nitrogen; Rhenium; Chemisorption; 9340.

Field emission; Patch fields; Single crystal planes; Work function; Energy distribution; 9423.

Field emission; Patch fields; Tungsten; Work function; (110)

plane; Energy distribution; 9424.

Field emission microscopy; Kinetic; Nitric oxide; Surface; Sur- face diffusion; Tungsten; Work function; Adsorption; Chemisorption; Desorption; Dissociation; 9421.

Field evaporation; Field ion microscopy; Hep metals; Surface

structure; 9484.

Field gradient; Magnetic constants; Molecular electronic struc- ture; Orbital energy; Polarizability; Quadrupole moment;

Spectroscopic constants; Ab initio electronic calculation; Dipole moment; Dissociation energy; Electron affinity; Energy; TN438.

Field ion microscopy; Hep metals; Surface structure; Field

evaporation; 9484.

Filling materials; Hardening; Shrinkage; Strain; Stress; Tensile;

Adhesion; Bonding; Dental; 9433.

Filter; Pickup; DC-amplifiers; 9241.

Fire; Flammability tests; Paints; Combustibility; Endurance:

9776.

Fire endurance; Fire severity; Floor tests; Steel plate floors; Burnout tests; B557/.

Fire load; Fire performance; Flame penetration; Potential heat; Structural load; Apartment dwelling; Burnout test; BSSIO.

Fire performance; Flame penetration; Potential heat; Structural

load; Apartment dwelling; Burnout test; Fire load; BSSIO.

Fire severity; Floor tests; Steel plate floors; Burnout tests; Fire

endurance ; B55 //

First spectrum; Multiplet table; Silicon; Spectrum, Si i; Wavelengths, Si i; Atomic energy levels; Atomic spectra Si i; NSRDS-NBS3, Section 2. Fission-induced cavitation; Neutron-induced cavitation; Radiation-induced cavitation; Threshold; Acoustic cavitation; Alpha-particle-induced cavitation; Cavitation; Cavitation

nucleus; Cavitation threshold; J. 71C 4-261, 299-312 (1967).

s^Flame; Spectroscopy; Analytical emission; Atomic absorption;

Electrical discharge; Bibliography; Indexed; M281

Flame penetration: Potential heat; Structural load; Apartment

dwelling; Burnout test; Fire load; Fire performance; BSSIO.

Flame photometry; Spectroscopy; Atomic absorption spec- trometry; Atomic emission spectrometry; Atomic

fluorescence spectrometry; 9481

Flammability tests; Paints; Combustibility; Endurance; Fire; 9176.

Flash photolysis; Gas phase; Hydrogen; Hydrogen deuteride;

Insertion; Methane; Methyne; Rate; Vacuum ultraviolet; Acetylene; Combination; Ethane; Ethylene; 9286.

Flash photolysis; Lifetime; Matrix isolation; Primary process;

Decay; 9396.

Flash photolysis; Vacuum ultraviolet; Apparatus description;

9287.

Flexible tubing pump; Inverting amplifiers; Laser beam phase

shift; Laser heterodyning; Liquid metering pump; Optical

refractive index; Programmed document distribution; Relaxation oscillator; Rotatable document bin array; Seat belt webbing abrasion; TN437.

Flexure; Point supports; Simplified approximate solutions; Thin

plates; Bassali's theory; Concentric loading; Circular plates;

Deflection; Elasticity; Experimental; J. 70C 4-234, 227-244

(1966).

Flooring; Installation; Standards; Adhesive industrial; Characteristics; Conductive; 9177.

Floor tests; Steel plate floors; Burnout tests; Fire endurance;

Fire severity; BSSl 1

Flow calorimeter; Radio frequency power; Coaxial; J. 71C

2-250, 111-117(1967).

Flow comparison; Fluid flow; Incompressible flow; Mass flow; Pressure drop; Compressible flow; TN356.

Flowmeter; Gas meter; Heat transfer; Laminar flow; Meter

calibration; Compressible flow; 9390.

Flowmeters; Mass flow; Mass flowmeters; Performance results; Propellant management; Substitute fluid; Volume flow; Accuracy; Calibration; Commodity transfer; Cryogenic; Cryogenic

processes; Density; 9428.

Flow properties; Kaolins; Surface area; Cation exchange capacity; Cone-plate viscometer; Crystallinity; 9491.

Flow system kinetics; Hydrogen atoms; Nitrogen atoms; Spin

exchange cross sections; Spin relaxation time; Electron

paramagnetic resonance; 9289.

Fluid flow; Incompressible flow; Mass flow; Pressure drop;

Compressible flow; Flow comparison; TN356.

Fluid parahydrogen; Macroscopic polarizability; Dielectric

polarizability; Dipole moment; 9248.

Fluorescence; Hyrlrazoic acid; NH; Photolysis; Vacuum ul- traviolet; 9417.

Fluorescence; Hydrazoic acid; Nitrous oxide; Photolysis; Ener- gy transfer; 9418.

Fluorescence; Nitric oxide; Nitrogen dioxide; Nitrosyl chloride; Vacuum ultraviolet; 9416.

Fluorescent soils; Porcelain enamel; Soil, residual; Cleanability,

porcelain enamel surfaces; 9222.

Fluorinated ethylene-propylene; Humidity; Polycarbonate;

Polyethylene; Poly( 1 ,4-cyclohexylenedimethylene terephthalate); Polystyrene; Poly(tetrafluoroethylene); Time; Reference

specimens; Dielectric constant; 7. 71C 2-257, 119-125 (1967).

Fluorine; Fluorine bomb calorimetry; Graphite; Heat of combustion; Heat of formation; Hydrogen fluoride aqueous;

Teflon; Aluminum fluoride; Carbon tetrafluoride; J. 71A

2-440, 105-118(1967).

Fluorine; Heat of combustion; Heat of formation; Teflon; Aluminum diboride; a-aluminum dodecaboride: Aluminum

fluoride; Bomb calorimeter; Boron trifluoride; J. 71A 4-462,

307-315(1967).

Fluorine; Heat of combustion; Polytetrafluoroethylene (Teflon);

Refractory compounds; Aluminum borides; Boron; Boron

carbide; Carbon; 9270.

Fluorine; Heat of formation; Teflon; Bomb calorimeter; Boron; Boron trifluoride; 7. 71 A 3-451, 195-202 (1967).

Fluorine; High temperature; Kinetics; Mass spectrometry;

Nickel; Surface reaction; 9374.

Fluorine; NMR; Polysilanes; Silicon; Sub-halides; Boron; 9229.

151
Fluorine bomb calorimetry; Graphite; Heat of combustion: Heat

of formation; Hydrogen fluoride aqueous: Teflon; Aluminum

fluoride; Carbon tetrafluoride; Fluorine: J. 71A 2-440,

105-118(1967).

Flush diaphragm: Pressure gage: Temperature: Temperature

gradient: Transducers; 9258.

Flux averaging devices: Infrared reflectance; Spectral

reflectance; Spectral emittance: Specular reflectance; Averaging spheres; Diffuse reflectance; Emissivity; Emittance;

TN415.

Flux monitors; Cu. Se, Al, V in irons and steels: Homogeneity

testing; Pneumatic rabbit sensor; Mossbauer spectroscopy;

Tin standard for chemical shift: PARLORS program for Mossbauer spectra; Mossbauer instrumentation: Mossbauer

laboratories; TN404.

Flux monitors; High precision 14 MeV neutron activation; Homogeneity testing; Instrumentation: NBS Linac: NBS

reactor; Photoneutron reactions: Self absorption corrections:

Standard reference materials: Vanadium in irons and steels; Activation analysis; Biological: Botanical samples; Carbon

in sodium; Cockroft-Walton generator; Digital computers:

TN428.

Flux monitors; Mossbauer instrumentation: Mossbauer sf>ec- troscopy; NBS Linac; Nickel-61: PARLORS program for Mossbauer spectra; Photoneutron reaction; Solid state detectors: Standard reference materials; Tin standard for chemical

shift: Computers; TN421

Fokker-Planck equation: Polymer chain dynamics: Radius of

gyration; Relaxation: Statistical-bead model: Autocorrelation;

Correlation; End-to-end length; 9575.

Folding: Gaussian: Square; Trapezoidal; Triangular: Dispersion; Distributions; 9398.

Forbidden transition; High resolution: Spectrum: Vacuum ul- traviolet; Absorption; Carbon monoxide; 9330. Force; Constants; Spectral; Molecular: Vibrational: Frequencies: Data: Tables: NSRDS-NBS6.

Force constants; HNF: HNF2: Infrared spectrum; Matrix isola- tion; NF: NFo; Thermodynamic properties; Visible-ultraviolet spectrum: F atom reactions: 9335.

Force constants: Infrared spectra; Modes of vibration: Molecular vibrational frequencies; Molecular spectra; Raman spectra; Data: NSRDS-NBSl 1

Force constants; Infrared spectrum; NCN free radical; Thermodynamic properties; Ultraviolet photolysis; Carbon atom

production: Carbon atom reactions; Cyanogen azide: 9369.

Force field; Infrared: Osmium tetraoxide: Vibration-rotation;

Coriolis constant; 9349.

Force fields; High resolution: Infrared: vs: Vibration-rotation;

^3: ^4; Band contours: BF3: Coriolis force: 9268.

Foreign standards laboratories; Laboratory management; Measurements and standards; Measurement system; National

Conference of Standards Laboratories; Proceedings, 1966

Standards Laboratory Conference; Traceability; United

States measurement system; M291

Formula: Imprecision: Law of error: Products; Propagation of

error; Random; Ratio: Systematic: Sum; Approximation; Error; 7. 70C 4-23 7, 263-2 73(1966).

Fortran program: Wigner coefficients: Quantum theory of angular momentum: 3j coefficient: 6j coefficient: 9j coefficient: Clebsch-Gordan coefficients; TN409.

Fourier expansion; //-groups: Automorphic forms: Discontinu- ous groups; J. 71B 4-239, 167-169(1 967).

Fourier series: Piecewise; Smoothing; Continuous function; J. 71C 2-248, 93-100(1967).

Fourier-transform: Functional transforms; Generalized

MacRobert's function; Hankel transform, A^-transform: Laplace transform, MacRobert's function; K-transform: J. 71B

1-194. 23-37 (1967).

Fourier transform; Function V(q): Harmonic oscillator: Matrix

elements; 9420.

Four-pi; Halpern; Neutron: Photoneutron: Response: Yields: Detector: Efficiency: TN416.

Four-terminal; Resistance decade: Transresistance: URS (u- niversal ratio set); VERI (versatile ratio instrument); DRRS

(direct reading ratio set); Junction: Precision measurements;

Ratio: Resistor: 7. 70C 169-172 (1966). Fracture mirror size: Modulus rupture: Thermally tempered

glass; 9227.

Fracture topography; Kinetics: Polymeric solids: Primary frac- ture front: Topography: Brittle polymers; 9487.

Fragment ions; Ionization: Mass spectrometer: Molecule: NO2;

NO2* N2O+; Photoionization; Threshold: Ultraviolet: Vacuum: Dissociation; J. 71A 5-467, 371-378 (1967).

Frame; Lineality space; Linear programming: Algorithm: Cone:

Convex hull: Face: J. 71B 7-759, 1-7(1967).

Frame embedding; Two-dimensional languages; Chinese characters; Grammar; Generative grammar; Component combination; Phrase structure grammar; Linguistics: TN296.

Free group; Handlebody: Homeomorphism: Simply connected:

Topology: 3-manifold: 3-sphere; J. 718 2&3-197, 53-56

(1967). Free products: Groups; Representations: 9348. Free radical: Microwave spectrum: Structure: CF2; Dipole moment: 9380. Free radicals: Ion-molecules reactions; Neopentane; Photolysis:

Radiolysis: 9180. Free radicals: Polyvinyl alcohol: Polyethylene oxide:

Tetrahydrofuran; Hydroxyl radicals: Electron spin resonance:

97 75. Freezing liquid densities: Hydrogen: Melting-line liquid densities: Orthobaric densities: Parahydrogen; J. 70A 6^25,

541-544(1966).

Freight operations; GPSS; Railroads: Scheduling: SIMSCRIPT: Simulation: Sorting; 9427.

Frequencies: Data; Tables: Force; Constants; Spectral:

Molecular; Vibrational; NSRDS-NBS6.

Frequency; Fluorinated ethylene-propylene: Humidity;

Polycarbonate; Polyethylene: Poly( 1 .4-cyclohexylenedimethylene terephthalate); Polystyrene:

Poly(tetrafluoroethylene); Time; Reference specimens: Dielectric constant;/. 71C2-257, 119-125 (1967).

Frequency; Inelastic scattering; Metal hydrides; Neutron scat- tering: Optical vibration; Vibration spectrum; Cold neutrons; 9506.

Frequency: Superposition; Crystal; Structure: Patterson: Vector; Symmetry: Consistency: J. 70A 4-407, 319-321 (1966).

Frequency and time standards: Standards: Standard time scales: Atomic frequency standards: Atomic time; Cesium atomic

beam; 9387.

Frequency range; Magnetic core; Permeability techniques:

9796.

Frequency range: Shaker; Vibration; Accelerometer; Calibration; Comparison calibration; 9306.

Frequency shift; Radiation field: Resonance: Thallium; Atomic

beam; TN346.

Frequency stability: Gage; High pressure: Self-excited pulse *

repetition: Temperature compensation; Ultrasonics; Velocity

of sound; Delay line; 9331

Frequency standards: Gas cells; Performance (long term): Reliability; Rubidium: Stability: Aging: Calibration (USES);

TN34].

Frequency translator; Phase shifter: Universal time: 9752.

Function: High pressure: «-hexane; Pressure; Three-terminal

electrode set; Clausius-Mossotti; Density: Dielectric constant: Dilatometer;/. 71A 4-460. 287-292 (1967).

152
Functional analysis: Metric spaces; Topology; Contractions; J. l\^2&3-202. 73-76 {1967).

Functional transforms: Generalized MacRobert's function;

Hankel transform, /C-transform; Laplace transform,

MacRobert's function; y-transform; Fourier-transform; 7. 71B

1-194, 23-37(1967).

Functions; Variables: Hermite-Fejer; Bernstein; Chebyshev;

Approximations: Convergence: Multidimensional; Polynomials;/. 70B 3-182,211-218(1966).

Function V(q); Harmonic oscillator: Matrix elements; Fourier

transform; 9420.

Fungicide; Latex: Mercury: Paint; Analysis; Colorimetric;

Dithizone; Paint film; 9431.

Fused salts; Magnetic fields; Molten metals; Solute distribution; Thermal convection; Crystal growth; 9513.- Fused silica: Infrared materials: Optical materials; Refractive in- dex; Dispersion: 9190. Future plans: National Standard Reference Data System; Objectives; Operation; Status; 9283.

G

G*; Representation-mixing; Sum-rules: Vector current: Axial-vector current: Chiral; d; 9353.

Ga: G*; Representation-mixing; Sum-rules; Vector current; Axial-vector current; Chiral; 9353.

GaAs lasers; Heat sink; Optical power; Aluminum-silicone

compound: 9467.

Gage; High pressure; Self-excited pulse repetition; Temperature

compensation; Ultrasonics: Velocity of sound; Delay line; Frequency stability; 9331

Gain; Measurement; Microwave; Mismatch errors; Rayleigh

distance; Standard gain horns: Antennas; Calibration; Comparison; Effective aperture; Electromagnetic horns; TN351

Gain fluctuations: Imperfect multiplier; Noise comparison; Nonidentical amplifiers; Sine-wave comparison signal; Correlation radiometer; Differential time delay; 7. 71C 2-253, 153-1 70

(1967).

Gallium arsenide; Germanium; P-n junctions; Radiative recombinafion: Silicon: Space charge regions; 9519.

Gallium arsenide; Lasers: Light emission; Surface effects: Tunnel diodes: Degradation; 9468.

Galvanic corrosion; Gypsum plaster; Aluminum conduit: Calci- um chloride: Concrete: Corrosion in concrete; Corrosion in plaster; Dissimilar metals; 9497.

Galvanic corrosion; Pitting: Pitting corrosion; Corrosion: Corrosion currents; Electroplating; 9490.

Gamma irradiation; Polymer degradation; Postirradiative decay;

Aqueous solution: Cross-linking; Dextran; Dextran

triacetate;/. 71A 1-433, 25-31 (1967).

Gamma radiation; Polymerization; Pressure; Poly-5 ,5,5 ,4,4,3 ,3-heptafluoropentene- 1 ; Poly-4,4,4,3 ,3 ,-pen- tafluorobutene-1 ; Poly-3,3,3-trifluoropropene: 9226.

Gamma-ray penetration theory; Neutron penetration theory;

Polynomial approximations; Biorthogonal functions; J. 71B

4-244, 197-211 (1967).

Gamma rays; Neutrons; Point source; Shielding; Single scatter; Air-scatter; Angular distribution: Energy spectrum: 9308.

Garnet; Low magnetic field effects: Permeability: Spin waves: Tensor permeability; YIG; External tensor permeability; Fer- rimagnetic resonance: Ferrites; 9395.

Gas; Oxygen atom; Oxidation; Population distribution; Rotation: Acetylene; CH; Chemiluminescence; Cross section; Emission spectrum; Energy transfer: Experimental: 9288.

Gas; Rate constants; Reactions; Tables: Activation energies;

Arrhenius equation; Bimolecular; Chemical kinetics; Data; NSRDS-NBS9.

Gas analysis; Mass spectrometric gas analysis: Microchemical

analysis; Polarographic analysis: Standard reference materials, analysis of; Stoichiometry; Atomic weights; Coulometric

analysis; TN403.

Gas analysis; Mass spectrometric gas analysis; Microchemical

analysis; Null-point potentiometry; Polarographic analysis;

Standard reference materials, analysis; Coulometric analysis:

TN425.

Gas bearings; Helium refrigeration; Performance: 9800 RPS:

200 Watts (30 °K): Design; Expansion turbine; 9151.

Gas cells; Performance (long term): Reliability; Rubidium; Stability; Aging; Calibration (USES); Frequency standards;

TN341.

Gases: Liquids; Metals: Solids; Thermal conductivity:

NSRDS-NBS8.

Gas meter; Heat transfer; Laminar flow: Meter calibration; Compressible flow; Flowmeter: 9390.

Gas phase; Hydrogen: Hydrogen deuteride; Insertion; Methane: Methyne; Rate; Vacuum ultraviolet; Acetylene:

Combination: Ethane; Ethylene: Flash photolysis; 9286.

Gas phase; Hydrogen atom; Hydroxyl-radical; Rate constant; Activation-energy; Atom-transfer reaction; Carbon dioxide;

Carbon monoxide; 9328.

Gas phase: Microwave; Microwave absorption; Molecular

beam; Permittivity; Refractive index; Spectroscopy; Dielectric constant; Electric dipole moments; NSRDS-NBSIO.

Gas phase; Photolysis: Solid phase; Vacuum ultraviolet; Car- bene; Ethylene; Ethylidene; 9415.

Gaussian: Quadrature: Integration: Mono. 98. Gaussian: Square: Trapezoidal: Triangular; Dispersion: Distributions: Folding; 9398.

Gaussian quadrature: Integral equations; Numerical integration;

Zeros of Legendre polynomials: J. 708 4-186, 249-256

(1966) . Generalized inverse; Inequality; Matrix;/. 71B 2&3-199, 61-64

(1967) . Generalized inverse; Matrix; EPr matrices; /. 718 2&3-198,

57-60(1967).

Generalized inverse: Matrix; Partial isometry; /. 718 2&3-200,

65-67(1967).

Generalized inverse; Matrix; Partial; Isometry; J. 718 4-247,

225-228(1967).

Generalized inverse; Symmetrizable matrix: J. 718 4-248,

229-231 (1967).

Generalized inversion curve; Joule-Thomson coefficient: Mixtures; Corresponding states: Cryogenic gases; 9456.

Generalized MacRobert's function; Hankel transform, A^-trans- fonn: Laplace transform, MacRobert's function; K-transform;

Fourier-transform; Functional transforms; J. 718 1-194, 23-37

(1967).

Generating function; Lattice model; Partition function; Random

walk; Adsorption; Chain polymer; Critical energy; J. 708

4-185, 237-247 (1966).

Generative grammar; Component combination; Phrase structure grammar; Linguistics; Frame embedding; Two-dimensional

languages; Chinese characters: Grammar; TN296.

Generator rank; Sylow subgroups: Bounds; Elementary abelian

groups ; 7. 71 8 4-25 1 , 24 7-248 (1967).

Genus: Modular group; Congruence groups; 9164.

Geomagnetic solar data; Solar data, geomagnetic; Data,

geomagnefic and solar; 9181

Geomagnetism; Rotation of the earth; Westward drift: Core-mantle coupling; Decade fluctuations; Dynamo theory:

Earth's core; TN358.

Geophysics; Gravity; Ionosphere; Seismology; 9274.

Germanium; Kronig-Kramers dispersion relations; Optical properties; Sum rules: Characteristic electron energy loss; Far ul- traviolet; 9345.

Germanium: P-n junctions; Radiative recombination; Silicon; Space charge regions; Gallium arsenide; 9519.

313-589 0-69— 11 153
Germanium; Ritz; Silicon; Spectrum; Standards: Ultraviolet; Vacuum; Wavelengths; Carbon; Copper; 9338.

Germanium resistor reproducibility; Low temperature ther- mometry; Reproducibility of germanium resistors; Thermal

cycling at low temperature; Thermometry; Germanium re- sistorsV. 70C 4-235, 245-254 (1966).

Germanium resistors; Germanium resistor reproducibility: Low

temperature thermometry; Reproducibility of germanium resistors; Thermal cycling at low temperature; Thermometry; 7. 70C 4-235. 245-254 {1966).

Germanium resistors; Thermometry; Calibration of germanium

resistors; J. 71C 1-441, 29-41 (1967).

Germanium spectra; Nitrogen spectra; Silicon i; Silicon spectra;

Vacuum ultraviolet standards; Atomic spectrum of silicon; Carbon spectra; Electrodeless discharge; 9337.

GeTe; Semiconductor; Superconducting energy gap; Tunnel

junction; 9409.

Geysering; Heat transfer to air condensing at 20 °K; Air collector; Air condensation; Air sampling: Air solidification at 20

°K; Cryodeposit; Cryodeposit surface temperature; Cryopumping; 9463.

Giant quadrupole resonances; Photons; Absorption: Collective

model; Cross section; Deformed nuclei; 9352.

Giant resonance; Nuclear hydrodynamics; Octupole deformation; Photon absorption; Quadrupole resonance: Deformed

nuclei; 9296.

Gibbs energy: Heat capacity; Low temperature calorimetry;

Thermodynamic properties; Beryllium 1 ;3-aluminate; Enthalpy: Entropy; J. 71A 1-429.3-8 (1967).

Ginzburg Landau theory; Indium lead alloys; Superconductivity; 9240.

Glass; Glass standard; Glass viscosity: Lead-silica glass;

Restrained sphere: Rotating cylinders: Standard: Standard

reference material; Viscosity; Viscosity standard; Beam bending; Fiber elongation; M260-1 1

Glass; Hydrostatic compression; Polarizability: Refractive in- dex: Annealing: Density; 9570.

Glass; Index of refraction: Relaxation times; Two-relaxation

time model; Volume relaxation; Annealing: Borosilicate crown glass:y. 7l.\3-456. 231-238 (1967).

Glass; Molten salts: Conductance: Diffusion; Electrodes; Electrolysis; 9408.

Glass electrodes; Medium effects; PH measurements: Acidity:

Analysis; Conductance measurements; Electrochemical analysis: Electrochemistry of solutions: TN423.

Glassformers: Immiscibility; Liquid immiscibility; Modifiers,

network; Oxide systems; Silicates: Borates: 9475.

Glass research: Glass technology; Properties of glass: 9437.

Glass standard; Glass viscosity; Lead-silica glass: Restrained

sphere: Rotating cylinders: Standard; Standard reference

material; Viscosity: Viscosity standard: Beam bending: Fiber

elongation: Glass: M260-1 1. Glass technology: Properties of glass; Glass research; 9437.

Glass transformation; Heat capacity calorimetry; Molecular

configurational state: Normal and supercooled liquid:

Quenched glass: Residual (configurational) entropy: Thermodynamic properties; Annealed glass; CrystahJ. ll\4-461,

293-305 (1967).

Glass viscosity; Lead-silica glass; Restrained sphere; Rotating

cylinders; Standard; Standard reference material; Viscosity:

Viscosity standard: Beam bending; Fiber elongation: Glass:

Glass standard: M260-11.

Gloss; Light: Perception of color: Photometry; Physiological

optics; Psychophysics: Scaling of color: Color: 9336.

Glucose; Glycerol; Mannitol; Melamine resin: Paper; Sucrose; Animal glue; 9455.

Glycerol; Mannitol; Melamine resin: Paper: Sucrose; Animal

glue; Glucose; 9455.

Gold; Spectrum of Au iii: Third spectrum: Corrections to analysis of Au iii;y. 70A 6-418,465-466 (1966).

Gomory algorithm; Integer programming; Linear inequalities;

Maximization; 7. 71B 4-24i, 187-195 (1967).

Government; Operations research; Systems analysis; Conference proceedings; M294.

Government standardization, U. S.; Specifications; Standardization activities, U. S.; Standards; Test methods; Certification and labeling plans; M288.

GPSS: Railroads: Scheduling; SIMSCRIPT; Simulation; Sorting; Freight operations; 9427

Grading: Interior; Moisture content; Overlay; Plywood; Shear

test; Vacuum and pressure test; Adhesives; Boil test; Bonding; Exterior; PSl-66.

Grain, abrasive; Micron: Overgrade; Sedimentation: Sieve;

Standard sieve; Abrasive grain; Accumulation curve; Coated

abrasive produdts;

Grain boundaries: Impurities; Sapphire; Aluminium oxide;

Dislocations: Electron microscopy; 9430.

Grain-crack; Mullen test; Burst of leather; Extension; 9466.

Grammar: Generative grammar; Component combination;

Phrase structure grammar; Linguistics: Frame embedding;

Two-dimensional languages; Chinese characters; TN296.

Graphic; Matroid: Binary; Bridge-separable; Even: J. 71B

4-245,213-214(1967).

Graphical solution; Hyperbolic character; Limiting values: Experimental: TN435.

Graphic arts; Photocomposition: Printing and publication; Auto- mated type composition: Computerized typesetting; Mono.

99. Graphite: Heat of combustion: Heat of formation; Hydrogen

fluoride aqueous: Teflon: Aluminum fluoride; Carbon

tetrafluoride: Fluorine; Fluorine bomb calorimetry; J. 71

2-440, 105-118 (1967).

Graphite; Spectral radiance; Spectroradiometer; Temperature;

Arc: Blackbody; 9326.

Graphite; W-s,,,: Absorbed dose; Calorimeter: Cavity ionization

chamber; Cobalt-60 gamma rays; Comparison: J. 71C 1-440,

19-27 (1967).

Graphite arc; Pyrometry; Standard; Temperature: 9346.

Graphs: Linear programming; Traveling salesman; Trees; Al- gorithms; Arborescences; Branchings; Combinatorics; 7. 71B

4-249, 233-240 (1967).

Graph theory; Network flows: Mathematics; Segs; Basic

cut-sets; Cut-sets;^. 718 4-242, 183-186 (1967).

Gravity; Ionosphere; Seismology; Geophysics; 9274.

Gravity; Specific density; 9167.

Grazing-incidence; 3-meter; Monochromator alignment; 0.06 A

resolution; Spectrograph; Synchrotron light; 9355.

Gregor Mendel: Isaac Todhunter: Anniversaries; History;

Probability: Statistics: Pierre de Fermat; 9156.

Gross heating value; Methane: Heating value; Heat of combustion: Reference material; TN299.

Group extension: Level: Modular group; Parabolic class number; Quotient surface; Split extension; Factor set; 9317.

Group representations; Normal matrices; Schur's lemma: Simul- taneous triangularization and diagonalization; Commuting

matrices: J. 71B 2&3-201, 69-71 (1967).

Groups: Representations: Free products; 9348.

Growth rate; Kinetics: Multicomponent; Steady-state; Composition; 9472.

Gruneisen's constant; Interferometer; Rutile; Thermal expansion; Anisotropic crystal: 7. l\K5-466. 363-369 (1967).

G value; K-band spectrometer; NiBra: Single crystal; Antifer- romagnetic; EPR: 9419.

Gypsum plaster; Aluminum conduit: Calcium chloride; Concrete; Corrosion in concrete; Corrosion in plaster; Dissimilar metals: Galvanic corrosion; 9497.

154
H

Halpern; Neutron; Photoneutron; Response; Yields; Detector;

Efficiency; Four-pi; TN416.

Hammett sigma constants; Ionization constants; pK values in ethanol-water; Sigma constants in ethanol-water; Substituted

benzoic acids; Allyl- and propenylbenzoic acids; Change of

pK] with dielectric constant; 7. 71 A 5-465. 379-384 (1967).

Handbook; Human factors; Legibility; Psychology; Readability;

Standards; Symbols; Type faces; Typography; Visibility;

Alphanumeric characters; Displays; M262-2.

Handlebody; Homeomorphism; Simply connected; Topology;

3- manifold; 3-sphere; Free group; J. 71B 2&3-197, 53-56

(1967).

Hankel transform, /^-transform; Laplace transform,

MacRobert's function; y-transform; Fourier-transform; Functional transforms; Generalized MacRobert's function; J. 71B

1-194,23-37(1967).

Hardboard; Ligno-cellulosic fibers; Lignin and hot pressed

fibers; Fiber board; CS251-63.

Hardening; Heat treatment; Ni-maraging steels; Normalizing;

Stainless steels; Structural steels; Surface hardening; Tempering; Tool steels; Annealing; Case hardening; Chemical composition; Mono. 88. Hardening; Shrinkage; Strain; Stress; Tensile; Adhesion; Bonding; Dental; Filling materials; 9433.

Hard spheres; Quantum statistics; Quantum virial coefficient; Second virial coefficient; 9282.

Harmonic oscillator; Matrix elements; Fourier transform; Function V(q); 9420.

Harmonic oscillators; Master equation; Nonequilibrium

processes; Nonlinear relaxation; Relaxation processes;

Stochastic processes; 9402.

Hayward notation; Information retrieval; Linear notation; Structures; Substructure searches; Chemical; Computers;

9482.

Hazards, electromagnetic radiation; Line, nonmetallic electrical transmission; Line, semiconducting plastic transmission; Meter, electric field-strength; Telemetry, novel form of; Device,

electroexplosive ordnance;^. 71C 1-443, 51-57 (1967).

Hazards, electromagnetic radiation; Line, non-metallic electrical transmission; Line, semi-conducting plastic transmission; Meter, electric field-strength; Telemetry, novel form of; Device,

electro-explosive ordnance; Field, near-zone electromagnetic;

TN345.

Hazards; Line; Meter; Telemetry; Device; Field; 9318.

HCFs photolysis; Infrared spectrum; Matrix isolation technique; CF2 reactions; CF3 free radical; CFsBr photolysis;

F atom reactions; 9368.

Hep metals; Surface structure; Field evaporation; Field ion microscopy; 9484.

He, He^; Inelastic scattering; Resonances; Scattering; Angular

difference; 9404.

He; He2; Metastable; Radiative; Spectra; Theory; Vacuum-ultraviolet; Atomic; Collisions; Continuous; Deexcitation;

9367.

Heat capacity; Low temperature calorimetry; Thermodynamic

properties; Beryllium 1 :3-aluminate; Enthalpy; Entropy;

Gibbsenergy;y. 71A 1-429,3-8 (1967).

Heat capacity; Magnetization curves; Semiconducting SrTiO:);

Superconducting SrTiOs; Critical fields; 9269.

Heat capacity calorimetry; Molecular configurational state; Normal and supercooled liquid; Quenched glass; Residual

(configurational) entropy; Thermodynamic properties; Annealed glass; Crystal; Diethyl phthalate; J. 71A 4-461,

293-305 (1967).

Heat conduction; Heat generation; Heat transfer; Neutron ab- sorption; Radioactive decay; Thermal conductivity; J. 71C

4-260, 293-298(1967).

Heat conductivity; Heat transfer; Iron; Lorenz function; Resistivity; Thermal conductivity; Armco iron; Conductivity;

Electrical conductivity; Electrical resistivity; J. 71C 4-259,

285-291 (1967).

Heat conductivity; Lorenz function; Platinum; Reference

material; Resistivity; Standard; Thermal conductivity; Conductivity; Electrical conductivity; Electrical resistivity; J. 71C

4-258,255-284(1967).

Heat flow; Interface; Kinetics; Morphology; Sphere; Stability;

Crystal growth; Diffusion; 9439.

Heat generation; Heat transfer; Neutron absorption; Radioactive decay; Thermal conductivity; Heat conduction; J. 71C

4-260,293-298(1967).

Heating; Voltage divider; Volt-box; Calibration; Errors; 9305.

Heating rate; Melting range; Melting temperature; Oriented;

Partial melting; Recrystallization; Rubber; Slow melting;

Stark rubber; Crystal size; Crystallized rubber; J. 1\K 3-455,

225-229 (1967).

Heating value; Heat of combustion; Reference material; Gross

heating value; Methane; TN299.

Heat of combustion; Heat of formation; Teflon; Aluminum

diboride; a-aluminum dodecaboride; Aluminum fluoride; Bomb calorimeter; Boron trifluoride; Fluorine; J . 71A 4-462,

307-315(1967).

Heat of combustion; Heat of formation; Hydrogen fluoride aqueous; Teflon; Aluminum fluoride; Carbon tetrafluoride; Fluorine; Fluorine bomb calorimetry; Graphite; J. 71A 2-440,

105-118(1967).

Heat of combustion; Polytetrafluoroethylene (Teflon); Refractory compounds; Aluminum borides; Boron; Boron carbide;

Carbon; Fluorine; 9270.

Heat of combustion; Reference material; Gross heating value; Methane; Heating value; TN299.

Heat of formation; Hydrogen fluoride aqueous; Teflon; Aluminum fluoride; Carbon tetrafluoride; Fluorine; Fluorine

bomb calorimetry; Graphite; Heat of combustion; J. 71A

2-440, 105-118(1967).

Heat of formation; Teflon; Aluminum diboride; a-aluminum

dodecaboride; Aluminum fluoride; Bomb calorimeter; Boron

trifluoride; Fluorine; Heat of combustion; J. 71A 4-462,

307-315 (1967).

Heat of formation; Teflon; Bomb calorimeter; Boron; Boron

trifluoride; Fluorine;^. 71A 3-451, 195-202 (1967).

Heat of reaction; Oxygen pressures; Silver oxide; Dissociation

by heat; Entropy; Equilibrium; 9377.

Heat of sublimation; Molecules; Potential functions; Empirical

and semi-empirical; Transport properties; Virial coefficients; Atoms; Compressibility; TN246.

Heat of vaporization; High temperature chemistry; Overestimation of standard deviation; Second law heat; Slope estimators;

Third law heat; Vapor pressure; Bias of least squares estimators; Coefficient of variation; 7. 10X6-424, 533-539, (1966).

Heat of vaporization; Hydrogen; Parahydrogen; Specific heat; Thermodynamic function; Density; 9246.

Heat sink; Optical power; Aluminum-silicone compound; GaAs

lasers; 9467.

Heats of formation; Ionization thresholds; Mass spectrometer;

Photoionization; Radicals; Rydberg levels; Vacuum

monochromators; Autoionization; Electronic; Excited states; H2O+; NH:,+ ;7. 70A 6-417, 459-463 (1966).

Heats of solution; Ion substitution; Lattice relaxation; Polarization energy; Shell calculations; Solid solutions; Alkali halides; 9300.

Heat transfer; Iron; Lorenz function; Resistivity; Thermal conductivity; Armco iron; Conductivity; Electrical conductivity;

Electrical resistivity; Heat conductivity; J. 71C 4-259,

285-291 (1967).

Heat transfer; Laminar flow; Meter calibration; Compressible

flow; Flowmeter; Gas meter; 9390.

155
Heat transfer; Neutron absorption; Radioactive decay; Thermal

conductivity; Heat conduction; Heat generation; J. 71C 4-260,

293-298(1967).

Heat transfer; Plane strain; Thermal stress; Yield stress; Elastic slress;J.70B4-l 88. 265-272 (1 966

)

. Heat transfer to air condensing at 20 °K; Air collector; Air con- densation; Air sampling; Air solidification at 20 °K; Cryodeposit; Cryodeposit surface temperature; Cryopumping; Cryopumping air at 20 °K in the transition pressure regime; 9463.

Heat treatment; Ni-maraging steels; Normalizing; Stainless

steels; Structural steels; Surface hardening; Tempering; Tool

steels; Annealing; Case hardening; Chemical composition;

Hardening; Mono. 88. Heavier elements; Literature survey; Refractory compounds;

Thermodynamic; Vaporization; Enthalpy; 9153.

Heavy water; Ionization constant; Isotope effects; Deuterium

oxide; 9440.

Heavy water; PD scale; Acetic acid; Acidity in deuterium oxide;

Deuterium oxide; Dissociation constant; 91 70. Helium afterglow; Recombination coefficient; Brush-cathode

plasma; Collisional-radiative recombination; 9371

Helium-methane; Low temperature; Phase-equilibrium;

Solid-vapor; Experimental; 9230.

Helium refrigeration; Performance; 9800 RPS; 200 Watts (30

°K); Design; Expansion turbine; Gas bearings; 9151.

Helium-3; Helium-4; Liquid; Mixtures; Osmotic pressure;

Quantum fluid; Specific heat; Thermodynamic properties;

Cryogenics; Dilution refrigerator; Enthalpy; Entropy;

Fermi-Dirac gas; TN362.

Helium-4; Liquid; Mixtures; Osmotic pressure; Quantum fluid; Specific heat; Thermodynamic properties; Cryogenics; Dilution refrigerator; Enthalpy; Entropy; Fermi-Dirac gas; Heli- um-3; TN362.

Hermite-Fejer; Bernstein; Chebyshev; Approximations; Convergence; Multidimensional; Polynomials; Functions; Variables;y.70B 3-182. 211-218(1966).

Heterogeneous nucleation; Vapor deposition; Critical nucleus;

Field-electron emission microscopy; 9483.

Hexadecapole; Hexadecapole transitions; Phonon interactions; Saturation factor; 4-3m symmetry; Angular dependence;

9357.

Hexadecapole; Induced; Nuclear; Transition; Ultrasonically;

9356.

Hexadecapole transitions; Phonon interactions; Saturation factor; 4-3m symmetry; Angular dependence; Hexadecapole;

9357.

Hexafluoropropylene; High pressure; Intrinsic viscosity; Radiation induced polymerization; Radiation intensity; Activation

enthalpy; 9257.

He-.; Metastable: Radiative; Spectra; Theory; Vacuum-ultraviolet; Atomic; Collisions; Continuous; Deexcitation; He;

9367.

HF; Noise; Satellite; Synchronization; Time and frequency dis- semination; VHF; VLF; TN357.

Hg on W; Nucleation; Electron field emission; 9457.

//-groups; Automorphic forms; Discontinuous groups; Fourier

exDansion;7. 718 4-239. 167-169(1967).

Higher symmetry; SU(3); SU(6)ii ; Baryon resonances; Classifi- cation; Decay widths; 9295

Higher symmetry scheme; \ quark content; Nonet of 2 + + mesons; Schwinger mass formula; SU(6)ii ; 405 representation; 9332.

High frequency; Inductive voltage divider; Ratio transformer; Attenuator; Bridge;y. nC 2-249. 101-109 (1967).

High frequency; Low frequency; Standard frequencies; Time

signals; Very low frequency; Broadcast of standard frequencies; M2i6, 1967 Edition.

High frequency; Low frequency; Standard frequencies; Time

signals; Very low frequency; Broadcast of standard frequencies; 9237.

High measurement accuracies: Human engineering; Volt boxes;

Calibration console; Console; 9184.

High precision determination of nickel; Simultaneous determination copper; Cobalt; "releasing agents" in flame emission and

atomic absorption; Magnesium; Ferrous SRMs; Stoichiometric mixtures uranium oxide; Isotope ratio determination;

TN402.

High precision 14 MeV neutron activation; Homogeneity

testing; Instrumentation; NBS Linac; NBS reactor; Photo- neutron reactions; Self absorption corrections; Standard

reference materials; Vanadium in irons and steels; Activation

analysis; Biological; Botanical samples; Carbon in sodium;

Cockroft-Walton generator; Digital computers; Flux monitors; TN428.

High pressure; Intrinsic viscosity; Radiation induced

polymerization; Radiation intensity; Activation enthalpy;

Hexafluoropropylene; 9257.

High pressure; Line broadening; Mossbauer spectroscopy;

Quadrupole splitting; Stannic oxide; 9206.

High pressure; «-hexane; Pressure; Three-terminal electrode

set; Clausius-Mossotti; Density; Dielectric constant; Dilatometer; Function; 7. 71 A 4-460, 287-292 (1967).

High pressure; Nickel; Tellurium; Ultrasonics; Compressibility;

Cylinder distortion; y. 71C 1-439. 11-17(1967).

High pressure; Resistance gage; Ultrasonics; Electrical connector; Feedthrough; 9526.

High pressure; Self-excited pulse repetition; Temperature compensation; Ultrasonics; Velocity of sound; Delay line; Frequency stability; Gage; 9331.

High pressure rate constant; Kinetics; Lifetime; Mass spectra;

Metastable molecules; Predissociation; Quantum mechanics;

Resonance scattering; Theoretical; Unimolecular dissociation; Activated complex; Activated molecules; Activated

state; Decay; 9366.

High resolution; Infrared; 1^3; Vibration-rotation; ^3; ^4; Band

contours; BF3; Coriolis force; Force fields; 9268.

High resolution; Spectrum; Vacuum ultraviolet; Absorption;

Carbon monoxide; Forbidden transition; 9330.

High-speed information transmission; Information storage and

retrieval; Numeric compression; Systems analysis; Alphanumeric compression; Information handling; TN413.

High strength steel; Hydrogen diffusion; Hydrogen embrittle- ment; Internal initiation; Stress corrosion; Boiling sodium

chloride solution; Delayed failure; 9478.

High temperature; Kinetics; Mass spectrometry; Nickel; Sur- face reaction; Fluorine; 9374.

High temperature; Mechanisms; Nonionic or ionic coreactants; Nuclear fluorine; Pentafluorohalobenzenes; Direct replace- ment; y.70A 6-420. 473-480(1966).

High-temperature alloys; Nitrogen; Nitrogen and ambient air; Spark excitation; Alloy, high-temperature; Ambient air; Ar- gon; Atmospheres of argon; 9235.

High-temperature calorimetry; Mixed oxides; Specific heat; Thermodynamic properties; Beryllium aluminate;

Chrysoberyl, drop calorimetry; Enthalpy measurements; J. 71A 2-438. 89-95 (1967).

High-temperature calorimetry; Mixed oxides; Specific heat; Thermodynamic properties; Beryllium aluminate (1:3); Drop

calorimetry: Enthalpy measurements; J. 71A 2-439. 97-103

(1967).

High-temperature calorimetry; Phase transition; Pretransition

phenomena; Specific heat; Thermodynamic properties; Aluminum trifluoride; Drop calorimetry, enthalpy measurements;

J. 11X3-450, 185-193 (1967).

156
High temperature chemistry; Overestimation of standard deviation; Second law heat; Slope estimators; Third law heat; Vapor pressure; Bias of least squares estimators; Coefficient

of variation; Correlated estimators; J. 70A 6-424, 533-539,

(1966) . High temperature reflectance; Infrared reflectance; Radiation

properties; Reflectance; Spectral emittance; Spectral

reflectance; Thermal radiation; Total emittance; Emissivity;

Emittance; TN292.

High temperatures; Deformation; Cold-drawing; Creep; Nickel

alloys; Duranickel; Nickel-aluminum precipitates; J. 70C

3-231, 195-205 (1966).

High temperatures; Transrotor engine; Platinum resistance; Dynamic analog correlation system; Combination metering

and safety valve; TN295.

High-voltage; Ratio; Safety; Standards enclosure; Transformer;

Voltage-divider; Voltmeter; Alternating-current; Calibration;

Direct-current; TN349.

High-voltage testing; Porcelain enamel; Porcelain enamel defects; Bubble structure; Continuity of coating; Corrosion re- sistance; 9223.

Hilbert matrices; Linear equations; Modular arithmetic; Exact

solutions;^. 71B 4-240, 1 71-1 79(1967).

History; Probability; Statistics; Pierre de Fermat; Gregor Mendel; Isaac Todhunter; Anniversaries; 9156.

HNF; HNF>; Infrared spectrum; Matrix isolation; NF; NF^;

Thermodynamic properties; Visible-ultraviolet spectrum; F

atom reactions; Force constants; 9335.

HNF2; Infrared spectrum; Matrix isolation; NF; NF2; Thermodynamic properties; Visible-ultraviolet spectrum; F atom

reactions; Force constants; HNF; 9335.

Homeomorphism; Simply connected; Topology; 3-manifold;

3-sphere; Free group; Handlebody; J. 71B 2&3-197, 53-56

(1967) . Homogeneity; Certified value; Eighteen cooperating laboratories; Vacuum fusion; Inert gas fusion; Oxygen; Ferrous stan- dard reference materials; CO by infrared absorbancy;

M260-14.

Homogeneity; Lithium content; Molecular weights; Polymer;

Preparation; Purity; Sampling; Standard sample; Volatile content; Ash content; Elemental analysis; J. 71A 1-435, 43-47

(1967).

Homogeneity testing; Instrumentation; NBS Linac; NBS

reactor; Photoneutron reactions; Self absorption corrections;

Standard reference materials; Vanadium in irons and steels; Activation analysis; Biological; Botanical samples; Carbon

in sodium; Cockroft-Walton generator; Digital computers;

Flux monitors; High precision 14 MeV neutron activation; TN428.

Homogeneity testmg; Pneumatic rabbit sensor; Mossbauer spec- troscopy; Tin standard for chemical shift; PARLORS pro- gram for Mossbauer spectra; Mossbauer instrumentation;

Mossbauer laboratories; Radiometric trace chromatography;

Radioisotope dilution; TN404.

Homogeneous anionic polymerization; Monodisperse,

polystyrene, poly-a-methylstyrene; Polyisoprene; Polybutad\ene;J.70A5-414, 421-433 (1966).

Homogeneous nucleation; Interfacial energy; Nucleation;

Polychlorotrifluoroethylene; Polyethylene; Polymers; Surface

free energy; Chain folding; Crystal growth; Crystallization

kinetics; 9454.

Homogeneous precipitation; .. :num; Beryllium; Thermoanalytical standards; Tricalcium silicate; Spectrophotometry; Antimony; High precision determination of

nickel; Simultaneous determination copper; Cobalt; TN402.

Hospital data communications; Laboratory; Nursing station; Pharmacy; Real-time hospital information system; Remote

data input; Administration; 9500.

Hot cathode vacuum gages; Ionization gages; Vacuum gage

calibration systems; Vacuum gages; Volumetric pressure

dividers; Bayard-Alpert gages; Cold cathode vacuum gages;

Conductance pressure dividers; TN298.

Hot electrons; Silicon diodes; Visible radiation; 9458.

Human engineering; Volt boxes; Calibration console; Console;

High measurement accuracies; 9184.

Human factors; Legibility; Psychology; Readability; Standards;

Symbols; Type faces; Typography; Visibility; Alphanumeric

characters; Displays; Handbook; M262-2.

Humidity; Polycarbonate; Polyethylene; Poly( 1 ,4-cyclohexylenedimethylene terephthalate); Polystyrene;

Poly(tetrafluoroethylene); Time; Reference specimens; Dielectric constant; Dissipation factor; Frequency; J. 71C

2-251, 119-125 (1967).

Humidity; Thin films; Vacuum; Adsorption; Barium fluoride; Electric hygrometer; 7. 71C 3-255, 199-207 (1967).

Hydrated salts; Hydrates; Hydrogen-bonding; Neutron scattering; Vibration spectra; Water librations; Cold neutrons; Coordination; 9505.

Hydrates; Hydrogen-bonding; Neutron scattering; Vibration

spectra; Water librations; Cold neutrons; Coordination;

Hydrated salts; 9505.

Hydration; Mixed solutions; Nonelectrolytes; Solvation;

Sucrose solutions; 9512.

Hydraulic; Hydrology; Naval hydrodynamics; M280.

Hydraulics; Inlets; Model tests; Culverts; 9243.

Hydrazoic acid; NH; Photolysis; Vacuum ultraviolet; Fluorescence; 9417.

Hydrazoic acid; Nitrous oxide; Photolysis; Energy transfer; Fluorescence; 9418.

Hydride; Nuclear magnetic resonance; Proton; Bond length;

Broad-line; Carbonyl; Cobalt; Cobalt tetracarbonyl hydride;

9449.

Hydride; Nuclear magnetic resonance; Proton; Bond lengths; Boron; Broad-line; Dimethoxyborane; 9450.

Hydrides; Isotope relations; Molecular constants; Absorption

spectroscopy; Alkali metal hydrides; 9276.

Hydrides; Isotope relations; Molecular constants; Absorption

spectroscopy; Alkali metal hydrides; 9277.

Hydrides; Isotope relations; Molecular constants; Absorption

spectroscopy; Alkali metal hydrides; 9278.

Hydrocarbons; Ion-molecule reactions; Radiolysis; 9273.

Hydrocarbons; Ion-molecule reaction; Isopentane; Photoionization; Photolysis; 9391.

Hydrogen; Equation of state; Statistical mechanics; Inter- molecular potential; Second virial coefficient; Quantum

mechanics; TN4I2.

Hydrogen; Hydrogen deuteride; Insertion; Methane; Methyne;

Rate; Vacuum ultraviolet; Acetylene; Combination; Ethane;

Ethylene; Flash photolysis; Gas phase; 9286.

Hydrogen; Instrument; Instrumentation; Liquefier; Liquid

hydrogen; Measurement; Nuclear spin relaxation time;

Ortho-para; Relaxation time; Ti; Analyzer; Cryogenics; 9486.

Hydrogen; Melting-line liquid densities; Orthobaric densities; Parahydrogen;y. 70A 6-425, 541-544 (1966).

Hydrogen; Parahydrogen; PKr-relations; Thermodynamic properties; Equation of state; 7. 71A i-452, 203-218 (1967).

Hydrogen; Parahydrogen; Specific heat; Thermodynamic function; Density; Heat of vaporization; 9246.

Hydrogen; Sonic velocity; Adiabatic compressibility; 9239.

Hydrogen atom; Hydroxyl-radical; Rate constant; Activation-energy; Atom-transfer reaction; Carbon dioxide;

Carbon monoxide; Gas phase; 9328.

Hydrogen atoms; Nitrogen atoms; Spin exchange cross sections; Spin relaxation time; Electron paramagnetic resonance; Flow

system kinetics; 9289.

157
Hydrogen-bonding; Neutron scattering; Vibration spectra;

Water librations; Cold neutrons; Coordination; Hydrated

salts; Hydrates; 9505.

Hydrogen bromide; Hydrogen chloride; Infrared; Rare gas

matrix; Spectrum; 9359.

Hydrogen chloride; Infrared; Rare gas matrix; Spectrum;

Hydrogen bromide; 9359.

Hydrogen deuteride; Insertion; Methane; Methyne; Rate; Vacuum ultraviolet; Acetylene; Combination; Ethane;

Ethylene; Flash photolysis; Gas phase; Hydrogen; 9286.

Hydrogen diffusion; Hydrogen embrittlement; Internal initia- tion; Stress corrosion; Boiling sodium chloride solution; Delayed failure; High strength steel; 9478.

Hydrogen embrittlement; Internal initiation; Stress corrosion;

Boiling sodium chloride solution; Delayed failure; High

strength steel; Hydrogen diffusion; 9478.

Hydrogen fluoride aqueous; Teflon; Aluminum fluoride; Carbon

tetrafluoride; Fluorine; Fluorine bomb calorimetry; Graphite;

Heat of combustion; Heat of formation; J. 71A 2-440, 105-118

(1967).

Hydrology; Naval hydrodynamics; Hydraulic; M280.

Hydromagnetic; Magnetosphere; Multicomponent; Pc 1 micropulsations; Plasma; Polarization; Propagation; Alfven;

Dispersion; TN342.

Hydrophobic bonding; Lateral aggregation; Native aggregation;

Temperature coefficient; Collagen; End-to-end bonding;

9436.

Hydrostatic balance; Hydrostatic weighing; Silicon density;

Substitution balance; Volumetric measurement; Water density; Water weighing; Air density; Balance; Balance calibration; Balance equilibrium; Balance sensitivity; J. 71C 3-254,

179-198(1967).

Hydrostatic compression; Polarizability; Refractive index; Annealing; Density; Glass; 9510.

Hydrostatic weighing; Silicon density; Substitution balance;

Volumetric measurement; Water density; Water weighing; Air

density; Balance; Balance calibration; Balance equilibrium;

Balance sensitivity; Density; J. 71C 3-254, 179-198 (1967).

Hydroxyapatite; Phosphate; Solubility isotherm; Calcium;

9212.

Hydroxyapatite; Piezoelectricity; Pyroelectricity; Tendon;

Bone; Collagen; 9470.

Hydroxyl-radical; Rate constant; Activation-energy;

Atom-transfer reaction; Carbon dioxide; Carbon monoxide;

Gas phase; Hydrogen atom; 9328.

Hydroxy! radicals; Electron spin resonance; Free radicals; Polyvinyl alcohol; Polyethylene oxide; Tetrahydrofuran;

9175.

Hyperbolic character; Limiting values; Experimental; Graphical

solution; TN435.

Hyperfine field; NMR; Nuclear interaction; Nuclear quadrupole

resonance; Thermal expansion; Ferromagnetism; 9219.

Hi, Hi-; Resonances; Vibrational excitation; Electron scattering; 9365.

Hi*; Electron; Dissociation; 9171.

H2CO; Magnetic hyperfine structure; RF transition; Zeeman effect; 9412.

H2O+; NH3+; NH2+; OH+ ions; Heats of formation; Ionization

thresholds; Mass spectrometer; Photoionization; Radicals;

Rydberg levels; Vacuum monochromators; Autoionization;

J.70X6-417, 459-463 (1966).

H2O; Ice; Inelastic scattering; K4Fe(CN)6-3H20; Librations;

Low-frequency modes; Neutron cross-sections; Neutron

spectra; Phase transition; Ferroelectrics; 9504.

I

Ice; Inelastic scattering; K4Fe(CN)6 • 3H2O; Librations;

Low-frequency modes; Neutron cross-sections; Neutron

spectra; Phase transition; Ferroelectrics; H2O; 9504.

Identification of solar lines; Molecules in sun; Solar spectrum;

Wavelengths of solar lines; Elements in sun; Equivalent

widths of solar lines; Mono. 61. Immiscibility; Liquid immiscibility ; Modifiers, network; Oxide

systems; Silicates; Borates; Glassformers; 9475.

Impact; Linear viscoelasticity; Partial differential equations;

Stress waves; Wave propagation; Characteristics; J. 70B

4-187, 257-264(1966).

Impedance; Measurements; Reflectometer; Microwave; J. 70C

3-227, 165-168(1966).

Imperfect multiplier; Noise comparison; Nonidentical amplifiers; Sine-wave comparison signal; Correlation radiometer;

Differential time delay; Gain fluctuations; J. 71C 2-253,

153-170(1967).

Imprecision; Law of error; Products; Propagation of error; Ran- dom; Ratio; Systematic; Sum; Approximation; Error; Formula; J. 70C 4-23 7. 263-2 73 (1966).

Impurities; Jump frequencies; Solute atoms; Vacancies; Correlation factors; Diffusion; Dilute alloys; 9464.

Impurities; Sapphire; Aluminium oxide; Dislocations; Electron

microscopy; Grain boundaries; 9430.

Incomplete block designs; Statistical experiment designs; Tour- naments; Weighing designs; Calibration; Calibration designs;

Combinatorial analysis; Difference sets; J. 71B 4-237,

149-160(1967).

Incompressible flow; Mass flow; Pressure drop; Compressible

flow; Flow comparison; Fluid flow; TN356.

Indefinite integrals; Bessel functions; 7. 71B 2&3-207, 131-141

(1967).

Indeterminates; Linear algebra; Matroids; Systems of distinct representatives; Term rank; Algorithms; Combinatorics; J. 71B4-250, 241-245 (1967).

Indexed; Flame; Spectroscopy; Analytical emission; Atomic ab- sorption; Electrical discharge; Bibliography; M281.

Index of refraction; Relaxation times; Two-relaxation time

model; Volume relaxation; Annealing; Borosilicate crown

glass; Glass;/. 71A 3-456, 231-238 (1967).

Indicators; Isopiestic; Vapor pressure; Methanol-water sol- vents; Thermodynamics; Acidity; Analytical chemistry; Conductance; Deuterium oxide; Dissociation processes; Elec- trochemistry; Electrolytes; Emf; TN400.

Indium lead alloys; Superconductivity; Ginzburg Landau

theory; 9240.

Indoor thermal environment; Insulated construction; Insulation

research; Thermal building design; Thermal insulation; Thermal performance standards; 9498.

Induced; Nuclear; Transition; Ultrasonically; Hexadecapole;

9356.

Inductance; Strip-transmission lines; Characteristic impedance;

y.71C 1-444,59-67 (1967).

Induction coil; Liquid hydrogen; Aluminum; Cryogenic magnet;

Energy storage; 9429.

Inductive voltage divider; Ratio transformer; Attenuator;

Bridge; High frequency;/. 71C 2-249, 101-109 (1967).

Inductive voltage divider; Measurement; Phase-angle; Standard;

Audio frequency; Thermal voltage converter; TN347.

Industrial design; Materials protection; Structural failure; Basic

and applied research; Economics of corrosion; 9351.

Industrial dynamics; Simulation; Tufted carpet mill; 9523.

Inelastic neutron scattering; Phosphonium iodide (PH4I); Barri- er to rotation; Electrostatic model; 9503.

Inelastic scattering; K4Fe(CN)6 • 3H2O; Librations; Lowfrequency modes; Neutron cross-sections; Neutron spectra;

Phase transition; Ferroelectrics; H2O; Ice; 9504.

Inelastic scattering; Metal hydrides; Neutron scattering; Optical

vibration; Vibration spectrum; Cold neutrons; Frequency;

9506.

Inelastic scattering; Resonances; Scattering; Angular difference; He, He-; 9404.

158
Inequalities; Norms; Wirtinger;^. 70B 3-184, 221-231 (1966).

Inequality; Matrix; Generalized inverse; J. 71B 2&3-199, 61-64

(1967).

Inert gas fusion; Oxygen; Ferrous standard reference materials; CO by infrared absorbancy; Homogeneity; Certified value; Eighteen cooperating laboratories; Vacuum fusion; M260-14.

Information handling; High-speed information transmission;

Information storage and retrieval; Numeric compression;

Systems analysis; Alphanumeric compression; TN413.

Information retrieval; Linear notation; Structures; Substructure

searches; Chemical; Computers; Hayward notation; 9482.

Information retrieval; Publication; Documentation; 9244.

Information storage and retrieval; Numeric compression;

Systems analysis; Alphanumeric compression; Information

handling: High-speed information transmission; TN413.

Infrared; Metals; Reflectance; Compilation; Cryogenic; TN348.

Infrared; Molecular structure; Spectra; Bond distances;

Cyanogen; 9183.

Infrared; V3\ Vibration-rotation; i-y, 1,^; Band contours; BFj;

Coriolis force; Force fields; High resolution; 9268.

Infrared; Osmium tetraoxide; Vibration-rotation; Coriolis constant; Force field; 9349.

Infrared; Rare gas matrix; Spectrum; Hydrogen bromide;

Hydrogen chloride; 9359.

Infrared absorption coefficients; Infrared emissivity;

Polycrystalline CaF2; Single-crystal CaF2; Calcium fluoride; Elevated-temperature emissivity; 9312.

Infrared absorption methods for analysis of carbohydrates;

Naturally occurring monosaccharides and 6-deoxy sugars; Oxidation of polycyclic aromatic hydrocarbons; Phenylhydrazono-phenylazo tautomerism; Quebrachitol, levo-inositol; Standard reference materials; TN427.

Infrared and far infrared optical pyrometry; Planck equation;

Rayleigh-Jeans equation; Spectral radiance; Wien equation;

Brightness temperature; Color temperature; Effective

wavelength; 9310.

Infrared emissivity; Polycrystalline CaF2; Single-crystal CaFj;

Calcium fluoride; Elevated-temperature emissivity; Infrared absorption coefficients; 9312.

Infrared integrating sphere coatings; Integrating spheres;

Sphere; Sulfur coatings; Coatings; 9157.

Infrared light; Light scattering; Mie Theory; Scattering functions; Cloud physics; 9228.

Infrared materials; Optical materials; Refractive index; Dispersion; Fused silica; 9190.

Infrared pyrometer; International Practical Temperature Scale; Optical pyrometer; Radiation thermometry; Standards; Temperature; 9343.

Infrared reflectance; Radiation properties; Reflectance; Spectral

emittance; Spectral reflectance; Thermal radiation; Total

emittance; Emissivity; Emittance; High temperature

reflectance; TN292.

Infrared reflectance; Spectral reflectance; Spectral emittance;

Specular reflectance; Averaging spheres; Diffuse reflectance; Emissivity; Emittance; Flux averaging devices; TN415.

Infrared spectra; Absorption spectra; Acyclic sugars; 1-acylamido sugars; Aldofuranoid sugars; Aldopyranoid su- gars; J. 71A J-437. 53-79 (1967).

Infrared spectra; Matrix-isolafion; Spectra; Vibrational assign- ment; Vibrational fundamentals; Chlorodifluoramine; 9294.

Infrared spectra; Modes of vibration; Molecular vibrational frequencies; Molecular spectra; Raman spectra; Data; Force

constants; NSRDS-NBSll.

Infrared spectra; Mono-, bis-, and tris-(phenylhydrazones);

Phenylazo compounds; Absorption spectra; J. 71A 4-459,

277-285 (1967).

Infrared spectra of acylamido derivatives; Carbohydrate

reference materials; Metallo-organic standard reference

materials; Air-pollution studies; Oxidation of polycyclic aromatic hydrocarbons; Sugars in solution; Conformational analysis; TN405.

Infrared spectrum; Matrix isolation; NF; NF2; Thermodynamic

properties; Visible-ultraviolet spectrum; F atom reactions; Force constants; HNF; HNF2; 9335.

Infrared spectrum; Matrix isolation technique; CF2 reactions; CFi! free radical; CF:)Br photolysis; F atom reactions; HCFd

photolysis; 9368.

Infrared spectrum; NCN free radical; Thermodynamic properties; Ultraviolet photolysis; Carbon atom production; Carbon

atom reactions; Cyanogen azide; Force constants; 9369.

Infrasonic waves; Thermal structure; Atmospheric resonances; Auroral infrasound; 9186.

Inherent computability; Matching; Probability master samples;

Propagation of error computations; Statistical standards; Automatic data processing equipment; Confidentiality audits; Disaggregation; Disclosure criteria; Federal statistical system; 9247.

Initial kinetic parameters; Non-isothermal kinetics; Polyethylene; Polymer degradation; Stability of polymers;

Thermogravimetry; Energy of activation; 9451

Initiation; Isolation; Naphthylidiene ring; Polyacrylonitrile;

Propagation; Cyanide groups; 9489.

Inlets; Model tests; Culverts; Hydraulics; 9243.

Innovafion; Long-time behavior; Performance standards; Accelerated tests; Bathtubs; External wall units; 9452.

Innovation; Preventive measures; Splitting failures; Thermal

shock; Built-up roof membrane; 9207.

Insertion; Isobutane; Isobutylidene; Photolysis; Vacuum ul- traviolet; 9414.

Insertion; Methane; Methyne; Rate; Vacuum ultraviolet; Acetylene; Combination; Ethane; Ethylene; Flash photolysis;

Gas phase; Hydrogen; Hydrogen deuteride; 9286.

Installation; Standards; Adhesive industrial; Characteristics;

Conductive; Flooring; 9177.

Instrument; Instrumentation; Liquefier; Liquid hydrogen; Measurement; Nuclear spin relaxation time; Ortho-para; Relaxation time; Ti; Analyzer; Cryogenics; Hydrogen; 9486.

Instrumentation; Interchangeability of parts; Mass production;

Standardization; Testing; Basic and applied research; Calibration; 9350.

Instrumentation; Isotopic analyses; Mass spectrometry;

Procedures; TN426.

Instrumentation; Liquefier; Liquid hydrogen; Measurement;

Nuclear spin relaxation time; Ortho-para; Relaxation time; Ti; Analyzer; Cryogenics; Hydrogen; Instrument; 9486.

Instrumentation; NBS Linac; NBS reactor; Photoneutron

reactions; Self absorption corrections; Standard reference

materials; Vanadium in irons and steels; Activation analysis;

Biological; Botanical samples; Carbon in sodium; CockroftWalton generator; Digital computers; Flux monitors; High

precision 14 MeV neutron activation; Homogeneity testing;

TN428.

Instrumentation; Procedures; Isotopic analysis; Mass spec- trometry; TN277.

Instrument design; Kossel camera; Kossel method; X-ray instru- mentation; Divergent x-ray beam; J. 71C 4-262, 313-318

(1967).

Insulated construction; Insulation research; Thermal building

design; Thermal insulation; Thermal performance standards;

Indoor thermal environment; 9498.

Insulation; Radiative cooling; Roofing, built-up; Deterioration;

9172.

Insulation conductance; Resistance; Dielectric resistance; Resistivity; Dielectric constant; Permittivity; Dissipation factor; Loss index; Dielectric strength; Arc resistance; Tracking;

Measurements; Electrical testing; Conductance; Dielectric

conductance; 97 74.

159
Insulation research; Thermal building design; Thermal insulation; Thermal performance standards; Indoor thermal en- vironment; Insulated construction; 9498.

Insulator; Magnetic susceptibility; Pauli paramagnetism;

Semiconductor; Strontium titanate; Bandstructure; 9453.

Integer programming; Linear inequalities; Maximization;

Gomory algorithm;/. 71B 4-243, 187-195 (1967).

Integra! equation; Scattering cross section; Slit correction;

Small-angle x-ray scattering; Distribution of intensity; 7. 70A

6-419.467-471 (1966).

Integral equations; Matrices; Asymptotic solutions; Error bounds;/. 70B 3-181. 187-210 (1966).

ntegral equations; Numerical integration; Zeros of Legendre

polynomials; Gaussian quadrature; J. 70B 4-186. 249-256

(1966).

ntegral transforms; Inversion formulas; Kernels; £-functions;

J. 71B 2&3-203. 77-89 (1967).

ntegrating sphere; Solar simulator; Spectroradiometer; Stan- dard of spectral irradiance; 9256.

ntegrating spheres; Sphere; Sulfur coatings; Coatings; Infrared

integrating sphere coatings; 9157.

ntegration; Gaussian; Quadrature: Mono. 98. ntegration; Mathematics; Monte-Carlo; Multiple integration;

Numerical analysis; Numerical integration; Quadrature; Analysis; 9321.

ntensities; Spectral lines; Ultraviolet; Atomic spectra; Mono.

32, Supplement.

nteraction; Isotropic; Strain; Stress; Continuum; Crystal; Defect; Dislocation; Displacement; 9445.

nteraction; Isotropic; Straight; Continuum; Crystal; Defect;

Dislocation; Energy; 9446.

nteraction of radiation; Radiation, charged particles; Charged

particles; Electrons and photons; 9250.

nteraction parameters; Palladium group; Theoretical; Third

spectra; Configurations 4d"+4d"-' 5s. energy levels; J. 70A

5-415.435-445^(1966).

nterchangeability of parts; Mass production; Standardization;

Testing; Basic and applied research; Calibration; Instrumentation; 9350.

nterface; Kinetics; Morphology; Sphere; Stability; Crystal

growth; Diffusion; Heat flow; 9439.

nterfacial energy; Nucleation; Polychlorotrifluoroethylene;

Polyethylene; Polymers; Surface free energy; Chain folding;

Crystal growth; Crystallization kinetics; Homogeneous

nucleation; 9454.

nterference; Photoionization; Ultraviolet; Diatomic molecule;

9293.

nterferometer; Lens aberrations; Prism interferometer; Testing

of lenses; 9231

nterferometer; Rutile; Thermal expansion; Anisotropic crystal;

Gruneisen's constant;/. 71A 5-466, 363-369 (1967).

Interior; Moisture content; Overlay; Plywood; Shear test; Vacuum and pressure test: Adhesives; Boil test; Bonding; Exterior; Grading; PSI-66.

Interior steel doors; Standard interior steel doors; Steel door

frames, steel doors, interior; PS4-66.

Intermediate phases; Nonstoichiometric phases; Osmium al- loys; Platinum alloys; Transition elements; Alloy phases;

Atomic ordering: A15-type phases: Chromium alloys; Elec- tron compounds; 9517.

Intermolecular potential function: fheory; Transport properties;

Correlation; Equilibrium properties; Experimental data; TN360.

Intermolecular potential; Second virial coefficient; Quantum

mechanics; Hydrogen; Equation of state; Statistical mechanics; TN412.

Internal friction: Lanthanum titanate; Phase change;

Resonance; Strontium titanate; Vacancies; Young's modulus;

9447.

Internal friction; Nickel-titanium alloy; Temperature dependence; Annealed specimens; Cold-worked specimens; Elastic moduli; 9511.

Internal initiation; Stress corrosion; Boiling sodium chloride

solution; Delayed failure: High strength steel; Hydrogen diffu- sion; Hydrogen embrittlement; 9478.

International and national standards activities; OESLA; Stan- dards-making bodies; Engineering standards; 9315.

International intercomparison; Microwave; Microwave power

measurement; 9188.

International Practical Temperature Scale; Optical pyrometer;

Radiation thermometry; Standards; Temperature; Infrared pyrometer: 9343.

International Practical Temperature Scale: Optical; Photoelectric pyrometer: Radiance sources: Standards: Temperature:

Blackbody; 9347.

International standards: Role of government; Role of private enterprise; Technology: World trade; Developing countries:

M284.

International system (SI); Conversion factors; Metric system;

H102.

International System (SI); Metric System; U. S. Customary

System: Weights and measures; Weights and measures ab- breviations; Weights and measures systems: Weights and measures units; Conversion tables: M286.

Interplanar angles; Physical properties; Scheelite structure; Single crystal: X-ray back-reflection: Calcium molybdate;

Crystal orientation; Crystallographic groups; /. 70A 5-410,

379-384(1966).

Interstitials; Point defects: Theory; Vacancies: Vibrational

states; Calculations: Electronic states, energies of formation;

Energies of motion: M287.

Intrinsic viscosity: Radiation induced polymerization: Radiation

intensity; Activation enthalpy; Hexafluoropropylene: High

pressure; 9257.

Inverses; Involutions; Real functions; J. 71B 1-192. 19-20

(1967).

Inversion formulas: Kernels; £-functions; Integral transforms;

J.71B2&3-203. 77-89(1967).

Inverting amplifiers; Laser beam phase shift: Laser heterodyning: Liquid metering pump; Optical refractive index; Pro- grammed document distribution: Relaxation oscillator: Rotatable document bin array; Seat belt webbing abrasion;

Abrasion resistance testing: TN437.

Involutions; Real functions: Inverses: J. 71B 1-192, 19-20

(1967).

Ion-exchange resin; Lanolin, soap; Borax; 9477.

Ionic crystals: Lattice sums; Point defects; Polarization; NaCl;

CsCl; CaFz; ZnS; Electric fields: 7. 71A 1-428, 1-2 (1967).

Ionization; Isotope effects; Thermodynamics; Weak elec- trolytes; Acetic acid-i/4; Acid-base; Deuterium oxide; Dissociation constants; Emf; 9492.

Ionization; Line intensity: Saha equilibrium; Spark; Spectrochemical analysis: Spectroscopic source; Arc; Boltzmann

equilibrium; Excitation: 9361

Ionization; Mass spectrometer; Molecule: NO2; NOa"^ N2O*;

Photoionization; Threshold: Ultraviolet; Vacuum; Dissociation; Fragment ions;/. 71A 5-467, 371-378(1967).

Ionization; Neutral; Rare earths; Series; Calculation; 9384.

Ionization constant; Isotope effects: Deuterium oxide; Heavy

water; 9440.

Ionization constants: pK values in ethanol-water; Sigma constants in ethanol-water; Substituted benzoic acids; Allyl- and

propenylbenzoic acids: Change of pK with dielectric constant: Hammett sigma constants:/. 71A 5-468. 379-384 ( 1967).

Ionization efficiency; Ion-molecule reactions: Ion-pair yields;

Photoionization: Superexcited molecule; Butane; 9272.

Ionization energy; Ion pair process; Photoionization; 9194.

160
Ionization gages; Vacuum gage calibration systems; Vacuum

gages; Volumetric pressure dividers; Bayard-Alpert gages;

Cold cathode vacuum gages; Conductance pressure dividers; Hot cathode vacuum gages; TN298.

Ionization thresholds; Mass spectrometer; Photoionization;

Radicals; Rydberg levels; Vacuum monochromators; Autoionization; Electronic; Excited states; H2O+; NH3+; NH^^;

OH^ J.l(S\6-4l7, 459-463 (1966).

Ion-molecule reaction; Isopentane; Photoionization; Photolysis;

Hydrocarbons; 9391

Ion-molecule reaction; Liquid phase photolysis; Liquid phase

radiolysis; 2-methylbutane; 3-methylpentane; 9392.

Ion-molecule reactions; Ion-pair yields; Photoionization; Su- perexcited molecule; Butane; Ionization efficiency; 9272.

Ion-molecule reactions; Radiolysis; Hydrocarbons; 9273.

Ion-molecules reactions; Neopentane; Photolysis; Radiolysis; Free radicals; 9180.

Ionosphere; Negative ions; Photo-detachment; Recombination;

D region; 9252.

Ionosphere; Seismology; Geophysics; Gravity; 9274.

Ionospheric absorption; Stratospheric warnings; Winter anomaly; Absorption, ionospheric; 9267.

Ionospheric disturbances; Polar cap absorption; Solar protons;

Sporadic-E; Auroral absorption; Auroral radar; 9193.

Ionospheric motions; Radiation sound; Sound waves;

Earthquakes, radiation sound; 9225.

Ion pair process; Photoionization; Ionization energy; 9194.

Ion-pair yields; Photoionization; Superexcited molecule; Butane; Ionization efficiency; Ion-molecule reactions; 9272.

Ion substitution; Lattice relaxation; Polarization energy; Shell

calculations; Solid solutions; Alkali halides; Heats of solution; 9300.

Iron, lifetimes in; Lifetimes in Fe i; Radiative lifetimes; Spectroscopy; Atomic spectra; Energy levels; Iron; J. 71A 6-472,

567-573(1967).

Iron; Iron, lifetimes in; Lifetimes in Fe i; Radiative lifetimes; Spectroscopy; Atomic spectra; Energy levels; J. 71A 6-472,

567-573(1967).

Iron; Iron oxide films; Kinetics; Passivity; Potentiostat; Anodic

oxidation; Ellipsometry; 9469.

Iron; Lorenz function; Resistivity; Thermal conductivity;

Armco iron; Conductivity; Electrical conductivity; Electrical

resistivity; Heat conductivity; Heat transfer; J. 71C 4-259,

285-291 (1967).

Iron; Oscillator strengths; Transition probability; Ultraviolet

lines of Fe i; Atomic spectra; 7. 70X4-409, 325-371 (1966).

Iron compounds; Optical Mossbauer spectrometer; Tandem

Mossbauer spectrometer; Velocity calibration; Mossbauer;

Spectroscopy; Standard; Differential chemical shift; Quadrupole splitting; Random error; Systematic error; Sodium

nitroprusside; M260-13.

Iron oxide films; Kinetics; Passivity; Potentiostat; Anodic oxidation; Ellipsometry; Iron; 9469.

Isaac Todhunter; Anniversaries; History; Probability;

Statistics; Pierre de Fermat; Gregor Mendel; 9156.

Isobutane; Isobutylidene; Photolysis; Vacuum ultraviolet; In- sertion; 9414.

Isobutane-dg; Ketene; Methylene; Photolysis; Abstraction;

9322.

Isobutylidene; Photolysis; Vacuum ultraviolet; Insertion; Isobutane; 9414.

Isoelectronic sequence; Praseodymium; Rare earth; Sliding

spark discharge lamp; Spectrum; Atomic energy levels; 7. 71

6-474, 583-585(1967).

Isolation; Naphthylidiene ring; Polyacrylonitrile; Propagation;

Cyanide groups; Initiation; 9489.

Isometry; Generalized inverse; Matrix; Partial; J. 71B 4-247,

225-228(1967).

Isopentane; Photoionization; Photolysis; Hydrocarbons;

Ion-molecule reaction; 9391

Isopiestic; Vapor pressure; Methanol-water solvents; Thermodynamics; Acidity; Analytical chemistry; Conductance;

Deuterium oxide; Dissociation processes; Electrochemistry;

Electrolytes: Emf; Indicators; TN400.

Isopiestic measurements; Vapor pressure; Calcium chloride; Mixed solufions; Activity coefficients; J. 70A 4-405, 305-311 (1966).

Isopiestic measurements; Mixed salt solutions; Sodium chloride; Vapor pressure of aqueous solutions; Calcium chloride; 7. 70A

4-406,313-318(1966).

Isothermally crystallized sample; Loss compliance; Loss modulus; Mechanical relaxation; Polychlorotrifluoroethylene;

Quenched sample; Storage modulus; Tan 5: Torsion pendulum; Varying crystallinities; Apparatus; 9441

Isotherms below 20 °K; Low temperature thermometry; Primary

thermometry; Speed of sound; Ultrasonic interferometer;

Acoustical thermometry; 9379.

Isotope effects; Deuterium oxide; Heavy water; Ionization constant; 9440.

Isotope effects; Mechanism of mutarotation; Mutarotation;

Pyranose-furanose interconversions; Sugars in solution; Acid-base catalysis in D2O; Deuterium isotope effects; D-fructose ; D-glucose ; 7 . 71 A 2-445, 137-148 (1967).

Isotope effects; Thermodynamics; Weak electrolytes; Acetic

acid-A; Acid-base; Deuterium oxide; Dissociation constants; Emf; Ionization; 9492.

Isotope ratio determination; Spectrophotometric titration; Controlled potential coulometric; Molybdenum; Homogeneous

precipitation; Aluminum; Beryllium; Thermoanalytical stan- dards; Tricalcium silicate; Spectrophotometry; Antimony;

TN402.

Isotope relations; Molecular constants; Absorption spectroscopy; Alkali metal hydrides; Hydrides; 9276.

Isotope relations; Molecular constants; Absorption spectroscopy; Alkali metal hydrides; Hydrides; 9277.

Isotope relations; Molecular constants; Absorption spectroscopy; Alkali metal hydrides; Hydrides; 9278.

Isotopes; Nuclear physics; Photonuclear reactions; Bibliography; Data index; Elements; M277, Supplement 1. Isotopic abundances; Magnesium; Absolute ratios; Atomic

weight; 7. 70A 6-416, 453-458(1966).

Isotopic analyses; Mass spectrometry; Procedures; Instrumentation; TN426.

Isotopic analysis; Mass spectrometry; Instrumentation;

Procedures; TN277.

Isotopic impurities; Local mode frequencies; Nearest-neighbor

interaction; Substitutional impurity; U-centers; Alkali halide

crystal; Born-Mayer potential; Deformation dipole model; Ef- fective force constants; 9354.

Isotopic laser wavelengths; Non-isotopic laser wavelengths;

9199.

Isotropic; Straight; Continuum; Crystal; Defect; Dislocation;

Energy; Interaction; 9446.

Isotropic; Strain; Stress; Continuum; Crystal; Defect; Dislocation; Displacement; Interaction; 9445.

J

Jacobi matrices; Triple diagonal matrices; Chains; Cycles;

J. 71B4-246, 215-224 (1967).

Jahn-Teller effect; Polarized ultraviolet spectrum;

Tetrachlorocuprate ion; Copper doped tetrachlorozincate;

E.p.r. analysis; 9/9/.

Joining factors; Mathieu's equation; Characteristic values; Coefficients; /I M559.

161
Joule-Thomson coefficient; Mixtures; Corresponding states; Cryogenic gases; Generalized inversion curve; 9456.

Journals; Publishing; Redacting; Abstracts; Editing; 9280.

Jump frequencies; Solute atoms; Vacancies; Correlation factors; Diffusion; Dilute alloys; Impurities; 9464.

Junction; Precision measurements; Ratio; Resistor; Four-ter- minal; Resistance decade; Transresistance; URS (universal

ratio set); VERt (versatile ratio instrument); DRRS (direct

reading ratio set); 7. IfSC 3-228, 169-172 (1966).

K

Kaolins; Surface area; Cation exchange capacity; Cone-plate

viscometer; Crystallinity; Flow properties; 9491

K-band spectrometer; NiBr2; Single crystal; Antiferromagnetic;

EPR;G value; 9419.

Kfi x-ray emission; Chlorinated molecular gases; Chlorine;

9473.

KCI-CdCU system; Molten salts; Calorimeter; Calorimetry;

Complex ion; Enthalpy determination; 9485.

Kernels; £-functions; Integral transforms; Inversion formulas;

J.71B2&3-203, 77-89(1967).

Ketene; Methylene; Photolysis; Abstraction; Isobutane-dg;

9322.

Kihara; Exp: 6, Morse; Potential functions; Dilute gases; Neon;

Krypton; Xenon; Transport coefficients; Correlations; M-6;

TN352.

Kihara; Exp: 6; Morse potential functions; Eucken correction;

Correlation; Dilute gases; Nitrogen; Oxygen; Transport coefficients; Lennard-Jones; TN350.

Kinetic; Nitric oxide; Surface; Surface diffusion; Tungsten;

Work function; Adsorption; Chemisorption; Desorption; Dissociation; Field emission microscopy; 9421.

Kinetics; Lifetime; Mass spectra; Metastable molecules; Predissociation; Quantum mechanics; Resonance scattering;

Theoretical; Unimolecular dissociation; Activated complex;

Activated molecules; Activated state; Decay; Dissociation;

9366.

Kinetics; Mass spectrometry; Nickel; Surface reaction; Fluorine; High temperature; 9374.

Kinetics; Morphology; Sphere; Stability; Crystal growth; Diffusion; Heat flow; Interface; 9439.

Kinetics; Multicomponent systems; «-paraffins; Pair distributions; Phase diagrams; Crystal growth; J. 71A 4-457, 245-259

(1967).

Kinetics; Multicomponent systems; Surface free-energy;

Chain-folded crystals; Crystal growth; J. 71X4-458, 261-275

(1967).

Kinetics; Multicomponent; Steady-state; Composition; Growth

rate; 9472.

Kinetics; Passivity; Potentiostat; Anodic oxidation; Ellipsometry; Iron; Iron oxide films; 9469.

Kinetics; Polymeric solids; Primary fracture front; Topography;

Brittle polymers; Fracture topography; 9487.

Kossel; Kossel sample preparation; Photographic contrast; Transmission of x rays; X-ray diffracfion; Divergent x-ray beams; 9521.

Kossel camera; Kossel method; X-ray instrumentation; Divergent x-ray beam; Instrument design; J. 71C 4-262, 313-318

(1967).

Kossel method; X-ray instrumentation; Divergent x-ray beam;

Instrument design; Kossel camera; J. 71C 4-262, 313-318

(1967).

Kossel sample preparation; Photographic contrast; Transmission of x rays; X-ray diffraction; Divergent x-ray beams; Kossel; 9521.

Kronig-Kramers dispersion relations; Optical properties; Sum

rules; Characteristic electron energy loss; Far ultraviolet; Germanium; 9345.

Krypton; Photoionization; Vacuum ultraviolet; Xenon; Atomic

spectra; 9208.

Krypton; Xenon; Transport coefficients; Correlations; M-6;

Kihara; Exp: 6, Morse; PotenUal functions; Dilute gases; Neon; TN352.

K4Fe(CN)6 • 3H2O; Librations; Low-frequency modes; Neutron

cross-sections; Neutron spectra; Phase transition; Ferroelectrics; H2O; Ice; Inelastic scattering; 9504.

L

Laboratory; Nursing station; Pharmacy; Real-time hospital in- formation system; Remote data input; Administration;

Hospital data communications; 9500.

Laboratory management; Measurements and standards; Measurement system; National Conference of Standards Laboratories; Proceedings, 1966 Standards Laboratory Conference;

Traceability; United States measurement system; Accuracy;

Calibrations; M291.

Laminar flow; Meter calibration; Compressible flow; Flowmeter; Gas meter; Heat transfer; 9390.

Lamp standard; Total irradiance; Blackbody; 9406.

Langmuir probe; Plasma; Spectrometric; Electron temperature;

9382.

Lanolin, soap; Borax; Ion-exchange resin; 9477.

Lanthanum titanate; Phase change; Resonance; Strontium

titanate; Vacancies; Young's modulus; Internal friction; 9447.

Laplace transform, MacRobert's function; F-transform;

Fourier-transform; Functional transforms; Generalized

MacRobert's function; Hankel transform, /^-transform; 7. 71B

1-194, 23-37(1967).

Large area detectors; Photonuclear physics apparatus; Scatter- ing chamber; Semiconductor detectors; Detector telescope;

9298.

Large-scale paper chromatography; Radioactive carbohydrates;

Use of heavy papers in preparative chromatography; Chromatography on seed-test paper; J. 71 A 1-436, 49-52 (1967).

Large-scale paper chromatography; Phenylhydrazono-phenylazo tautomerism; Cyclopentitols and related substances;

Unsaturated alditols; Infrared spectra of acylamido derivatives; Carbohydrate reference materials; Metallo-organic stan- dard reference materials; TN405.

Laser; Laser energy measurement; Optical attenuator; Photoelectric photometry; Radiometric calibration; Radiometry; TN418.

Laser; Radiation; Rotational level; Vibrational state; 337-micron CN laser; 9163. Laser beam phase shift; Laser heterodyning; Liquid metering

pump; Optical refractive index; Programmed document dis- tribution; Relaxation oscillator; Rotatable document bin ar- ray; Seat belt webbing abrasion; Abrasion resistance testing;

TN437.

Laser energy measurement; Optical attenuator; Photoelectric

photometry; Radiometric calibration; Radiometry; Laser; TN418.

Laser heterodyning; Liquid metering pump; Optical refractive index; Programmed document distribution; Relaxation oscillator; Rotatable document bin array; Seat belt webbing abrasion; Abrasion resistance testing; Automatic document dis- tribution; TN437.

Laser probe; Mass spectroscopy; Photographic photometry;

Plasma jet; Preconcentration; Pulse height analyzer; Spectrochemical analysis; Spectroscopy; Standard reference

materials; Time-shared computer; X-ray spectroscopy; Analysis; Arc temperature; TN401.

162
Lasers; Light emission; Surface effects; Tunnel diodes;

Degradation; Gallium arsenide; 9468.

Lateral aggregation; Native aggregation; Temperature coeffi- cient; Collagen; End-to-end bonding; Hydrophobic bonding;

9436.

Latex; Mercury; Paint; Analysis; Colorimetric; Dithizone; Paint

film; Fungicide; 9431

Lattice; Measurements; Powder-patterns; Reference-intensities;

Standard; Structure; X-ray diffraction; Constants; Crystal;

Mono. 25, Section 5. Lattice-bath; Neodymium ethylsulfate; Relaxation time; Spin

saturation; Electron static susceptibility; 9291

Lattice defects; Nuclear fuels; Nuclear science and technology;

Radiation damage; Reactor materials; Ceramics; M285.

Lattice dynamics; Lattice parameter changes; Single crystal ice; Speed of sound; Thermodynamic properties; Elastic constants; 9383.

Lattice model; Monte Carlo; Polymer chain dynamics; Relaxation; Simulation; Distribution; End-to-end length; 9514.

Lattice model; Partition function; Random walk; Adsorption;

Chain polymer; Critical energy; Generating function; J. 70B

4-185,237-247(1966).

Lattice parameter changes; Single crystal ice; Speed of sound;

Thermodynamic properties; Elastic constants; Lattice dynamics; 9383.

Lattice relaxation; Polarization energy; Shell calculations; Solid

solutions; Alkali halides; Heats of solution; Ion substitution; 9300.

Lattice sums; Point defects; Polarization; NaCI; CsCI; CaP-i; ZnS; Electric fields; Ionic crystals; J. 71A 1-428, 1-2 {1967).

Law of error; Products; Propagation of error; Random; Ratio;

Systematic; Sum; Approximation; Error; Formula; Imprecision; J. 70C 4-237, 263-273 (1966).

L-band cavity; Polycrystalline garnets; Tensor permeability;

Degenerate mode cavity; 7. 71C 1-445, 69-75(1967).

Lead molybdate; Single crystal; Calcium molybdate; Dielectric constant; 9434.

Lead-silica glass; Restrained sphere; Rotating cylinders; Stan- dard; Standard reference material; Viscosity; Viscosity stan- dard; Beam bending; Fiber elongation; Glass; Glass standard; Glass viscosity; M260-11

Leakage through valves; Predicting leak rates; Seal leakage;

Valve seat leakage; Leak detection; Leak flow rates; Leak

rates; TN355.

Leak detection; Leak flow rates; Leak rates; Leakage through

valves; Predicting leak rates; Seal leakage; Valve seat leakage;

TN355.

Leak flow rates; Leak rates; Leakage through valves; Predicting

leak rates; Seal leakage; Valve seat leakage; Leak detection;

TN355.

Leak rates; Leakage through valves; Predicting leak rates; Seal

leakage; Valve seat leakage; Leak detection; Leak flow rates; TN355.

Least squares technique; Thermal diffusivity of earth; Earth

temperature; y. 71C 1-442, 43-50 (1967).

Leather; Permeation; Water vapor permeability; Absorption,

water; Adsorption, water vapor; 9465.

Legibility; Psychology; Readability; Standards; Symbols; Type

faces; Typography; Visibility; Alphanumeric characters; Displays; Handbook; Human factors; M262-2.

Lennard-Jones; Kihara; Exp: 6; Morse potential functions;

Eucken correction; Correlation; Dilute gases; Nitrogen; Oxygen; Transport coefficients; TN350.

Lennard-Jones potential parameters; Virial coefficients; Water

vapor-air mixtures; Chemical association; J. 71A 3-454,

219-224(1967).

Lens aberrations; Prism interferometer; Testing of lenses; Inter- ferometer; 9231.

Lens design; Resolving power; Correlation; 9407.

Level; Modular group; Parabolic class number; Quotient sur- face; Split extension; Factor set; Group extension; 9317.

L-fuconic acid-/-'^C; L-fucose-/-'^C; Radioactive car- bohydrates; Synthesis of radioactive sugars;

Carbon- 14-labeled L-fucose; J. 71 A 2-444, 133-136(1967).

L-fucose-/-'^C; Radioactive carbohydrates; Synthesis of

radioactive sugars; Carbon- 14-labeled L-fucose; L-fuconic

ac\d-l-'^C:J. 11X2-444, 133-136 (1967).

Librations; Low-frequency modes; Neutron cross-sections;

Neutron spectra; Phase transition; Ferroelectrics; H2O; Ice; Inelastic scattering; K4Fe(CN)„-3H,0; 9504.

Liesegang rings; Periodic precipitation; Diffusion; M292.

Life cycling; Life testing; Pressure cycling; Pressure transducer;

Strain gage; TN434.

Life testing; Pressure cycling; Pressure transducer; Strain gage;

Life cycling; TN434.

Lifetime; Mass spectra; Metastable molecules; Predissociation;

Quantum mechanics; Resonance scattering; Theoretical;

Unimolecular dissociation; Activated complex; Activated

molecules; Activated state; Decay; Dissociation; High pres- sure rate constant; 9366.

Lifetime; Matrix isolation; Primary process; Decay; Flash

photolysis; 9396.

Lifetimes in Fe i; Radiative lifetimes; Spectroscopy; Atomic

spectra; Energy levels; Iron; Iron, lifetimes in; J. 71A 6-472,

567-573(1967).

Light; Perception of color; Photometry; Physiological optics;

Psychophysics; Scaling of color; Color; Gloss; 9336.

Light emission; Surface effects; Tunnel diodes; Degradation;

Gallium arsenide; Lasers; 9468.

Lightness; Munsell value; Reflectance; Contrast; Crispening;

9410.

Lights; Signal lights; Colors; Mono. 75. Light scattering; Mie Theory; Scattering functions; Cloud

physics; Infrared light; 9228.

Light-sensitive paper; Booklets of faded strips; Fading characteristics; Textiles; Fading standardization; M260-15.

Light sources; Time-resolved spectroscopy; Titanium; TiO;

Aluminum; AlH; AlO; Atomic spectra; Electrical discharges;

Exploding wires; 9292.

Lignin and hot pressed fibers; Fiber board; Hardboard; Lignocellulosic fibers; CS251-63.

Ligno-cellulosic fibers; Lignin and hot pressed fibers; Fiber

board; Hardboard; CS251-63.

Limiting values; Experimental; Graphical solution; Hyperbolic

character; TN435.

Line, nonmetallic electrical transmission; Line, semiconducting

plastic transmission; Meter, electric field-strength; Telemetry,

novel form of; Device, electroexplosive ordnance; Field, near-zone electromagnetic; 7. 71C 1-443, 51-57 (1967).

Line, non-metallic electrical transmission; Line, semi-conducting plastic transmission; Meter, electric field-strength;

Telemetry, novel form of; Device, electro-explosive

ordnance; Field, near-zone electromagnetic; Hazards, elec- tromagnetic radiation; TN345.

Line, semiconducting plastic transmission; Meter, electric field-strength; Telemetry, novel form of; Device, electroex- plosive ordnance; Field, near-zone electromagnetic; Hazards,

electromagnetic radiation; 7.710 7 -443, 51-57 (1967).

Line, semi-conducting plastic transmission; Meter, electric field-strength; Telemetry, novel form of; Device, electro-ex- plosive ordnance; Field, near-zone electromagnetic; Hazards,

electromagnetic radiation; Line, non-metallic electrical trans- mission; TN345.

Line; Meter; Telemetry; Device; Field; Hazards; 9318.

Lineality space; Linear programming; Algorithm; Cone; Convex

hull; Face; Frame;y. 71B 1-189. 1-7(1967).

163
Linear algebra; Matroids; Systems of distinct representatives;

Term rantc; Algorithms; Combinatorics; Indeterminates; J. 71B4-250, 241-245 (1967).

Linear equations; Modular arithmetic; Exact solutions; Hilbert

matrices; y.71B 4-240, 171-179(1967).

Linear inequalities; Maximization; Gomory algorithm; Integer

programming; 7. 71B4-24i, 187-195 (1967).

Linear notation; Structures; Substructure searches; Chemical;

Computers; Hayward notation; Information retrieval; 9482.

Linear polyethylene; Stress relaxation; Thermolytic chain scis- sion; Copolymer; Ethylene-propylene; 9264.

Linear programming; Algorithm; Cone; Convex hull; Face; Frame; Lineality space; 7. 71B /-/S9, 1-7(1967).

Linear programming; Traveling salesman; Trees; Algorithms;

Arborescences; Branchings; Combinatorics; Graphs; J. 71B

4-249, 233-240(1967).

Linear viscoelasticity; Partial differential equations; Stress waves; Wave propagation; Characteristics; Impact; J. 70B

4-187, 257-264(1966).

Line broadening; Mossbauer spectroscopy; Quadrupole

splitting; Stannic oxide; High pressure; 9206.

Line broadening; Plasma diagnostic techniques; Stark effect; Dense plasma; 9195.

Line intensity; Saha equilibrium; Spark; Spectrochemical analysis; Spectroscopic source; Arc; Boltzmann equilibrium; Excitation; Ionization; 9361

Linguistics; Frame embedding; Two-dimensional languages;

Chinese characters; Grammar; Generative grammar; Component combination; Phrase structure grammar; TN296.

Linguistic work; Mechanical translation system; Morphological

classification; Translation system; 9205.

Liquefier; Liquid hydrogen; Measurement; Nuclear spin relaxation time; Ortho-para; Relaxation time; Ti; Analyzer;

Cryogenics; Hydrogen; Instrument; Instrumentation; 9486.

Liquid; Mixtures; Osmotic pressure; Quantum fluid; Specific

heat; Thermodynamic properties; Cryogenics; Dilution

refrigerator; Enthalpy; Entropy; Fermi-Dirac gas; Helium-3;

Helium-4; TN362.

Liquid-applied coatings; Membrane movements; Prefabricated

sheets; Radiative cooling; Roofing research; Solar heating;

9432.

Liquid hydrogen; Aluminum; Cryogenic magnet; Energy

storage; Induction coil; 9429.

Liquid hydrogen; Measurement; Nuclear spin relaxation time;

Ortho-para; Relaxation time; Ti; Analyzer; Cryogenics;

Hydrogen; Instrument; Instrumentation; Liquefier; 9486.

Liquid immiscibility; Modifiers, network; Oxide systems; Sil- icates; Borates; Glassformers; Immiscibility; 9475.

Liquid immiscibility; Oxide systems; Phase diagram; Scandium

oxide; Boric oxide; 9476.

Liquid metering pump; Optical refractive index; Programmed

document distribution; Relaxation oscillator; Rotatable document bin array; Seat belt webbing abrasion; Abrasion re- sistance testing; Automatic document distribution; Flexible

tubing pump; TN437.

Liquid normal hydrogen; Parahydrogen; Shear viscosity; Temperature dependence; Viscosity of parahydrogen; 9201.

Liquid phase photolysis; Liquid phase radiolysis; 2-methylbutane; 3-methylpentane; Ion-molecule reaction; 9392.

Liquid phase radiolysis; 2-methylbutane; 3-methylpentane;

Ion-molecule reaction; Liquid phase photolysis; 9392.

Liquids; Metals; Solids; Thermal conductivity; Gases;

NSRDS-NBS8.

Liquids; Pycnometer; Density; 9360.

Literature survey; Refractory compounds; Thermodynamic;

Vaporization; Enthalpy; Heavier elements; 9153.

Lithium-compensated silicon; Semiconductor nuclear radiation detectors; Charge carrier lifetime; 9438.

Lithium content; Molecular weights; Polymer; Preparation; Purity; Sampling; Standard sample; Volatile content; Ash content; Elemental analysis; Homogeneity; J. 71 A 1-435, 43-47

(1967).

Lithium sulfate; Single crystals; Temperature gradient zone

melting; Traveling solvent; Calcium molybdate; Crystal

growth; 9496.

Local mode frequencies; Nearest-neighbor interaction; Substitutional impurity; U-centers; Alkali halide crystal; Born-Mayer

potential; Deformation dipole model; Effective force constants; Isotopic impurities; 9354.

Local thermal equilibrium; Oscillator strength (f-value); Optical

depth; Oxygen ii; Plasma; T-tube; Carbon ii; Coulomb ap- proximation; Electron density; Electron temperature;

Equivalent electrons; 9388.

Logic circuit; Low frequency; Measurements; Phase; Digital;

Phasemeter; 7. 71C i-257, 227-238(1967).

Long-time behavior; Performance standards; Accelerated tests; Bathtubs; External wall units; Innovation; 9452.

Loop-antenna field strength; Magnetic field-strength standard;

Mutual inductance of coaxial circular filaments; Near-zone

magnetic field; Transmitting loop antenna; J. 71C 4-263,

319-326(1967).

Lorenz function; Platinum; Reference material; Resistivity;

Standard; Thermal conductivity; Conductivity; Electrical conductivity; Electrical resistivity; Heat conductivity; J. 71C

4-258,255-284 (1967).

Lorenz function; Resistivity; Thermal conductivity; Armco

iron; Conductivity; Electrical conductivity; Electrical re- sistivity; Heat conductivity; Heat transfer; Iron; 7. 71C 4-259,

285-291 (1967).

Loss compliance; Loss modulus; Mechanical relaxation; Polychlorotrifluoroethylene; Quenched sample; Storage

modulus; Tan 6; Torsion pendulum; Varying crystallinities;

Apparatus; Isothermally crystallized sample; 9441

Loss index; Dielectric strength; Arc resistance; Tracking; Measurements; Electrical testing; Conductance; Dielectric con- ductance; Conductivity; Volume conductivity; Insulation con- ductance; Resistance; Dielectric resistance; Resistivity; 9174.

Loss modulus; Mechanical relaxation; Polychlorotrifluoroethylene; Quenched sample; Storage

modulus; Tan 6; Torsion pendulum; Varying crystallinities;

Apparatus; Isothermally crystallized sample; Loss compliance; 9441.

Lowering of steric repulsions; Polymeric anion; AH; AS:

Equilibria; Equilibrium concentration of monomer; a-trideu- teromethyl-/3,/3-dideuterostyrene; 9254.

Low frequency; Measurements; Phase; Digital; Phasemeter;

Logic circuit; 7. 71C 3-257, 227-238 ( 1967).

Low frequency; Standard frequencies; Time signals; Very low

frequency; Broadcast of standard frequencies; High frequency; M2i6, 1967 Edition.

Low frequency; Standard frequencies; Time signals; Very low

frequency; Broadcast of standard frequencies; High frequency; 9237.

Low-frequency modes; Neutron cross-sections; Neutron spectra; Phase transition; Ferroelectrics; H2O; Ice; Inelastic scat- tering; K4Fe(CN)6 • 3H..O; Librations; 9504.

Low magnetic field effects; Permeability; Spin waves; Tensor

permeability; YIG; External tensor permeability; Ferrimagnetic resonance; Ferrites; Garnet; 9395.

Low pressure measurement; Techniques of vacuum measure- ment; Vacuum index; Vacuum measurement; Bibliography;

Mono. 35, Supplement 1

Low temperature; Mechanical properties; Compilation; Copper;

Copper alloys; Mono. 101. Low temperature; Phase-equilibrium; Solid-vapor; Experimental; Helium-methane; 9230.

164
Low temperature; Recombination; Shockiey theory of e; Silicon radiation detectors; Trapping; Energy, required to create an

electron-hole pair; 9299.

Low temperature; Superconductivity; Bibliography; Compilation of data; Composition; Critical field; Critical temperature;

Crystallographic data; TN408.

Low temperature calorimetry; Thermodynamic properties;

Beryllium 1 :3-aIuminate; Enthalpy; Entropy; Gibbs energy;

Heat capacity;^. 71A 1-429, 3-8 {1967).

Low-temperature phase-equilibrium; Methane; Minimum gas phase equilibrium concentration; Neon; Neon-methane binary

system; Solid-vapor equilibrium; 9461.

Low temperature properties of materials; NBS cryogenic data

center; Thermodynamic and transport properties; Cryogenic

data center; Cryogenic fluids; 9255.

Low temperature scale; Magnetic thermometer; Cerous magnesium nitrate; 9334.

Low temperature thermometry; Reproducibility of germanium

resistors; Thermal cycling at low temperature; Thermometry;

Germanium resistors; Germanium resistor reproducibility; J. 70C 4-235,245-254 (1966).

Low temperature thermometry; Primary thermometry; Speed of

sound; Ultrasonic interferometer; Acoustical thermometry;

Isotherms below 20 °K; 9379.

\ quark content; Nonet of 2++ mesons; Schwinger mass formula;

SU(6)n ; 405 representation; Higher symmetry scheme; 9332.

M

Macroanalytical techniques; Optical emission; X-ray spec- trochemical analysis; Microanalytical techniques; Solids mass

spectrometer; Electron probe microanalyzer; NBS white cast

iron sample (SRM 1175); Stainless steel powder metallurgy

compact; M260-12.

Macroscopic equations of motion; Macroscopic variable; Non-equilibrium kinetic energy; Temperature; Total energy;

Bulk viscosity; 9313.

Macroscopic polarizability; Dielectric polarizability; Dipole moment; Fluid parahydrogen; 9248.

Macroscopic variable; Non-equilibrium kinetic energy; Temperature; Total energy; Bulk viscosity; Macroscopic equations of motion; 9313.

Magnesia; Measurement uncertainties; Spectral emittance;

Thermal radiation; Thoria; Zirconia; Alumina; Ceramic oxides; Emittance; Error sources; J. 70A 5-412. 393-415 (1966).

Magnesium; Absolute ratios; Atomic weight; Isotopic

abundances; y. 70A 6-416, 453-458 (1966).

Magnesium; Ferrous SRMs; Stoichiometric mixtures uranium

oxide; Isotope ratio determination; Spectrophotometric titra- tion; Controlled potential coulometric; Molybdenum;

Homogeneous precipitation; Aluminum; Beryllium; Thermoanalytical standards; TN402.

Magnetic constants; Molecular electronic structure; Orbital

energy; Polarizability; Quadrupole moment; Spectroscopic

constants; Ab initio electronic calculation; Dipole moment;

Dissociation energy; Electron affinity; Energy; Field gradient;

TN438.

Magnetic core; Permeability techniques; Frequency range;

9196.

Magnetic fields; Molten metals; Solute distribution; Thermal

convection; Crystal growth; Fused salts; 9513.

Magnetic field-strength standard; Mutual inductance of coaxial

circular filaments; Near-zone magnetic field; Transmitting

loop antenna; Loop-antenna field strength; J. 71C 4-263,

319-326 (1967).

Magnetic hyperfine structure; RF transition; Zeeman effect; HzCO;9412.

Magnetic spectrometer; Magneto-optics; Electron scattering;

9200.

Magnetic susceptibility; Pauli paramagnetism; Semiconductor;

Strontium titanate; Bandstructure; Insulator; 9453.

Magnetic thermometer; Cerous magnesium nitrate; Low temperature scale; 9334.

Magnetization; Magnetometer calibration; Measurement of

magnetization; Saturation magnetization; Vibrating-sample

magnetometer; Ferro- and ferrimagnetism; J. 70C 4-236,

255-262 (1966).

Magnetization curves; Semiconducting SrTiOs; Superconducting SrTiOs; Critical fields; Heat capacity; 9269.

Magnetoacoustic absorption; Potassium; Single crystals; Zone

refining; Fermi surface; 9797.

Magnetometer calibration; Measurement of magnetization;

Saturation magnetization; Vibrating-sample magnetometer;

Ferro- and ferrimagnetism; Magnetization; J. 70C 4-236,

255-262 (1966).

Magneto-optics; Electron scattering; Magnetic spectrometer;

9200.

Magnetosphere; Multicomponent: Pc 1 micropulsations;

Plasma; Polarization; Propagation; Alfven; Dispersion;

Hydromagnetic; TN342.

Magnet standards; Permanent magnet standards; Reference

magnets; Calibration, permanent magnet standards; 9245.

Management; Decision-making; Education; Operations

research; Quantitative analysis; TN414.

Mannitol; Melamine resin; Paper; Sucrose; Animal glue; Glucose; Glycerol; 9455.

Manometer; Micrometer; U-tube; Vacuum; Medium-vacuum

measurements; TN420.

Manometers; Mercury; Micrometer; Oil; U-tube; Vacuum measurement; Water; 9413.

Mass; Mechanisms; Nitrogen; Olefins; Rates; Spectrometry;

Atoms; 9329.

Mass flow; Mass flowmeters; Performance results; Propellant

management; Substitute fluid; Volume flow; Accuracy;

Calibration; Commodity transfer; Cryogenic; Cryogenic

processes; Density; Flowmeters; 9428.

Mass flow; Pressure drop; Compressible flow; Flow comparison; Fluid flow; Incompressible flow; TN356.

Mass flowmeters; Performance results; Propellant management;

Substitute fluid; Volume flow; Accuracy; Calibration; Commodity transfer; Cryogenic; Cryogenic processes; Density;

Flowmeters; Mass flow; 9428.

Mass measurement; Measurement; Measurement process;

Precision; Statistical control; Uncertainty; Accuracy; Mono.

103. Mass production; Standardization; Testing; Basic and applied

research; Calibration; Instrumentation; Interchangeability of

parts; 9350.

Mass spectra; Metastable molecules; Predissociation; Quantum

mechanics; Resonance scattering; Theoretical; Unimolecular

dissociation; Activated complex; Activated molecules; Activated state; Decay; Dissociation; High pressure rate constant; Kinetics; 9366.

Mass spectra; Photoionization; Rydberg; Threshold energies;

Autoionization; 1 ,2-dideuteroethylene; Ethylene; 9281.

Mass spectrometer; Molecule; NO2; NO2* N2O+; Photoionization; Threshold; Ultraviolet; Vacuum; Dissociation; Fragment ions; Ionization; J. 71A 5-467, 371-378 (1967).

Mass spectrometer; Photoionization; Radicals; Rydberg levels; Vacuum monochromators; Autoionization; Electronic;

Excited states; H2O+; NH.!+; NH2+; OH+ ions; Heats of for- mation;7. 70A 6-4/7, 459-463 (1966).

Mass spectrometric gas analysis; Microchemical analysis;

Polarographic analysis; Standard reference materials, analysis

of; Stoichiometry; Atomic weights; Coulometric analysis; Gas

analysis; TN403.

165
Mass spectrometric gas analysis; Microchemical analysis;

Null-point potentiometry; Polarographic analysis; Standard

reference materials, analysis; Coulometric analysis; Gas analysis; TN425.

Mass spectrometry; Instrumentation; Procedures; Isotopic analysis; TN277.

Mass spectrometry; Nickel; Surface reaction; Fluorine; High

temperature; Kinetics; 9374.

Mass spectrometry; Procedures; Instrumentation; Isotopic

analyses; TN426.

Mass spectroscopy; Photographic photometry; Plasma jet;

Preconcentration; Pulse height analyzer; Spectrochemical

analysis; Spectroscopy; Standard reference materials;

Time-shared computer; X-ray spectroscopy; Analysis; Arc

temperature; TN401.

Master equation; Moments; Probability distributions; Relaxation; Transition probabilities; Exponential relaxation; 9527.

Master equation; Nonequilibrium processes; Nonlinear relaxation; Relaxation processes; Stochastic processes; Harmonic

oscillators; 9402.

Matching; Probability master samples; Propagation of error computations; Statistical standards; Automatic data

processing equipment; Confidentiality audits; Disaggregation;

Disclosure criteria; Federal statistical system; Inherent computability; 9247.

Materials protection; Structural failure; Basic and applied

research; Economics of corrosion; Industrial design; 9351

Mat-formed particleboard; Particleboard requirements; Par- ticleboard, wood; Wood particleboard; CS236-66.

Mathematics; Matroids; Networks; Operations research; Optimization; Algorithms; Combinatorics; 9314.

Mathematics; Monte-Carlo; Multiple integration; Numerical

analysis; Numerical integration; Quadrature; Analysis; In- tegration; 9321.

Mathematics; Segs; Basic cut-sets; Cut-sets; Graph theory; Net- work flows; y. 71B 4-242, 183-186 (1967).

Mathieu's equation; Characteristic values; Coefficients; Joining

factors; .4 M559. Matrices; Asymptotic solutions; Error bounds; Integral equations; 7. 70B i-/S7, 187-210(1966).

Matrices; Norm bounds; Vector bounds; Volterra vector in- tegral equations; Asymptotic solutions; Eigenvalues; Error

term;y. 70B 3-180, 167-186 (1966).

Matrix; Block; Rank; Algorithm; 7. 70B 3-183, 219-220 (1966).

Matrix; EPr matrices; Generalized inverse; J. 71B 2&3-198,

57-60(1967).

Matrix; Generalized inverse; Inequality; J. 71B 2&3-199, 61-64

(1967).

Matrix; Orthogonal; Quaternions; Skew-symmetric; Regular

representation; Commutator; J. 71B 1-196, 43-46 (1967).

Matrix; Partial; Isometry; Generalized inverse; J. 71B 4-247,

'225-228 (1967).

Matrix; Partial isometry; Generalized inverse; J. 71B 2&3-200,

65-67 (1967).

Matrix elements; Fourier transform; Function V(q); Harmonic

oscillator; 9420.

Matrix isolation; NF; NF2; Thermodynamic properties;

Visible-ultraviolet spectrum; F atom reactions; Force constants; HNF; HNF2; Infrared spectrum; 9335.

Matrix isolation; Primary process; Decay; Flash photolysis;

Lifetime; 9396.

Matrix-isolation; Spectra; Vibrational assignment; Vibrational

fundamentals; Chlorodifluoramine; Infrared spectra; 9294.

Matrix isolation technique; CF2 reactions; CF3 free radical; CFaBr photolysis; F atom reactions; HCF3 photolysis; In- frared spectrum; 9368.

Matroid; Binary; Bridge-separable; Even; Graphic; J. 71B

4-245,213-214(1967).

Matroids; Networks; Operations research; Optimization; Al- gorithms; Combinatorics; Mathematics; 9314.

Matroids; Systems of distinct representatives; Term rank; Al- gorithms; Combinatorics; Indeterminates; Linear algebra; J. im 4-250, 241-245 (1967).

Maximization; Gomory algorithm; Integer programming; Linear

inequalities;y.71B 4-24i, 187-195 (1967).

Maximum stresses; Symmetrical bending; Symmetrically dis- tributed load; Theory; Circular plates; Concentric loading;

Design; Elasticity; Experiment; J. 71C 1-438, 1-10 (1967).

Mean stay time; Stefan problem; Surface concentration; Surface

self-diffusion; Whisker growth; Curtis approximation;

Dittmar-Neumann approximation; 9508.

Measurement, microwave voltages; Voltage, high-frequency,

calibration; Voltage measurements; Voltage Tee; Calibration,

high-frequency voltages; 9266.

Measurement; Measurement process; Precision; Statistical control; Uncertainty; Accuracy; Mass measurement; Mono. 103. Measurement; Microwave; Mismatch errors; Rayleigh distance;

Standard gain horns; Antennas; Calibration; Comparison; Ef- fective aperture; Electromagnetic horns; Gain; TN351

Measurement; Nuclear spin relaxation time; Ortho-para; Relaxation time; T,; Analyzer; Cryogenics; Hydrogen; Instrument;

Instrumentation; Liquefier; Liquid hydrogen; 9486.

Measurement; Phase-angle, Standard; Audio frequency; Thermal voltage converter; Inductive voltage divider; TN347.

Measurement; Ratio; Standards; Voltage; Volt box; Calibration;

Console; Electrical; 7. 70C 3-229,173-185 (1966).

Measurement of magnetization; Saturation magnetization;

Vibrating-sample magnetometer; Ferro- and ferrimagnetism;

Magnetization; Magnetometer calibration; J. 70C 4-236,

255-262 (1966).

Measurement process; Precision; Statistical control; Uncertainty; Accuracy; Mass measurement; Measurement; Mono. 103. Measurements; Electrical testing; Conductance; Dielectric con- ductance; Conductivity; Volume conductivity; Insulation con- ductance; Resistance; Dielectric resistance; Resistivity;

Dielectric constant; Permittivity; Dissipation factor; Loss in- dex; 9/74.

Measurements; Phase; Digital; Phasemeter; Logic circuit; Low

frequency;/. 710 3-257. 227-238 (1967).

Measurements; Powder-patterns; Reference-intensities; Stan- dard; Structure; X-ray diffraction; Constants; Crystal; Lattice; Mono. 25, Section 5. Measurements; Reflectometer; Microwave; Impedance; J. 70C

3-227, 165-168(1966).

Measurements; Resistance; Resistivity; Conductance; Conductivity; Dielectric; 9198.

Measurements; Standards; Tutorial; Microwave; Attenuation;

Mono. 97. Measurements and standards; Measurement system; National

Conference of Standards Laboratories; Proceedings, 1966

Standards Laboratory Conference; Traceability; United

States measurement system; Accuracy; Calibrations; M291.

Measurements at 0 °C; Nuclear quadrupole resonance ther- mometry; Potassium chlorate; J. 71A 2-442, 125-126 (1967).

Measurement standards; Properties of matter and materials; Engineering measurements and standards; M282.

Measurement system; National Conference of Standards

Laboratories; Proceedings, 1966 Standards Laboratory Conference; Traceability; United States measurement system;

Accuracy; Calibrations; Conferences, 1966 Standards

Laboratory; M291

Measurement uncertainties; Spectral emittance; Thermal radiation; Thoria; Zirconia; Alumina; Ceramic oxides; Emittance;

Error sources; Magnesia;/. 70A 5-4/2, 393-415 (1966).

Mechanical properties; Compilation; Copper; Copper alloys;

Low temperature; Mono. 101

166
Mechanical relaxation; Polychlorotrifluoroethylene; Quenched

sample; Storage modulus; Tan 6; Torsion pendulum; Varying

crystallinities; Apparatus; Isothermally crystallized sample;

Loss compliance; Loss modulus; 9441

Mechanical relaxation; Polychlorotrifluoroethylene;

Polyethylene; Polymer; Semicrystalline; Vacancy; Annealing;

Chain fold; Chain rotation; Chain twisting; Defect; Dielectric

relaxation; 9462.

Mechanical translation system; Morphological classification; Translation system; Linguistic work; 9205.

Mechanism of mutarotation; Mutarotation; Pyranose-furanose

interconversions; Sugars in solution; Acid-base catalysis in D2O; Deuterium isotope effects; D-fructose; D-glucose;

Isotope effects; y. 71A 2-445, 137-148 (1967).

Mechanisms; Nitrogen; Olefins; Rates; Spectrometry; Atoms;

Mass; 9329.

Mechanisms; Nonionic or ionic coreactants; Nuclear fluorine; Pentafluorohalobenzenes; Direct replacement; High temperature; J. 70A 6-420, 473-480 (1966).

Medium effects; PH measurements; Acidity; Analysis; Conductance measurements; Electrochemical analysis; Elec- trochemistry of solutions; Glass electrodes; TN423.

Medium-vacuum measurements; Manometer; Micrometer;

U-tube; Vacuum; TN420.

Melamine resin; Paper; Sucrose; Animal glue; Glucose;

Glycerol; Mannitol; 9455.

Melting-line liquid densities; Orthobaric densities; Parahydrogen;y. 70A 6-425, 541-544 (1966).

Melting point; Premelting; AI2O3; Dissociation; Environmental

cf{ects\J.71X4-463, 317-333 (1967).

Melting range; Melting temperature; Oriented; Partial melting;

Recrystallization; Rubber; Slow melting; Stark rubber;

Crystal size; Crystallized rubber; Heating rate; J. 71A 3-455,

225-229(1967).

Melting temperature; Oriented; Partial melting; Recrystallization; Rubber; Slow melting; Stark rubber; Crystal size; Crystallized rubber; Heating rate; Melting range; J. 71A

3-455, 225-229(1967).

Melting temperatures; Methyl surfaces; w-paraffins;

Polyethylene; Thermodynamic properties; Convergence temperature;y. 10X6-421,481-486(1966).

Membrane movements; Prefabricated sheets; Radiative cooling;

Roofing research; Solar heating; Liquid-applied coatings;

9432.

Mercury; Micrometer; Oil; U-tube; Vacuum measurement;

Water; Manometers; 9413.

Mercury; Optical constants; Refractive index; Surface films; Complex refractive index; Ellipsometry; 9509.

Mercury; Paint; Analysis; Colorimetric; Dithizone; Paint film; Fungicide; Latex; 9431

Mercury-silver alloys; Packing pressure; Particle size; Silver-tin alloys; Spherical alloy; Spherical-alloy amalgam; Adaptability; Amalgams; Dental amalgam; Dentistry; 9448.

Meson; Resonances; Spurious; Symmetry breaking; U(12)

theory; Baryon; Branching ratio; Decay; Decay width; 9166.

Metal hydrides; Neutron scattering; Optical vibration; Vibration

spectrum; Cold neutrons; Frequency; Inelastic scattering;

9506.

Metallo-organic standard reference materials; Air-pollution stu- dies; Oxidation of polycyclic aromatic hydrocarbons; Sugars

in solution; Conformational analysis; Carbon- 14- and

tritium-labeled carbohydrates; Large-scale paper chromatography; TN405.

Metals; Reflectance; Compilation; Cryogenic; Infrared; TN348.

Metals; Solids; Thermal conductivity; Gases; Liquids;

NSRDS-NBS8.

Metastable; Radiative; Spectra; Theory; Vacuum-ultraviolet;

Atomic; Collisions; Continuous; Deexcitation; He; He2;

9367.

Metastable molecules; Predissociation; Quantum mechanics;

Resonance scattering; Theoretical; Unimolecular dissociation; Activated complex; Activated molecules; Activated

state; Decay; Dissociation; High pressure rate constant;

Kinetics; Lifetime; 9366.

Meter, electric field-strength; Telemetry, novel form of; Device,

electroexplosive ordnance; Field, near-zone electromagnetic;

Hazards, electromagnetic radiation; Line, nonmetallic electri- cal transmission; y.71C 1-443. 51-57(1967).

Meter, electric field-strength; Telemetry, novel form of; Device,

electro-explosive ordnance; Field, near-zone electromagnetic;

Hazards, electromagnetic radiation; Line, non-metallic electri- cal transmission; Line, semi-conducting plastic transmission;

TN345.

Meter; Telemetry; Device; Field; Hazards; Line; 9318.

Meter calibration; Compressible flow; Flowmeter; Gas meter; Heat transfer; Laminar flow; 9390.

Methane; Heating value; Heat of combustion; Reference material; Gross heating value; TN299.

Methane; Methyne; Rate; Vacuum ultraviolet; Acetylene; Combination; Ethane; Ethylene; Flash photolysis; Gas phase;

Hydrogen; Hydrogen deuteride; Insertion; 9286.

Methane; Minimum gas phase equilibrium concentration; Neon;

Neon-methane binary system; Solid-vapor equilibrium;

Low-temperature phase-equilibrium; 9461

Methanol; w-nitrophenol; Nonaqueous solvents; Phenols; Thermodynamics; Dissociation; Electrolytes; J. 71A 1-430, 9-12

(1967).

Methanol-water mixtures; Solvent effects; Substituted phenols;

Dissociation constant; J. 70A 6-427, 553-556 (1966).

Methanol-water solvents; Thermodynamics; Acidity; Analytical

chemistry; Conductance; Deuterium oxide; Dissociation

processes; Electrochemistry; Electrolytes; Emf; Indicators;

Isopiestic; Vapor pressure; TN400.

Methanol-water solvents; Thermodynamics; Acid-base

equilibria; Aminopyridine; Dissociation constant; Electrolytic

dissociation; 9493.

Methylene; Photolysis; Abstraction; Isobutane-dg; Ketene;

9322.

Methyl surfaces; ^-paraffins; Polyethylene; Thermodynamic

properties; Convergence temperature; Melting temperatures;

J. 70A 6-42 1 , 481-486 ( 1 966 ). Methyne; Rate; Vacuum ultraviolet; Acetylene; Combination;

Ethane; Ethylene; Flash photolysis; Gas phase; Hydrogen;

Hydrogen deuteride; Insertion; Methane; 9286.

Metric spaces; Topology; Contractions; Functional analysis; J. nB2&3-202, 73-76(1967).

Metric system; International system (SI); Conversion factors; H102.

Metric System; U. S. Customary System; Weights and measures; Weights and measures abbreviations; Weights and measures systems; Weights and measures units; Conversion ta- bles; International System (SI); M286.

Metrology; Modern technology; Science comprehension; Space

age; 920i.

Microanalysis; X-ray spectrometry; Scanning electron microscopy; Electron backscatter; Cathodoluminescence;

Electron probe; TN278.

Microanalytical techniques; Solids mass spectrometer; Electron

probe microanalyzer; NBS white cast iron sample (SRM

1175); Stainless steel powder metallurgy compact; Optical

metallography; Macroanalytical techniques; Optical emission;

M260-12.

Microchemical analysis; Null-point potentiometry; Polaro- graphic analysis; Standard reference materials, analysis; Cou167
lometric analysis; Gas analysis; Mass spectrometric gas analysis; TN425.

Microchemical analysis; Polarographic analysis; Standard

reference materials, analysis of; Stoichiometry; Atomic

weights; Coulometric analysis; Gas analysis; Mass spec- trometric gas analysis; TN403.

Microfocus tubes; Microradiography; Nylon; Polyacrylonitrile;

Polyamides; Reflection of x-rays; Soft x-rays; X-rays; Fibers;

9488.

Micrometer; Oil; U-tube; Vacuum measurement; Water; Manometers; Mercury; 9413.

Micrometer; U-tube; Vacuum; Medium-vacuum measurements;

Manometer; TN420.

Micron; Overgrade; Sedimentation; Sieve; Standard sieve; Abrasive grain; Accumulation curve; Coated abrasive

products; Grain, abrasive; PS8-67.

Microphones; Standard; Calibration; 9342.

Microradiography; Nylon; Polyacrylonitrile; Polyamides;

Reflection of x-rays; Soft x-rays; X-rays; Fibers; Microfocus

tubes; 9488.

Microwave; Attenuation; Measurements; Standards; Tutorial; Mono. 97. Microwave; Impedance; Measurements; Reflectometer; J. 70C

3-227. 165-168(1966).

Microwave; Microwave absorption; Molecular beam; Permittivity; Refractive index; Spectroscopy; Dielectric constant;

Electric dipole moments; Gas phase; NSRDS-NBSIO.

Microwave; Microwave power measurement; International in- tercomparison: 9188.

Microwave; Mismatch errors; Rayleigh distance; Standard gain

horns; Antennas; Calibration; Comparison; Effective aperture; Electromagnetic horns; Gain; Measurement; TN351

Microwave; Noise source measurements; Radiometer;

Cryogenic noise source measurements; 9150.

Microwave; Perchlorylfluoride; Quadrupole coupling constant

structure; Dipole moment; 9204.

Microwave; Radiometer; Sensitivity; Switching; Dicke; 7.710

2-252, 127-152 (1967).

Microwave absorption; Molecular beam; Permittivity; Refractive index; Spectroscopy; Dielectric constant; Electric dipole

moments; Gas phase; Microwave; NSRDS-NBSIO.

Microwave electron tubes; Tabulation; Characteristics tabulation; Electron tubes; H104.

Microwave power measurement; International intercomparison;

Microwave; 9188.

Microwave spectrum; Structure; Dinitrogen trioxide; Equilibri- um; 9253.

Microwave spectrum; Structure; CF2; Dipole moment; Free

radical; 9380.

Microwave transmissions; Phase; Tracking; Atmospheric;

Distance measurements; Earth-to-space microwave transmissions; TN339.

Mie Theory; Scattering functions; Cloud physics; Infrared light; Light scattering; 9228.

Miller algorithm; Recurrence methods; Special functions;

Chebyshev series; Difference equations; Error analysis; J. im2&3-206, 1 1 1-129 (1967).

Miller algorithm; Recurrence relations; Special functions;

Chebyshev series; Difference equations; Error bounds; 7. 71B

4-238, 161-166(1967).

Minimum gas phase equilibrium concentration; Neon;

Neon-methane binary system; Solid-vapor equilibrium;

Low-temperature phase-equilibrium; Methane; 9461.

Mismatch errors; Rayleigh distance; Standard gain horns; Antennas; Calibration; Comparison; Effective aperture; Elec- tromagnetic horns; Gain; Measurement; Microwave; TN351.

Mixed oxides; Specific heat; Thermodynamic properties; Beryllium aluminate; Chrysoberyl. drop calorimetry; Enthalpy measurements; High-temperature calorimetry; 7. 1W2-438, 89-95

(1967).

Mixed oxides; Specific heat; Thermodynamic properties; Beryllium aluminate (1:3); Drop calorimetry; Enthalpy measurements; High-temperature calorimetry; J. 71A 2-439, 97-103

(1967).

Mixed salt solutions; Sodium chloride; Vapor pressure of aque- ous solutions; Calcium chloride; Isopiestic measurements; J. 70A 4-406, 313-318(1966).

Mixed solutions; Activity coefficients; Isopiestic measurements;

Vapor pressure; Calcium chloride; J. 70A 4-405, 305-311 (1966) . Mixed solutions; Nonelectrolytes; Solvation; Sucrose solutions; Hydration; 9512.

Mixing effectiveness; Square-edged orifice; Temperature measurement; Temperature pattern: Diameter ratio; BSS12.

Mixtures; Corresponding states; Cryogenic gases; Generalized

inversion curve; Joule-Thomson coefficient; 9456.

Mixtures; Osmotic pressure; Quantum fluid; Specific heat; Thermodynamic properties; Cryogenics; Dilution refrigerator; Enthalpy; Entropy; Fermi-Dirac gas; Helium-3;

Helium-4; Liquid; TN362.

w-nitrophenol; Nonaqueous solvents; Phenols; Thermodynamics; Dissociation; Electrolytes; Methanol; J. 71A 1-430, 9-12

(1967) . Model tests; Culverts; Hydraulics; Inlets; 9243.

Modern technology; Science comprehension; Space age; Metrology; 9203.

Modes of vibration; Molecular vibrational frequencies; Molecular spectra; Raman spectra; Data; Force constants; Infrared

spectra; NSRDS-NBSll.

Modifiers, network; Oxide systems; Silicates; Borates; Glassformers; Immiscibility; Liquid immiscibility; 9475.

Modular arithmetic; Exact solutions; Hilbert matrices; Linear

equations; y.71B 4-240, / 77-7 79(7967).

Modular group; Congruence groups; Genus; 9164.

Modular group; Normal subgroups; Parabolic classes; Congruence groups; 9375.

Modular group; Parabolic class number; Quotient surface; Split

extension; Factor set; Group extension; Level; 957 7. Modulation; Notation; Optical density; Propagance;

Reflectance; Reflectance factor; Symbols; Transmittance;

Transmittance factor; Absorptance; Contrast; 9373.

Modulators; Radio communications; Radio receivers; Transistors; TNIOO-A, Supplement to Appendix C ofTNlOO.

Modules; Nuclear instruments; Progress; Standards;

State-of-the-art; 9209.

Modulus rupture; Thermally tempered glass; Fracture mirror

size; 9227.

Moisture content; Overlay; Plywood; Shear test; Vacuum and

pressure test; Adhesives; Boil test; Bonding; Exterior; Grading; Interior; PSl-66.

Molecular; Vibrational; Frequencies; Data; Tables; Force; Constants; Spectral; NSRDS-NBS6.

Molecular beam; Permittivity; Refractive index; Spectroscopy;

Dielectric constant; Electric dipole moments; Gas phase;

Microwave; Microwave absorption; NSRDS-NBSIO.

Molecular complexity; Molecular thermodynamics; Prigogine's

cell theory; Thermodynamic properties; Three-parameter

theorem; Argon; 9386.

Molecular configurational state; Normal and supercooled liquid;

Quenched glass; Residual (configurational) entropy; Thermodynamic properties; Annealed glass; Crystal; Diethyl

phthalate; Glass transformation; J. 71.\ 4-461, 293-305

(1967).

Molecular constants; Absorption spectroscopy; Alkali metal

hydrides; Hydrides; Isotope relations; 9276.

168
Molecular constants; Absorption spectroscopy; Alkali metal

hydrides; Hydrides; Isotope relations; 9277

Molecular constants; Absorption spectroscopy; Alkali metal

hydrides; Hydrides; Isotope relations; 9278.

Molecular electronic structure; Orbital energy; Polarizability;

Quadrupole moment; Spectroscopic constants; m/7/o elec- tronic calculation; Dipole moment; Dissociation energy; Elec- tron affinity; Energy; Field gradient; Magnetic constants; TN438.

Molecular energy levels; Molecules; X-ray spectra; 9443.

Molecular spectra; Raman spectra; Data; Force constants; In- frared spectra; Modes of vibration; Molecular vibrational frequencies; NSRDS-NBSl I. Molecular structure; Negative hydroxy! ion; OD ions; OHions; Photodetachment; Cross section; Electron affinity;

9285.

Molecular structure; Spectra; Bond distances; Cyanogen; In- frared; 9183.

Molecular structure; Tetrahedral; Crystal structure; Dichloro( 1 ,10-phenanthroline)zinc; 9499.

Molecular thermodynamics; Prigogine's cell theory; Thermodynamic properties; Three-parameter theorem; Argon;

Molecular complexity; 9386.

Molecular vibrational frequencies; Molecular spectra; Raman

spectra; Data; Force constants; Infrared spectra; Modes of

vibration; NSRDS-NBSI I. Molecular weight average; Molecular weight distributions; Moments; Polydispersity; Polynomial representation; Sedimentation equilibrium; J. 71A 1-431, 13-17(1967).

Molecular weight distribufions; Moments; Polydispersity;

Polynomial representation; Sedimentation equilibrium;

Molecular weight average; 7. 71A 1-431, 13-17 (1967).

Molecular weights; Polymer; Preparation; Purity; Sampling;

Standard sample; Volafile content; Ash content; Elemental

analysis; Homogeneity; Lithium content; J. 71A 1-435, 43-47

(1967).

Molecule; Electron; Collision cross section; Atom; M289.

Molecule; NO2; NO2* N2O+; Photoionization; Threshold; Ultraviolet; Vacuum; Dissociation; Fragment ions; Ionization;

Mass spectrometer; J. 71A 5-467, 371-378 (1967).

Molecules; Potential functions; Empirical and semi-empirical;

Transport properties; Virial coefficients; Atoms; Compressibility; Heat of sublimation; TN246.

Molecules; X-ray spectra; Molecular energy levels; 9443.

Molecules in sun; Solar spectrum; Wavelengths of solar lines; Elements in sun; Equivalent widths of solar lines; Identifica- tion of solar lines; Mono. 61

Molten metals; Solute distribution; Thermal convecfion; Crystal

growth; Fused salts; Magnetic fields; 9513.

Molten salts; Calorimeter; Calorimetry; Complex ion; Enthalpy

determination; KCl-CdClo system; 9485.

Molten salts; Conductance; Diffusion; Electrodes; Electrolysis;

Glass; 9408.

Molybdenum; Homogeneous precipitation; Aluminum; Berylli- um; Thermoanalytical standards; Tricalcium silicate; Spectrophotometry; Antimony; High precision determination of

nickel; Simultaneous determination copper; Cobalt; TN402.

Moments; Polydispersity; Polynomial representation; Sedimentation equilibrium; Molecular weight average; Molecular

weight distribufions; 7. 71A 1-431, 13-17(1967).

Moments; Probability distributions; Relaxation; Transition

probabilities; Exponential relaxation; Master equation; 9527.

Momentum autocorrelation function; Statistical dynamics;

Statistical mechanics; Coupled harmonic oscillators; 9389.

Momentum correlation function; Statistical mechanics; Diffu- sion coefficients; 9376.

Mono-, bis-, and tris-(phenylhydrazones); Phenylazo compounds; Absorption spectra; Infrared spectra; J. 71A 4-459,

277-285 (1967).

Monochromator alignment; 0.06 A resolution; Spectrograph;

Synchrotron light; Grazing-incidence; 3-meter; 9355.

Monodisperse, polystyrene, poly-a-methylstyrene;

Polyisoprene; Polybutadiene; Homogeneous anionic polymerization; 7. 70A 5-¥/4, 42/-4iJ (1966).

Monte-Carlo; Multiple integration; Numerical analysis; Numerical integration; Quadrature; Analysis; Integration; Mathematics; 9321.

Monte Carlo; Polymer chain dynamics; Relaxation; Simulation;

Distribution; End-to-end length; Lattice model; 9514.

Morpholine; Morpholinium ion; Thermodynamic quantities; Bases; Dissociation constant; Emf measurements; 9460.

Morpholinium ion; Thermodynamic quantities; Bases; Dissociation constant; Emf measurements; Morpholine; 9460.

Morphological classification; Translation system; Linguistic

work; Mechanical translation system; 9205.

Morphology; Sphere; Stability; Crystal growth; Diffusion; Heat

flow; Interface; Kinetics; 9439.

Morse potential functions; Eucken correction; Correlation;

Dilute gases; Nitrogen; Oxygen; Transport coefficients; Lennard-Jones; Kihara; Exp: 6; TN350.

Mossbauer; Spectroscopy; Standard; Differential chemical shift; Quadrupole splitting; Random error; Systematic error; Sodium nitroprusside; Iron compounds; Optical Mossbauer spec- trometer; Tandem Mossbauer spectrometer; Velocity calibration; M260-13.

Mossbauer instrumentafion; Mossbauer laboratories; Radiometric trace chromatography; Radioisotope dilution; Substoichiometry by controlled potential coulometry;

Radiochemical separations; Theoretical detection limits for activation analysis; TN404.

Mossbauer instrumentation; Mossbauer spectroscopy; NBS

Linac; Nickel-61; PARLORS program for Mossbauer spectra; Photoneutron reaction; Solid state detectors; Standard

reference materials; Tin standard for chemical shift; Computers; Cross sections; TN421

Mossbauer laboratories; Radiometric trace chromatography;

Radioisotope dilution; Substoichiometry by controlled potential coulometry; Radiochemical separations; Theoretical de- tection limits for activation analysis; CLSQ program for multicomponent decay; TN404.

Mossbauer spectroscopy; Chemical structure analysis; 9444.

Mossbauer spectroscopy; NBS Linac; Nickel-61; PARLORS

program for Mossbauer spectra; Photoneutron reaction; Solid

state detectors; Standard reference materials; Tin standard for chemical shift; Computers; Cross sections; Detection limits for analysis; TN421.

Mossbauer spectroscopy; Quadrupole splitting; Stannic oxide;

High pressure; Line broadening; 9206.

Mossbauer spectroscopy; Quadrupole splitting; Sodium

nitroprusside; Standardization; Crystal structure; Differential chemical shift; 9238.

Mossbauer spectroscopy; Tin standard for chemical shift; PARLORS program for Mossbauer spectra; Mossbauer instrumentation; Mossbauer laboratories; Radiometric trace chromatography; Radioisotope dilution; Substoichiometry by controlled

potenfial coulometry; TN404.

Mullen test; Burst of leather; Extension; Grain-crack; 9466.

Multicomponent; Pc 1 micropulsations; Plasma; Polarization;

Propagation; Alfven; Dispersion; Hydromagnetic; Magnetosphere; TN342.

Multicomponent; Steady-state; Composition; Growth rate; Kinetics; 9472.

Multicomponent systems; ^-paraffins; Pair distributions; Phase

diagrams; Crystal growth; Kinetics; J. 71A 4-457, 245-259

(1967).

Multicomponent systems; Surface free-energy; Chain-folded

crystals; Crystal growth; Kinetics; J. 71A 4-458, 261-275

(1967).

313-589 0-69— 12 169
Multidimensional; Polynomials; Functions; Variables;

Hermite-Fejer; Bernstein; Chebyshev; Approximations; Convergence; J. 70B 3-182, 211-218 (1966).

Multiple integration; Numerical analysis; Numerical integration;

Quadrature; Analysis; Integration; Mathematics; Monte-Carlo; 9i2/.

Multiple reflections; Quarter-wave plate; EUipsometer; 9522.

Multiplet strength; Self-consistent field; Term values; Wavefunctions;y. '71X2-447, 157-162 (1967).

Multiplet table; Silicon; Spectrum, Si i; Wavelengths, Si i; Atomic energy levels; Atomic spectra Si i; First spectrum;

NSRDS-NBS3. Section 2. Multiplet tables; Rare-earth spectra; Spectra, far ultraviolet; Transition probabilities; Atomic spectra; 9210.

Munsell value; Reflectance; Contrast; Crispening; Lightness;

9410.

Mutarotation; Pyranose-furanose interconversions; Sugars in solution; Acid-base catalysis in D2O; Deuterium isotope ef- fects; D-fructose; D-glucose; Isotope effects; Mechanism of

mutarotation\J. 71A2-445, 137-148 (1967).

Mutual inductance of coaxial circular filaments; Near-zone magnetic field; Transmitting loop antenna; Loop-antenna field strength; Magnetic field-strength standard; J. 71C 4-263,

319-326(1967).

Mutual inductor; Stray magnetic field; Transformer; Auxiliary

generator; Bridge; Coaxial choke; J. 70C 4-233, 221-226

(1966).

M-6; Kihara; Exp: 6, Morse; Potential functions; Dilute gases;

Neon; Krypton; Xenon; Transport coefficients; Correlations;

TN352.

N

NaCl; CsCl; CaFa; ZnS; Electric fields; Ionic crystals; Lattice sums; Point defects; Polarization; 7. 71A 1-428, 1-2 (1967).

Naphthylidiene ring; Polyacrylonitrile; Propagation; Cyanide

groups; Initiation; Isolation; 9489.

National Conference of Standards Laboratories; Proceedings,

1966 Standards Laboratory Conference; Traceability; United

States measurement system; Accuracy; Calibrations; Conferences, 1966 Standards Laboratory; Foreign standards

laboratories; M291.

National electrical units; Nonmagnetic facility; Pellat dynamometer; Proton precession frequency; Absolute ampere

determination; Calculable inductor; Current balance; 9325.

National Standard Reference Data System; Objectives; Operation; Status; Future plans; 9283.

Native aggregation; Temperature coefficient; Collagen;

End-to-end bonding; Hydrophobic bonding; Lateral aggregafion; 9436.

Naturally occurring monosaccharides and 6-deoxy sugars; Oxidation of polycyclic aromatic hydrocarbons; Phenylhydrazono-phenylazo tautomerism; Quebrachitol, levo-inositol; Standard reference materials;

1 ,2-0-isopropylidene-/3-L-idofuranose; TN427.

Natural markings; Slabs; Slate; Standard sizes; Thickness;

Tolerances; Blackboards; Dimensions; PS2-66.

Natural rubber; Sulfur; Tetramethylthiuram disulfide; Vulcanization; Zinc dibutyldithiocarbamate; Zinc dimethyldithiocarbamate; Accelerators; Far infrared; J. 71A 1-432,

19-23 (1967).

Naval hydrodynamics; Hydraulic; Hydrology; M280.

NBS cryogenic data center; Thermodynamic and transport properties; Cryogenic data center; Cryogenic fluids; Low temperature properties of materials; 9255.

NBS Linac; Cockroft-Walton generator; Digital computers; Activation analysis; Standard reference materials; Photo-neutron

reactions; Flux monitors; Cu, Se, Al, V in irons and steels; Homogeneity testing; Pneumatic rabbit sensor; TN404.

NBS Linac; NBS reactor; Photoneutron reactions; Self absorption corrections; Standard reference materials; Vanadium in irons and steels; Activation analysis; Biological; Botanical

samples; Carbon in sodium; Cockroft-Walton generator;

Digital computers; Flux monitors; High precision 14 MeV

neutron activation; Homogeneity testing; Instrumentation;

TN428.

NBS Linac; Nickel-61; PARLORS program for Mossbauer

spectra; Photoneutron reaction; Solid state detectors; Stan- dard reference materials; Tin standard for chemical shift; Computers; Cross sections; Detection limits for analysis;

Flux monitors; TN421

NBS reactor; NBS Linac; Cockroft-Walton generator; Digital

computers; Activation analysis; Standard reference materials; Photo-neutron reactions; Flux monitors; Cu, Se, Al, V in irons

and steels; Homogeneity testing; Pneumatic rabbit sensor; TN404.

NBS reactor; Photoneutron reactions; Self absorption corrections; Standard reference materials; Vanadium in irons and

steels; Activation analysis; Biological; Botanical samples;

Carbon in sodium; Cockroft-Walton generator; Digital

computers; Flux monitors; High precision 14 MeV neutron

activation; Homogeneity testing; Instrumentation; NBS

Linac; TN428.

NBS white cast iron sample (SRM 1 175); Stainless steel powder

metallurgy compact; Optical metallography; Macroanalytical

techniques; Optical emission; X-ray spectrochemical analysis;

Microanalytical techniques; Solids mass spectrometer;

M260-12.

NCN free radical; Thermodynamic properties; Ultraviolet

photolysis; Carbon atom production; Carbon atom reactions;

Cyanogen azide; Force constants; Infrared spectrum; 9369.

Nearest-neighbor interaction; Substitutional impurity; U-centers; Alkali halide crystal; Bom-Mayer potential; Deformation

dipole model; Effective force constants; Isotopic impurities;

Local mode frequencies; 9354.

Near-zone magnetic field; Transmitting loop antenna; Loop-antenna field strength; Magnetic field-strength standard; Mutual

inductance of coaxial circular filaments; 7. 71C 4-263, 319-326

(1967).

Neel temperature; Shear modulus; Stainless steel; Antifer- romagnetic; Cold-work; Fe-Ni-Cr alloys; J. 70C 3-232,

207-210(1966).

Negative hydroxyl ion; OD- ions; OH" ions; Photodetachment;

Cross section; Electron affinity; Molecular structure; 9285.

Negative ions; Photo-detachment; Recombination; D region;

Ionosphere; 9252.

Neodymium ethylsulfate; Relaxation time; Spin saturation; Electron static susceptibility; Lattice-bath; 9291.

Neon; Krypton; Xenon; Transport coefficients; Correlations;

M-6; Kihara; Exp: 6, Morse; Potential functions; Dilute

gases; TN352.

Neon; Neon-methane binary system; Solid-vapor equilibrium;

Low-temperature phase-equilibrium; Methane; Minimum gas phase equilibrium concentration; 9461.

Neon-methane binary system; Solid-vapor equilibrium;

Low-temperature phase-equilibrium; Methane; Minimum gas phase equilibrium concentration; Neon; 9461.

Neopentane; Photolysis; Radiolysis; Free radicals; Ion-molecules reactions; 97^0.

Network flows; Mathematics; Segs; Basic cut-sets; Cut-sets; Graph theory; J. 71B 4-242, 183-186 (1967).

Networks; Operations research; Optimization; Algorithms;

Combinatorics; Mathematics; Matroids; 9314.

Neutral; Rare earths; Series; Calculation; Ionization; 9384.

Neutral atom; Promethium; Rare earth; Atomic spectroscopy;

Electronic energy levels; 7. 71A 6-475, 587-599 (1967).

Neutron; Photoneutron; Response; Yields; Detector; Efficien- cy; Four-pi; Halpern; TN416.

170
Neutron absorption; Radioactive decay; Thermal conductivity;

Heat conduction; Heat generation; Heat transfer; J. 71C

4-260,293-298(1967).

Neutron-activation; Tellurium; Chemical separation; Distilla- tion; 9169.

Neutron cross-sections; Neutron spectra; Phase transition; Ferroelectrics; H2O; Ice; Inelastic scattering; K4Fe(CN)ii • 3H2O; Librations; Low-frequency modes; 9504.

Neutron-induced cavitation; Radiation-induced cavitation; Threshold; Acoustic cavitation; Alpha-particle-induced

cavitation; Cavitation; Cavitation nucleus; Cavitation

threshold; Fission-induced cavitation; J. 71C 4-261 , 299-312

(1967).

Neutron penetration theory; Polynomial approximations;

Biorthogonal functions; Gamma-ray penetration theory; J. 11^4-244,197-211 (1967). Neutrons; Point source; Shielding; Single scatter; Air-scatter; Angular distribution; Energy spectrum; Gamma rays; 9308. Neutrons; Simultaneous; Three-circle; X ray; Diffraction; Dif- fractometer; 9524.

Neutron scattering; Optical vibration; Vibration spectrum; Cold

neutrons; Frequency; Inelastic scattering; Metal hydrides;

9506.

Neutron scattering; Vibration spectra; Water librations; Cold

neutrons; Coordination; Hydrated salts; Hydrates;

Hydrogen-bonding; 9505.

Neutron spectra; Phase transition; Ferroelectrics; H2O; Ice; In- elastic scattering; KjFeCCNjg • 3H2O; Librations; Lowfrequency modes; Neutron cross-sections; 9504.

Newton form; Polynomial; Relative error; Round-off; Evaluation; J. 71B 7-/9/, 11-17 (1967).

NF; NF2; Thermodynamic properties; Visible-ultraviolet spec- trum; F atom reactions; Force constants; HNF; HNF2; In- frared spectrum; Matrix isolation; 9335.

NF2; Thermodynamic properties; Visible-ultraviolet spectrum;

F atom reactions; Force constants; HNF; HNF2; Infrared spectrum; Matrix isolation; NF; 9335.

NH; Photolysis; Vacuum ultraviolet; Fluorescence; Hydrazoic

acid; 9417.

«-hexane; Pressure; Three-terminal electrode set; Clausius-Mossotti; Density; Dielectric constant; Dilatometer;

Function; High pressure; J. 11X4-460, 287-292 (1967).

NH2+; OH+ ions; Heats of formation; Ionization thresholds; Mass spectrometer; Photoionization; Radicals; Rydberg

levels; Vacuum monochromators; Autoionization; Electronic;

Excited states; H20+;y. lOA 6-4 17, 459-463 (1966).

NH;i+; NH2+; OH+ ions; Heats of formation; Ionization thresholds; Mass spectrometer; Photoionization; Radicals;

Rydberg levels; Vacuum monochromators; Autoionization;

Electronic; 7. 70A 6-417, 459-463 (1 966 ). Ni; Photoemission; Soft X-ray spectrum; Ag; Cu; Double elec- tron photoexcitation; 9442.

NiBr2; Single crystal; Antiferromagnetic; EPR; G value; K-band

spectrometer; 9419.

Nickel; Surface reaction; Fluorine; High temperature; Kinetics;

Mass spect'-ometry; 9374.

Nickel; Tellurium; Ultrasonics; Compressibility; Cylinder

distortion; High pressure; 7. 71C 1-439. 1 1-17 (1967).

Nickel alloys; Duranickel; Nickel-aluminum precipitates; High

temperatures; Deformation; Cold-drawing; Creep; J. 70C

3-231, 195-205 (1966).

Nickel-aluminum precipitates; High temperatures; Deformation; Cold-drawing; Creep; Nickel alloys; Duranickel; 7. 70C

3-231, 195-205(1966).

Nickel-titanium alloy; Temperature dependence; Annealed

specimens; Cold-worked specimens; Elastic moduli; Internal

friction; 9511.

Nickel-61; PARLORS program for Mossbauer spectra;

Photoneutron reaction; Solid state detectors; Standard

reference materials; Tin standard for chemical shift; Computers; Cross sections; Detection limits for analysis; Flux monitors; Mossbauer instrumentation; TN421.

Ni-Fe pitting; Corrosion rates, Ni-Fe alloys; Polarization

techniques; Polarization rate; Polarization resistance; Polarization circuits; y. 70C 3-230, 187-194 (1966).

Ni-maraging steels; Normalizing; Stainless steels; Structural

steels; Surface hardening; Tempering; Tool steels; Annealing;

Case hardening; Chemical composition; Hardening; Heat

treatment; Mono. 88. Niobium pentoxide; Phase equilibria; System; Tungsten triox- ide; Crystal structure; J. 70A 4-404, 281-303 (1966).

Nitric oxide; Nitrogen dioxide; Nitrosyl chloride; Vacuum ul- traviolet; Fluorescence; 9416.

Nitric oxide; Surface; Surface diffusion; Tungsten; Work function; Adsorption; Chemisorption; Desorption; Dissociation;

Field emission microscopy; Kinetic; 9421.

Nitrogen; Nitrogen and ambient air; Spark excitation; Alloys,

high-temperature; Ambient air; Argon; Atmospheres of argon;

High-temperature alloys; 9235.

Nitrogen; Olefins; Rates; Spectrometry; Atoms; Mass;

Mechanisms; 9329.

Nitrogen; Oxygen; Transport coefficients; Lennard-Jones;

Kihara; Exp; 6; Morse potential functions; Eucken correction;

Correlation; Dilute gases; TN350.

Nitrogen; Rhenium; Chcrnisorption; Field emission; 9340.

Nitrogen; Rhenium; Sticking coefficient; Surface coverage; Adsorption kinetics; 9394.

Nitrogen; Spectrum; Vacuum ultraviolet; Atomic spectrum;

Calculated wavelengths; 9339.

Nitrogen and ambient air; Spark excitation; Alloys, high-temperature; Ambient air; Argon; Atmospheres of argon;

High-temperature alloys; Nitrogen; 9235.

Nitrogen atoms; Spin exchange cross sections; Spin relaxation

time; Electron paramagnetic resonance; Flow system kinetics; Hydrogen atoms; 9289.

Nitrogen dioxide; Nitrosyl chloride; Vacuum ultraviolet; Fluorescence; Nitric oxide; 9416.

Nitrogen spectra; Silicon i; Silicon spectra; Vacuum ultraviolet standards; Atomic spectrum of silicon; Carbon spectra; Electrodeless discharge; Germanium spectra; 9337.

Nitrophenols; Substituted phenols; Dissociation constant; J. 11X5-469,385-389(1967).

Nitrosyl chloride; Vacuum ultraviolet; Fluorescence; Nitric oxide; Nitrogen dioxide; 9416.

Nitrous oxide; Photolysis; Energy transfer; Fluorescence;

Hydrazoic acid; 9418.

NMR; Nuclear interaction; Nuclear quadrupole resonance; Thermal expansion; Ferromagnetism; Hyperfine field; 9219.

NMR; Polysilanes; Silicon; Sub-halides; Boron; Fluorine; 922 9. Noise, signal; Photomultipliers; Signal noise ratio; Statistical properties; Time intervals; 9232.

Noise; Satellite; Synchronization; Time and frequency dis- semination; VHF; VLF; HF; TN357.

Noise comparison; Nonidentical amplifiers; Sine-wave comparison signal; Correlation radiometer; Differential time

delay; Gain fluctuations; Imperfect multiplier; J. 71C 2-253,

153-170(1967).

Noise source measurements; Radiometer; Cryogenic noise source measurements; Microwave; 9150.

Nomogram; Tripartite nomogram; 9364.

Nonaqueous solvents; Phenols; Thermodynamics; Dissociation;

Electrolytes; Methanol; w-nitrophenol; J. 71A 1-430, 9-12

(1967).

Non-blackbody emission; Optical radiation; Radiometry;

Sources; Spectral radiance; Blackbodies; 9344.

Nonelectrolytes; Solvation; Sucrose solutions; Hydration;

Mixed solutions; 9512.

171
Non-equilibrium kinetic energy: Temperature: Total energy:

Bulk viscosity: Macroscopic equations of motion: Macroscopic variable: 9313.

Nonequilibrium processes: Nonlinear relaxation: Relaxation

processes: Stochastic processes: Harmonic oscillators: Master equation: 9402.

Nonet of 2^' mesons: Schwinger mass formula: SU(6)ir: 405

representation; Higher symmetry scheme; k quark content; 9332.

Nonidentical amplifiers; Sine-wave comparison signal; Correlation radiometer: Differential time delay; Gain fluctuations: Imperfect multiplier: Noise comparison; J. 71C 2-253,

153-170(1967).

Nonionic or ionic coreactants; Nuclear fluorine; Pen- tafluorohalobenzenes; Direct replacement; High temperature;

Mechanisms; J. 70A 6-420, 473-480 (1966).

Nonisothermal kinetics: Polymers: Pyrolysis: Thermal decomposition: Thermogravimetry: Thermolysis; Stability of

polymer-: Degradation: 7. 70A 6-422, 487-523 (1966).

Non-isothermal kinetics: Polyethylene: Polymer degradation;

Stability of polymers: Thermogravimetry: Energy of activation; Initial kinetic parameters: 9451

Non-isotopic laser wavelengths: Isotopic laser wavelengths;

9199.

Nonlinear behavior: Polyisobutylene; Recovery; Stress: Relaxation: BKZ theory; Constant rate of strain; Creep; Elastic fluid;

J. 70A 6-423. 525-532 ( 1 966 ). Nonlinear optical phenomenon: Two-photon ionization; Atomic

calculations; 9323.

Nonlinear relaxation; Relaxation processes; Stochastic

processes; Harmonic oscillators: Master equation;

Nonequilibrium processes; 9402.

Nonmagnetic facility; Pellat dynamometer; Proton precession

frequency: Absolute ampere determination; Calculable inductor; Current balance; National electrical units; 9325.

Nonnegative matrices: Bounds: Eigenvalues: J. 71B 1-195. 39-41 (1967).

Nonstoichiometric phases; Osmium alloys; Platinum alloys;

Transition elements; Alloy phases; Atomic ordering;

A15-type phases: Chromium alloys: Electron compounds: In- termediate phases: 9517.

Normal and supercooled liquid: Quenched glass; Residual (configurational) entropy: Thermodynamic properties: Annealed

glass: Crystal: Diethyl phthalate: Glass transformation; Heat

capacity calorimetry : 7. 71A 4-461. 293-305 (1967).

Normalizing; Stainless steels; Structural steels; Surface hardening; Tempering: Tool steels: Annealing: Case hardening;

Chemical composition; Hardening: Heat treatment; Ni-maraging steels; Mono. 88. Normal matrices: Schur's lemma: Simultaneous triangulariza- tion and diagonalization: Commuting matrices: Group

representations'-y. 71B2cfei-20/, 69-71 (1967).

Normal subgroups; Parabolic classes; Congruence groups;

Modular group; 9375.

Norm bounds; Vector bounds; Volterra vector integral equations; Asymptotic solutions: Eigenvalues; Error term;

Matrices: y. lOB 3-180. 167-186 (1966).

Norms: Wirtinger: Inequalities; 7. 70B 3-184, 221-231 (1966).

Notation; Optical density; Propagance: Reflectance;

Reflectance factor; Symbols; Transmittance; Transmittance

factor; Absorptance; Contrast; Modulation: 93 73. NO2; NO2+ N2O-; Photoionization; Threshold; Ultraviolet; Vacuum: Dissociation: Fragment ions: Ionization; Mass spec- trometer: Molecule: 7. 71A 5-467, 371-378 (1967).

NO2" N20^; Photoionization: Threshold: Ultraviolet; Vacuum;

Dissociation; Fragment ions; Ionization; Mass spectrometer;

Molecule: N02;7. 71A 5-467, 371-378 (1967).

/!-paraffins; Pair distributions: Phase diagrams; Crystal growth;

Kinetics; Multicomponent systems; 7. 71A 4-457. 245-259

(1967).

/!-paraffins; Polyethylene: Thermodynamic properties; Convergence temperature: Melting temperatures; Methyl surfaces; 7. 70A 6-421.481-486 (1966).

Nuclear; Transition; Ultrasonically; Hexadecapole: Induced;

9356.

Nuclear alignment; Nuclear deformation: Optical model: Van de

Graaff: 14 MeV neutrons; '"''Ho; Black nucleus model;

Cryogenic target: Coupled-channel calculation: 9362.

Nuclear deformation; Optical model; Van de Graaff: 14 MeV

neutrons; '^-^Ho: Black nucleus model; Cryogenic target; Coupled-channel calculation; Nuclear alignment: 9362.

Nuclear fluorine: Pentafluorohalobenzenes; Direct replacement;

High temperature: Mechanisms: Nonionic or ionic coreactants;7. 70A 6-420.473-480 (1966).

Nuclear fuels; Nuclear science and technology; Radiation

damage; Reactor materials: Ceramics: Lattice defects; M285.

Nuclear hydrodynamics; Octupole deformation: Photon absorption; Quadrupole resonance; Deformed nuclei; Giant

resonance: 9296.

Nuclear instruments; Progress: Standards; State-of-the-art; Modules; 9209.

Nuclear interaction; Nuclear quadrupole resonance; Thermal

expansion: Ferromagnetism: Hyperfine field: NMR; 9279.

Nuclear magnetic resonance; Phonon nuclear interaction: Ultrasonics: Boxcar integrator; TN344.

Nuclear magnetic resonance: Proton: Bond length; Broad-line;

Carbonyl; Cobalt; Cobalt tetracarbonyl hydride; Hydride;

9449.

Nuclear magnetic resonance; Proton; Bond lengths; Boron;

Broad-line; Dimethoxyborane: Hydride: 9450.

Nuclear methods: Optical spectroscopy: Symposium on trace characterization: Trace characterization; X-ray spectroscopy;

Electrochemical methods: Electron and optical microscopy;

Mono. 100. Nuclear physics; Photonuclear reactions; Bibliography: Data in- dex; Elements: Isotopes: M277. Supplement 1

Nuclear physics; Photonuclear absorption cross sections: Spherical nuclei; Theoretical physics; 9274.

Nuclear quadrupole resonance thermometry: Potassium

chlorate; Measurements at 0 °C; 7. 71A 2-442, 125-126

(1967).

Nuclear quadrupole resonance; Thermal expansion: Ferromagnetism; Hyperfine field; NMR; Nuclear interaction: 927 9. Nuclear science and technology: Radiation damage: Reactor

materials: Ceramics; Lattice defects: Nuclear fuels: M285.

Nuclear spin relaxation time: Ortho-para: Relaxation time; Ti; Analyzer; Cryogenics; Hydrogen; Instrument: Instrumental

tion; Liquefier; Liquid hydrogen: Measurement: 9486.

Nucleation; Electron field emission: Hg on W: 9457.

Nucleation; Polychlorotrifiuoroethv lene: Polyethylene:

Polymers: Surface free energy; Chain folding; Crystal growth;

Crystallization kinetics: Homogeneous nucleation: Interfacial energy: 9454.

Null-point potentiometry: Polarographic analysis; Standard

reference materials, analysis; Coulometric analysis; Gas analysis; Mass spectrometric gas analysis; Microchemical analysis: rA'425.

Number of points; Calibration points; Complex laboratory-scale

model; Computer; Coordinate systems; Digital computer;

9202.

Numeric compression; Systems analysis; Alphanumeric compression: Information handling: High-speed information

transmission; Information storage and retrieval; TN413.

Numerical analysis; Numerical integration; Quadrature: Analysis: Integration; Mathematics: Monte-Carlo: Multiple integration; 9527.

172
Numerical integration; Propagation of error; Stability; Systems

of differential equations; 7. 71B 2&3-204. 91-103 (1967).

Numerical integration; Quadrature; Analysis; Integration;

Mathematics; Monte-Carlo; Multiple integration; Numerical

analysis; 9321

Numerical integration; Zeros of Legendre polynomials: Gaussian quadrature; Integral equations; J. 70B 4-186, 249-256

{1966).

Nursing station; Pharmacy; Real-time hospital information

system; Remote data input; Administration; Hospital data

communications; Laboratory; 9500. Nuts; Plastic; Plimbing equipment; Tanks; Valves; Bowls;

Brass; Dimensions; PS6-66.

Nylon; Polyacrylonitrile; Polyamides; Reflection of x-rays; Soft

x-rays; X-rays; Fibers; Microfocus tubes; Microradiography;

9488.

vs; Vibration-rotation; ^3; ^4; Band contours; BF3; Coriolis force; Force fields; High resolution; Infrared; 9268.

o

Objectives; Operation; Status; Future plans; National Standard

Reference Data System; 9283.

Octupole deformation; Photon absorption; Quadrupole

resonance; Deformed nuclei; Giant resonance; Nuclear

hydrodynamics; 9296.

OD ions; OH ions; Photodetachment; Cross section; Electron

affinity; Molecular structure; Negative hydroxyl ion; 9285.

OESLA; Standards-making bodies; Engineering standards; In- ternational and national standards activities; 9315.

OH+ ions; Heats of formation; Ionization thresholds; Mass

spectrometer; Photoionization; Radicals; Rydberg levels; Vacuum monochromators; Autoionization; Electronic;

Excited states; H2O+; NH;,+ ; J. 70A 6-417, 459-463 (1966).

OH" ions; Photodetachment; Cross section; Electron affinity;

Molecular structure; Negative hydroxyl ion; OD' ions; 9285.

Oil; U-tube; Vacuum measurement; Water; Manometers; Mercury; Micrometer; 9413.

Oil baths; Standard cells; Thermoelectric; Connector; Elec- tromotive force; TN353.

Olefins; Rates; Spectrometry; Atoms; Mass; Mechanisms;

Nitrogen; 9329.

Opalescence; X-transitions; Critical phenomena; Critical point;

Second order phase transition; Singularities; Pade approximate fluctuations; M273.

Operation; Status; Future plans; National Standard Reference

Data System; Objectives; 9283.

Operations research; Optimization; Algorithms; Combinatorics;

Mathematics; Matroids; Networks; 9314.

Operations research; Quantitative analysis; Management; Decision-making; Education; TN414.

Operations research; Systems analysis; Conference

proceedings; Government; M294.

Opponent color theory; Surround color; Three components

color theory; Chromatic induction; Color; Contrast; Crispening; 9411.

Optical; Photoelectric pyrometer; Radiance sources; Standards;

Temperature; Blackbody; International Practical Temperature Scale; 9347.

Optical attenuator; Photoelectric photometry; Radiometric

calibration; Radiometry; Laser; Laser energy measurement;

TN418.

Optical comparator; Thermal expansion; Controlled-gradient vacuum furnace; Elevated temperatures; J. 71C 2-247, 85-91

(1967).

Optical constants; Refractive index; Surface films; Complex

refractive index; Ellipsometry; Mercury; 9509.

Optical density; Propagance; Reflectance; Reflectance factor: Symbols; Transmittance; Transmittance factor; Absorptance;

Contrast; Modulation; Notation; 9373.

Optical depth; Oxygen 11; Plasma; T-tube; Carbon n; Coulomb

approximation; Electron density: Electron temperature;

Equivalent electrons; Local thermal equilibrium; Oscillator

strength (f-value); 9388.

Optical emission; X-ray spectrochemical analysis; Microanalytical techniques; Solids mass spectrometer; Electron probe

microanalyzer; NBS white cast iron sample (SRM 1175);

Stainless steel powder metallurgy compact; Optical metallography; M260-12.

Optical glasses: Radiation effects: Refractive index: 9358.

Optical materials: Refractive index; Dispersion: Fused silica; Infrared materials: 9190.

Optical metallography; Macroanalytical techniques: Optical

emission; X-ray spectrochemical analysis: Microanalytical

techniques; Solids mass spectrometer: Electron probe

microanalyzer; NBS white cast iron sample (SRM 1175):

M260-12.

Optical model; Van de Graaff; 14 MeV neutrons; "^-^Ho; Black

nucleus model; Cryogenic target; Coupled-channel calculation; Nuclear alignment: Nuclear deformation; 9362.

Optical Mossbauer spectrometer; Tandem Mossbauer spec- trometer: Velocity calibration; Mossbauer; Spectroscopy;

Standard; Differential chemical shift; Quadrupole splitting;

Random error: Systematic error; Sodium nitroprusside; Iron compounds: M260-13.

Optical power: Aluminum-silicone compound: GaAs lasers; Heat sink; 9467.

Optical properties; Sum rules; Characteristic electron energy

loss; Far ultraviolet: Germanium: Kronig- Kramers dispersion

relations; 9345.

Optical pumping; Sodium; Spin-exchange; Electron; 9275.

Optical pyrometer; Radiation thermometry; Standards; Temperature; Infrared pyrometer; International Practical Temperature Scale; 9343.

Optical radiation: Radiometry; Sources; Spectral radiance;

Blackbodies; Non-blackbody emission; 9344.

Optical refractive index: Programmed document distribution: Relaxation oscillator: Rotatable document bin array; Seat belt webbing abrasion; Abrasion resistance testing; Automatic

document distribution; Flexible tubing pump; Inverting amplifiers; TN437.

Optical spectroscopy: Symposium on trace characterization;

Trace characterization: X-ray spectroscopy: Electrochemical

methods: Electron and optical microscopy; Nuclear methods;

Mono. 100. Optical vibration; Vibration spectrum; Cold neutrons; Frequency; Inelastic scattering; Metal hydrides; Neutron scattering;

9506.

Optimization; Algorithms: Combinatorics; Mathematics;

Matroids; Networks; Operations research: 9314.

Optimization of variables 10 MW nuclear reactor; Pneumatic

tubes: Radiochemical laboratories; 14 MeV neutron generator; 100 MeV-40 KW LIN AC; Clean room; Computers;

Counting rooms; Feedback analysis; 9154.

Orbital energy; Polarizability; Quadrupole moment: Spectroscopic constants: Ab initio electronic calculation: Dipole moment; Dissociation energy; Electron affinity; Energy; Field

gradient: Magnetic constants; Molecular electronic structure; TN438.

Orientation; Potassium; Spark cutting; Zone refining; Crystal

growth; Fermi surface; J. 71 A 2-44i, 127-132 (1967).

Oriented; Partial melting; Recrystallization; Rubber: Slow melting; Stark rubber; Crystal size; Crystallized rubber; Heating

rate; Melting range: Melting temperature: J. 71A 3-455,

225-229(1967).

Orthobaric densities; Parahydrogen; J. 70A 6-425, 541-544

(1966).

173
Orthogonal; Quaternions; Skew-symmetric; Regular representation; Commutator; Matrix;^. 71B 1-196. 43-46 (1967).

Ortho-para; Relaxation time; Ti; Analyzer; Cryogenics;

Hydrogen; Instrument; Instrumentation; Liquefier; Liquid

hydrogen; Measurement; Nuclear spin relaxation time; 9486.

Oscillator strength (f-value); Optical depth; Oxygen ii; Plasma;

T-tube; Carbon ii; Coulomb approximation; Electron density;

Electron temperature; Equivalent electrons; Local thermal

equilibrium; 9i88.

Oscillator strengths; Transition probability; Ultraviolet lines of

Fe i; Atomic spectra; Iron;/. 70A 4-409, 325-371 [1966).

Oscillator strengths; Wavefunctions; Atomic term value; J. 71A

2-448, 163-168(1967).

Osmium alloys; Platinum alloys; Transition elements; Alloy

phases; Atomic ordering; A15-type phases; Chromium alloys;

Electron compounds; Intermediate phases; Nonstoichiometric phases; 957 7. Osmium tetraoxide; Vibration-rotation; Coriolis constant; Force

field; Infrared; 9349.

Osmotic pressure; Quantum fluid; Specific heat; Thermodynamic properties; Cryogenics; Dilution refrigerator; Enthalpy; Entropy; Fermi- Dirac gas; Helium-3; Helium-4; Liquid; Mixtures; TN362.

Overestimation of standard deviation; Second law heat; Slope

estimators; Third law heat; Vapor pressure; Bias of least squares estimators; Coefficient of variation; Correlated esti- mators; Enthalpy adjustments; J. 70A 6-424, 533-539, (1966).

Overgrade; Sedimentation; Sieve; Standard sieve; Abrasive

grain; Accumulation curve; Coated abrasive products; Grain,

abrasive; Micron; PS8-67. Overlay; Plywood; Shear test; Vacuum and pressure test; Adhesives; Boil test; Bonding; Exterior; Grading; Interior; Moisture content; PS 1-66. Oxidation; Population distribution; Rotation; Acetylene; CH;

Chemiluminescence; Cross section; Emission spectrum;

Energy transfer; Experimental; Gas; Oxygen atom; 9288.

Oxidation of polycyclic aromatic hydrocarbons; Sugars in solution; Conformational analysis; Carbon-14- and tritium-labeled

carbohydrates; Large-scale paper chromatography; Phenylhydrazono-phenylazo tautomerism; Cyclopentitols and re- lated substances; TN405.

Oxidation of polycyclic aromatic hydrocarbons; Phonylhydrazono-phenylazo tautomerism; Quebrachitol, levo-inositol; Standard reference materials; 1 ,2-0-isopropylidene

/3-L-idofuranose; 2,3-0-isopropylidene-j8-D-threo-pentulofuranose; Air pollution studies; TN427.

Oxide systems; Phase diagram; Scandium oxide; Boric oxide;

Liquid immiscibility; 9476.

Oxide systems; Silicates; Borates; Glassformers; Immiscibility;

Liquid immiscibility; Modifiers, network; 9475.

Oxygen; Ferrous standard reference materials; CO by infrared absorbancy; Homogeneity; Certified value; Eighteen

cooperating laboratories; Vacuum fusion; Inert gas fusion;

M260-1 4. Oxygen; Transport coefficients; Lennard-Jones; Kihara; Exp:

6; Morse potential functions; Eucken correction; Correlation;

Dilute gases; Nitrogen; TN350.

Oxygen atom; Oxidation; Population distribution; Rotation;

Acetylene; CH; Chemiluminescence; Cross section; Emission

spectrum; Energy transfer; Experimental; Gas; 9288.

Oxygen ii; Plasma; T-tube; Carbon ii; Coulomb approximation;

Electron density; Electron temperature; Equivalent electrons; Local thermal equilibrium; Oscillator strength (f-value); Optical depth; 9388.

Oxygen pressures; Silver oxide; Dissociation by heat; Entropy;

Equilibrium; Heat of reaction; 9377.

Ozone; Solar radiation; Spectral distribution; Water vapor concentration; Wavelength; Wavenumber; Aerosol; Air mass;

9525.

P

Packing pressure; Particle size; Silver-tin alloys; Spherical alloy;

Spherical-alloy amalgam; Adaptability; Amalgams; Dental

amalgam; Dentistry; Mercury-silver alloys; 9448.

Pade approximate fluctuations; Opalescence; X-transitions;

Critical phenomena; Critical point; Second order phase transi- tion; Singularities; M273.

Paint; Analysis; Colorimetric; Dithizone; Paint film; Fungicide; Latex; Mercury; 9431

Paint film; Fungicide; Latex; Mercury; Paint; Analysis;

Colorimetric; Dithizone; 9431.

Paints; Combustibility; Endurance; Fire; Flammability tests; 9176.

Pair distributions; Phase diagrams; Crystal growth; Kinetics;

Multicomponent systems; /7-paraffins; J. 71 A 4-457, 245-259

(1967).

Palladium group; Theoretical; Third spectra; Configurations

4c/"-l-4d" ' 5i-, energy levels; Interaction parameters; 7. 70A

5-415,435-445 (1966).

Paper; Sucrose; Animal glue; Glucose; Glycerol; Mannitol;

Melamine resin; 9455.

Parabolic classes; Congruence groups; Modular group; Normal

subgroups; 9375.

Parabolic class number; Quotient surface; Split extension; Factor set; Group extension; Level; Modular group; 9317.

Parahydrogen;y. 70A6-425. 541-544 (1966).

Parahydrogen; Pressure-volume; Properties; Temperatures; Tri- ple-point region; T-S diagram; Enthalpy; Entropy; TN343.

Parahydrogen; PKr-relations; Thermodynamic properties;

Equation of state; Hydrogen; J. 71 A 3-452, 203-218 (1967).

Parahydrogen; Shear viscosity; Temperature dependence;

Viscosity of parahydrogen; Liquid normal hydrogen; 9201.

Parahydrogen; Specific heat; Thermodynamic function; Density; Heat of vaporization; Hydrogen; 9246.

PARLORS program for Mossbauer spectra; Mossbauer instru- mentation; Mossbauer laboratories; Radiometric trace chro- matography; Radioisotope dilution; Substoichiometry by controlled potential coulometry; Radiochemical separations;

JN404.

PARLORS program for Mossbauer spectra; Photoneutron reaction; Solid state detectors; Standard reference materials; Tin

standard for chemical shift; Computers; Cross sections; Detection limits for analysis; Flux monitors; Mossbauer instru- mentation; TN421

Partial; Isometry; Generalized inverse; Matrix; J. 71B 4-247,

225-228(1967).

Partial differential equations; Stress waves; Wave propagation;

Characteristics; Impact; Linear viscoelasticity; 7. 708 4-187,

257-264(1966).

Partial isometry; Generalized inverse; Matrix; J . 71B 2&3-200,

65-67(1967).

Partial melting; Recrystallization; Rubber; Slow melting; Stark

rubber; Crystal size; Crystallized rubber; Heating rate; Melting range; Melting temperature; Oriented; J. 71A 3-455,

225-229(1967).

Particleboard, wood; Wood particleboard; Mat-formed par- ticleboard; Particleboard requirements; CS236-66.

Particleboard requirements; Particleboard, wood; Wood par- ticleboard; Mat-formed particleboard; CS236-66.

Particle size; Silver-tin alloys; Spherical alloy; Spherical-alloy

amalgam; Adaptability; Amalgams; Dental amalgam; Dentistry; Mercury-silver alloys; Packing pressure; 9448.

Partition function; Random walk; Adsorption; Chain polymer;

Critical energy; Generating function; Lattice model; J. 708

4-185, 237-247(1966).

Passivity; Potentiostat; Anodic oxidation; Ellipsornetry; Iron; Iron oxide films; Kinetics; 9469.

174
Patch fields; Single crystal planes; Work function; Energy dis- tribution; Field emission; 9423.

Patch fields; Tungsten; Work function; (1 10) plane; Energy dis- tribution; Field emission; 9424.

Patterson; Vector; Symmetry; Consistency; Frequency; Superposition; Crystal; Structure; 7. 70A 4-407, 319-321 ( 1 966 ). Pauli paramagnetism; Semiconductor; Strontium titanate; Bandstructure; Insulator; Magnetic susceptibility; 9453.

Pc 1 micropulsations; Plasma; Polarization; Propagation; Alf- ven; Dispersion; Hydromagnetic; Magnetosphere; Multicomponent; TN342.

PD scale; Acetic acid; Acidity in deuterium oxide; Deuterium

oxide; Dissociation constant; Heavy water; 97 70.

Peliat dynamometer; Proton precession frequency; Absolute

ampere determination; Calculable inductor; Current balance;

National electrical units; Nonmagnetic facility; 9325.

Pentafluorohalobenzenes; Direct replacement; High temperature; Mechanisms; Nonionic or ionic coreactants; Nuclear

fluorine; y. 70A 6-420, 473-480(1966).

Perception of color; Photometry; Physiological optics;

Psychophysics; Scaling of color; Color; Gloss; Light; 9336.

Perchlorylfluoride; Quadrupole coupling constant structure; Dipole moment; Microwave; 9204.

Perfluoro-p-quinonemethide; Polymerization; Poly-p-oxyperfluorobenzylene; Pyrolysis; 2,3,5,6-tetrafluoro-4-trifluoromethylphenol ; 1 -r-butoxy-2 ,3 ,5 ,6-tetrafluoro-4-trifluoromethylbenzene;y. 71 A 1-434,33-41 (1967).

Performance (long term); Reliability; Rubidium; Stability; Aging; Calibration (USPS); Frequency standards; Gas cells; TN341.

Performance; Relevance; Testing of information systems; Effectiveness; Evaluation; TN297.

Performance; Test method; Dynamic calibration and telemetering; Electro-mechanical; Pressure; Transducer; Calibration;

TN411.

Performance; 9800 RPS; 200 Watts (30 °K); Design; Expansion

turbine; Gas bearings; Helium refrigeration; 9151.

Performance results; Propellant management; Substitute fluid; Volume flow; Accuracy; Calibration; Commodity transfer; Cryogenic; Cryogenic processes; Density; Flowmeters; Mass

flow; Mass flowmeters; 9428.

Performance standards; Accelerated tests; Bathtubs; External

wall units; Innovation; Long-time behavior; 9452.

Periodic precipitation; Diffusion; Liesegang rings; M292.

Permanent magnet standards; Reference magnets; Calibration,

permanent magnet standards; Magnet standards; 9245.

Permeability; Spin waves; Tensor permeability; YIG; External

tensor permeability; Ferrimagnetic resonance; Ferrites; Garnet; Low magnetic field effects; 9395.

Permeability techniques; Frequency range; Magnetic core; 9196.

Permeation; Water vapor permeability; Absorption, water; Adsorption, water vapor; Leather; 9465.

Permittivity; Dissipation factor; Loss index; Dielectric strength;

Arc resistance; Tracking; Measurements; Electrical testing;

Conductance; Dielectric conductance; Conductivity; Volume

conductivity; Insulation conductance; Resistance; 9174.

Permittivity; Refractive index; Spectroscopy; Dielectric constant; Electric dipole moments; Gas phase; Microwave;

Microwave absorption; Molecular beam; NSRDS-NBSIO.

Personnel; Professional environment; Professional personnel;

Scientists and engineers; Standing committee; Technical per- sonnel; Environment; 9271

Pharmacy; Real-time hospital information system; Remote data

input; Administration; Hospital data communications;

Laboratory; Nursing station; 9500.

Phase; Digital; Phasemeter; Logic circuit; Low frequency; Measurements;y. 71C 3-257, 227-238 (1967).

Phase; Tracking; Atmospheric; Distance measurements;

Earth-to-space microwave transmissions; Microwave trans- missions; TN339.

Phase-angle; Standard; Audio frequency; Thermal voltage converter; Inductive voltage divider; Measurement; TN347.

Phase change; Resonance; Strontium titanate; Vacancies;

Young's modulus; Internal friction; Lanthanum titanate; 9447.

Phase diagram; Scandium oxide; Boric oxide; Liquid immiscibility; Oxide systems; 9476.

Phase diagrams; Crystal growth; Kinetics; Multicomponent

systems; w-paraffins; Pair distributions; J. 71 A 4-457, 245-259

(1967).

Phase equilibria; System; Tungsten trioxide; Crystal structure; Niobium pentoxide; 7. 70A 4-404. 281-303 (1966 ). Phase-equilibrium; Solid-vapor; Experimental; Helium-methane;

Low temperature; 9230.

Phasemeter; Logic circuit; Low frequency; Measurements;

Phase; Digital; 7. 71C 3-257, 227-238 (1967).

Phase relations; Platinum metal oxides; Solid solution; Cr203-Ir02 system; Dissociation; 9480.

Phase relations; Sn02-Ir02 system; Solid solution; Ti02-Ir02

system; Dissociation; 7. 71A2-441, 119-123 (1967).

Phase shifter; Universal time; Frequency translator; 91 52. Phase transition; Ferroelectrics; H2O; Ice; Inelastic scattering;

ICiFe(CN)6 3H2O; Librations; Low-frequency modes;

Neutron cross-sections; Neutron spectra; 9504.

Phase transition; Pretransition phenomena; Specific heat; Thermodynamic properties; Aluminum trifluoride; Drop

calorimetry, enthalpy measurements; High-temperature

calorimetry;y.71A i-450, 185-193 (1967).

Phenols; Thermodynamics; Dissociation; Electrolytes;

Methanol; w-nitrophenol; Nonaqueous solvents; J. 71A

1-430, 9-12 (1967).

Phenylazo compounds; Absorption spectra; Infrared spectra;

Mono-, bis-, and tris-(phenylhydrazones); J. 71A 4-459,

277-285(1967).

Phenylhydrazono-phenylazo tautomerism; Cyclopentitols and

related substances; Unsaturated alditols; Infrared spectra of

acylamido derivatives; Carbohydrate reference materials; Metallo-organic standard reference materials; Air-pollution

studies; TN405.

Phenylhydrazono-phenylazo tautomerism; Quebrachitol,

levo-inositol; Standard reference materials; 1 ,2-0-isopropylidene-j8-L-idofuranose; 2,3-0-isopropylidene-/3-D-threo-pentulofuranose; Air pollution studies; Characterization of chemical structures; TN427.

PH measurements; Acidity; Analysis; Conductance measurements; Electrochemical analysis; Electrochemistry of solutions; Glass electrodes; Medium effects; TN423.

Phonon bottleneck; Phonon-boundary scattering; Spin-phonon

interactions; Spin-lattice relaxation; Mono. 102. Phonon-boundary scattering; Spin-phonon interactions;

Spin-lattice relaxation; Phonon bottleneck; Mono. 102. Phonon interactions; Saturation factor; 4-3m symmetry; Angular dependence; Hexadecapole; Hexadecapole transitions; 9357.

Phonon nuclear interaction; Ultrasonics; Boxcar integrator;

Nuclear magnetic resonance; TN344.

Phosphate; Solubility isotherm; Calcium; Hydroxyapatite;

9212.

Phosphonium iodide (PH4I); Barrier to rotation; Electrostatic model; Inelastic neutron scattering; 9503.

Phosphorescence; Triplet states; Crystals; 91 78. Photocomposition; Printing and publication; Automated type

composition; Computerized typesetting; Graphic arts; Mono.

99.

175
Photodetachment; Cross section; Electron affinity; Molecular

structure; Negative hydroxy! ion; OD" ions; OH' ions; 9285.

Photo-detachment; Recombination; D region; Ionosphere;

Negative ions; 9252.

Photodisintegration; Zero-range; Cross section; Differential cross section; ^H; ^He; 9341

Photoelectric photometry; Radiometric calibration; Radiometry;

Laser; Laser energy measurement; Optical attenuator; TN418.

Photoelectric pyrometer; Radiance sources; Standards; Temperature; Blackbody; International Practical Temperature

Scale; Optical; 9i47.

Photoemission; Soft X-ray spectrum; Ag; Cu; Double electron photoexcitation; Ni; 9442.

Photographic contrast; Transmission of x rays; X-ray diffraction; Divergent x-ray beams; Kossel; Kossel sample preparation; 9521.

Photographic photometry; Plasma jet; Preconcentration; Pulse

height analyzer; Spectrochemical analysis; Spectroscopy;

Standard reference materials; Time-shared computer; X-ray

spectroscopy; Analysis; Arc temperature; Atomic absorption

spectrometry; TN401

Photography; Standards; Exposure; 9372.

Photoionization; Ionization energy; Ion pair process; 9194.

Photoionization; Photolysis; Hydrocarbons; Ion-molecule reaction; Isopentane; 9391

Photoionization; Radicals; Rydberg levels; Vacuum monochromators; Autoionization; Electronic; Excited states; H2O+;

NH3+; NH.2+; OH+ ions; Heats of formation; J. 70A 6-417,

459-463 (1966).

Photoionization; Rydberg; Threshold energies; Autoionization;

1 ,2-dideuteroethylene; Ethylene; Mass spectra; 9281.

Photoionization; Superexcited molecule; Butane; Ionization effi- ciency; Ion-molecule reactions; Ion-pair yields; 9272.

Photoionization; Threshold; Ultraviolet; Vacuum; Dissociation;

Fragment ions; Ionization; Mass spectrometer; Molecule;

NO-,; NO2+ N20 + ;y. 71A 5-467, 371-378 (1967).

Photoionization; Ultraviolet; Diatomic molecule; Interference; 9293.

Photoionization; Vacuum ultraviolet; Xenon; Atomic spectra;

Krypton; 9208.

Photolysis; Abstraction; Isobutane-da; Ketene; Methylene;

9322.

Photolysis; Energy transfer; Fluorescence; Hydrazoic acid; Nitrous oxide; 9418.

Photolysis; Hydrocarbons; Ion-molecule reaction; Isopentane;

Photoionization; 9391

Photolysis; Radiolysis; Free radicals; Ion-molecules reactions; Neopentane; 9180.

Photolysis; Solid phase; Vacuum ultraviolet; Carbene;

Ethylene; Ethylidene; Gas phase; 9415.

Photolysis; Triplet state; Vapor phase; Aldehyde; Energy

transfer; 9385.

Photolysis; Vacuum ultraviolet; Insertion; Isobutane; Isobutylidene; 9414.

Photolysis; Vacuum ultraviolet; Fluorescence; Hydrazoic acid; NH; 94/7.

Photometry; Physiological optics; Psychophysics; Scaling of

color; Color; Gloss; Light; Perception of color; 9336.

Photomultipliers; Signal noise ratio; Statistical properties; Time

intervals; Noise, signal; 9232.

Photon absorption; Quadrupole resonance; Deformed nuclei; Giant resonance; Nuclear hydrodynamics; Octupole deformation; 9296.

Photon cross-sections; Photon scattering; Photonuclear absorption; Photonuclear reaction; 9216.

Photoneutron; Activation curve; Cross-section; 9215.

Photoneutron; Response; Yields; Detector; Efficiency; Four-pi;

Halpern; Neutron; TN416.

Photoneutron reaction; Solid state detectors; Standard reference

materials; Tin standard for chemical shift; Computers; Cross

sections; Detection limits for analysis; Flux monitors; Mossbauer instrumentation; Mossbauer spectroscopy; NBS Linac;

Nickel-61; TN421.

Photoneutron reactions; Self absorption corrections; Standard

reference materials; Vanadium in irons and steels; Activation

analysis; Biological; Botanical samples; Carbon in sodium;

Cockroft-Walton generator; Digital computers; Flux monitors; High precision 14 MeV neutron activation; Homogeneity testing; Instrumentation; NBS Linac; NBS reactor; TN428.

Photoneutron reactions; Flux monitors; Cu, Se, Al, V in irons and steels; Homogeneity testing; Pneumatic rabbit sensor; Mossbauer spectroscopy; Tin standard for chemical shift; PARLORS program for Mossbauer spectra; Mossbauer in- strumentation; TN404.

Photons; Absorption; Collective model; Cross section; Deformed nuclei; Giant quadrupole resonances; 9352.

Photon scattering; Photonuclear absorption; Photonuclear reaction; Photon cross-sections; 9216.

Photonuclear absorption; Photonuclear reaction; Photon

cross-sections; Photon scattering; 9216.

Photonuclear absorption cross sections; Spherical nuclei; Theoretical physics; Nuclear physics; 9214.

Photonuclear physics apparatus; Scattering chamber; Semiconductor detectors; Detector telescope; Large area detectors; 9298.

Photonuclear reaction; Photon cross-sections; Photon scattering; Photonuclear absorption; 9216.

Photonuclear reactions; Bibliography; Data index; Elements;

Isotopes; Nuclear physics; M277, Supplement 1

Phrase structure grammar; Linguistics; Frame embedding;

Two-dimensional languages; Chinese characters; Grammar;

Generative grammar; Component combination; TN296.

Physical properties; Scheelite structure; Single crystal; X-ray

back-reflection; Calcium molybdate; Crystal orientation; Crystallographic groups; Interplanar angles; J. 70A 5-410,

379-384(1966).

Physiological optics; Psychophysics; Scaling of color; Color;

Gloss; Light; Perception of color; Photometry; 9336.

Pickup; DC-amplifiers; Filter; 9241.

Piecewise; Smoothing; Continuous function; Fourier series; J. lie 2-248, 93-100(1967).

Pierre de Fermat; Gregor Mendel; Isaac Todhunter; Anniversaries; History; Probability; Statistics; 9156.

Piezoelectric accelerometers; Reciprocity; Secondary standard; Vibration standard; Air bearing; Ceramic moving element;

Electrodynamic shaker; 9297.

Piezoelectricity; Pyroelectricity; Tendon; Bone; Collagen;

Hydroxyapatite; 9470.

Piston radiator; Potential diffraction; Radiator, piston; Sound;

Acoustics; Diffraction, potential; 9319.

Pitting; Pitting corrosion; Corrosion; Corrosion currents; Electroplating; Galvanic corrosion; 9490.

Pitting corrosion; Corrosion; Corrosion currents; Electroplating; Galvanic corrosion; Pitting; 9490.

pK values in ethanol-water; Sigma constants in ethanol-water;

Substituted benzoic acids; Allyl- and propenylbenzoic acids; Change of pK with dielectric constant; Hammett sigma constants; Ionization constants; 7. Ilk 5-468, 379-384 (1967).

Planck equation; Rayleigh-Jeans equation; Spectral radiance;

Wien equation; Brightness temperature; Color temperature;

Effective wavelength; Infrared and far infrared optical

pyrometry; 9310.

176
Plane strain; Thermal stress; Yield stress; Elastic stress; Heat

transfer; J. 70B 4-188. 265-272 (1966).

Plasma; Polarization; Propagation: Alfven; Dispersion;

Hydromagnetic; Magnetosphere; Multicomponent; Pc 1 micropulsations; TN342.

Plasma; Spectrometric; Electron temperature; Langmuir probe;

9382.

Plasma; T-tube; Carbon ii; Coulomb approximation; Electron

density; Electron temperature; Equivalent electrons; Local

thermal equilibrium; Oscillator strength (f-value); Optical

depth; Oxygen ii; 9388.

Plasma diagnostic techniques; Stark effect; Dense plasma; Line

broadening; 9195.

Plasma jet; Preconcentration; Pulse height analyzer; Spectrochemical analysis; Spectroscopy; Standard reference

materials; Time-shared computer; X-ray spectroscopy; Analysis; Arc temperature; Atomic absorption spectrometry;

Analog computer; Bibliography; TN401.

Plastic; Plimbing equipment; Tanks; Valves; Bowls; Brass; Dimensions; Nuts; PS6-66.

Plastic; Porcelain adhesion; Resin; Silane; Teeth; Bonding;

Coupling agent; Denture; 9494.

Plastic tape; Polytetrafluoroethylene; Resin skived tape; Skived

tape; TFE-fluorocarbon; Electrical tape, plastic; PS3-66.

Platinum; Reference material; Resistivity; Standard; Thermal

conductivity; Conductivity; Electrical conductivity; Electrical

resistivity; Heat conductivity; Lorenz function; 7. 71C 4-25^,

255-284(1967).

Platinum alloys; Transition elements; Alloy phases; Atomic or- dering; AI5-type phases; Chromium alloys; Electron compounds; Intermediate phases; Nonstoichiometric phases;

Osmium alloys; 9517.

Platinum metal oxides; Solid solution; Cr203-lr02 system; Dissociation; Phase relations; 9480.

Platinum resistance; Dynamic analog correlation system; Combination metering and safety valve; High temperatures; Transrotor engine; TN295.

Plimbing equipment; Tanks; Valves; Bowls; Brass; Dimensions;

Nuts; Plastic; PS6-66.

Plywood; Shear test; Vacuum and pressure test; Adhesives; Boil

test; Bonding; Exterior; Grading; Interior; Moisture content; Overlay; F5/-66.

Pneumatic rabbit sensor; Mossbauer spectroscopy; Tin standard

for chemical shift; PARLORS program for Mossbauer spectra; Mossbauer instrumentation; Mossbauer laboratories; Radiometric trace chromatography; Radioisotope dilution; TN404.

Pneumatic tubes; Radiochemical laboratories: 14 MeV neutron

generator; 100 MeV-40 KW LINAC; Clean room; Computers; Counting rooms; Feedback analysis; Optimization of

variables 10 MW nuclear reactor; 9154. P-n junctions: Radiative recombination; Silicon: Space charge

regions; Gallium arsenide; Germanium; 9579.

Point defects; Polarization: NaCl; CsCl; CaFy. ZnS: Electric

fields: Ionic crystals; Lattice sums; J. 71A 1-428, 1-2 (1967).

Point defects; Theory; Vacancies: Vibrational states; Calculations; Electronic states, energies of formation; Energies of motion; Interstitials; M287.

Point source; Shielding: Single scatter: Air-scatter; Angular dis- tribution: Energy spectrum: Gamma rays; Neutrons; 9308.

Point supports; Simplified approximate solutions: Thin plates; Bassali's theory: Concentric loading; Circular plates: Deflection; Elasticity; Experimental: Flexure: 7. "JOC 4-234, 227-244

(1966).

Polar cap absorption: Solar protons: Sporadic-E; Auroral ab- sorption; Auroral radar; Ionospheric disturbances; 9193.

Polarizability; Quadrupole moment; Spectroscopic constants; Ab initio electronic calculation; Dipole moment; Dissociation energy; Electron affinity: Energy; Field gradient; Magnetic constants; Molecular electronic structure; Orbital ener- gy: TN438.

Polarizability; Refractive index; Annealing; Density; Glass;

Hydrostatic compression: 9510.

Polarization: NaCl; CsCl; CaF2: ZnS: Electric fields: Ionic

crystals: Latficesums; Point defects; 7. 71A 1-428, 1-2 (1967).

Polarization; Propagation; Alfven; Dispersion; Hydromagnetic:

Magnetosphere: Multicomponent; Pc 1 micropulsations;

Plasma; TN342.

Polarization circuits; Ni-Fe pitting; Corrosion rates, Ni-Fe al- loys; Polarization techniques: Polarization rate; Polarization

resistance; y. 70C 3-230. 187-194 (1966).

Polarization energy; Shell calculations; Solid solutions; Alkali

halides; Heats of solution; Ion substitution; Lattice relaxation; 9300.

Polarization rate; Polarization resistance; Polarization circuits; Ni-Fe pitting: Corrosion rates, Ni-Fe alloys; Polarization

techniques:^. 70C 3-230. 187-194 (1966).

Polarization resistance: Polarization circuits: Ni-Fe pitting; Corrosion rates, Ni-Fe alloys; Polarization techniques; Polarization rate: J. 70C 3-230, 187-194 (1966).

Polarization techniques: Polarization rate: Polarization re- sistance; Polarization circuits; Ni-Fe pitting; Corrosion rates, Ni-Fe alloys; y. 70C 3-230, 187-194 (1966).

Polarized electronic absorption spectrum; Tentative assignment

based on selection rules; Bi-nuclear complex; Copper (II) acetate monohydrate; 9755.

Polarized spectrum; Bis(acetylacetonato) copper (II); Bis(3-phenyl-2.4-pentanedionato) copper (II): Crystal spec- trum; 9426.

Polarized ultraviolet spectrum: Tetrachlorocuprate ion; Copper

doped tetrachlorozincate; E.p.r. analysis; Jahn-Teller effect; 9797.

Polarographic analysis; Standard reference materials, analysis

of; Stoichiometry; Atomic weights: Coulometric analysis: Gas

analysis; Mass spectrometric gas analysis; Microchemical

analysis; TN403.

Polarographic analysis; Standard reference materials, analysis;

Coulometric analysis; Gas analysis; Mass spectrometric gas

analysis; Microchemical analysis; Null-point potentiometry;

TN425.

Poly(tetrafiuoroethylene): Time; Reference specimens; Dielectric constant; Dissipation factor: Frequency; Fluorinated

ethylene-propylene; Humidity; Polycarbonate: Polyethylene;

y. 71C 2-257, 119-125 (1967).

Poly(l,4-cyclohexylenedimethylene terephthalate); Polystyrene;

Poly(tetrafluoroethylene); Time; Reference specimens: Dielectric constant; Dissipation factor; Frequency; Fluorinated

ethylene-propylene; Humidity;y. 71C 2-257, 119-125 (1967).

Polyacrylonitrile; Polyamides; Reflection of x-rays; Soft x-rays; X-rays; Fibers; Microfocus tubes; Microradiography; Nylon;

9488.

Polyacrylonitrile: Propagation: Cyanide groups: Initiation; Isolation: Naphthylidiene ring; 9489.

Polyamides; Reflection of x-rays; Soft x-rays; X-rays; Fibers;

Microfocus tubes; Microradiography; Nylon;

Polyacrylonitrile; 9488.

Polybutadiene; Homogeneous .anionic polymerization: Monodisperse, polystyrene, poly-a-methylstyrene; Polyisoprene;

J. 70X5-141, 421-433 (1966).

Polybutadiene: Polyethylene; Polyisobutylene; Rubber; Specific

heat; Butadiene-acrylonitrile copolymer; Butadiene-styrene

copolymers: Crystallization of rubber; Elastomers; 9520.

Polycarbonate: Polyethylene; Poly(l ,4-cyclohexylenedimethylene terephthalate); Polystyrene: Poly(tetrafluoroethylene);

Time; Reference specimens; Dielectric constant; Dissipation

factor: Frequency; y. 71C 2-25 1 , 1 1 9-1 25 (1967).

Ill
Polychlorotrifluoroethylene; Quenched sample; Storage modulus; Tan S; Torsion pendulum; Varying crystallinities; Apparatus; Isothermally crystallized sample; Loss compliance;

Loss modulus; Mechanical relaxation; 9441.

Polychlorotrifluoroethylene; Polyethylene; Polymers; Surface

free energy; Chain folding; Crystal growth; Crystallization

kinetics; Homogeneous nucleation; Interfacial energy;

Nucleation; 9454.

Polychlorotrifluoroethylene; Polyethylene; Polymer;

Semicrystalline; Vacancy; Annealing; Chain fold; Chain rota- tion; Chain twisting; Defect; Dielectric relaxation; Mechanical relaxation; 9462.

Polycrystalline CaFz; Single-crystal CaF2; Calcium fluoride; Elevated-temperature emissivity; Infrared absorption coeffi- cients; Infrared emissivity; 9312.

Polycrystalline garnets; Tensor permeability; Degenerate mode

cavity; L-band cavity; J. 71C 1-445, 69-75 {1967).

Polydispersity; Polynomial representation; Sedimentation

equilibrium; Molecular weight average; Molecular weight dis- tributions; Moments;J.71A 7-457, 13-17(1967).

Polyethylene; Poly(l,4-cyclohexylenedimethylene terephthalate); Polystyrene; Poly(tetrafluoroethylene); Time; Reference

specimens; Dielectric constant; Dissipation factor; Frequency; Fluorinated ethylene-propylene; J. 71C 2-251, 119-125

(1967).

Polyethylene; Polyisobutylene; Rubber; Specific heat; Butadiene-acrylonitrile copolymer; Butadiene-styrene

copolymers; Crystallization of rubber; Elastomers; Polybutadiene; 9520.

Polyethylene; Polymer; Semicrystalline; Vacancy; Annealing;

Chain fold; Chain rotation; Chain twisting; Defect; Dielectric

relaxation; Mechanical relaxation; Polychlorotrifluoroethyl- ene; 9462.

Polyethylene; Polymer degradation; Stability of polymers; Thermogravimetry; Energy of activafion; Initial kinetic parameters; Non-isothermal kinetics; 9457.

Polyethylene; Polymers; Surface free energy; Chain folding;

Crystal growth; Crystallization kinetics; Homogeneous

nucleation; Interfacial energy; Nucleation; Polychlorotrifluoroethylene; 9454.

Polyethylene; Thermodynamic properties; Convergence temperature; Melting temperatures; Methyl surfaces; /(-paraffins;

J. 70A 6-421,481-486 (1966).

Polyethylene oxide; Tetrahydrofuran; Hydroxyl radicals; Elec- tron spin resonance; Free radicals; Polyvinyl alcohol; 97 75. Polyisobutylene; Recovery; Stress; Relaxation; BKZ theory;

Constant rate of strain; Creep; Elastic fluid; Nonlinear

behavior; J. 70A 6-423, 525-532 (1966).

Polyisobutylene; Rubber; Specific heat; Butadiene-acrylonitrile

copolymer; Butadiene-styrene copolymers; Crystallization of

rubber; Elastomers; Polybutadiene; Polyethylene; 9520.

Polyisoprene; Polybutadiene; Homogeneous anionic polymerization; Monodisperse, polystyrene, poly-a-methylstyrene;

J. 70X5-414,421-433 (1966).

Polymer; Polystyrene; Solvent effects; Ultraviolet absorption;

Carbon tetrachloride; Cyclohexane; Ethylbenzene; Extinction

coeificient;y. 11X2-449, 169-175 (1967).

Polymer; Preparation; Purity; Sampling; Standard sample;

Volatile content; Ash content; Elemental analysis;

Homogeneity; Lithium content; Molecular weights; J. 71A

1-435.43-47 (1967).

Polymer; Semicrystalline; Vacancy; Annealing; Chain fold; Chain rotation; Chain twisting; Defect; Dielectric relaxation;

Mechanical relaxation; Polychlorotrifluoroethylene;

Polyethylene; 9462.

Polymer; Solution; Theory; Diffusion coefficient; 9425.

Polymer chain dynamics; Radius of gyration; Relaxation;

Statistical-bead model; Autocorrelation; Correlation;

End-to-end length; Fokker-Planck equation; 9575.

Polymer chain dynamics; Relaxation; Simulation; Distribution;

End-to-end length; Lattice model; Monte Carlo; 9574.

Polymer degradation; Postirradiative decay; Aqueous solution; Cross-linking; Dextran; Dextran triacetate; Gamma irradia- tion;7. 71A 1-433, 25-31 (1967).

Polymer degradation; Stability of polymers; Thermogravimetry;

Energy of activation; Initial kinetic parameters; Non-isothermal kinetics; Polyethylene; 9457.

Polymeric anion; AH; AS; Equilibria; Equilibrir.m concentration

of monomer; a-trideuteromethyl-j3,/3-dideuterostyrene; Lowering of steric repulsions; 9254.

Polymeric solids; Primary fracture front; Topography; Brittle polymers; Fracture topography; Kinetics; 9487.

Polymerization; Poly-p-oxyperfluorobenzylene; Pyrolysis;

2,3,5,6-tetrafluoro-4-trifluoromethylphenol; 1-r-butoxy2 ,3 ,5 ,6-tetrafluoro-4-trifluoromethylbenzene ; Perfiuoro-p-quinonemethide;y. 71A 1-434.33-41 (1967).

Polymerization; Pressure; Poly-5,5,5,4,4,3,3-heptafluoropentene-1; Poly-4,4,4,3,3-pentafluorobutene-l ; Poly-3,3,3-trifluoropropene; Gamma radiation; 9226.

Polymerization; Pyrolysis; Thermal decomposition; Thermal

volatilization; 1,2-dihydronaphthalene; Degradation; 9218.

Polymers; Pyrolysis; Thermal decomposition; Thermogravimetry; Thermolysis; Stability of polymers; Degradation; Nonisothermal kinetics; 7. 70A 6-422, 487-523 (1966).

Polymers; Surface free energy; Chain folding; Crystal growth;

Crystallization kinetics; Homogeneous nucleation; Interfacial energy; Nucleation; Polychlorotrifluoroethylene; Polyethylene; 9454.

Polynomial; Relative error; Round-off; Evaluation; Newton

form;y. 718 7-797, 11-17(1967).

Polynomial approximations; Biorthogonal functions;

Gamma-ray penetration theory; Neutron penetration theory;

J. nB4-244, 197-211 (1967).

Polynomial representation; Sedimentation equilibrium; Molecular weight average; Molecular weight distributions; Moments;

Polydispersity; y. 71A 7-4i7, 13-17 (1967).

Polynomials; Binomial coefficients; Bounds; J. 71B 1-190, 9-10

(1967).

Polynomials; Functions; Variables; Hermite-Fejer; Bernstein;

Chebyshev; Approximations; Convergence; MultidimensionaUy. 70B 3-182, 211-218 (1966).

Poly-p-oxyperfluorobenzylene; Pyrolysis; 2,3,5,6-tetrafluoro-4-

trifluoromethylphenol ; 1 -r-butoxy-2 ,3 ,5 ,6-tetrafluoro-4-trifluoromethylbenzene; Perfluoro-p-quinonemethide; Polymerization; y. 71A 7-4i4, ii-47 (7967).

Polysilanes; Silicon; Sub-halides; Boron; Fluorine; NMR; 9229.

Polystyrene; Poly(tetrafluorethylene); Time; Reference

specimens; Dielectric constant; Dissipafion factor; Frequency; Fluorinated ethylene-propylene; Humidity; Polycarbonate; Polyethylene;y.71C 2-257, 779-725 (1967).

Polystyrene; Solvent effects; Ultraviolet absorption; Carbon

tetrachloride; Cyclohexane; Ethylbenzene; Extinction coeffi- cient; Polymer; J. 71A 2-449, 169-1 75 (1 967).

Polytetrafluoroethylene; Resin sintered coatings; TFE-fluorocarbon; Coatings, dry film; Dry film lubrication; CS274-66.

Polytetrafluoroethylene; Resin skived tape; Skived tape;

TFE-fluorocarbon; Electrical tape, plasfic; Plastic tape;

PS3-66.

Polytetrafluoroethylene (Teflon); Refractory compounds; Aluminum borides; Boron; Boron carbide; Carbon; Fluorine;

Heat of combustion; 9270.

Polyvinyl alcohol; Polyethylene oxide; Tetrahydrofuran;

Hydroxyl radicals; Electron spin resonance; Free radicals; 9775.

Poly-3,3,3-trifluoropropene; Gamma radiation; Polymerization;

Pressure; Poly-5,5,5,4,4,3,3-heptafluoropentene-l ; Poly4,4,4,3,3-pentafluorobutene-l ; 9226.

178
Poly-4,4,4,3,3-pentafluorobutene-l; Poly-3,3 ,3-trifluoropropene;

Gamma radiation; Polymerization; Pressure; Poly-5,5 ,5,4,4,- 3,3-heptafluoropentene-l ; 9226.

Poly-5,5,5,4,4,3,3-heptafluoropentene-l ; Poiy-4 ,4,4,3 ,3-pentafiuorobutene-l ; Poly-3,3 ,3-trifluoropropene; Gamma radiation; Polymerization; Pressure; 9226.

Population distribution; Rotation; Acetylene; CH; Chemiluminescence; Cross section; Emission spectrum; Energy

transfer; Experimental; Gas; Oxygen atom; Oxidation; 9288.

Porcelain adhesion; Resin; Silane; Teeth; Bonding; Coupling

agent; Denture; Plastic; 9494.

Porcelain enamel; Porcelain enamel defects; Bubble structure; Continuity of coating; Corrosion resistance; High-voltage

testing; 9223.

Porcelain enamel; Sanitary ware; Sheet steel; Abrasion re- sistance; Chemical resistance; PS5-66.

Porcelain enamel; Soil, residual; Cleanability, porcelain enamel

surfaces; Fluorescent soils; 9222.

Porcelain enamel defects; Bubble structure; Continuity of coating; Corrosion resistance; High-voltage testing; Porcelain

enamel; 9223.

Positive and negative self-surface ionization; Tungsten; Electron

affinity; 9393.

Positronium; Quenching; Annihilation radiation; Compton

wavelength of the electron; J. 71 A 5-464, 347-353 {1967).

Postirradiative decay; Aqueous solution; Cross-linking; Dextran; Dextran triacetate; Gamma irradiation; Polymer

degradation; y. 71A 1-433, 25-31 (1967).

Potassium; Single crystals; Zone refining; Fermi surface; Magnetoacoustic absorption; 9197.

Potassium; Spark cutting; Zone refining; Crystal growth; Fermi

surface; Orientation ;y. 71A 2-443, 127-132 (1967).

Potassium chlorate; Measurements at 0 °C; Nuclear quadrupole

resonance thermometry; J. 71A 2-442, 125-126 (1967).

Potential diffraction; Radiator, piston; Sound; Acoustics; Dif- fraction, potential; Piston radiator; 9319.

Potential functions; Dilute gases; Neon; Krypton; Xenon;

Transport coefficients; Correlations; M-6; Kihara; Exp: 6, Morse; TN352.

Potential functions; Empirical and semi-empirical; Transport

properties; Virial coefficients; Atoms; Compressibility; Heat

of sublimation; Molecules; TN246.

Potential heat; Structural load; Apartment dwelling; Burnout

test; Fire load; Fire performance; Flame penetration; BSSIO.

Potentiostat; Anodic oxidation; Ellipsometry; Iron; Iron oxide

films; Kinetics; Passivity; 9469.

Powder-patterns; Reference-intensities; Standard; Structure; X-ray diffraction; Constants; Crystal; Lattice; Measurements;

Mono. 25, Section 5. Praseodymium; Rare earth; Sliding spark discharge lamp; Spectrum; Atomic energy levels; Isoelectronic sequence; J. 71A

6-474,583-585 (1967).

Precision; Statistical control; Uncertainty; Accuracy; Mass

measurement; Measurement; Measurement process; Mono.

103. Precision coaxial measurements; RF connector; Coaxial

techniques; 9i57.

Precision measurements; Ratio; Resistor; Four-terminal; Resistance decade; Transresistance; URS (universal ratio set); VERI (versatile ratio instrument); DRRS (direct reading ratio

set); Junction; y. 70C 3-228, 169-172 (1966).

Preconcentration; Pulse height analyzer; Spectrochemical analysis; Spectroscopy; Standard reference materials; Time-shared

computer; X-ray spectroscopy; Analysis; Arc temperature;

Atomic absorption spectrometry; Analog computer; Bibliography; Computer; TN401

Predicting leak rates; Seal leakage; Valve seat leakage; Leak de- tection; Leak fiow rates; Leak rates; Leakage through valves; TN355.

Predissociation; Quantum mechanics; Resonance scattering;

Theoretical; Unimolecular dissociation; Activated complex;

Activated molecules; Activated state; Decay; Dissociation;

High pressure rate constant; Kinetics; Lifetime; Mass spectra;

9366.

Preexponential factor; Stability of polymers; Thermogravimetric

analysis; Variation of the activation energy; Calculation of

kinetic parameters; Determination of activation energies;

9192.

Prefabricated sheets; Radiative cooling; Roofing research; Solar

heating; Liquid-applied coatings; Membrane movements;

9432.

Premelting; AI2O3; Dissociation; Environmental effects; Melting

point; y. 71A 4-463, 31 7-333 (1967).

Preparation; Purity; Sampling; Standard sample; Volatile content; Ash content; Elemental analysis; Homogeneity; Lithium

content; Molecular weights; Polymer; J. 71A 1-435, 43-47

(1967).

Pressure; Poiy-5,5,5,4,4,3,3-heptafluoropentene-l ; Poly-4,4,4,-

3,3-pentafluorobutene-] ; Poly-3,3 ,3-trifluoropropene; Gamma

radiation; Polymerization; 9226.

Pressure; Three-terminal electrode set; Clausius-Mossotti; Density; Dielectric constant; Dilatometer; Function; High pres- sure; «-hexane; 7. 71A 4-460, 287-292 (1967). Pressure; Transducer; Calibration; Performance; Test method;

Dynamic calibration and telemetering; Electro-mechanical;

TN411.

Pressure cycling; Pressure transducer; Strain gage; Life cycling;

Life testing; TN434.

Pressure drop; Compressible flow; Flow comparison; Fluid

flow; Incompressible fiow; Mass flow; TN356.

Pressure gage; Temperature; Temperature gradient; Transducers; Flush diaphragm; 9258.

Pressure transducer; Strain gage; Life cycling; Life testing; Pres- sure cycling; TN434.

Pressure-volume; Properties; Temperatures; Triple-point re- gion; T-S diagram; Enthalpy; Entropy; Parahydrogen;

TN343.

Pretransition phenomena; Specific heat; Thermodynamic properties; Aluminum trifluoride; Drop calorimetry, enthalpy

measurements; High-temperature calorimetry; Phase transi- tion; 7. 71A i-450, 185-193(1967).

Preventive measures; Splitting failures; Thermal shock; Built-up

roof membrane; Innovation; 9207.

Price list; Property of material; Purity of material; Standard

reference materials; Standards; Analysis; Catalog; Certificate; Characterization; Composition; M260, 1967 Edition.

Prigogine's cell theory; Thermodynamic properties;

Three-parameter theorem; Argon; Molecular complexity;

Molecular thermodynamics; 9386.

Primary creep; Shear; Shell; Stress analysis; Thin wall; Torsion;

Tube; Creep; y.71Ci-256, 209-225 (1967).

Primary fracture front; Topography; Brittle polymers; Fracture topography; Kinetics; Polymeric solids; 9487.

Primary process; Decay; Flash photolysis; Lifetime; Matrix

isolation; 9396.

Primary thermometry; Speed of sound; Ultrasonic interferometer; Acoustical thermometry; Isotherms below 20 °K; Low

temperature thermometry; 9379.

Printing and publication; Automated type composition; Computerized typesetting; Graphic arts; Photocomposition; Mono.

99. Prism interferometer; Testing of lenses; Interferometer; Lens

aberrations; 9231

Probability; Statistics; Pierre de Fermat; Gregor Mendel; Isaac Todhunter; Anniversaries; History; 9156.

Probability distributions; Relaxation; Transition probabilities;

Exponenfial relaxation; Master equation; Moments; 9527.

179
Probability master samples; Propagation of error computations;

Statistical standards; Automatic data processing equipment;

Confidentiality audits; Disaggregation; Disclosure criteria; Federal statistical system; Inherent computability; Matching;

9247.

Procedures; Instrumentation; Isotopic analyses; Mass spec- trometry; TN426.

Procedures; Isotopic analysis; Mass spectrometry; Instrumentation; TN277.

Proceedings, 1966 Standards Laboratory Conference; Traceability; United States measurement system; Accuracy; Calibrations; Conferences, 1966 Standards Laboratory; Foreign stan- dards laboratories; Laboratory management; Measurements

and standards; M29I

Products; Propagation of error; Random; Ratio; Systematic;

Sum; Approximation; Error; Formula; Imprecision; Law of

error;7.70C 4-237, 263-273(1966).

Professional environment; Professional personnel; Scientists and engineers; Standing committee; Technical personnel; Environment; Personnel; 9277.

Professional personnel; Scientists and engineers; Standing committee; Technical personnel; Environment; Personnel; Professional environment; 9277.

Programmed document distribution; Relaxation oscillator; Rotatable document bin array; Seat belt webbing abrasion;

Abrasion resistance testing; Automatic document distribution; Flexible tubing pump; Inverting amplifiers; Laser beam phase

shift; TN437,

Progress; Standards; State-of-the-art; Modules; Nuclear instru- ments; 9209.

Promethium; Rare earth; Atomic spectroscopy; Electronic ener- gy levels; Neutral atom; 7. 71A 6-475. 587-599 (1967).

Propagance; Reflectance; Reflectance factor; Symbols; Transmittance; Transmittance factor; Absorptance; Contrast; Modulation; Notation; Optical density; 9373.

Propagation; Alfven; Dispersion; Hydromagnetic; Magnetosphere; Multicomponent; Pc I micropulsations; Plasma;

Polarization; TN342.

Propagation; Cyanide groups; Initiation; Isolation; Naphthylidiene ring; Polyacrylonitrile; 9489.

Propagation of error; Random; Ratio; Systematic; Sum; Approximation; Error; Formula; Imprecision; Law of error; Products;^. 70C 4-237. 263-273 ( 1966).

Propagation of error; Stability; Systems of differential equations;

Num.erical integration; J. 71B 2&3-204, 91-103 (1967).

Propagation of error computations; Statistical standards; Automatic data processing equipment; Confidentiality audits; Disaggregation; Disclosure criteria; Federal statistical system;

Inherent computability; Matching; Probability master samples; 9247.

Propellant management; Substitute fluid; Volume flow; Accuracy; Calibration; Commodity transfer; Cryogenic; Cryogenic

processes; Density; Flowmeters; Mass flow; Mass flowmeters; Performance results; 9428.

Properties; Temperatures; Triple-point region; T-S diagram;

Enthalpy; Entropy; Parahydrogen; Pressure-volume; TN343.

Properties of glass; Glass research; Glass technology; 9437.

Properties of matter and materials; Engineering measurements

and standards; Measurement standards; M282.

Property of material; Purity of material; Standard reference

materials; Standards; Analysis; Catalog; Certificate; Characterization; Composition; Price list; M260, 1967 Edition. Proton; Bond length; Broad-line; Carbonyl; Cobalt; Cobalt

tetracarbonyl hydride; Hydride; Nuclear magnetic resonance;

9449.

Proton; Bond lengths; Boron; Broad-line; Dimethoxyborane;

Hydride; Nuclear magnetic resonance; 9450.

Proton precession frequency; Absolute ampere determination;

Calculable inductor; Current balance; National electrical units; Nonmagnetic facility; Pellat dynamometer; 9325.

Prouhet-Terry-Escott problem; Symmetric functions; Diophantine equations; 7.718 4-247, 181-182 (1967).

Psychology; Readability; Standards; Symbols; Type faces; Typography; Visibility; Alphanumeric characters; Displays;

Handbook; Human factors; Legibility; M262-2.

Psychophysics; Scaling of color; Color; Gloss; Light; Perception of color; Photometry; Physiological optics; 9336.

Publication; Documentation; Information retrieval; 9244.

Publishing; Redacting; Abstracts; Editing; Journals; 92 80. Pulse height analyzer; Spectrochemical analysis; Spectroscopy;

Standard reference materials; Time-shared computer; X-ray

spectroscopy; Analysis; Arc temperature; Atomic absorption

spectrometry; Analog computer: Bibliography; Computer;

Electrodeposition; TN401

Purity; Sampling; Standard sample; Volatile content; Ash content; Elemental analysis; Homogeneity; Lithium content; Molecular weights; Polymer; Preparation;.7. 71 A 1-435, 43-47

(1967).

Purity of material; Standard reference materials; Standards;

Analysis; Catalog; Certificate; Characterization; Composition; Price list; Property of material; M260, 1967 Edition.

PLT-relations; Thermodynamic properties; Equation of state; Hydrogen; Parahydrogen; 7. 71 A i-452, 203-218(1967).

Pycnometer; Density; Liquids; 9360.

Pyranose-furanose interconversions; Sugars in solution; Acid-base catalysis in D2O; Deuterium isotope effects; D-fructose; D-glucose; Isotope effects; Mechanism of mutarotation; Mutarotation; 7. 71A 2-445, 137-148 (1967).

Pyroelectricity; Tendon; Bone; Collagen; Hydroxyapatite;

Piezoelectricity; 9470.

Pyrolysis; Thermal decomposition; Thermogravimetry; Thermolysis; Stability of polymers; Degradation; Nonisothermal

kinetics; Polymers; 7. 70A 6-422, 487-523 (1966).

Pyrolysis; Thermal decomposition; Thermal volatilization;

1 ,2-dihydronaphthalene; Degradation; Polymerization; 9218.

Pyrolysis; 2,3,5,6-tetrafluoro-4-trifluoromethylphenol; 1-r-bu- toxy-2 ,3 ,5 ,6-tetrafiuoro-4-trifluoromethylbenzene; Perfluoro- p-quinonemethide; Polymerization; Poly-p-oxyperfluorobenzylene;7. 71A 7-4i4, 33-41 (1967).

Pyrometry; Standard; Temperature; Graphite arc; 9i46.

Q

Quadrature; Analysis; Integration; Mathematics; Monte-Carlo;

Multiple integration; Numerical analysis; Numerical integration; 9i27.

Quadrature; Integration; Gaussian; Mono. 98. Quadrupole coupling constant structure; Dipole moment;

Microwave; Perchlorylfiuoride; 9204.

Quadrupole moment; Spectroscopic constants; Ab initio elec- tronic calculation; Dipole moment; Dissociation energy; Elec- tron affinity; Energy; Field gradient; Magnetic constants; Molecular electronic structure; Orbital energy; Polarizability;

TN438.

Quadrupole resonance; Deformed nuclei; Giant resonance; Nuclear hydrodynamics; Octupole deformation; Photon ab- sorption; 9296.

Quadrupole splitting; Random error; Systematic error; Sodium

nitroprusside; Iron compounds; Optical Mossbauer spec- trometer; Tandem Mossbauer spectrometer; Velocity calibration; Mossbauer; Spectroscopy; Standard; Differential chemical shift; M260-7i.

Quadrupole splitting; Sodium nitroprusside; Standardization;

Crystal structure; Differential chemical shift; Mossbauer

spectroscopy; 9238.

180
Quadrupole splitting; Stannic oxide; High pressure; Line

broadening; Mossbauer spectroscopy; 9206.

Quantitative analysis; Management; Decision-making; Education; Operations research; TN414.

Quantum fluid; Specific heat; Thermodynamic properties;

Cryogenics; Dilution refrigerator; Enthalpy; Entropy;

Fermi-Dirac gas; Helium-3; Helium-4; Liquid; Mixtures;

Osmotic pressure; TN362.

Quantum mechanics; Hydrogen; Equation of state; Statistical mechanics; Intermolecular potential; Second virial coefficient; TN4I2.

Quantum mechanics; Resonance scattering; Theoretical;

Unimolecular dissociation; Activated complex; Activated

molecules; Activated state; Decay; Dissociation; High pres- sure rate constant; Kinetics; Lifetime; Mass spectra; Metastable molecules; 9366.

Quantum statistics; Quantum virial coefficient; Second virial coefficient; Hard spheres; 9282.

Quantum theory of angular momentum; 3j coefficient; 6j coeffi- cient; 9j coefficient; Clebsch-Gordan coefficients; Fortran program; Wigner coefficients; TN409.

Quantum virial coefficient; Second virial coefficient; Hard

spheres; Quantum statistics; 9282.

Quarter-wave plate; Ellipsometer; Multiple reflections; 9522.

Quaternions; Skew-symmetric; Regular representation; Commutator; Matrix; Orthogonal ;y.71B 1-196,43-46(1967).

Quebrachitol, levo-inositol; Standard reference materials;

1 ,2-0-isopropylidene-/S-L-idofuranose; 2,3-0-isopropylidene-

/3-D-threo-pentulofuranose; Air pollution studies; Characterization of chemical structures; Disaccharide of d-lyxofu- ranose; TN427.

Quenched glass; Residual (configurational) entropy; Thermodynamic properties; Annealed glass; Crystal; Diethyl

phthalate; Glass transformation; Heat capacity calorimetry;

Molecular configurational state; J. 71X4-461, 293-305 {1967}.

Quenched sample; Storage modulus; Tan 8; Torsion pendulum;

Varying crystallinities; Apparatus; Isothermally crystallized

sample; Loss compliance; Loss modulus; Mechanical relaxation; Polychlorotrifluoroethylene; 9441

Quenching; Annihilation radiation; Compton wavelength of the electron; Positronium; 7. 1\\ 5-464, 347-353 (1967).

Quotient surface; Split extension; Factor set; Group extension;

Level; Modular group; Parabolic class number; 9317

R

Radiance sources; Standards; Temperature; Blackbody; Inter- national Practical Temperature Scale; Optical; Photoelectric

pyrometer; 9347.

Radiant heat transfer; Reflectance measurements; Thermal

radiation; Computational methods; Emissivity; Emittance

measurements; 9303.

Radiation, charged particles; Charged particles; Electrons and

photons; Interaction of radiation; 9250.

Radiation; Rotational level; Vibrational state; 337-micron CN

laser; Laser; 9163.

Radiation; Spectroscopy; Ultraviolet; X-rays; Absorption;

9311.

Radiation damage; Reactor materials: Ceramics; Lattice defects; Nuclear fuels; Nuclear science and technology; M285.

Radiation effects; Refractive index; Optical glasses; 9358.

Radiation field; Resonance; Thallium; Atomic beam; Frequency

shift; TN346.

Radiation-induced cavitation; Threshold; Acoustic cavitation; Alpha-particle-induced cavitation; Cavitation; Cavitation

nucleus; Cavitation threshold; Fission-induced cavitation; Neutron-induced cavitation; 7. 71C 4-261, 299-312 (1967).

Radiation induced polymerization; Radiation intensity; Activation enthalpy; Hexafluoropropylene; High pressure; Intrinsic viscosity; 9257.

Radiation intensity; Activation enthalpy; Hexafluoropropylene;

High pressure; Intrinsic viscosity; Radiation induced

polymerization; 9257.

Radiation properties; Reflectance; Spectral emittance; Spectral

reflectance; Thermal radiation; Total emittance; Emissivity;

Emittance; High temperature reflectance; Infrared

reflectance; TN292.

Radiation pyrometry; Temperature; Thermometry; Thermocouples; Thermistors; Resistance thermometer; Mono. 27,

Supplement 2. Radiation sound; Sound waves; Earthquakes, radiation sound;

Ionospheric motions: 9225.

Radiation thermometry; Standards; Temperature; Infrared pyrometer; International Practical Temperature Scale; Optical pyrometer; 9343.

Radiative; Spectra; Theory; Vacuum-ultraviolet; Atomic: Colli- sions: Continuous; Deexcitation; He; Hes: Metastable; 936 7. Radiative cooling; Roofing, built-up; Deterioration; Insulation; 9172.

Radiative cooling: Roofing research; Solar heating: Liquid-applied coatings; Membrane movements: Prefabricated sheets; 9432.

Radiative cooling; Solar heating; Built-up roofing; Deterioration

insulation; 9249.

Radiative lifetimes; Spectroscopy; Atomic spectra; Energy

levels: Iron; Iron, lifetimes in; Lifetimes in Fe \;J. 71A 6-472,

567-573(1967).

Radiative recombination; Compensated GaAs; Epitaxial GaAs

lasers; Fermi levels: 9518.

Radiative recombination; Silicon: Space charge regions; Gallium

arsenide; Germanium; P-n junctions; 9519.

Radiator, piston; Sound; Acoustics; Diffraction, potential;

Piston radiator; Potential diffraction; 9319.

Radiator ratings; Radiator sizes; Cast iron radiators: Radiators,

cast iron: SPR174-65.

Radiators, cast iron; Radiator ratings; Radiator sizes; Cast iron

radiators; SPR 174-65.

Radiator sizes; Cast iron radiators; Radiators, cast iron; Radiator ratings: SPRl 74-65. Radicals; Rydberg levels; Vacuum monochromators; Autoionization; Electronic: Excited states; H>0+; NH3+; NH2+;

OH+ ions; Heats of formation: Ionization thresholds; J. 70A

6-417,459-463 (1966).

Radioactive carbohydrates; Use of heavy papers in preparative

chromatography; Chromatography on seed-test paper;

Large-scale paper chromatography: /. 71A 1-436, 49-52

(1967).

Radioactive carbohydrates; Synthesis of radioactive sugars;

Carbon- 14 labeled L-fucose; L-fuconic acid-7-'^C: L-fucose

/-"C; J. 11X2-444. 133-136 (1967).

Radioactive decay: Thermal conductivity; Heat conduction;

Heat generation: Heat transfer: Neutron absorption; J. 71C

4-260,293-298(1967).

Radiochemical laboratories; 14 MeV neutron generator: 100

MeV-40 KW LINAC; Clean room; Computers; Counting

rooms; Feedback analysis; Optimization of variables 10 MW

nuclear reactor; Pneumatic tubes: 9154.

Radiochemical separations: Theoretical detection limits for ac- tivation analysis; CLSQ program for multicomponent decay;

Solid state detectors; Electronic data handling: NBS reactor; NBS Linac; Cockroft-Walton generator: Digital computers;

Activation analysis; TN404.

Radio communications: Radio receivers: Transistors; Modulators; TNIOO-A, Supplement to Appendix C ofTNlOO.

Radio frequency power; Coaxial; Flow calorimeter; J. 71C

2-250, 111-117(1967).

181
Radioisotope dilution; Substoichiometry by controlled potential

coulometry; Radiochemical separations; Theoretical detection

limits for activation analysis; CLSQ program for multicomponent decay; Solid state detectors; Electronic data handling;

NBS reactor; TN404.

Radiolysis; Free radicals; Ion-molecules reactions; Neopentane;

Photolysis; 9180.

Radiolysis; Hydrocarbons; Ion-molecule reactions; 9273.

Radiometer; Cryogenic noise source measurements;

Microwave; Noise source measurements; 9150.

Radiometer; Sensitivity; Switching; Dicke; Microwave; J. 71C

2-252, 127-152(1967).

Radiometric calibration; Radiometry; Laser; Laser energy measurement; Optical attenuator; Photoelectric photometry;

TN418.

Radiometric trace chromatography; Radioisotope dilution; Substoichiometry by controlled potential coulometry;

Radiochemical separations; Theoretical detection limits for activation analysis; CLSQ program for multicomponent

decay; Solid state detectors; TN404.

Radiometry; Laser; Laser energy measurement; Optical at- tenuator; Photoelectric photometry; Radiometric calibration; TN418.

Radiometry; Sources; Spectral radiance; Blackbodies;

Non-blackbody emission; Optical radiation; 9344.

Radio receivers; Transistors; Modulators; Radio communications; TNIOO-A, Supplement to Appendix C of TNI 00. Radio science; World days service; 9189.

Radio service; Satellites and space probes; Space and satellites; 9233.

Radius of gyration; Relaxation; Statistical-bead model; Autocorrelation; Correlation; End-to-end length; Fokker-Planck equation; Polymer chain dynamics; 9515.

Railroads; Scheduling; SIMSCRIPT; Simulation; Sorting;

Freight operations; GPSS; 9427.

Raman spectra; Data; Force constants; Infrared spectra; Modes

of vibration; Molecular vibrational frequencies; Molecular

spectra; NSRDS-NBSl 1. Random; Ratio; Systematic; Sum; Approximation; Error; For- mula; Imprecision; Law of error; Products; Propagation of er- ror;^. 70C 4-23 7,263-273 (1966).

Random error; Systematic error; Sodium nitroprusside; Iron compounds; Optical Mossbauer spectrometer; Tandem Mossbauer spectrometer; Velocity calibration; Mossbauer; Spectroscopy; Standard; Differential chemical shift; Quadrupole

splitting; M260-13.

Random walk; Adsorption; Chain polymer; Critical energy;

Generating function; Lattice model; Partition function; J. 70B

4-185,237-247 (1966).

Rank; Algorithm; Matrix; Block; J. 70B 3-183, 219-220 (1966).

Rare earth; Atomic spectroscopy; Electronic energy levels; Neutral atom; Promethium;^. 7IA 6-475, 587-599 (1967).

Rare earth; Sliding spark discharge lamp; Spectrum; Atomic

energy levels; Isoelectronic sequence; Praseodymium; 7. 71A

6-474,583-585 (1967).

Rare-earth; Spin-lattice relaxation; 9236.

Rare earths; Series; Calculation; Ionization; Neutral; 9384.

Rare-earth spectra; Spectra, far ultraviolet; Transition probabilities; Atomic spectra; Multiplet tables; 9210.

Rare gas matrix; Spectrum; Hydrogen bromide; Hydrogen

chloride; Infrared; 9359.

Rate; Vacuum ultraviolet; Acetylene; Combination; Ethane;

Ethylene; Flash photolysis; Gas phase; Hydrogen; Hydrogen

deuteride; Insertion; Methane; Methyne; 9286. Rate constant; Activation-energy; Atom-transfer reaction; Car- bon dioxide; Carbon monoxide; Gas phase; Hydrogen atom;

Hydroxyl-radical; 9328. Rate constants; Reactions; Tables; Activation energies; Arr- henius equation; Bimolecular; Chemical kinetics; Data; Gas;

NSRDS-NBS9.

Rates; Spectrometry; Atoms; Mass; Mechanisms; Nitrogen;

Olefins; 9329.

Ratio; Resistor; Four-terminal; Resistance decade; Transresistance; LIRS (universal ratio set); VERI (versatile ratio in- strument); DRRS (direct reading ratio set); Junction; Preci- sion measurements; 7. 70C 3-228, 169-172 (1966).

Ratio; Safety; Standards enclosure; Transformer; Voltage-divider; Voltmeter; Alternating-current; Calibration;

Direct-current; High-voltage; TN349.

Ratio; Standards; Voltage; Volt box; Calibration; Console;

Electrical; Measurement; 7. 70C 3-229, 173-185 (1966).

Ratio; Systematic; Sum; Approximation; Error; Formula; Imprecision; Law of error; Products; Propagation of error; Ran- dom; 7. 70C 4-237, 263-273 (1966).

Ratio transformer; Attenuator; Bridge; High frequency; Inductive voltage divider; 7. 71C 2-249, 101-109 (1967).

Rayleigh distance; Standard gain horns; Antennas; Calibration;

Comparison; Effective aperture; Electromagnetic horns;

Gain; Measurement; Microwave; Mismatch errors; TN351.

Rayleigh-Jeans equation; Spectral radiance; Wien equation;

Brightness temperature; Color temperature; Effective

wavelength; Infrared and far infrared optical pyrometry;

Planck equation; 9310.

Reactions; Tables; Activation energies; Arrhenius equation;

Bimolecular; Chemical kinetics; Data; Gas; Rate constants; NSRDS-NBS9.

Reactor materials; Ceramics; Lattice defects; Nuclear fuels; Nuclear science and technology; Radiation damage; M285.

Readability; Standards; Symbols; Type faces; Typography;

Visibility; Alphanumeric characters; Displays; Handbook;

Human factors; Legibility; Psychology; M262-2.

Real functions; Inverses; Involutions; 7. 71B 1-192, 19-20

(1967).

Real-time hospital information system; Remote data input; Administration; Hospital data communications; Laboratory;

Nursing station; Pharmacy; 9500.

Reciprocity; Secondary standard; Vibration standard; Air bearing; Ceramic moving element; Electrodynamic shaker;

Piezoelectric accelerometers; 9297.

Recombination; D region; Ionosphere; Negative ions; Photo-detachment; 9252.

Recombination; Shockley theory of e; Silicon radiation detectors; Trapping; Energy, required to create an electron-hole

pair; Low temperature; 9299.

Recombination coefficient; Brush-cathode plasma;

Collisional-radiative recombination; Helium afterglow; 9371.

Recovery; Stress; Relaxation; BKZ theory; Constant rate of

strain; Creep; Elastic fluid; Nonlinear behavior; Polyisobutylene;7. 70A 6-423, 525-532 (1966).

Recrystallization; Rubber; Slow melting; Stark rubber; Crystal

size; Crystallized rubber; Heating rate; Melting range; Melting temperature; Oriented; Partial melting; 7. 71 A 3-455,

225-229(1967).

Recurrence methods; Special functions; Chebyshev series; Dif- ference equations; Error analysis; Miller algorithm; 7. 718

2&3-206, 111-129(1967).

Recurrence relations; Special functions; Chebyshev series; Dif- ference equations; Error bounds; Miller algorithm; 7. 71B

4-238, 161-166(1967).

Redacting; Abstracts; Editing; Journals; Publishing; 9280.

Reference-intensities; Standard; Structure; X-ray diffraction; Constants; Crystal; Lattice; Measurements; Powder-patterns;

Mono. 25, Section 5. Reference magnets; Calibration, permanent magnet standards;

Magnet standards; Permanent magnet standards; 9245.

Reference material; Gross heating value; Methane; Heating

value; Heat of combustion; TN299.

Reference material; Resistivity; Standard; Thermal conductivity; Conductivity; Electrical conductivity; Electrical resistivi182
ty; Heat conductivity; Lorenz function; Platinum; J. 71C

4-258.255-284(1967).

Reference specimens; Dielectric constant; Dissipation factor; Frequency; Fluorinated ethylene-propylene; Humidity;

Polycarbonate; Polyethylene; Polyd ,4-cyclohexylenedimethylene terephthalate); Polystyrene; J. 71C 2-251

,

119-125(1967).

Reflectance; Compilation; Cryogenic; Infrared; Metals; TN348.

Reflectance; Contrast; Crispening; Lightness; Munseil value; 9410.

Reflectance; Reflectance factor; Symbols; Transmittance;

Transmittance factor; Absorptance; Contrast; Modulation;

Notation; Optical density; Propagance; 9373.

Reflectance; Spectral emittance; Spectral reflectance; Thermal

radiation; Total emittance; Emissivity; Emittance; High temperature reflectance; Infrared reflectance; Radiation properties; TN292.

Reflectance; Specular walls; Thermal radiation; V-grooves; J. 70C 4-238,275-280(1966).

Reflectance factor; Symbols; Transmittance; Transmittance factor; Absorptance; Contrast; Modulation; Notation; Optical

density; Propagance; Reflectance; 9373.

Reflectance measurements; Thermal radiation; Computational

methods; Emissivity; Emittance measurements; Radiant heat

transfer; 9303.

Reflection of x-rays; Soft x-rays; X-rays; Fibers; Microfocus

tubes; Microradiography; Nylon; Polyacrylonitrile; Polyamides; 9488.

Reflectometer; Microwave; Impedance; Measurements; J. 70C

3-227, 165-168(1966).

Reflectometer; RF power; Coaxial; Coupler; Directional; 9333.

Refractive index; Annealing; Density; Glass; Hydrostatic compression; Polarizability; 9510.

Refractive index; Dispersion; Fused silica; Infrared materials; Optical materials; 9190.

Refractive index; Optical glasses; Radiation effects; 9358.

Refractive index; Spectroscopy; Dielectric constant; Electric dipole moments; Gas phase; Microwave; Microwave abson>-

tion; Molecular beam; Permittivity; NSRDS-NBSIO.

Refractive index; Surface films; Complex refractive index; Ellipsometry; Mercury; Optical constants; 9509.

Refractory compounds; Aluminum borides; Boron; Boron car- bide; Carbon; Fluorine; Heat of combustion;

Polytetrafluoroethylene (Teflon); 9270.

Refractory compounds; Thermodynamic; Vaporization; Enthal- py; Heavier elements; Literature survey; 9153.

Refrigeration; Claude; Cryogenics; TN354.

Regular representation; Commutator; Matrix; Orthogonal;

Quaternions; Skew-symmetric; J. 718 1-196, 43-46 (1967).

Reinforced concrete construction; Reinforcement bars; Wire bar

supports; Bars, concrete reinforcement; Concrete construction, supports; PS7-66.

Reinforcement bars; Wire bar supports; Bars, concrete rein- forcement; Concrete construction, supports; Reinforced

concrete construction; PS7-66.

Relative error; Round-off; Evaluation; Newton form; Polynomial;y. 71B 1-191. 11-17(1967).

Relaxation; BKZ theory; Constant rate of strain; Creep; Elastic

fluid; Nonlinear behavior; Polyisobutylene; Recovery; Stress;

J. 70A 6-423, 525-532 (1966).

Relaxation; Simulation; Distribution; End-to-end length; Lattice model; Monte Carlo; Polymer chain dynamics; 9514.

Relaxation; Statistical-bead model; Autocorrelation; Correlation; End-to-end length; Fokker-Planck equation; Polymer

chain dynamics; Radius of gyration; 9515.

Relaxation; Transition probabilities; Exponential relaxation; Master equation; Moments; Probability distributions; 9527.

Relaxation oscillator; Rotatable document bin array; Seat belt webbing abrasion; Abrasion resistance testing; Automatic

document distribution; Flexible tubing pump; Inverting amplifiers; Laser beam phase shift; Laser heterodyning; Liquid

metering pump; TN437.

Relaxation processes; Stochastic processes; Harmonic oscilla- tors; Master equation; Nonequiiibrium processes; Nonlinear

relaxation; 9402.

Relaxation time; Spin saturation; Electron static susceptibility;

Lattice-bath; Neodymium ethylsulfate; 9291.

Relaxation time; Ti; Analyzer; Cryogenics; Hydrogen; Instru- ment; Instrumentation; Liquefier; Liquid hydrogen; Measurement; Nuclear spin relaxation time; Ortho-para; 9486.

Relaxation times; Two-relaxation time model; Volume relaxation; Annealing; Borosilicate crown glass; Glass; Index of

refraction; J. 71A 3-456, 231-238 (1967).

"releasing agents" in flame emission and atomic absorption;

Magnesium; Ferrous SRMs; Stoichiometric mixtures uranium

oxide; Isotope ratio determination; Spectrophotometric titra- tion; Controlled potential coulometric; Molybdenum;

Homogeneous precipitation; TN402.

Relevance; Testing of information systems; Effectiveness;

Evaluation; Performance; TN297.

Reliability; Rubidium; Stability; Aging; Calibration (USES);

Frequency standards; Gas cells; Performance (long term);

TN341.

Remote data input; Administration; Hospital data communications; Laboratory; Nursing station; Pharmacy; Real-time

hospital information system; 9500.

Remote positioner; Rotary switches; Vibrating-reed electrometer; 9471.

Representation-mixing; Sum-rules; Vector current; Axial-vector

current; Chiral; G^; G*; 9353.

Representations; Free products; Groups; 9348.

Reproducibility of germanium resistors; Thermal cycling at low

temperature; Thermometry; Germanium resistors; Germanium resistor reproducibility; Low temperature thermometry;

J. 70C 4-235, 245-254 (1966).

Research; Amalgam; Dental; 9495.

Residual (configurational) entropy; Thernodynamic properties;

Annealed glass; Crystal; Diethyl phthalate; Glass transformation; Heat capacity calorimetry; Molecular configurational

state; Normal and supercooled liquid; J. 71A 4-461 , 293-305

(1967).

Resin; Silane; Teeth; Bonding; Coupling agent; Denture;

Plastic; Porcelain adhesion; 9494.

Resin sintered coatings; TFE-fluorocarbon; Coatings, dry

film; Dry film lubrication; Polytetrafluoroethylene; CS274-66.

Resin skived tape; Skived tape; TFE-fluorocarbon; Electrical tape, plastic; Plastic tape; Polytetrafluoroethylene; PS3-66.

Resistance; Dielectric resistance; Resistivity; Dielectric constant; Permittivity; Dissipation factor; Loss index; Dielectric

strength; Arc resistance; Tracking; Measurements; Electrical

testing; Conductance; Dielectric conductance; Conductivity;

9174.

Resistance; Resistivity; Conductance; Conductivity; Dielectric; Measurements; 9198.

Resistance decade; Transresistance; URS (universal ratio set); VERI (versatile ratio instrument); DRRS (direct reading ratio

set); Junction; Precision measurements; Ratio; Resistor;

Four-terminal; J. 70C 3-228. 169-172(1966).

Resistance gage; Ultrasonics; Electrical connector; Feedthrough; High pressure; 9526.

Resistance thermometer; Radiation pyrometry; Temperature; Thermometry; Thermocouples; Thermistors; Mono. 27,

Supplement 2. Resistivity; Conductance; Conductivity; Dielectric; Measurements; Resistance; 9198.

Resistivity; Dielectric constant; Permittivity; Dissipation factor; Loss index; Dielectric strength; Arc resistance; Tracking;

Measurements; Electrical testing; Conductance; Dielectric

183
conductance; Conductivity; Volume conductivity; Insulation

conductance; 91 74. Resistivity; Standard; Thermal conductivity; Conductivity;

Electrical conductivity; Electrical resistivity; Heat conductivity; Lorenz function; Platinum; Reference material; J. 71C

4-258, 255-284 (1967).

Resistivity; Thermal conductivity; Armco iron; Conductivity;

Electrical conductivity; Electrical resistivity; Heat conductivity; Heat transfer; Iron; Lorenz function; J. 71C 4-259,

285-291 (1967).

Resistor; Four-terminal; Resistance decade; Transresistance;

URS (universal ratio set); VERl (versatile ratio instrument);

DRRS (direct reading ratio set); Junction; Precision measurements; Ratio;y. 70C 3-228, 169-172 (1966).

Resolving power; Correlation; Lens design; 9407.

Resonance; Strontium titanate; Vacancies; Young's modulus;

Internal friction; Lanthanum titanate; Phase change; 9447.

Resonance; Thallium; Atomic beam; Frequency shift; Radiation

field; TN346.

Resonance lamp; Vacuum ultraviolet; Window seal; Electric discharge; 9279.

Resonances; Scattering; Angular difference; He. He"; Inelastic scattering; 9404.

Resonances; Spurious; Symmetry breaking; U(12) theory;

Baryon; Branching ratio; Decay; Decay width; Meson; 9166.

Resonances; Vibrational excitation; Electron scattering; Ho,

H ,-; 9365.

Resonance scattering; Theoretical; Unimolecular dissociation; Activated complex; Activated molecules; Activated state; Decay; Dissociation; High pressure rate constant; Kinetics;

Lifetime; Mass spectra; Metastable molecules; Predissociation; 9366.

Response; Yields; Detector; Efficiency; Four-pi; Halpern;

Neutron; Photoneutron; TN416.

Restrained sphere; Rotating cylinders; Standard; Standard

reference material; Viscosity; Viscosity standard; Beam bending; Fiber elongation; Glass; Glass standard; Glass viscosity;

Lead-silica glass; M260-1 1

Review; Carbon monoxide; Spectrum; NSRDS-NBS5.

Review of bond literature; Bond in pullouts and beams; Bond

strength; Deformed reinforcement; 9160.

RF connector; Coaxial techniques; Precision coaxial measurements; 9381.

RF power; Coaxial; Coupler; Directional; Reflectometer; 9333.

RF transition; Zeeman effect; HoCO; Magnetic hyperfine struc- ture; 9412.

Rhenium; Chemisorption; Field emission; Nitrogen; 9340.

Rhenium; Sticking coefficient; Surface coverage; Adsorption

kinetics; Nitrogen; 9394.

Rigid disks; Rigid spheres; Thermal conductivity; Transport

coefficients; Triple collisions; Viscosity; Dense gases; 9399.

Rigid-rotor, high temperatures; Thermodynamic properties;

Thermodynamics, rigid-rotor; 9263.

Rigid spheres; Thermal conductivity; Transport coefficients; Triple collisions; Viscosity; Dense gases; Rigid disks; 9399.

Rigid spheres; Thermal conductivity; Transport properties; Tri- ple collisions; Viscosity; Dense gases; 9400.

Ritz; Silicon; Spectrum; Standards; Ultraviolet; Vacuum;

Wavelengths; Carbon; Copper; Germanium; 9338.

Role of government; Role of private enterprise; Technology;

World trade; Developing countries; International standards;

M284.

Role of private enterprise; Technology; World trade; Developing countries; International standards; Role of government;

M284.

Roofing, built-up; Deterioration; Insulation; Radiative cooling;

9172.

Roofing membrane; Strength properties; Development; BSS9.

Roofing research; Solar heating; Liquid-applied coatings; Membrane movements; Prefabricated sheets; Radiative cooling;

9432.

Rotary switches; Vibrating-reed electrometer; Remote posi- tioner; 9471

Rotatable document bin array; Seat belt webbing abrasion;

Abrasion resistance testing; Automatic document distribution; Flexible tubing pump; Inverting amplifiers; Laser beam phase

shift; Laser heterodyning; Liquid metering pump; Optical

refractive index; TN437.

Rotating cylinders; Standard; Standard reference material; Viscosity; Viscosity standard; Beam bending; Fiber elongation; Glass; Glass standard; Glass viscosity; Lead-silica glass;

Restrained sphere; M260-1 1

Rotation; Acetylene; CH; Chemiluminescence; Cross section; Emission spectrum; Energy transfer; Experimental; Gas; Oxygen atom; Oxidation; Population distribution; 9288.

Rotational analysis; Vacuum-ultraviolet region; Absorption

spectrum; CO; Diatomic spectrum; Electronic transition; 9403.

Rotational level; Vibrational state; 337-micron CN laser; Laser;

Radiation; 9163.

Rotation of the earth; Westward drift; Core-mantle coupling;

Decade fluctuations; Dynamo theory; Earth's core; Geomagnetism; TN358.

Round-off; Evaluation; Newton form; Polynomial; Relative er- ror;y.71B 1-191. 11-17 (1967).

Rubber; Slow melting; Stark rubber; Crystal size; Crystallized

rubber; Heating rate; Melting range; Melting temperature;

Oriented; Partial melting; Recrystallization; J. 71A 3-455,

225-229 (1967).

Rubber; Specific heat; Butadiene-acrylonitrile copolymer; Butadiene-styrene copolymers; Crystallization of rubber;

Elastomers; Polybutadiene; Polyethylene; Polyisobutylene;

9520.

Rubidium; Stability; Aging; Calibration (USES); Frequency

standards; Gas cells; Performance (long term); Reliability;

TN341.

Rutile; Thermal expansion; Anisotropic crystal; Gruneisen's

constant; Interferometer; 7. 71A 5-466, 363-369 (1967).

Rydberg; Threshold energies; Autoionization; 1,2-dideuteroethylene; Ethylene; Mass spectra; Photoionization; 9281.

Rydberg levels; Vacuum monochromators; Autoionization;

Electronic; Excited states; H2O+; NH3+; NH2+; OH+ ions; Heats of formation; Ionization thresholds; Mass spectrometer; J. 70A 6-417, 459-463 (1966 ).

s

Safety; Standards enclosure; Transformer; Voltage-divider;

Voltmeter; Alternating-current; Calibration; Direct-current;

High-voltage; Ratio; TN349.

Saha equilibrium; Spark; Spectrochemical analysis; Spectro- , scopic source; Arc; Boltzmann equilibrium; Excitation; : Ionization; Line intensity; 9361 . a Sampling; Standard sample; Volatile content; Ash content; Ele- mental analysis; Homogeneity; Lithium content; Molecular

weights; Polymer; Preparation; Purity; J. 71A 1-435, 43-47

(1967).

Sanitary ware; Sheet steel; Abrasion resistance; Chemical re- sistance; Porcelain enamel; PS5-66.

Sapphire; Aluminium oxide; Dislocations; Electron microscopy;

Grain boundaries; Impurities; 9430.

Satellite; Synchronization; Time and frequency dissemination;

VHF; VLF; HE; Noise; TN357.

Satellites and space probes; Space and satellites; Radio service; 9233.

184
Saturated standard cells; Standard cells calibration; Statistics; Voltage standard; Control charts; Experiment design; TN430.

Saturation factor; 4-3m symmetry; Angular dependence; Hexadecapole; Hexadecapole transitions; Phonon interactions; 9357.

Saturation magnetization; Vibrating-sample magnetometer;

Ferro- and ferrimagnetism; Magnetization; Magnetometer

calibration; Measurement of magnetization; J. 70C 4-236. 255-262 (1966).

Scaling of color; Color; Gloss; Light; Perception of color; Photometry; Physiological optics; Psychophysics; 9336.

Scandium oxide; Boric oxide; Liquid immiscibility; Oxide

systems; Phase diagram; 9476.

Scanning electron microscopy; Electron backscatter; Cathodoluminescence; Electron probe; Microanalysis; X-ray

spectrometry; TN278.

Scattering; Angular difference; He, He"; Inelastic scattering; Resonances; 9404.

Scattering chamber; Semiconductor detectors; Detector

telescope; Large area detectors; Photonuclear physics ap- paratus; 9298.

Scattering cross section; Slit correction; Small-angle x-ray scat- tering; Distribution of intensity; Integral equation; J. 70A

6-419, 467-471 (1966).

Scattering functions; Cloud physics; Infrared light; Light scat- tering; Mie Theory; 9228.

Scheduling; SIMSCRIPT; Simulation; Sorting; Freight operations; GPSS; Railroads; 9427.

Scheelite structure; Single crystal; X-ray back-reflection; Calci- um molybdate; Crystal orientation; Crystallographic groups;

Interplanar angles; Physical properties; J. 70A5-410, 379-384

(1966).

Schur's lemma; Simultaneous triangularization and diagonalization; Commuting matrices; Group representations; Normal

matrices; y. 71B 2&3-201 .69-71 ( 1967).

Schwinger mass formula; SL)(6)h ; 405 representation; Higher

symmetry scheme; \ quark content; Nonet of 2++ mesons;

9332.

Science comprehension; Space age; Metrology; Modern

technology; 9203.

Scientists and engineers; Standing committee; Technical personnel; Environment; Personnel; Professional environment;

Professional personnel; 9277.

Seal leakage; Valve seat leakage; Leak detection; Leak flow

rates; Leak rates; Leakage through valves; Predicting leak

rates; TN355.

Seat belt webbing abrasion; Abrasion resistance testing; Automatic document distribution; Flexible tubing pump; Inverting

amplifiers; Laser beam phase shift; Laser heterodyning;

Liquid metering pump; Optical refractive index; Programmed

document distribution; TN437.

Secondary standard; Vibration standard; Air bearing; Ceramic

moving element; Electrodynamic shaker; Piezoelectric ac- celerometers; Reciprocity; 9297.

Second breakdown; Semiconductor devices; Thermal breakdown; Transistors; Bibliography; Device reliability; Diodes;

Failure mechanisms; Failure modes; TN431

Second law heat; Slope estimators; Third law heat; Vapor pres- sure; Bias of least squares estimators; Coefficient of variation; Correlated estimators; Enthalpy adjustments; Heat of

vaporization; High temperature chemistry; J. 70A 6-424. 533-539, (1966).

Second order phase transition; Singularities; Pade approximate

fluctuations; Opalescence; X-transitions; Critical phenomena;

Critical point; M273.

Second virial coefficient; Quantum mechanics; Hydrogen;

Equation of state; Statistical mechanics; Intermolecular

potential; TN412.

313-589 0-69— 13

Second virial coefficient; Hard spheres; Quantum statistics; Quantum virial coefficient; 9282.

Sedimentation; Sieve; Standard sieve; Abrasive grain; Accumulation curve; Coated abrasive products; Grain, abrasive;

Micron; Overgrade; PS8-67.

Sedimentation equilibrium; Molecular weight average; Molecular weight distributions; Moments; Polydispersity; Polynomial

representation; J. 71A 1-431, 13-17(1967).

Segs; Basic cut-sets; Cut-sets; Graph theory; Network flows; Mathematics; 7. 71B4-242, 183-186 (1967).

Seismology; Geophysics; Gravity; Ionosphere; 9274.

Self absorption corrections; Standard reference materials; Vanadium in irons and steels; Activation analysis; Biological;

Botanical samples; Carbon in sodium; Cockroft-Walton

generator; Digital computers; Flux monitors; High precision 14 MeV neutron activation; Homogeneity testing; Instru- mentation; NBS Linac; NBS reactor; Photoneutron reactions; TN428.

Self-consistent field; Term values; Wavefunctions; Multiplet

strength; 7. 71A 2-447, 157-162 (1967).

Self-excited pulse repetition; Temperature compensation; Ultrasonics; Velocity of sound; Delay line; Frequency stability;

Gage; High pressure; 9331

Self-reversal; Uranium spectrum; Uranium, spectrum; Spectrum, uranium; 7. 70X4-408.323-324 (1966).

Semiconducting SrTiOa; Superconducting SrTiOa; Critical

fields; Heat capacity; Magnetization curves; 9269.

Semiconductor; Strontium titanate; Bandstructure; Insulator; Magnetic susceptibility; Pauli paramagnetism; 9453.

Semiconductor; Superconducting energy gap; Tunnel junction;

GeTe; 9409.

Semiconductor detectors; Detector telescope; Large area detectors; Photonuclear physics apparatus; Scattering chamber;

9298.

Semiconductor devices; Thermal breakdown; Transistors;

Bibliography; Device reliability; Diodes; Failure mechanisms;

Failure modes; Second breakdown; TN43I

Semiconductor nuclear radiation detectors; Charge carrier

lifetime; Lithium-compensated silicon; 9438.

Semiconductors; Strontium titanate; Superconductivity; 9397.

Semicrystalline; Vacancy; Annealing; Chain fold; Chain rotation; Chain twisting; Defect; Dielectric relaxation; Mechanical relaxation; Polychlorotrifluoroethylene; Polyethylene;

Polymer; 9462.

Sensitivity; Switching; Dicke; Microwave; Radiometer; J. 71C

2-252. 127-152 (1967).

Series; Calculation; Ionization; Neutral; Rare earths; 9384.

Set theory; Classification design; Combinatorics; 7. 71B 1-193. 21-22(1967).

Shaker; Vibration; Accelerometer; Calibration; Comparison

calibration; Frequency range; 9306.

Shear; Shell; Stress analysis; Thin wall; Torsion; Tube; Creep;

Primary creep; 7. 71C 3-256. 209-225 (1967).

Shear modulus; Stainless steel; Antiferromagnetic; Cold work;

Fe-Ni-Cr alloys; Neel temperature; 7. 70C 3-232. 207-210

(1966).

Shear modulus; Young's modulus; Aluminum oxide; Corundum;

Elastic constants; 7. 70A 4-403, 277-280 (1966).

Shear test; Vacuum and pressure test; Adhesives; Boil test; Bonding; Exterior; Grading; Interior; Moisture content; OveHay; Plywood; PSl-66.

Shear viscosity; Temperature dependence; Viscosity of

parahydrogen; Liquid normal hydrogen; Parahydrogen; 9201

Sheet steel; Abrasion resistance; Chemical resistance; Porcelain

enamel; Sanitary ware; PS5 -66. Shell; Stress analysis; Thin wall; Torsion; Tube; Creep; Primary

creep; Shear;7. 71C 3-256, 209-225 (1967).
Shell calculations: Solid solutions: Alkali halides: Heats of solution: Ion substitution: Lattice relaxation: Polarization energy:

9300.

Shielding: Single scatter: Air-scatter: Angular distribution: Energy spectrum: Gamma rays: Neutrons: Point source: 9308.'

Shockley theory of e: Silicon radiation detectors; Trapping:

Energy, required to create an electron-hole pair: Low temperature: Recombination: 9299.

Shrinkage: Strain: Stress: Tensile: Adhesion: Bonding: Dental:

Filling materials: Hardening: 9433.

Sieve: Standard sieve: Abrasive grain: Accumulation curve: Coated abrasive products: Grain, abrasive: Micron: Overgrade: Sedimentation: PS8-67.

Sigma constants in ethanol-water: Substituted benzoic acids: Allyi- and propenylbenzoic acids: Change of pK with dielectric constant: Hammett sigma constants: Ionization constants: pK\ values in ethanol-water; J. 7L\ 5-468. 379-384 i 1 967). Signal lights: Colors: Lights: Mono. 75. Signal noise ratio: Statistical properties: Time intervals: Noise.

signal: Photomultipliers: 9232.

Silane; Teeth: Bonding: Coupling agent: Denture; Plastic; Porcelain adhesion; Resin; 9494.

Silicates: Borates: Glassformers; Immiscibility: Liquid immiscibility: Modifiers, network: Oxide s\stems; 9475.

Silicon: Space charge regions: Gallium arsenide: Germanium:

P-n junctions; Radiati\e recombination: 95/9.

Silicon: Spectrum. Si i; Wavelengths. Si i: .Atomic energy levels; Atomic spectra Si i; First spectrum: Multiplet table: NSRDS-NBS3. Section 2. Silicon: Spectrum: Standards: Ultraviolet; Vacuum;

Wavelengths; Carbon: Copper: Germanium: Ritz: 9338.

Silicon: Sub-halides: Boron: Fluorine; NMR: Polysilanes: 9229.

Silicon density: Substitution balance: Volumetric measurement:

Water density; Water weighing; Airdensit\': Balance: Balance

calibration: Balance equilibrium; Balance sensitivity: Density;

Double substitution weighing; i. 71C 3-254. 179-198 (1967).

Silicon uiodes: Visible radiation; Hot electrons: 9458.

Silicon i: Silicon spectra: Vacuum ultraviolet standards: Atomic

spectrum of silicon: Carbon spectra: Electrodeless discharge;

Germanium spectra: Nitrogen spectra: 9337.

Silicon radiation detectors: Trapping; Energy, required to create an electron-hole pair; Low temperature: Recombination:

Shockley theory of e: 9299.

Silicon spectra; Vacuum ultraviolet standards; Atomic spectrum

of silicon: Carbon spectra; Electrodeless discharge: Germanium spectra: Nitrogen spectra; Silicon i: 9337.

Silver: Crystal growth; Dendrite; Electrocrystallization: Elec- trodeposited crystals: Electrodeposited dendrites; 9422.

Silver: Sub-stoichiometric radioisotopic dilution analysis: Trace

amounts: Cadmium: Diihizone: 9168.

Silver oxide; Dissociation by heat: Entropy: Equilibrium; Heat

of reaction: Oxygen pressures: 9377.

Silver-tin alloy: Stacking fault energy; Dislocations: Extrinsic

faults: 9459.

Silver-tin alloy; Stacking-fault energy: Dislocations; Electron

microscopy: 9501

Silver-tin alloys; Spherical alloy; Spherical-alloy amalgam;

Adaptability: Amalgams; Dental amalgam: Dentistry: Mercury-silver alloys: Packing pressure: Particle size; 9448.

Silver-tin allo\'s; Stacking-fault energy: Stacking faults: Dislocation nodes; Dislocations: Electron microscopy; 9502.

Similar types; Tabulation: Basing connections: Characteristics:

Electron tubes; H103.

Simplified approximate solutions: Thin plates: Bassali's theory:

Concentric loading: Circular plates: Deflection: Elasticity:

Experimental: Flexure: Point supports: J. 70C 4-234, 227-244

{1966).

Simply connected; Topology; 3-manifold: 3-sphere; Free group:

Handlebody: Homeomorphism: J. 71B 2&3-197, 53-56

(1967).

SIMSCRIPT; Simulation: Sorting; Freight operations: GPSS:

Railroads: Scheduling: 9427

Simulation: Distribution: End-to-end length; Lattice model:

Monte Carlo: Poh mer chain dynamics: Relaxation: 9514.

Simulation: Sorting: Freight operations: GPSS: Railroads;

Scheduling: SIMSCRIPT; 9427.

Simulation; Tufted carpet mill: Industrial dynamics: 9523.

Simultaneous: Three-circle: X ray: Diffraction; Diffractometer; Neutrons: 9524.

Simultaneous determination copper; Cobalt; "releasing agents"

in flame emission and atomic absorption; Magnesium; Ferrous SRMs; Stoichiometric mixtures uranium oxide; Isotope ratio determination; Spectrophotometric titration: Controlled

potential coulometric; TN402.

Simultaneous triangularization and diagonalization: Commuting

matrices; Group representations: Normal matrices: Schur's

lemma:7. 71B2c£i-207, 69-71 (1967).

Sine-wave comparison signal: Correlation radiometer: Differential time delay: Gain fluctuations; Imperfect multiplier:

Noise comparison: Nonidentical amplifiers; J. 71C 2-253,

153-170(1967).

Single crystal: .Antiferromagnetic; EPR: G value: K-band spec- trometer: NiBr.; 9419.

Single cr\stal; Calcium mohhdate: Dielectric constant; Lead

molybdate: 9434.

Single crystal: Velocity of sound: Uranium dioxide: Compressibility: Elastic constants; Elastic compliances: 9173.

Single crystal: X-ray back-reflection: Calcium molybdate;

Crystal orientation; Crystallographic groups; Interplanar angles: Physical properties; Scheelite structure: J. 70A 5-410,

379-384(1966).

Single-crystal CaF^: Calcium fluoride: Elevated-temperature

emissivity: Infrared absorption coefficients: Infrared emissivity: Polycrystalline CaF2: 9312.

Single crystal ice; Speed of sound: Thermod\ namic properties:

Elastic constants: Lattice dynamics: Lattice parameter

changes: 9383.

Single crystal planes: Work function: Energy distribution: Field

emission: Patch fields: 9423.

Single crystals: Temperature gradient zone melting; Traveling

solvent: Calcium molybdate: Crystal growth: Lithium sulfate: 9496.

Single cr\stals; Zone refining: Fermi surface; Magnetoacouslic

absorption; Potassium; 9797.

Single particle shell model; Eigenvalues: Eigenfunctions: Energy

levels; Wave functions; T.\4I0.

Single scatter: ,Air-scatter: Angular distribution: Energy spec- trum: Gamma rays: Neutrons; Point source; Shielding; 9308.

Singularities: Pade approximate fluctuations: Opalescence:

X-transitions: Critical phenomena: Critical point; Second

order phase transition: M273.

Skew-symmetric; Regular representation; Commutator; Matrix;

Orthogonal: Quaternions: i. 71B 1-196. 43-46 (1967).

Skived tape: TFE-fluorocarbon: Electrical tape, plastic: Plastic tape; PoU tetrafluoroethylene; Resin skived tape: PS3-66.

Slabs: Slate; Standard sizes: Thickness: Tolerances;

Blackboards; Dimensions: Natural markings: PS2-66.

Slate: Standard sizes; Thickness: Tolerances: Blackboards:

Dimensions: Natural markings; Slabs: PS2-66.

Sliding spark discharge lamp: Spectrum: Atomic energy levels: Isoelectronic sequence: Praseodymium; Rare earth; J. 71A

6-474,583-585 (19671.

Slit correction; Small-angle x-ray scattering: Distribution of intensity; Integral equation: Scattering cross section: J. 70A

6-419. 467-471 (1966).

186
Slope estimators; Third law heat: Vapor pressure; Bias of least squares estimators; Coefficient of variation; Correlated esti- mators; Enthalpy adjustments; Heat of vaporization; High

temperature chemistry; 7. 70A 6-424, 533-539, (1966).

Slov/ melting; Stark rubber; Crystal size; Crystallized rubber; Heating rate; Melting range; Melting temperature; Oriented;

Partial melting; Recrystallization; Rubber; J. 71A 3-455,

225-229(1967).

Small-angle x-ray scattering; Distribution of intensity; Integral

equation; Scattering cross section; Slit correction; J. 70A

6-419, 467-471 (1966).

Smoothing; Continuous function; Fourier series; Piecewise; 7. lie 2-248, 93-100(1967).

Sn02-lr02 system; Solid solution; Ti02-lr02 system; Dissociation; Phase relations; 7.71 A 2-44/, 1 1 9-1 23 ( 1 967).

Sodium; Alkali halides; Aqueous; Chloride; Color centers; Conductivity; Crystal growth; 9182.

Sodium; Spin-exchange; Electron; Optical pumping; 9275.

Sodium chloride; Vapor pressure of aqueous solutions; Calcium

chloride; Isopiestic measurements; Mixed salt solutions; J. 70A 4-406, 313-318 (1966).

Sodium nitroprusside; Iron compounds; Optical Mossbauer

spectrometer; Tandem Mossbauer spectrometer; Velocity

calibration; Mossbauer; Spectroscopy; Standard; Differential chemical shift; Quadrupole splitting; Random error; Systematic error; M260-1 3. Sodium nitroprusside; Standardization; Crystal structure; Differential chemical shift; Mossbauer spectroscopy; Quadrupole

splitting; 9238.

Soft x-rays; X-rays; Fibers; Microfocus tubes; Microradiography; Nylon; Polyacrylonitrile; Polyamides; Reflection of

x-rays; 9488.

Soft X-ray spectrum; Ag; Cu; Double electron photoexcitation;

Ni; Photoemission; 9442.

Soil, residual; Cleanability, porcelain enamel surfaces; Fluorescent soils; Porcelain enamel; 9222.

Soil pipe and fittings; Soil pipe dimensions; Cast iron pipe,

requirements; CS188-66.

Soil pipe dimensions; Cast iron pipe, requirements; Soil pipe and

fittings; CS 188-66.

Solar data, geomagnetic; Data, geomagnetic and solar; Geomagnetic solar data; 9181

Solar disk; Spectrum; Chromospheric flash spectrum; Chromospheric spectrum; 9259.

Solar heating; Built-up roofing; Deterioration insulation; Radiative cooling; 9249.

Solar heating; Liquid-applied coatings; Membrane movements;

Prefabricated sheets; Radiative cooling; Roofing research; 9432.

Solar protons; Sporadic-E; Auroral absorption; Auroral radar; Ionospheric disturbances; Polar cap absorption; 9193.

Solar radiation; Spectral distribution; Water vapor concentration; Wavelength; Wavenumber; Aerosol; Air mass; Ozone;

9525.

Solar simulator; Spectroradiometer; Standard of spectral irradi- ance; Integrating sphere; 9256.

Solar spectrum; Wavelengths of solar lines; Elements in sun; Equivalent widths of solar lines; Identification of solar lines; Molecules in sun; Mono. 61

Solid phase; Vacuum ultraviolet; Carbene; Ethylene; Ethylidene; Gas phase; Photolysis; 9415.

Solids; Thermal conductivity; Gases; Liquids; Metals;

NSRDS-NBS8.

Solids mass spectrometer; Electron probe microanalyzer; NBS

white cast iron sample (SRM 1175); Stainless steel powder

metallurgy compact; Optical metallography; Macroanalytical

techniques; Optical emission; X-ray spectrochemical analysis;

M260-12.

Solid solution; Cr20:!-lr02 system; Dissociation; Phase rela- tions; Platinum metal oxides; 9480.

Solid solution; Ti02-lr02 system; Dissociation; Phase relations; Sn02-Ir02 system:y. 71A 2-441. 119-123 (1967).

Solid solutions: Alkali halides; Heats of solution; Ion substitution; Lattice relaxation: Polarization energy; Shell calculations: 9300.

Solid state detectors; Electronic data handling; NBS reactor; NBS Linac; Cockroft-Walton generator: Digital computers;

Activation analysis; Standard reference materials; Photo-neutron reactions; Flux monitors; Cu, Se, Al, V in irons and steels; TN404.

Solid state detectors; Standard reference materials; Tin standard

for chemical shift; Computers; Cross sections; Detection

limits for analysis; Flux monitors; Mossbauer instrumentation; Mossbauer spectroscopy; NBS Linac; Nickel-61;

TN421.

Solid-vapor; Experimental; Helium-methane: Low temperature:

Phase-equilibrium; 9230.

Solid-vapor equilibrium; Low temperature phase-equilibrium;

Methane; Minimum gas phase equilibrium concentration;

Neon: Neon-methane binary system; 9461

Solubility isotherm; Calcium; Hydroxyapatite; Phosphate;

9212.

Solubility of calcium monohydrogen phosphate dihydrate at 37.5 °C; Calcium-phosphate ion-pairs; Solubility of dicalcium

phosphate dihydrate: Solubility of dibasic calcium phosphate

dihydrate; y. 70A 6-426, 545-552 (1966).

Solubility of dibasic calcium phosphate dihydrate; Solubility of

calcium monohydrogen phosphate dihydrate at 37.5 °C; Calci- um-phosphate ion-pairs; Solubility of dicalcium phosphate

dihydrate: 7. 70A 6-426, 545-552 (1966).

Solubility of dicalcium phosphate dihydrate; Solubility of dibasic

calcium phosphate dihydrate: Solubility of calcium

monohydrogen phosphate dihydrate at 37.5 °C: Calcium-phosphate ion-pairs; 7. 70A 6-426, 545-552 (1966).

Solute atoms: Vacancies: Correlation factors: Diffusion; Dilute

alloys; Impurities: Jump frequencies; 9464.

Solute distribution; Thermal convection; Crystal growth; Fused

salts; Magnetic fields: Molten metals; 9513.

Solution: Theory; Diffusion coefficient; Polymer; 9425.

Solvation; Sucrose solutions; Hydration; Mixed solutions; Nonelectrolytes; 9512.

Solvent effects; Substituted phenols; Dissociation constant: Methanol- water mixtures ; 7. 70A 6-42 7, 553-556 (1966).

Solvent effects: Ultraviolet absorption: Carbon tetrachloride; Cyclohexane; Ethylbenzene; Extinction coefficient: Polymer;

Polystyrene: 7. 71A 2-449, 169-175 (1967).

Sonic velocity: Adiabatic compressibility: Hydrogen; 9239.

Sorting; Freight operations; GPSS; Railroads; Scheduling: SIMSCRIPT; Simulation; 9427.

Sound; Acoustics; Diffraction, potential; Piston radiator: Potential diffraction: Radiator, piston; 9319.

Sound waves; Earthquakes, radiation sound: Ionospheric motions; Radiation sound; 9225. Sources; Spectral radiance; Blackbodies; Non-blackbody emission; Optical radiation: Radiometry; 9344.

Space age; Metrology; Modern technology; Science comprehension; 9203.

Space and satellites; Racio service; Satellites and space probes:

9233.

Space charge regions; Gallium arsenide: Germanium; P-n junctions: Radiative recombination: Silicon; 9519.

Spark: Spectrochemical analysis: Spectroscopic source: Arc; Boltzmann equilibrium; Excitation; Ionization; Line intensity;

Saha equilibrium; 9361

Spark cutting; Zone refining; Crystal growth: Fermi surface; Orientation; Potassium; 7. l\K2-443, 127-132 (1967).

187
Spark excitation; Alloys, high-temperature; Ambient air; Argon;

Atmospheres of argon; High-temperature alloys; Nitrogen;

Nitrogen and ambient air; 9235.

Special functions; Chebyshev series; Difference equations; Error analysis; Miller algorithm; Recurrence methods; 7. 71B

2&3-206, 111-129(1967).

Special functions; Chebyshev series; Difference equations; Error bounds; Miller algorithm; Recurrence relations; J. 71B

4-238, 161-166(1967).

Specifications; Standardization activities, U. S.; Standards; Test methods; Certification and labeling plans; Government stan- dardization, U. S.; Specific density; Gravity; 9167.

Specific heat; Butadiene-acrylonitrile copolymer;

Butadiene-styrene copolymers; Crystallization of rubber;

Elastomers; Polybutadiene; Polyethylene; Polyisobutylene;

Rubber; 9520.

Specific heat; Thermodynamic properties; Cryogenics; Dilution

refrigerator; Enthalpy; Entropy; Fermi-Dirac gas; Helium-3;

Helium-4; Liquid; Mixtures; Osmotic pressure; Quantum

fluid; TN362.

Specific heat; Thermodynamic properties; Beryllium aluminate;

Chrysoberyl, drop calorimetry; Enthalpy measurements;

High-temperature calorimetry; Mixed oxides; J. 71A 2-438.

89-95 (1967).

Specific heat; Thermodynamic properties; Beryllium aluminate

(1:3); Drop calorimetry; Enthalpy measurements; High-temperature calorimetry; Mixed oxides; J. 71A 2-439, 97-103

(1967).

Specific heat; Thermodynamic properties; Aluminum

trifluoride; Drop calorimetry, enthalpy measurements;

High-temperature calorimetry; Phase transition; Pretransition

phenomena; J. 71 A i-450, 185-193 (1967).

Specific heat; Thermodynamic function; Density; Heat of

vaporization; Hydrogen; Parahydrogen; 9246.

Spectra, far ultraviolet; Transition probabilities; Atomic spectra;

Multiplet tables; Rare-earth spectra; 9210.

Spectra; Bond distances; Cyanogen; Infrared; Mo.-.ular structure; 9183.

Spectra; Theory; Vacuum-ultraviolet; Atomic; Collisions; Continuous; Deexcitation; He; Hcz; Metastable; Radiative; 9367.

Spectra; Vibrational assignment; Vibrational fundamentals;

Chlorodifluoramine; Infrared spectra; Matrix-isolation; 9294.

Spectral; Molecular; Vibrational; Frequencies; Data; Tables; Force; Constants; A'S/?D5-NB56.

Spectral distribution; Water vapor concentration; Wavelength;

Wavenumber; Aerosol; Air mass; Ozone; Solar radiation; 9525.

Spectral emittance; Spectral reflectance; Thermal radiation; Total emittance; Emissivity; Emittance; High temperature

reflectance; Infrared reflectance; Radiation properties;

Reflectance; TN292.

Spectral emittance; Specular reflectance; Averaging spheres;

Diffuse reflectance; Emissivity; Emittance; Flux averaging

devices; Infrared reflectance; Spectral reflectance; TN415.

Spectral emittance; Thermal radiation; Thoria; Zirconia; Alu- mina; Ceramic oxides; Emittance; Error sources; Magnesia;

Measurement uncertainties; 7. 70A 5-412, 393-415 (1966).

Spectral lines; Ultraviolet; Atomic spectra; Intensities; Mono.

32, Supplement.

Spectral radiance; Blackbodies; Non-blackbody emission; Optical radiation; Radiometry; Sources; 9344.

Spectral radiance; Spectroradiometer; Temperature; Arc; Blackbody; Graphite; 9326.

Spectral radiance; Wien equation; Brightness temperature;

Color temperature; Effective wavelength; Infrared and far in- frared optical pyrometry; Planck equation; Rayleigh-Jeans

equation; 9310.

Spectral reflectance; Spectral emittance; Specular reflectance; Averaging spheres; Diffuse reflectance; Emissivity;

Emittance; Flux averaging devices; Infrared reflectance; TN415.

Spectral reflectance; Thermal radiation; Total emittance; Emissivity; Emittance; High temperature reflectance; Infrared

reflectance; Radiation properties; Reflectance; Spectral

emittance; TN292.

Spectra of technetium; Technetium, spectra of; Wavelengths of

technetium; J. 71A 6-471,547-565 (1967).

Spectrochemical analysis; Spectroscopy; Standard reference

materials; Time-shared computer; X-ray spectroscopy; Analysis; Arc temperature; Atomic absorption spectrometry;

Analog computer; Bibliography; Computer; Electrodeposition; Electron back scatter; TN401

Spectrochemical analysis; Spectroscopic source; Arc; Boltz- mann equilibrium; Excitation; Ionization; Line intensity; Saha

equilibrium; Spark; 9361.

Spectrograph; Spectrometer; Astigmatism; Czerny-Turner;

9401.

Spectrograph; Synchrotron light; Grazing-incidence; 3-meter;

Monochromator alignment; 0.06 A resolution; 9355.

Spectrometer; Astigmatism; Czerny-Turner; Spectrograph;

9401.

Spectrometric; Electron temperature; Langmuir probe; Plasma;

9382.

Spectrometry; Atoms; Mass; Mechanisms; Nitrogen; Olefins; Rates; 9329.

Spectrophotometric titration; Controlled potential coulometric;

Molybdenum; Homogeneous precipitation; Aluminum; Beryllium; Thermoanalytical standards; Tricalcium silicate; Spectrophotometry; Antimony; High precision determination of

nickel; TN402.

Spectrophotometry; Antimony; High precision determination of

nickel; Simultaneous determination copper; Cobalt; "releasing

agents" in flame emission and atomic absorption; Magnesium;

Ferrous SRMs; Stoichiometric mixtures uranium oxide;

TN402.

Spectrophotometry; Thermostat; Ultraviolet-visible; —150 to +60 °C;9i/6.

Spectroradiometer; Standard of spectral irradiance; Integrating

sphere; Solar simulator; 9256.

Spectroradiometer; Temperature; Arc; Blackbody; Graphite;

Spectral radiance; 9326.

Spectroscopic constants; Ab initio electronic calculation; Dipole

moment; Dissociation energy; Electron affinity; Energy; Field

gradient; Magnetic constants; Molecular electronic structure; Orbital energy; Polarizability; Quadrupole moment; T438.

Spectroscopic source; Arc; Boltzmann equilibrium; Excitation;

Ionization; Line intensity; Saha equilibrium; Spark; Spectrochemical analysis; 9361

Spectroscopy; Analytical emission; Atomic absorption; Electrical discharge; Bibliography; Indexed; Flame; M281

Spectroscopy; Atomic absorption spectrometry; Atomic emission spectrometry; Atomic fluorescence spectrometry; Flame

photometry; 9481

Spectroscopy; Atomic spectra; Energy levels; Iron; Iron,

lifetimes in; Lifetimes in Fe i; Radiative lifetimes; J. 71A

6-472,567-573 (1967).

Spectroscopy; Dielectric constant; Electric dipole moments;

Gas phase; Microwave; Microwave absorption; Molecular

beam; Permittivity; Refractive index; NSRDS-NBSIO.

Spectroscopy; Standard; Differential chemical shift; Quadrupole

splitting; Random error; Systematic error; Sodium nitroprusside; Iron compounds; Optical Mossbauer spectrometer; Tan- dem Mossbauer spectrometer; Velocity calibration; Mossbauer; M260-13.

Spectroscopy; Standard reference materials; Time-shared computer; X-ray spectroscopy; Analysis; Arc temperature;

Atomic absorption spectrometry; Analog computer; Bibliog188
raphy; Computer; Electrodeposition; Electron back scatter; Electron probe microanaiyzer; TN401.

Spectroscopy; .Ultraviolet; X-rays; Absorption; Radiation;

9311.

Spectrum, Si i; Wavelengths, Si i; Atomic energy levels; Atomic

spectra Si i; First spectrum; Multiplet table; Silicon; NSRDS-NBS3, Section 2. Spectrum, uranium; Self-reversal; Uranium spectrum; Uranium,

spectrum; J. 70A 4-408, 323-324 (1966).

Spectrum, Yb ii; Ytterbium, second spectrum; Zeeman effect in Yb ii; Analysis of Yb ii; Atomic energy levels of Yb ii; Classified line of Yb ii; J. 71 A 6-470, 396-545 (1967).

Spectrum; Atomic energy levels; Isoelectronic sequence;

Praseodymium; Rare earth; Sliding spark discharge lamp; J. n\6-474, 583-585(1967).

Spectrum; Chromospheric flash spectrum; Chromospheric spec- trum; Solar disk; 9259.

Spectrum; Hydrogen bromide; Hydrogen chloride; Infrared; Rare gas matrix; 9359.

Spectrum; Review; Carbon monoxide; NSRDS-NBS5.

Spectrum; Standards; Ultraviolet; Vacuum; Wavelengths; Car- bon; Copper; Germanium; Ritz; Silicon; 9338.

Spectrum; Vacuum ultraviolet; Absorption; Carbon monoxide;

Forbidden transition; High resolution; 9330.

Spectrum; Vacuum ultraviolet; Atomic spectrum; Calculated

wavelengths; Nitrogen; 9339.

Spectrum of Au iii; Third spectrum; Corrections to analysis of

Au in; Gold;y. 70A 6-418, 465-466 (1966).

Specular reflectance; Averaging spheres; Diffuse reflectance; Emissivity; Emittance; Flux averaging devices; Infrared

reflectance; Spectral reflectance; Spectral emittance; TN415.

Specular walls; Thermal radiation; V-grooves; Reflectance; J. 70C 4-238.275-280(1966).

Speed of sound; Thermodynamic properties; Elastic constants;

Lattice dynamics; Lattice parameter changes; Single crystal

ice: 9383.

Speed of sound; Ultrasonic interferometer; Acoustical ther- mometry; Isotherms below 20 °K; Low temperature ther- mometry; Primary thermometry; 9379.

Sphere; Stability; Crystal growth; Diffusion; Heat flow; Inter- face; Kinetics; Morphology; 9439.

Sphere; Sulfur coatings; Coatings; Infrared integrating sphere

coatings; Integrating spheres; 9157.

Spherical alloy; Spherical-alloy amalgam; Adaptability; Amalgams; Dental amalgam; Dentistry; Mercury-silver alloys;

Packing pressure; Particle size; Silver-tin alloys; 9448.

Spherical-alloy amalgam; Adaptability; Amalgams; Dental amalgam; Dentistry; Mercury-silver alloys; Packing pressure; Particle size; Silver-tin alloys; Spherical alloy; 9448.

Spherical nuclei; Theoretical physics; Nuclear physics;

Photonuclear absorption cross sections; 9214.

Spin-exchange; Electron; Optical pumping; Sodium; 9275.

Spin exchange cross sections; Spin relaxation time; Electron

paramagnetic resonance; Flow system kinetics; Hydrogen

atoms; Nitrogen atoms; 9289.

Spin-lattice relaxation; Phonon bottleneck; Phonon-boundary

scattering; Spin-phonon interactions; Mono. 102.

Spin-lattice relaxation; Rare-earth; 9236.

Spin-phonon interactions; Spin-lattice relaxation; Phonon bot- tleneck; Phonon-boundary scattering; Mono. 102. Spin relaxation time; Electron paramagnetic resonance; Flow

system kinetics; Hydrogen atoms; Nitrogen atoms; Spin

exchange cross sections; 9289.

Spin saturation; Electron static susceptibility; Lattice-bath;

Neodymium ethylsulfate; Relaxation time; 9291.

Spin waves; Tensor permeability; YIG; External tensor permeability; Ferrimagnetic resonance; Ferrites; Garnet; Low magnetic field effects; Permeability; 9395.

Split extension; Factor set; Group extension; Level; Modular

group; Parabolic class number; Quotient surface; 9317.

Splitting failures; Thermal shock; Built-up roof membrane; In- novation; Preventive measures; 9207.

Sporadic-E; Auroral absorption; Auroral radar; Ionospheric

disturbances; Polar cap absorption; Solar protons; 9193.

Spurious; Symmetry breaking; U(12) theory; Baryon; Branching

ratio; Decay; Decay width; Meson; Resonances; 9166.

Square; Trapezoidal; Triangular; Dispersion; Distributions;

Folding; Gaussian; 9398.

Square-edged orifice; Temperature measurement; Temperature

pattern; Diameter ratio; Mixing effectiveness; BSS12.

Stability; Aging; Calibration (USES); Frequency standards; Gas

cells; Performance (long term); Reliability; Rubidium;

TN341.

Stability; Crystal growth; Diffusion; Heat flow; Interface; Kinetics; Morphology; Sphere; 9439.

Stability; Systems of differential equations; Numerical integration; Propagation of error; 7. 71B 2&3-204, 91-103 (1967).

'

Stability of polymers; Degradation; Nonisothermal kinetics; Polymers; Pyrolysis; Thermal decomposition; Thermogravimetry; Thermolysis; J. 70A 6-422, 487-523 (1966).

Stability of polymers; Thermogravimetric analysis; Variation of

the activation energy; Calculation of kinetic parameters;

Determination of activation energies; Preexponential factor; 9192.

Stability of polymers; Thermogravimetry; Energy of activation;

Initial kinetic parameters; Non-isothermal kinetics; Polyethylene; Polymer degradation; 9451.

Stacking fault energy; Dislocations; Extrinsic faults; Silver-tin

alloy; 9459.

Stacking-fault energy; Dislocations; Electron microscopy;

Silver-tin alloy; 9501.

Stacking-fault energy; Stacking faults; Dislocation nodes; Dislocations; Electron microscopy; Silver-tin alloys; 9502.

Stacking faults; Dislocation nodes; Dislocations; Electron

microscopy; Silver-tin alloys; Stacking-fault energy; 9502.

Stainless steel; Antiferromagnetic; Cold-work; Fe-Ni-Cr alloys;

Neel temperature; Shear modulus; J. 70C 3-232, 207-210

(1966).

Stainless steel powder metallurgy compact; Optical metallography; Macroanalytical techniques; Optical emission; X-ray

spectrochemical analysis; Microanalytical techniques; Solids mass spectrometer; Electron probe microanaiyzer; M260-12.

Stainless steels; Steels; Stress corrosion; Atmospheric corrosion

tests; Chemical attack; Cold working; Corrosion; Cracking;

9479.

Stainless steels; Structural steels; Surface hardening; Tempering; Tool steels; Annealing; Case hardening; Chemical composition; Hardening; Heat treatment; Ni-maraging steels; Normalizing; Mono. 88. Standard; Audio frequency; Thermal voltage converter; Inductive voltage divider; Measurement; Phase-angle; TN347.

Standard; Calibration; Microphones; 9342.

Standard; Differential chemical shift; Quadrupole splitting; Ran- dom error; Systematic error; Sodium nitroprusside; Iron compounds; Optical Mossbauer spectrometer; Tandem Mossbauer spectrometer; Velocity calibration; Mossbauer; Spectroscopy; M260-13.

Standard; Standard reference material; Viscosity; Viscosity

standard; Beam bending; Fiber elongation; Glass; Glass stan- dard; Glass viscosity; Lead-silica glass; Restrained sphere;

Rotating cylinders; M260-1 1. Standard; Structure; X-ray diffraction; Constants; Crystal; Lattice; Measurements; Powder-patterns; Reference-intensities;

Mono. 25, Section 5. Standard; Temperature; Graphite arc; Pyrometry; 9346.

Standard; Thermal conductivity; Conductivity; Electrical conductivity; Electrical resistivity; Heat conductivity; Lorenz

function; Platinum; Reference material; Resistivity; J. 71C

4-258,255-284(1967).

189
Standard cell facilities; Standard cell transfer; Standard cells; Volt standard; Electromotive force; 9327.

Standard cells; Thermoelectric; Connector; Electromotive

force; Oil baths; TN353.

Standard cells; Volt standard; Electromotive force; Standard

cell facilities; Standard cell transfer; 9327.

Standard cells calibration; Statistics; Voltage standard; Control

charts; Experiment design; Saturated standard cells; TN430.

Standard cell transfer; Standard cells; Volt standard; Electromotive force; Standard cell facilities; 9327.

Standard frequencies; Time signals; Very low frequency; Broadcast of standard frequencies; High frequency; Low frequency;

M236, 1967 Edition.

Standard frequencies; Time signals; Very low frequency; Broadcast of standard frequencies; High frequency; Low frequency;

9237.

Standard gain horns; Antennas; Calibration; Comparison; Effective aperture; Electromagnetic horns; Gain; Measurement;

Microwave; Mismatch errors; Rayleigh distance; TN351

Standard interior steel doors; Steel door frames, steel doors, in- terior; Interior steel doors; PS4-66.

Standardization; Crystal structure; Differential chemical shift; Mossbauer spectroscopy; Quadrupole splitting; Sodium

nitroprusside; 9238.

Standardization; Testing; Basic and applied research; Calibration; Instrumentation; Interchangeability of parts; Mass

production; 9350.

Standardization activities, U.S.; Standards; Test methods; Certification and labeling plans; Government standardization. U.S.; Specifications; M288.

Standard of spectral irradiance; Integrating sphere; Solar simulator; Spectroradiometer; 9256.

Standard reference materials; Standards; Analysis; Catalog;

Certificate: Characterization; Composition; Price list; Property of material; Purity of material; M260, 1967 Edition.

Standard reference material; Viscosity; Viscosity standard;

Beam bending; Fiber elongation; Glass; Glass standard; Glass

viscosity; Lead-silica glass; Restrained sphere; Rotating cylin- ders; Standard; M260-11.

Standard reference materials; Time-shared computer; X-ray

spectroscopy; Analysis; Arc temperature; Atomic absorption

spectrometry; Analog computer; Bibliography; Computer;

Electrodeposition; Electron back scatter; Electron probe

microanalyzer; TN401.

Standard reference materials, analysis of; Stoichiometry;

Atomic weights; Coulometric analysis; Gas analysis; Mass

spectrometric gas analysis; Microchemical analysis; Polaro- graphic analysis; TN403.

Standard reference materials; Photo-neutron reactions; Flux

monitors; Cu, Se, Al, V in irons and steels; Homogeneity test- ing; Pneumatic rabbit sensor; Mossbauer spectroscopy; Tin

standard for chemical shift; PARLORS program for Mossbauer spectra; TN404.

Standard reference materials; Tin standard for chemical shift; Computers; Cross sections; Detection limits for analysis;

Flux monitors; Mossbauer instrumentation; Mossbauer spec- troscopy; NBS Linac; Nickel-61; PARLORS program for Mossbauer spectra; TN421.

Standard reference materials, analysis; Coulometric analysis;

Gas analysis; Mass spectrometric gas analysis; Microchemical analysis; Null-point potentiometry; Polarographic analysis; TN425.

Standard reference materials; L2-0-isopropylidene-/3-L-idofu- ranose; 2,3-0-isopropylidene-/3-D-threo-pentulofuranose; Air

pollution studies; Characterization of chemical structures; Disaccharide of d-lyxofuranose; TN427.

Standard reference materials; Vanadium in irons and steels; Activation analysis; Biological; Botanical samples; Carbon

in sodium; Cockroft-Walton generator; Digital computers;

Flux monitors; High precision 14 MeV neutron activation; Homogeneity testing; Instrumentation; NBS Linac; NBS

reactor; Photoneutron reactions; Self absorption corrections;

TN428.

Standards; Adhesive industrial; Characteristics; Conductive;

Flooring; Installation; 9177.

Standards; Analysis; Catalog; Certificate; Characterization;

Composition; Price list; Property of material; Purity of material; Standard reference materials; M260, 1967 Edition.

Standards; Exposure; Photography; 9372.

Standards; Standard time scales; Atomic frequency standards; Atomic time; Cesium atomic beam; Frequency and time stan- dards; 9387.

Standards; State-of-the-art; Modules; Nuclear instruments;

Progress; 9209.

Standards; Symbols; Type faces; Typography; Visibility;

Alphanumeric characters; Displays; Handbook; Human fac- tors; Legibility; Psychology; Readability; M262-2.

Standards; Temperature; Blackbody; International Practical Temperature Scale; Optical; Photoelectric pyrometer; Radi- ance sources; 9347.

Standards; Temperature; Infrared pyrometer; International

Practical Temperature Scale; Optical pyrometer; Radiation

thermometry; 9343.

Standards; Test methods; Certification and labeling plans;

Government standardization, U. S.; Specifications; Stan- dardization activities, U.S.; M288.

Standards; Tutorial; Microwave; Attenuation; Measurements;

Mono. 97. Standards; Ultraviolet; Vacuum; Wavelengths; Carbon;

Copper; Germanium; Ritz; Silicon; Spectrum; 9338.

Standards; Voltage; Volt box; Calibration; Console; Electrical; Measurement; Ratio; J. IOC 3-22 9, 173-185 (1966).

Standard sample; Volatile content; Ash content; Elemental

analysis; Homogeneity; Lithium content; Molecular weights;

Polymer; Preparation; Purity; Sampling; 7. 71A 1-435, 43-47

(1967).

Standards enclosure; Transformer; Voltage-divider; Voltmeter;

Alternating-current; Calibration; Direct-current; High-voltage; Ratio; Safety; TN349.

Standard sieve; Abrasive grain; Accumulation curve; Coated

abrasive products; Grain, abrasive; Micron; Overgrade; Sedi- mentation; Sieve; PS8-67.

Standard sizes; Thickness; Tolerances; Blackboards; Dimensions; Natural markings; Slabs; Slate; PS2-66.

Standards-making bodies; Engineering standards; International

and national standards activities; OESLA; 9315.

Standard time scales; Atomic frequency standards; Atomic time;

Cesium atomic beam; Frequency and time standards; Stan- dards; 9387.

Standing committee; Technical personnel; Environment; Per- sonnel; Professional environment; Professional personnel;

Scientists and engineers; 9271

Stannic oxide; High pressure; Line broadening; Mossbauer

spectroscopy; Quadrupole splitting; 9206.

Stark effect; Dense plasma; Line broadening; Plasma diagnostic

techniques; 9195.

Stark rubber; Crystal size; Crystallized rubber; Heating rate; Melting range; Melting temperature; Oriented; Partial melting; Recrystallization; Rubber; Slow melting; J. 71A 3-455,

225-229(1967).

State of the art; Benefit-cost analysis; Transportation

economics; Transport systems; Systems analysis; TN294.

State-of-the-art; Modules; Nuclear instruments; Progress; Stan- dards; 9209.

Statistical-bead model; Autocorrelation; Correlation;

End-to-end length; Fokker-Planck equation; Polymer chain

dynamics; Radius of gyrafion; Relaxation; 9515.

190
Statistical control; Uncertainty; Accuracy; Mass measurement;

Measurement; Measurement process; Precision; Mono. 103.

Statistical dynamics; Statistical mechanics; Coupled harmonic

oscillators; Momentum autocorrelation function; 9389.

Statistical experiment designs; Tournaments; Weighing designs;

Calibration; Calibration designs; Combinatorial analysis; Dif- ference sets; Incomplete block designs; J. 71B 4-237. 149-160

(1967).

Statistical mechanics; Coupled harmonic oscillators; Momentum

autocorrelation function; Statistical dynamics; 9389.

Statistical mechanics; Diffusion coefficients; Momentum cor- relation function; 9376.

Statistical mechanics; Intermolecular potential; Second virial coefficient; Quantum mechanics; Hydrogen; Equation of

state; TN412.

Statistical model; Zirconium hydrides; Beta zirconium hydrides;

9302.

Statistical properties; Time intervals; Noise, signal; Photomultipliers; Signal noise ratio; 9232.

Statistical standards; Automatic data processing equipment;

Confidentiality audits; Disaggregation; Disclosure criteria; Federal statistical system; Inherent computability; Matching;

Probability master samples; Propagation of error computations; 9247.

Statisticians, 1966, 1967; Anniversaries; 9307.

Statistics; Pierre de Fermat; Gregor Mendel; Isaac Todhunter;

Anniversaries; History; Probability; 9156.

Statistics; Voltage standard; Control charts; Experiment design;

Saturated standard cells; Standard cells calibration; TN430.

Status; Future plans; National Standard Reference Data

System; Objectives; Operation; 9283.

Steady-state; Composition; Growth rate; Kinetics; Multicomponent; 9472.

Steel door frames, steel doors, interior; Interior steel doors;

Standard interior steel doors; PS4-66.

Steel plate floors; Burnout tests; Fire endurance; Fire severity;

Floor tests: iB55//.

Steels; Stress corrosion; Atmospheric corrosion tests; Chemical

attack; Cold working; Corrosion; Cracking; Stainless steels; 9479.

Stefan problem; Surface concentration; Surface self-diffusion; Whisker growth; Curtis approximation; Dittmar-Neumann ap- proximation; Mean stay time; 9508.

Sticking coefficient; Surface coverage; Adsorption kinetics; Nitrogen; Rhenium; 9394.

Stochastic processes; Harmonic oscillators; Master equation;

Nonequilibrium processes; Nonlinear relaxation; Relaxation

processes; 9402.

Stoichiometric mixtures uranium oxide; Isotope ratio determination; Spectrophotometric titration; Controlled potential coulometric; Molybdenum; Homogeneous precipitation; Aluminum; Beryllium; Thermoanalytical standards; Tricalcium

silicate; Spectrophotometry; TN402.

Stoichiometry; Atomic weights; Coulometric analysis; Gas analysis; Mass spectrometric gas analysis; Microchemical analysis; Polarographic analysis; Standard reference materials,

analysis of; TN403.

Storage modulus; Tan 8; Torsion pendulum; Varying crystallinities; Apparatus; Isothermally crystallized sample; Loss compliance; Loss modulus; Mechanical relaxation; Polychlorotrifluoroethylene; Quenched sample; 9441

Straight; Continuum; Crystal: Defect: Dislocation; Energy; In- teraction; Isotropic; 9446.

Strain; Stress; Continuum; Crystal; Defect: Dislocation; Dis- placement; Interaction; Isotropic; 9445.

Strain; Stress; Tensile; Adhesion; Bonding; Dental; Filling materials; Hardening: Shrinkage; 9433.

Strain gage; Life cycling; Life testing: Pressure cycling: Pressure

transducer: TN434.

Stratospheric warnings; Winter anomaly; Absorption, iono- spheric; Ionospheric absorption; 9267.

Stray magnetic field: Transformer; Auxiliary generator; Bridge:

Coaxial choke: Mutual inductor; J. 70C 4-233, 221-226

(1966).

Strength properties: Development: Roofing membrane; BSS9.

Stress; Continuum: Crystal; Defect: Dislocation; Displacement;

Interaction: Isotropic: Strain; 9445.

Stress: Relaxation; BKZ theory; Constant rate of strain; Creep;

Elastic fluid: Nonlinear behavior; Polyisobutylene; Recovery:

J. 70A 6-423, 525-532 (1966).

Stress: Tensile: Adhesion: Bonding; Dental; Filling materials; Hardening; Shrinkage: Strain; 9433.

Stress analysis: Thin wall; Torsion; Tube; Creep: Primary

creep; Shear; Shell; 7. 71C 3-256, 209-225 (1967).

Stress corrosion; Atmospheric corrosion tests: Chemical attack; Cold working: Corrosion; Cracking; Stainless steels; Steels; 9479.

Stress corrosion; Boiling sodium chloride solution; Delayed

failure: High strength steel: Hydrogen diffusion; Hydrogen

embrittlement; Internal initiation; 9478.

Stress relaxation; Thermolytic chain scission; Copolymer;

Ethylene-propylene; Linear polyethylene; 9264.

Stress waves; Wave propagation; Characteristics: Impact;

Linear viscoelasticity; Partial differential equations; J. 70B

4-187, 257-264 (1966).

Strip transmission lines: Characteristic impedance; Inductance:

J. 71C 1-444,59-67 (1967).

Strontium titanate: Bandstructure; Insulator; Magnetic susceptibility; Pauli paramagnetism; Semiconductor; 9453.

Strontium titanate: Superconductivity: Semiconductors; 9397.

Strontium titanate: Vacancies: Young's modulus; Internal fric- tion; Lanthanum titanate: Phase change: Resonance: 9447.

Structural failure; Basic and applied research; Economics of cor- rosion: Industrial design: Materials protection; 9351

Structural load; Apartment dwelling; Burnout test; Fire load; Fire performance; Flame penetration: Potential heat; BSSIO.

Structural steels: Surface hardening: Tempering; Tool steels; Annealing; Case hardening: Chemical composition; Hardening; Heat treatment: Ni-maraging steels: Normalizing: Stainless steels: Mono. 88. Structure; Benitoite: Crystal; X-ray: Barium tetragermanate; J. 70A5-411, 385-391 (1966).

Structure; CF2: Dipole moment: Free radical; Microwave spec- trum: 9380.

Structure; Dinitrogen trioxide; Equilibrium; Microwave spec- trum; 9253.

Structure; Patterson: Vector; Symmetry: Consistency;

Frequency; Superposition: Crystal: J. 70A 4-407, 319-321 (1966).

Structure: X-ray diffraction; Constants; Crystal; Lattice; Measurements; Powder-patterns; Reference-intensities; Standard;

Mono. 25, Section 5. Structures; Substructure searches: Chemical; Computers;

Hayward notation; Information retrieval; Linear notation: 982.

SL](3); SU(6)n: Baryon resonances: Classificafion; Decay

widths: Higher symmetry; 9295.

SU(6)»': Baryon resonances; Classification; Decay widths;

Higher symmetry: SU(3); 9295.

SU(6)ii ; 405 representation; Higher symmetry scneme; X quark

content: Nonet of 2++ mesons; Schwinger mass formula;

9332.

Sub-halides; Boron; Fluorine; NMR; Polysilanes; Silicon; 9229.

Substituted anilines; Substituted phenols; Dissociation constant;

J. 71A 3-453, 213-218 (1967).

Substituted benzoic acids: AUyl- and propenylbenzoic acids; Change of pK with dielectric constant; Hammett sigma constants; Ionization constants; pK values in ethanol-water;

191
Sigma constants in ethanol- water; J. 71 A 5-468, 379-384

(1967).

Substituted phenols; Dissociation constant; Nitrophenols; J. 71A 5-469, 385-389 (1967).

Substituted phenols; Dissociation constant; Methanol-water

mixtures; Solvent effects;^. 10X6-427, 553-556 (1966).

Substituted phenols; Dissociation constant; Substituted anilines;

/. 71A 3-453, 213-218 (1967).

Substitute fluid; Volume flow; Accuracy; Calibration; Commodity transfer; Cryogenic; Cryogenic processes; Density;

Flowmeters; Mass flow; Mass flowmeters; Performance

results; Propellant management; 9428.

Substitutional impurity; U-centers; Alkali halide crystal; Born- Mayer potential; Deformation dipole model; Effective

force constants; Isotopic impurities; Local mode frequencies;

Nearest-neighbor interaction; 9354.

Substitution balance; Volumetric measurement; Water density;

Water weighing; Air density; Balance; Balance calibration; Balance equilibrium; Balance sensitivity; Density; Double

substitution weighing; Hydrostatic balance; J. 71C 3-254,

179-198(1967).

Sub-stoichiometric radioisotopic dilution analysis; Trace

amounts; Cadmium; Dithizone; Silver; 9168.

Substoichiometry by controlled potential coulometry;

Radiochemical separations; Theoretical detection limits for activation analysis; CLSQ program for multicomponent

decay; Solid state detectors; Electronic data handling; NBS

reactor; NBS Linac; TN404.

Substructure searches; Chemical; Computers; Hayward notation; Information retrieval; Linear notation; Structures; 9482. Sucrose; Animal glue; Glucose; Glycerol; Mannitol; Melamine

resin; Paper; 9455.

Sucrose solutions; Hydration; Mixed solutions; Nonelectrolytes; Solvation; 9512.

Sugars in solution; Acid-base catalysis in D2O; Deuterium

isotope effects; D-fructose; D-glucose; Isotope effects; Mechanism of mutarotation; Mutarotation; Pyranose-fu- ranose interconversions; 7. 71 A 2-445, 1 37-148 (1967).

Sugars in solution; Conformational analysis; Carbon-14- and

tritium-labeled carbohydrates; Large-scale paper chromatography; Phenylhydrazono-phenylazo tautomerism; Cyclopentitols and related substances; Unsaturated alditols; Infrared spectra of acylamido derivatives; TN405.

Sulfates; Thermodynamic functions; Decomposition pressures;

NSRDS-NBS7.

Sulfur; Tetramethylthiuram disulfide; Vulcanization; Zinc dibutyldithiocarbamate; Zinc dimethyldithiocarbamate; Accelerators; Far infrared; Natural rubber; J. 71 A 1-432, 19-23

(1967).

Sulfur coatings; Coatings; Infrared integrating sphere coatings;

Integrating spheres; Sphere; 9/57.

Sum; Approximation; Error; Formula; Imprecision; Law of er- ror; Products; Propagation of error; Random; Ratio; Systematic ; y . 70C 4-23 7, 263-2 73(1966).

Sum rules; Characteristic electron energy loss; Far ultraviolet; Germanium; Kronig-Kramers dispersion relations; Optical

properties; 9345.

Sum-rules; Vector current; Axial-vector current; Chiral; G,i;

G*; Representation-mixing; 9353.

Superconducting energy gap; Tunnel junction; GeTe; Semiconductor; 9409.

Superconducting SrTiOs; Critical fields; Heat capacity; Magnetization curves; Semiconducting SrTiOs; 9269.

Superconductivity; Bibliography; Compilation of data; Composition; Critical field; Critical temperature; Crystallographic

data; Low temperature; TN408.

Superconductivity; Ginzburg Landau theory; Indium lead al- loys; 9240.

Superconductivity; Semiconductors; Strontium titanate; 9397.

Superexcited molecule; Butane; Ionization efficiency;

Ion-molecule reactions; Ion-pair yields; Photoionization;

9272.

Superposition; Crystal; Structure; Patterson; Vector; Symmetry; Consistency; Frequency; J. 70A 4-407, 319-321(1966).

Surface; Surface diffusion; Tungsten; Work function; Adsorption; Chemisorption; Desorption; Dissociation; Field emission microscopy; Kinetic; Nitric oxide; 9421.

Surface area; Cation exchange capacity; Cone-plate viscometer;

Crystallinity; Flow properties; Kaolins; 9491.

Surface concentration; Surface self-diffusion; Whisker growth;

Curtis approximation; Dittmar-Neumann approximation;

Mean stay time; Stefan problem; 9508.

Surface coverage; Adsorption kineUcs; Nitrogen; Rhenium;

Sticking coefficient; 9i9'^. Surface diffusion; Tungsten; Work function; Adsorption;

Chemisorption; Desorption; Dissociation; Field emission

microscopy; Kinetic; Nitric oxide; Surface; 9421

Surface effects; Tunnel diodes; Degradation; Gallium arsenide; Lasers; Light emission; 9468.

Surface films; Complex refractive index; Ellipsometry; Mercury; Optical constants; Refractive index; 9509.

Surface free-energy; Chain-folded crystals; Crystal growth;

Kinetics; Multicomponent systems; J. 71A 4-458, 261-275

(1967).

Surface free energy; Chain folding; Crystal growth; Crystallization kinetics; Homogeneous nucleation; Interfacial energy;

Nucleation; Polychlorotrifluoroethylene; Polyethylene;

Polymers; 9454.

Surface hardening; Tempering; Tool steels; Annealing; Case

hardening; Chemical composition; Hardening; Heat treat- ment; Ni-maraging steels; Normalizing; Stainless steels; Structural steels; Mono. 88. Surface layers; CaF2; Conductivity; Crystals; Defect pairs;

Dielectric relaxation; Electrode capacitance; J. 71A 5-465,

355-362 (1967).

Surface reaction; Fluorine; High temperature; Kinetics; Mass

spectrometry; Nickel; 9374.

Surface self-diffusion; Whisker growth; Curtis approximation;

Dittmar-Neumann approximation; Mean stay time; Stefan

problem; Surface concentration; 9508.

Surface structure; Field evaporation; Field ion microscopy; Hep

metals; 9484.

Surround color; Three components color theory; Chromatic in- duction; Color; Contrast; Crispening; Opponent color theory;

9411.

Switching; Dicke; Microwave; Radiometer; Sensitivity; J. 71C

2-252. 127-152(1967).

Sylow subgroups; Bounds; Elementary abelian groups; Generator rank; J. 71B 4-251, 247-248 (1967).

Symbols; Transmittance; Transmittance factor; Absorptance;

Contrast; Modulation; Notation; Optical density;

Propagance; Reflectance; Reflectance factor; 9373.

Symbols; Type faces; Typography; Visibility; Alphanumeric

characters; Displays; Handbook; Human factors; Legibility;

Psychology; Readability; Standards; M262-2.

Symmetrical bending; Symmetrically distributed load; Theory;

Circular plates; Concentric loading; Design; Elasticity; Experiment; Maximum stresses;y. 71C 1-438, 1-10(1967).

Symmetrically distributed load; Theory; Circular plates; Concentric loading; Design; Elasticity; Experiment; Maximum

stresses; Symmetrical bending; 7. 71C 1-438, 1-10(1967).

Symmetric functions; Diophantine equations; Prouhet-Terry-Escott problem; J. 71B 4-241. 181-182 (1967).

Symmetrizable matrix; Generalized inverse; J. 71B 4-248,

229-231 (1967).

Symmetry; Consistency; Frequency; Superposition; Crystal; Structure; Patterson; Vector; 7. 70A 4-407, 319-321(1966).

192
Symmetry breaking; U<12) theory; Baryon; Branching ratio; Decay; Decay width; Meson; Resonances; Spurious; 9166.

Symposium on trace characterization; Trace characterization;

X-ray spectroscopy; Electrochemical methods; Electron and

optical microscopy; Nuclear methods; Optical spectroscopy;

Mono. 100. Synchronization; Time and frequency dissemination; VHP;

VLF; HP; Noise; Satellite; TN357.

Synchrotron light; Grazing-incidence; 3-meter; Monochromator

alignment; 0.06 A resolution; Spectrograph; 9355.

SynthSsis of radioactive sugars; Carbon- 14-labeled L-fucose; L-fuconic acid-7-'^C; L-fucose-/ -''C; Radioactive car- bohydrates;7. 71A 2-444. 133-136(1967).

System; Tungsten trioxide; Crystal structure; Niobium pentoxide; Phase equilibria; J. 70X4-404. 281-303 (1966).

Systematic; Sum; Approximation; Error; Pormula; Imprecision;

Law of error; Products; Propagation of error; Random; Ratio;

J. 70C 4-23 7, 263-2 73(1966).

Systematic error; Sodium nitroprusside; Iron compounds; Optical Mossbauer spectrometer; Tandem Mossbauer spectrometer; Velocity calibration; Mossbauer; Spectroscopy; Standard; Differential chemical shift; Quadrupole splitting; Ran- dom error; M260-13.

Systems analysis; Alphanumeric compression; Information

handling; High-speed information transmission; Information

storage and retrieval; Numeric compression; TN413.

Systems analysis; Conference proceedings; Government;

Operations research; M294.

Systems analysis; State of the art; Benefit-cost analysis; Transportation economics; Transport systems; TN294.

Systems analysis; Transportation planning; Urban transportation; Data processing; 9474.

Systems of differential equations; Numerical integration;

Propagation of error; Stability; J. 71B 2&3-204, 91-103

(1967).

Systems of distinct representatives; Term rank; Algorithms;

Combinatorics; Interdeterminates; Linear algebra; Matroids;

J. 71B4-250, 241-245 (1967).

T

Tables; Activation energies; Arrhenius equation; Bimolecular;

Chemical kinetics; Data; Gas; Rate constants; Reactions;

NSRDS-NBS9.

Tables; Porce; Constants; Spectral; Molecular; Vibrational;

Frequencies; Data; NSRDS-NBS6.

Tabulation; Basing connections; Characteristics; Electron

tubes; Similar types; HI 03. Tabulation; Characteristics tabulation; Electron tubes; Microwave electron tubes; HI 04. Tan 8; Torsion pendulum; Varying crystallinities; Apparatus;

Isothermally crystallized sample; Loss compliance; Loss

modulus; Mechanical relaxation; Polychlorotrifluoroethylene;

Quenched sample; Storage modulus; 9441

Tandem Mossbauer spectrometer; Velocity calibration; Mossbauer; Spectroscopy; Standard; Differential chemical shift; Quadrupole splitting; Random error; Systematic error; Sodium nitroprusside; Iron compounds; Optical Mossbauer spec- trometer; M260-1 3. Tanks; Valves; Bowls; Brass; Dimensions; Nuts; Plastic; Plimbing equipment; PS6-66.

Technetium, spectra of; Wavelengths of technetium; Spectra of

technetium;^. 71A 6-47/, 547-565 (1967).

Technical highlights; Annual report; M283.

Technical highlights; Annual report; M293.

Technical personnel; Environment; Personnel; Professional en- vironment; Professional personnel; Scientists and engineers;

Standing committee; 9271.

Techniques of vacuum measurement; Vacuum index; Vacuum

measurement; Bibliography; Low pressure measurement;

Mono. 35, Supplement 1. Technology; World trade; Developing countries; International standards; Role of government; Role of private enterprise;

M284.

Teeth; Bonding; Coupling agent; Denture; Plastic; Porcelain ad- hesion; Resin; Silane; 9494.

Teflon; Aluminum diboride; a-aluminum dodecaboride; Aluminum fluoride; Bomb calorimeter; Boron trifluoride; Fluorine; Heat of combustion; Heat of formation; J. 71A

4-462. 307-315 (1967).

Teflon; Aluminum fluoride; Carbon tetrafluoride; Fluorine;

Fluorine bomb calorimetry; Graphite; Heat of combustion;

Heat of formation; Hydrogen fluoride aqueous; J. 71A 2-440,

105-118(1967).

Teflon; Bomb calorimeter; Boron; Boron trifluoride; Fluorine;

Heatofformation;y.71Ai-45/. 195-202 (1967).

Telecommunication; United States; Atmospheric research; Electromagnetic; 9158.

Telemetry, novel form of; Device, electroexplosive ordnance;

Field, near-zone electromagnetic; Hazards, electromagnetic

radiation; Line, nonmetallic electrical transmission; Line,

semiconducting plastic transmission; J. 71C 1-443. 51-57

(1967).

Telemetry, novel form of; Device, electro-explosive ordnance;

Field, near-zone electromagnetic; Hazards, electromagnetic

radiation; Line, non-metallic electrical transmission; Line,

semi-conducting plastic transmission; Meter, electric field-strength; TN345.

Telemetry; Device; Field; Hazards; Line; Meter; 9318.

Tellurium; Chemical separation; Distillation; Neutron-activation; 9169.

Tellurium; Ultrasonics; Compressibility; Cylinder distortion; High pressure; Nickel; J. 71C 1-439, 11-17(1967).

Temperature; Arc; Blackbody; Graphite; Spectral radiance;

Spectroradiometer; 9326.

Temperature; Blackbody; International Practical Temperature

Scale; Optical; Photoelectric pyrometer; Radiance sources; Standards; 9347.

Temperature; Graphite arc; Pyrometry; Standard; 9346.

Temperature; Infrared pyrometer; International Practical Temperature Scale; Optical pyrometer; Radiation thermometry;

Standards; 9343.

Temperature; Temperature gradient; Transducers; Flush

diaphragm; Pressure gage; 9258.

Temperature; Thermometry; Thermocouples; Thermistors; Resistance thermometer; Radiation pyrometry; Mono. 27,

Supplement 2. Temperature; Total energy; Bulk viscosity; Macroscopic equations of motion; Macroscopic variable; Non-equilibrium

kinetic energy; 9313.

Temperature coefficient; Collagen; End-to-end bonding;

Hydrophobic bonding; Lateral aggregation; Native aggregation; 9436.

Temperature compensation; Ultrasonics; Velocity of sound;

Delay line; Frequency stability; Gage; High pressure;

Self-excited pulse repetition; 9331

Temperature dependence; Annealed specimens; Cold-worked

specimens; Elastic moduli; Internal friction; Nickel-titanium

alloy; 9511.

Temperature dependence; Viscosity of parahydrogen; Liquid

normal hydrogen; Parahydrogen; Shear viscosity; 9201

Temperature gradient; Transducers; Plush diaphragm; Pressure

gage; Temperature; 9258.

Temperature gradient zone melting; Traveling solvent; Calcium

molybdate; Crystal growth; Lithium sulfate; Single crystals;

9496.

193
Temperature measurement; Temperature pattern: Diameter

ratio; Mixing effectiveness; Square-edged orifice; BSS12.

Temperature pattern; Diameter ratio; Mixing effectiveness;

Square-edged orifice; Temperature measurement; BSS12.

Temperatures; Triple-point region; T-S diagram; Enthalpy; Entropy; Parahydrogen; Pressure-volume; Properties; TN343.

Tempering; Tool steels; Annealing; Case hardening; Chemical

composition; Hardening; Heat treatment; Ni-maraging steels; Normalizing; Stainless steels; Structural steels; Surface

hardening; Mono. 88. Tendon; Bone; Collagen; Hydroxyapatite; Piezoelectricity;

Pyroelectricity; 9470.

Tensile; Adhesion; Bonding; Dental; Filling materials; Hardening; Shrinkage; Strain; Stress; 9433.

Tensor permeability; Degenerate mode cavity; L-band cavity;

Polycrystalline garnets;y. 71C 1-445, 69-75 (1967).

Tensor permeability; YIG; External tensor permeability; Fer- rimagnetic resonance; Ferrites; Garnet; Low magnetic field effects; Permeability; Spin waves; 9395.

Tentative assignment based on selection rules; Bi-nuclear complex; Copper (II) acetate monohydrate; Polarized electronic

absorption spectrum; 9155.

Term rank; Algorithms; Combinatorics; Indeterminates; Linear

algebra; Matroids; Systems of distinct representatives; 7. 71B

4-250, 241-245(1967).

Term values; Wavefunctions; Multiplet strength; Self-consistent

field; 7. 71A 2-447, 1 57-1 62 ( 1 967).

Testing; Basic and applied research; Calibration; Instrumentation; Interchangeability of parts; Mass production; Standardization; 9350.

Testing of information systems; Effectiveness; Evaluation; Per- formance; Relevance; TN297.

Testing of lenses; Interferometer; Lens aberrations; Prism inter- ferometer; 9231. Test method; Dynamic calibration and telemetering;

Electro-mechanical; Pressure; Transducer; Calibration; Per- formance; TN41 1

Test methods; Certification and labeling plans; Government

standardization, U.S.; Specifications; Standardization activities, U. S.; Standards; M288.

Tetrachlorocuprate ion; Copper doped tetrachlorozincate; E.p.r. analysis; Jahn-Teller effect; Polarized ultraviolet spec- trum; 9191.

Tetrahedral; Crystal structure; Dichloro( 1 .10-phenanthroline)-

zinc; Molecular structure; 9499.

Tetrahydrofuran; Hydroxyl radicals; Electron spin resonance; Free radicals; Polyvinyl alcohol; Polyethylene oxide; 9175.

Tetramethylthiuram disulfide; Vulcanization; Zinc dibutyldithiocarbamate; Zinc dimethyldithiocarbamate; Accelerators; Far infrared; Natural rubber; Sulfur;^. 71A 1-432, 19-23

(1967).

Textiles; Fading standardization; Light-sensitive paper;

Booklets of faded strips; Fading characterisfics; M260-1 5. TFE-fluorocarbon; Coatings, dry film; Dry film lubricafion; Polytetrafluoroethylene; Resin sintered coatings; CS274-66.

TFE-fluorocarbon; Electrical tape, plastic; Plasfic tape;

Polytetrafluoroethylene; Resin skived tape; Skived tape;

PS3-66.

Thallium; Atomic beam; Frequency shift; Radiation field; Resonance; TN346.

Theoretical; Third spectra; Configurations 4d'^4d"-^ 5s. energy

levels; Interacfion parameters; Palladium group; J. 70A 5-475,

435-445 (1966).

Theoretical; Unimolecular dissociation; Activated complex; Activated molecules; Activated state; Decay; Dissociation; High

pressure rate constant; Kinetics; Lifetime; Mass spectra;

Metastable molecules; Predissociation; Quantum mechanics;

9366.

Theoretical detection limits for activation analysis; CLSQ pro- gram for multicomponent decay; Solid state detectors; Electronic data handling; NBS reactor; NBS Linac; Cockroft-Walton generator; Digital computers; Activation analysis;

TN404.

Theoretical physics; Nuclear physics; Photonuclear absorption

cross sections; Spherical nuclei; 9214.

Theories of color; Chromatic adaptation; Color; Colorblindness;

Colorimetry; 9162.

Theory; Circular plates; Concentric loading; Design; Elasticity;

Experiment; Maximum stresses; Symmetrical bending; Symmetrically distributed load;y. 71C 1-438, 1-10(1967).

Theory; Diffusion coefficient; Polymer; Solution; 9425.

Theory; Transport properties; Correlation; Equilibrium properties; Experimental data; Intermolecular potential function;

TN360.

Theory; Vacancies; Vibrational states; Calculations; Electronic

states, energies of formation; Energies of motion; Interstitials; Point defects; A/257.

Theory; Vacuum-ultraviolet; Atomic; Collisions; Continuous;

Deexcitation; He; He2; Metastable; Radiative; Spectra; 9367.

Thermal breakdown; Transistors; Bibliography; Device reliabili- ty; Diodes; Failure mechanisms; Failure modes; Second

breakdown; Semiconductor devices; TN431

Thermal building design; Thermal insulation; Thermal per- formance standards; Indoor thermal environment; Insulated

construction; Insulation research; 9498.

Thermal conductivity; Armco iron; Conductivity; Electrical conductivity; Electrical resistivity; Heat conductivity; Heat

transfer; Iron; Lorenz function; Resistivity; J. 71C 4-259,

285-291 (1967).

Thermal conductivity; Conductivity; Electrical conductivity;

Electrical resistivity; Heat conductivity; Lorenz function;

Platinum; Reference material; Resistivity; Standard; J 71C

4-258,255-284 (1967).

Thermal conductivity; Gases; Liquids; Metals; Solids; NSRDS-NBS8.

Thermal conductivity; Heat conduction; Heat generation; Heat

transfer; Neutron absorption; Radioactive decay; J. 71C

4-260,293-298(1967).

Thermal conductivity; Transport coefficients; Triple collisions; Viscosity; Dense gases; Rigid disks; Rigid spheres; 9399.

Thermal conductivity; Transport properties; Triple collisions; Viscosity; Dense gases; Rigid spheres; 9400.

Thermal convection; Crystal growth; Fused salts; Magnetic

fields; Molten metals; Solute distribution; 9513.

Thermal cycling at low temperature; Thermometry; Germanium

resistors; Germanium resistor reproducibility; Low temperature thermometry; Reproducibility of germanium resistors;/.

70C 4-235,245-254 (1966).

Thermal decomposition; Thermogravimetry; Thermolysis; Stability of polymers; Degradation; Nonisothermal kinetics; Polymers; Pyrolysis; J. 70A 6-422, 487-523 (1966).

Thermal decomposition; Thermal volatilization;

1 ,2-dihydronaphthalene; Degradation; Polymerization; Pyrolysis; 9218.

Thermal diffusivity of earth; Earth temperature; Least squares

technique; y. 71C 1-442, 43-50 (1967).

Thermal expansion; Anisotropic crystal; Gruneisen's constant; Interferometer; Rutile;/. 71A 5-466, 363-369 (1967).

Thermal expansion; Controlled-gradient vacuum furnace; Elevated temperatures; Optical comparator; J. 71C 2-247,

85-91 (1967).

Thermal expansion; Ferromagnetism; Hyperfine field; NMR;

Nuclear interaction; Nuclear quadrupole resonance; 9219.

Thermal insulation; Thermal performance standards; Indoor

thermal environment; Insulated construction; Insulation research; Thermal building design; 9498.

Thermally tempered glass; Fracture mirror size; Modulus rupture; 9227.

194
Thermal neutron flux; Absolute gamma ray source strength;

Black glass beads; 9435.

Thermal performance standards; Indoor thermal environment;

Insulated construction; Insulation research; Thermal building

design; Thermal insulation; 9498.

Thermal radiation; Computational methods; Emissivity;

Emittance measurements; Radiant heat transfer; Reflectance

measurements; 9303.

Thermal radiation; Thoria; Zirconia; Alumina; Ceramic oxides;

Emittance; Error sources; Magnesia; Measurement uncertainties ; Spectral emittance ; J. 70A 5-4 12,3 93-4 15 (1966).

Thermal radiation; Total emittance; Emissivity; Emittance;

High temperature reflectance; Infrared reflectance; Radiation

properties; Reflectance; Spectral emittance; Spectral

reflectance; TN292.

Thermal radiation; V-grooves; Reflectance; Specular walls; J. 70C 4-238,275-280(1966).

Thermal shock; Built-up roof membrane; Innovation; Preventive measures; Splitting failures; 9207.

Thermal-shock resistance factor; Development; Roofing

membrane; Strength properties; Thermally-induced forces; BSS9.

Thermal stress; Yield stress; Elastic stress; Heat transfer; Plane

strain; J. 70B 4-188, 265-272 (1966).

Thermal structure; Atmospheric resonances; Auroral mfrasound; Infrasonic waves; 9186.

Thermal volatilization; 1 ,2-dihydronaphthalene; Degradation;

Polymerization; Pyrolysis; Thermal decomposition; 9218.

Thermal voltage converter; Inductive voltage divider; Measurement; Phase-angle; Standard; Audiofrequency; TN347.

Thermally-induced forces; Thermal-shock resistance factor; Development; Roofing membrane; Strength properties;

BSS9.

Thermistors; Resistance thermometer; Radiation pyrometry;

Temperature; Thermometry; Thermocouples; Mono. 27,

Supplement 2. Thermoanalytical standards; Tricalcium silicate; Spectrophotometry; Antimony; High precision determination of

nickel; Simultaneous determination copper; Cobalt; "releasing

agents" in flame emission and atomic absorption; Magnesium;

Ferrous SRMs;rN402.

Thermistors; Resistance thermometer; Radiation pyrometry;

Temperature; Thermometry; Thermocouples; Mono. 27,

Supplement 2. Thermodynamic; Vaporization; Enthalpy; Heavier elements;

Literature survey; Refractory compounds; 9153.

Thermodynamic and transport properties; Cryogenic data

center; Cryogenic fluids; Low temperature properties of

materials; NBS cryogenic data center; 9255.

Thermodynamic function; Density; Heat of vaporization;

Hydrogen; Parahydrogen; Specific heat; 9246.

Thermodynamic functions; Decomposition pressures; Sulfates; NSRDS-NBS7.

Thermodynamic properties; Cryogenics; Dilution refrigerator;

Enthalpy; Entropy; Fermi-Dirac gas; Helium-3; Helium-4;

Liquid; Mixtures; Osmotic pressure; Quantum fluid; Specific

heat; TN362.

Thermodynamic properties; Annealed glass; Crystal; Diethyl

phthalate; Glass transformation; Heat capacity calorimetry;

Molecular configurational state; Normal and supercooled

liquid; Quenched glass; J. 71A 4-461, 293-305 (1967).

Thermodynamic properties; Convergence temperature; Melting

temperatures; Methyl surfaces; ^-paraffins; Polyethylene; J. 70X6-421,481-486(1966).

Thermodynamic properties; Beryllium 1 ;3-aluminate; Enthalpy;

Entropy; Gibbs energy; Heat capacity; Low temperature

calorimetry; J. 71A 1-429, 3-8 (1967).

Thermodynamic properties; Beryllium aluminate; Chrysoberyl,

drop calorimetry; Enthalpy measurements; High-temperature

calorimetry; Mixed oxides; Specific heat; J. 71A 2-438, 89-95

(1967).

Thermodynamic properties; Beryllium aluminate (1:3); Drop

calorimetry; Enthalpy measurements; High-temperature

calorimetry; Mixed oxides; Specific heat; J. 71 A 2-439,

97-103 (1967).

Thermodynamic properties; Aluminum trifluoride; Drop

calorimetry, enthalpy measurements; High-temperature

calorimetry; Phase transition; Pretransition phenomena;

Specific heat;y. 71A 3-450, 185-193 (1967).

Thermodynamic properties; Equation of state; Hydrogen;

Parahydrogen; PKT-relations; 7. 71A 3-452, 203-218 (1967).

Thermodynamic properties; Thermodynamics, rigid-rotor;

Rigid-rotor, high temperatures; 9263.

Thermodynamic properties; Visible-ultraviolet spectrum; F

atom reactions; Force constants; HNF; HNF2; Infrared spec- trum; Matrix isolation; NF; NF-.; 9335.

Thermodynamic properties; Ultraviolet photolysis; Carbon

atom production; Carbon atom reactions; Cyanogen azide;

Force constants; Infrared spectrum; NCN free radical; 9369.

Thermodynamic properties; Elastic constants; Lattice dynamics; Lattice parameter changes; Single crystal ice; Speed of

sound; 9383.

Thermodynamic properties; Three-parameter theorem; Argon;

Molecular complexity; Molecular thermodynamics;

Prigogine's cell theory; 9386.

Thermodynamic quantities; Bases; Dissociation constant; Emf

measurements; Morpholine; Morpholinium ion; 9460.

Thermodynamics, rigid-rotor; Rigid-rotor, high temperatures;

Thermodynamic properties; 9263.

Thermodynamics; Acid-base equilibria; Aminopyridine; Dissociation constant; Electrolytic dissociation; Methanol-water

solvents; 9493.

Thermodynamics; Acidity; Analytical chemistry; Conductance;

Deuterium oxide; Dissociation processes; Electrochemistry;

Electrolytes; Emf; Indicators; Isopiestic; Vapor pressure;

Methanol-water solvents; TN400.

Thermodynamics; Beryllium oxide; Calorimetry; Chemical

propulsion; Equilibrium; Estimates; 9301.

Thermodynamics; Dissociation; Electrolytes; Methanol;

w-nitrophenol; Nonaqueous solvents; Phenols; J. 71A 1-430,

9-12(1967).

Thermodynamics; Weak electrolytes; Acetic acid-J4; Acid-base;

Deuterium oxide; Dissociation constants; Emf; Ionization;

Isotope effects; 9492.

Thermoelectric; Connector; Electromotive force; Oil baths; Standard cells; TN353.

Thermogravimetric analysis; Variation of the activation energy;

Calculation of kinetic parameters; Determination of activation

energies; Preexponential factor; Stability of polymers; 9192.

Thermogravimetry; Energy of activation; Initial kinetic parameters; Non-isothermal kinetics; Polyethylene; Polymer

degradation; Stability of polymers; 9451

Thermogravimetry; Thermolysis; Stability of polymers;

Degradation; Nonisothermal kinetics; Polymers; Pyrolysis;

Thermal decomposition; 7. 70A 6-422, 487-523 (1966).

Thermolysis; Stability of polymers; Degradation; Nonisothermal kinetics; Polymers; Pyrolysis; Thermal decomposition;

Thermogravimetry; y. 70A6-422, 487-523 (1966).

Thermolytic chain scission; Copolymer; Ethylene-propylene;

Linear polyethylene; Stress relaxation; 9264.

Thermometry; Calibration of germanium resistors; Germanium

resistors;y. 71C 1-441, 29-41 (1967).

Thermometry; Germanium resistors; Germanium resistor reproducibility; Low temperature thermometry; Reproducibility of germanium resistors; Thermal cycling at low temperature; 7. 70C 4-235, 245-254 (1966).

Thermometry; Thermocouples; Thermistors; Resistance ther- mometer; Radiation pyrometry; Temperature; Mono. 27,

Supplement 2.

195
Thermostat: Ultraviolet-visible; -150 to +60 °C; Spectrophotometry: 9316.

Thickness: Tolerances; Blackboards: Dimensions: Natural

markings: Slabs: Slate: Standard sizes: PS2-66.

Thin films: Vacuum; Adsoi-ption: Barium fluoride; Electric hygrometer: Humidity; J. 71C 3-255, 199-207 (1967).

Thin plates; Bassali's theory: Concentric loading; Circular

plates: Deflection; Elasticity; Experimental: Flexure: Point

supports: Simplified approximate solutions: J. 70C 4-234,

227-244(1966).

Thin wall; Torsion; Tube; Creep: Primary creep; Shear; Shell; Stress analysis; y.71Ci-256, 209-225 (1967).

Third law heat: Vapor pressure: Bias of least squares estimators;

Coefficient of variation: Correlated estimators; Enthalpy ad- justments; Heat of vaporization; High temperature chemistry;

Overestimation of standard deviation; J. 70A 6-424, 533-539,

(1966).

Third spectra: Configurations 4d^4d"-' 5s, energy levels; In- teraction parameters; Palladium group; Theoretical; J. 70

5-415.435-445 (1966).

Third spectrum: Corrections to analysis of Au iii; Gold; Spectrum of Au III ; y. 70A 6-418, 465-466 (1966).

Thoria; Zirconia; Alumina; Ceramic oxides: Emittance; Error

sources; Magnesia; Measurement uncertainties: Spectral

emittance; Thermal radiation: J. 70A 5-412, 393-415 (1966).

Three-circle: X ray; Diffraction; Diffractometer; Neutrons;

Simultaneous; 9524.

Three components color theory; Chromatic induction; Color;

Contrast; Crispening; Opponent color theory: Surround color; 9411.

Three-parameter theorem; Argon: Molecular complexity;

Molecular thermodynamics: Prigogine's cell theory; Thermodynamic properties: 9386.

Three-terminal electrode set; Clausius-Mossotti: Density;

Dielectric constant; Dilatometer; Function; High pressure;

«-hexane; Pressure;/. 71A 4-460, 287-292 (1967).

Threshold; Acoustic cavitation: Alpha-particle-induced cavitation: Cavitation: Cavitation nucleus: Cavitation threshold; Fission-induced cavitation: Neutron-induced cavitation; Radiation-induced cavitation; J. 71C 4-261, 299-312 (1967).

Threshold; Ultraviolet; Vacuum; Dissociation; Fragment ions; Ionization; Mass spectrometer; Molecule: NO2; NO2* N2O+;

Photoionization;/. 71A 5-467, 371-378 (1967).

Threshold energies: Autoionization; 1,2-dideuteroethylene;

Ethylene; Mass spectra: Photoionization; Rydberg; 9281.

Time; Reference specimens; Dieiectnc constant; Dissipation

factor; Frequency: Fluorinated ethylene-propylene; Humidity; Polycarbonate; Polyethylene: Poly(l,4-cyclohexylenedimethylene terephthalate); Polystyrene: J. 71C 2-251,

119-125 (1967).

Time and frequency dissemination; VHF; VLF; HF; Noise;

Satellite; Synchronization; TN357.

Time intervals; Noise, signal: Photomultipliers; Signal noise

ratio; Statistical properties: 9232.

Time-resolved spectroscopy: Titanium: TiO; Aluminum; AlH;

AlO; Atomic spectra: Electrical discharges; Exploding wires;

Light sources; 9292.

Time-shared computer; X-ray spectroscopy; Analysis; Arc temperature; Atomic absorption spectrometry; Analog computer;

Bibliography; Computer; Electrodeposition: Electron back

scatter; Electron probe microanalyzer; Emission spectroscopy: Laser probe: TN401.

Time signals: Very low frequency; Broadcast of standard

frequencies: High frequency: Low frequency; Standard

fi-equencies; M236, 1967 Edition.

Time signals: Very low frequency: Broadcast of standard

frequencies; High frequency: Low frequency: Standard

frequencies: 9237.

Tin standard for chemical shift; PARLORS program for Mossbauer spectra; Mossbauer instrumentation; Mossbauer laboratories: Radiometric trace chromatography; Radioisotope dilu- tion; Substoichiometry by controlled potential coulometry;

Radiochemical separations; TN404.

Tin standard for chemical shift; Computers; Cross sections: Detection limits for analysis; Flux monitors; Mossbauer instru- mentation: Mossbauer spectroscopy: NBS Linac; Nickel-61;

PARLORS program for Mossbauer spectra; Photoneutron

reaction: TN421.

TiO; Aluminum; AlH; AlO: Atomic spectra; Electrical discharges: Exploding wires: Light sources; Time-resolved

spectroscopy; Titanium: 9292.

Ti02-Ir02 system: Dissociation; Phase relations: Sn02-Ir02

system; Solid solution:/. 71A 2-441, 119-123 (1967).

Titanium; TiO; Aluminum; AlH; AlO; Atomic spectra; Electrical discharges; Exploding wires; Light sources; Time-resolved

spectroscopy; 9292.

Tolerances: Blackboards; Dimensions: Natural markings; Slabs;

Slate; Standard sizes; Thickness: PS2-66.

Tool steels; Annealing; Case hardening; Chemical composition;

Hardening: Heat treatment; Ni-maraging steels; Normalizing;

Stainless steels; Structural steels; Surface hardening: Tempering; Mono. 88. Topography; Brittle polymers; Fracture topography; Kinetics;

Polymeric solids: Primarv fracture front: 9487.

Topology; Contractions; Functional analysis; Metric spaces; 7. 71B 2&3-202, 73-76(1967^

Topology; 3-manifold; 3-sphere: Free group; Handlebody;

Homeomorphism: Simply connected; J. 71B 2&3-197, 53-56

(1967\.

Torsion; Tube; Creep: Primary creep; Shear; Shell; Stress analysis: Thin wall:/. 71C 3-256, 209-225(1967).

Torsion pendulum: Varying crystallinities; Apparatus; Isother- mally crystallized sample: Loss compliance; Loss modulus;

Mechanical relaxation; Polychlorotrifluoroethylene;

Quenched sample: Storage modulus; Tan 6; 9441

Total emittance; Emissivity; Emittance: High temperature

reflectance: Infrared reflectance: Radiation properties;

Reflectance: Spectral emittance; Spectral reflectance; Thermal radiation; TN292.

Total energy: Bulk viscosity; Macroscopic equations of motion;

Macroscopic variable; Non-equilibrium kinetic energy; Temperature; 9313.

Total irradiance; Blackbody; Lamp standard; 9406.

Tournaments; Weighing designs: Calibration: Calibration

designs; Combinatorial analysis; Difference sets; Incomplete

block designs; Statistical experiment designs; J. 71B 4-237,

149-160(1967).

Traceability: United States measurement system: Accuracy;

Calibrations; Conferences. 1966 Standards Laboratory:

Foreign standards laboratories; Laboratory management;

Measurements and standards; Measurement system; M291

Trace amounts; Cadmium; Dithizone; Silver; Sub-stoichiometric radioisotopic dilution analysis: 9168.

Trace characterization; X-ray spectroscopy; Electrochemical

methods: Electron and optical microscopy; Nuclear methods;

Optical spectroscopy: Symposium on trace characterization;

Mono. 100. Trackmg: Atmospheric: Distance measurements;

Earth-to-space microwave transmissions; Microwave trans- missions: Phase; TN339.

Tracking: Measurements; Electrical testing; Conductance;

Dielectric conductance; Conductivity: Volume conductivity;

Insulation conductance; Resistance; Dielectric resistance;

Resistivity; Dielectric constant; Permittivity; Dissipation factor: Loss index; 9174.

196
Transducer; Calibration; Performance; Test method; Dynamic

calibration and telemetering; Electro-mechanical; Pressure; TN411.

Transducers; Flush diaphragm; Pressure gage; Temperature;

Temperature gradient; 9258.

Transformer; Auxiliary generator; Bridge; Coaxial choke; Mutual inductor; Stray magnetic field; J. 70C 4-233, 221-226

(1966).

Transformer; Voltage-divider; Voltmeter; Alternating-current;

Calibration; Direct-current; High-voltage; Ratio; Safety;

Standards enclosure; TN349.

Transistors; Bibliography; Device reliability; Diodes; Failure

mechanisms; Failure modes; Second breakdown; Semiconductor devices; Thermal breakdown; TN431.

Transistors; Modulators; Radio communications; Radio

receivers; TNIOO-A, Supplement to Appendix C ofTNlOO.

Transition; Ultrasonically; Hexadecapole; Induced; Nuclear;

9356.

Transition elements; Alloy phases; Atomic ordering; A15-type

phases; Chromium alloys; Electron compounds; Intermediate

phases; Nonstoichiometric phases; Osmium alloys; Platinum

alloys; 9517.

Transition probabilities; Argon; Atomic spectra; J. 71A 6-473,

575-583(1967).

Transition probabilities; Atomic spectra; Multiplet tables; Rare-earth spectra; Spectra, far ultraviolet; 9210.

Transition probabilities; Exponential relaxation; Master equation; Moments; Probability distributions; Relaxation; 9527.

Transition probability; Ultraviolet lines of Fe i; Atomic spectra;

Iron; Oscillator strengths; J. 70A 4-409, 325-371 (1966).

Translation system; Linguistic work; Mechanical translation system; Morphological classification; 9205.

Transmission of x rays; X-ray diffraction; Divergent x-ray beams; Kossel; Kossel sample preparation; Photographic contrast; 9521.

Transmittance; Transmittance factor; Absorptance; Contrast; Modulation; Notation; Optical density; Propagance;

Reflectance; Reflectance factor; Symbols; 9373.

Transmittance factor; Absorptance; Contrast; Modulation;

Notation; Optical density; Propagance; Reflectance;

Reflectance factor; Symbols; Transmittance; 9373.

Transmitting loop antenna; Loop-antenna field strength; Magnetic field-strength standard; Mutual inductance of coaxial cir- cular filaments; Near-zone magnetic field; J. 71C 4-263,

319-326(1967).

Transportation economics; Transport systems; Systems analysis; State of the art; Benefit-cost analysis; TN294.

Transportation planning; Urban transportation; Data

processing; Systems analysis; 9474.

Transport coefficients; Correlations; M-6; Kihara; Exp: 6, Morse; Potential functions; Dilute gases; Neon; Krypton;

Xenon; TN352.

Transport coefficients; Lennard-Jones; Kihara; Exp: 6; Morse

potential functions; Eucken correction; Correlation; Dilute

gases; Nitrogen; Oxygen; TN350.

Transport coefficients; Triple collisions; Viscosity; Dense

gases; Rigid disks; Rigid spheres; Thermal conductivity;

9399.

Transport properties; Correlation; Equilibrium properties; Experimental data; Intermolecular potential function: Theory;

TN360.

Transport properties; Triple collisions; Viscosity; Dense gases; Rigid spheres; Thermal conductivity; 9400.

Transport properties; Virial coefficients; Atoms; Compressibility; Heat of sublimation; Molecules; Potential functions; Empirical and semi-emoirical; TN246.

Transport systems; Systems analysis; State of the art; Benefit-cost analysis; Transportation economics; TN294.

Transresistance; URS (universal ratio set); VERI (versatile

ratio instrument); DRRS (direct reading ratio set); Junction;

Precision measurements; Ratio; Resistor; Four-terminal; Resistance decade; y. 70C 3-228, 169-1 72 (1966). Transrotor engine; Platinum resistance; Dynamic analog cor- relation system; Combination metering and safety valve; High

temperatures; TN295.

Trapezoidal; Triangular; Dispersion; Distributions; Folding;

Gaussian; Square; 9398.

Trapping; Energy, required to create an electron-hole pair; Low

temperature; Recombination; Shockley theory of e; Silicon radiation detectors; 9299.

Traveling salesman; Trees; Algorithms; Arborescences;

Branchings; Combinatorics; Graphs; Linear programming; J. 71B 4-249, 233-240(1967).

Traveling solvent; Calcium molybdate; Crystal growth: Lithium

sulfate; Single crystals; Temperature gradient zone melting;

9496.

Trees; Algorithms; Arborescences; Branchings; Combinatorics;

Graphs; Linear programming; Traveling salesman; J. 71B

4-249, 233-240(1967).

Triangular; Dispersion; Distributions; Folding; Gaussian;

Square; Trapezoidal; 9398.

Tricalcium silicate; Spectrophotometry; Antimony; High precision determination of nickel; Simultaneous determination

copper; Cobalt; "releasing agents" in flame emission and

atomic absorption; Magnesium; Ferrous SRMs; Stoichiometric mixtures uranium oxide; TN402.

Tripartite nomogram; Nomogram; 9364.

Triple collisions; Viscosity; Dense gases; Rigid disks; Rigid

spheres; Thermal conductivity; Transport coefficients; 9399.

Triple collisions; Viscosity; Dense gases; Rigid spheres; Thermal conductivity; Transport properties; 9400.

Triple diagonal matrices; Chains; Cycles; Jacobi matrices;

J. 71B 4-246. 215-224 (1967).

Triple-point region; T-S diagram; Enthalpy; Entropy;

Parahydrogen; Pressure-volume; Properties; Temperatures;

TN343.

Triplet state; Vapor phase; Aldehyde; Energy transfer; Photolysis; 9385.

Triplet states; Crystals; Phosphorescence; 9178.

Trisphenanthroline cobalt(ii) nitrate dihydrate;

Trisphenanthrolinezinc nitrate dihydrate; Electron absorption

spectrum ;y.70A 5-413,417-419(1966).

Trisphenanthrolinezinc nitrate dihydrate; Electron absorption

spectrum; Trisphenanthroline cobalt(ii) nitrate dihydrate; J. 70X5-413,417-419(1966).

T-S diagram; Enthalpy; Entropy; Parahydrogen;

Pressure-volume; Properties; Temperatures; Triple-point re- gion; TN343.

T-tube; Carbon ii; Coulomb approximation; Electron density;

Electron temperature; Equivalent electrons: Local thermal

equilibrium; Oscillator strength (f-value); Optical depth; Oxygen II ; Plasma; 9388.

Tube; Creep; Primary creep; Shear; Shell; Stress analysis; Thin

wall; Torsion; y. 71C 3-256, 209-225 (1967).

Tufted carpet mill; Industrial dynamics; Simulation; 9523.

Tungsten; Electron affinity; Positive and negative self-surface ionization; 9393.

Tungsten; Work function; (110) plane; Energy distribution; Field emission; Patch fields; 9424.

Tungsten; Work function; Adsorption; Chemisorption; Desorption; Dissociation; Field emission microscopy; Kinetic; Nitric

oxide; Surface; Surface diffusion; 9421.

Tungsten trioxide; Crystal structure; Niobium pentoxide; Phase

equilibria; System; 7. 70X4-404, 281-303 (1966).

Tunnel diodes; Degradation; Gallium arsenide; Lasers; Light

emission; Surface effects; 9468.

197
Tunnel junction; GeTe; Semiconductor; Superconducting ener- gy gap; 9409.

Tutorial; Microwave; Attenuation; Measurements; Standards;

Mono. 97. Two-dimensional languages; Chinese characters; Grammar;

Generative grammar; Component combination; Phrase struc- ture grammar; Linguistics; Frame embedding; TN296.

Two-photon ionization; Atomic calculations; Nonlinear optical

phenomenon; 9323.

Two-relaxation time model; Volume relaxation; Annealing;

Borosilicate crown glass; Glass; Index of refraction; Relaxation times; y. 71A 3-456, 231-238 (1967).

Type faces; Typography; Visibility; Alphanumeric characters; Displays; Handbook; Human factors; Legibility; Psychology;

Readability; Standards; Symbols; M262-2.

Typography; Visibility; Alphanumeric characters; Displays;

Handbook; Human factors; Legibility; Psychology; Readability; Standards; Symbols; Type faces; M262-2.

Ti; Analyzer; Cryogenics; Hydrogen; Instrument; Instrumentation; Liquefier; Liquid hydrogen; Measurement; Nuclear spin

relaxation time; Ortho-para; Relaxation time; 9486.

u

U. S. Customary System; Weights and measures; Weights and measures abbreviations; Weights and measures systems;

Weights and measures units; Conversion tables; International

System (SI); Metric System; M286.

U(I2) theory; Baryon; Branching ratio; Decay; Decay width;

Meson; Resonances; Spurious; Symmetry breaking; 9166.

U-centers; Alkali halide crystal; Born-Mayer potential; Deformation dipole model; Effective force constants; Isotopic impurities; Local mode frequencies; Nearest-neighbor interaction; Substitutional impurity; 9354.

Ultrasonically; Hexadecapole; Induced; Nuclear; Transition;

9356.

Ultrasonic interferometer; Acoustical thermometry; Isotherms

below 20 °K; Low temperature thermometry; Primary ther- mometry; Speed of sound; 9379.

Ultrasonics; Boxcar integrator; Nuclear magnetic resonance; Phonon nuclear interaction; TN344.

Ultrasonics; Compressibility; Cylinder distortion; High pres- sure; Nickel; Tellurium;^. 71C 1-439, 11-17(1967).

Ultrasonics; Electrical connector; Feedthrough; High pressure;

Resistance gage; 9526.

Ultrasonics; Velocity of sound; Delay line; Frequency stability;

Gage; High pressure: Self-excited pulse repetition; Temperature compensation; 9331.

Ultraviolet; Atomic spectra; Intensities; Spectral lines; Mono.

32, Supplement.

Ultraviolet; Diatomic molecule; Interference; Photoionization;

9293.

Ultraviolet; Vacuum; Dissociation; Fragment ions; Ionization;

Mass spectrometer; Molecule; NO2; NO2+ N2O+;

Photoionization; Threshold; 7. 71 A 5-467, 371-378(1967).

Ultraviolet; Vacuum; Wavelengths; Carbon; Copper; Germani- um; Ritz; Silicon; Spectrum; Standards; 9338.

Ultraviolet; X-rays; Absorption; Radiation; Spectroscopy;

9311.

Ultraviolet absorption; Carbon tetrachloride; Cyclohexane;

Ethylbenzene; Extinction coefficient; Polymer; Polystyrene;

Solvent effects; J. 71A 2-449, 169-1 75 (1967).

Ultraviolet lines of Fe i; Atomic spectra; Iron; Oscillator

strengths; Transition probability; J. 70A 4-409, 325-371

(1966).

Ultraviolet photolysis; Carbon atom production; Carbon atom

reactions; Cyanogen azide; Force constants; Infrared spec- trum; NCN free radical; Thermodynamic properties; 9369.

Ultraviolet-visible; — 150 to +60 °C; Spectrophotometry; Thermostat; 9316.

Uncertainty; Accuracy; Mass measurement; Measurement;

Measurement process; Precision; Statistical control; Mono.

103. Unimolecular dissociation; Activated complex; Activated

molecules; Activated state; Decay; Dissociation; High pres- sure rate constant; Kinetics; Lifetime; Mass spectra; Metastable molecules; Predissociation; Quantum mechanics;

Resonance scattering; 9366.

United States; Atmospheric research; Electromagnetic;

Telecommunication; 9158.

United States measurement system; Accuracy; Calibrations;

Conferences, 1966 Standards Laboratory; Foreign standards

laboratories; Laboratory management; Measurements and

standards; Measurement system; National Conference of

Standards Laboratories; M291

Universal time; Frequency translator; Phase shifter; 9752.

Unsaturated alditols; Infrared spectra of acylamido derivatives; Carbohydrate reference materials; Metallo-organic standard

reference materials; Air-pollution studies; Oxidation of polycyclic aromatic hydrocarbons; Sugars in solution; Conformational analysis; TN405.

Uranium, spectrum; Spectrum, uranium; Self-reversal; Uranium

spectrum; J. 70A 4-408, 323-324 (1966).

Uranium dioxide; Compressibility; Elastic constants; Elastic compliances; Single crystal; Velocity of sound; 9173.

Uranium spectrum; Uranium, spectrum; Spectrum, uranium;

Self-reversal; J. 70A 4-408, 323-324 (1966).

Urban transportation; Data processing; Systems analysis;

Transportation planning; 9474.

URS (universal ratio set); VERI (versatile ratio instrument);

DRRS (direct readii.g ratio set); Junction; Precision measurements; Ratio; Resistor; Four-termmal; Resistance decade;

Transresistance; J. 70C 3-228, 169-172 (1966).

Use of heavy papers in preparative chromatography; Chromatography on seed-test paper; Large-scale paper chromatography; Radioactive carbohydrates; J. 71A 1-436, 49-52

(1967).

U-tube; Vacuum; Medium-vacuum measurements; Manometer;

Micrometer; TN42G.

U-tube; Vacuum measurement; Water; Manometers; Mercury;

Micrometer; Oil; 9413.

V

Vacancies; Correlation factors; Diffusion; Dilute alloys; Impurities; Jump frequencies; Solute atoms; 9464.

Vacancies; Vibrational states; Calculations; Electronic states, energies of formation; Energies of motion; Interstitials; Point

defects; Theory; M287.

Vacancies; Young's modulus; Internal friction; Lanthanum

titanate; Phase change; Resonance; Strontium titanate; 9447.

Vacancy; Annealing; Chain fold; Chain rotation; Chain twisting;

Defect; Dielectric relaxation; Mechanical relaxation;

Polychlorotrifluoroethylene; Polyethylene; Polymer;

Semicrystalline; 9462.

Vacuum; Adsorption; Barium fluoride; Electric hygrometer;

Humidity; Thin films; 7. 71C 3 -255, 199-207 (1967).

Vacuum; Dissociation; Fragment ions; Ionization; Mass spec- trometer; Molecule; NO2; NO2+ N2O+; Photoionization;

Threshold; Ultraviolet; J. l\S.5-467, 371-378 (1967).

Vacuum; Medium-vacuum measurements; Manometer;

Micrometer; U-tube; TN420.

Vacuum; Wavelengths; Carbon; Copper; Germanium; Ritz; Sil- icon; Spectrum; Standards; Ultraviolet; 9338.

Vacuum and pressure test; Adhesives; Boil test; Bonding; Exterior; Grading; Interior; Moisture content; Overlay;

Plywood; Shear test; PS 1-66.

198
Vacuum fusion; Inert gas fusion; Oxygen; Ferrous standard

reference materials; CO by infrared absorbancy; Homogeneity; Certified value; Eighteen cooperating laboratories; M260-14.

Vacuum gage calibration systems; Vacuum gages; Volumetric

pressure dividers; Bayard- Alpert gages; Cold cathode vacuum

gages; Conductance pressure dividers; Hot cathode vacuum

gages; Ionization gages; TN298.

Vacuum gages; Volumetric pressure dividers; Bayard-Alpert

gages; Cold cathode vacuum gages; Conductance pressure

dividers; Hot cathode vacuum gages; Ionization gages;

Vacuum gage calibration systems; TN298.

Vacuum index; Vacuum measurement; Bibliography; Low pres- sure measurement; Techniques of vacuum measurement;

Mono. 35 , Supplement 1

Vacuum measurement; Bibliography; Low pressure measurement; Techniques of vacuum measurement; Vacuum index;

Mono. 35, Supplement 1

Vacuum measurement; Water; Manometers; Mercury;

Micrometer; Oil; U-tube; 9413.

Vacuum monochromators; Autoionization; Electronic; Excited

states; H2O+; NH:,+ ; NH2+; OH+ ions; Heats of formation;

Ionization thresholds; Mass spectrometer; Photoionization;

J. 70A 6-417, 459-463 (1966).

Vacuum ultraviolet; Absorption; Carbon monoxide; Forbidden

transition; High resolution; Spectrum; 9330.

Vacuum ultraviolet; Acetylene; Combination; Ethane;

Ethylene; Flash photolysis; Gas phase; Hydrogen; Hydrogen

deuteride; Insertion; Methane; Methyne; Rate; 9286.

Vacuum ultraviolet; Apparatus description; Flash photolysis;

9287.

Vacuum ultraviolet; Atomic spectrum; Calculated wavelengths;

Nitrogen; Spectrum; 9339.

Vacuum-ultraviolet; Atomic; Collisions; Continuous; Deexcitation; He; He2; Metastable; Radiative; Spectra; Theory; 9367.

Vacuum ultraviolet; Carbene; Ethylene; Ethylidene; Gas phase:

Photolysis; Solid phase; 9415.

Vacuum ultraviolet; Fluorescence; Nitric oxide; Nitrogen dioxide; Nitrosyl chloride; 9416.

Vacuum ultraviolet; Fluorescence; Hydrazoic acid; NH;

Photolysis; 9417.

Vacuum ultraviolet; Insertion; Isobutane; Isobutylidene;

Photolysis; 9414.

Vacuum ultraviolet; Window seal; Electric discharge;

Resonance lamp; 9279.

Vacuum ultraviolet; Xenon; Atomic spectra; Krypton;

Photoionization; 9208.

Vacuum-ultraviolet region; Absorption spectrum; CO; Diatomic

spectrum; Electronic transition; Rotational analysis; 9403.

Vacuum ultraviolet standards; Atomic spectrum of silicon; Car- bon spectra; Electrodeless discharge; Germanium spectra;

Nitrogen spectra; Silicon i; Silicon spectra; 9337.

Valves; Bowls; Brass; Dimensions; Nuts; Plastic; Plimbing

equipment; Tanks; PS6-66.

Valve seat leakage; Leak detection; Leak flow rates; Leak rates; Leakage through valves; Predicting leak rates; Seal leakage;

TN355.

Vanadium in irons and steels; Activation analysis; Biological;

Botanical samples; Carbon in sodium; Cockroft-Walton

generator; Digital computers; Flux monitors; High precision 14 MeV neutron activation; Homogeneity testing; Instru- mentation; NBS Linac; NBS reactor; Photoneutron reactions; Self absorption corrections; Standard reference materials; TN428.

Van de Graaff; 14 MeV neutrons; "^'Ho; Black nucleus model;

Cryogenic target; Coupled-channel calculation; Nuclear align- ment; Nuclear deformation; Optical model; 9362.

Vapor deposition; Critical nucleus; Field-electron emission

microscopy; Heterogeneous nucleation; 9483.

Vaporization; Enthalpy; Heavier elements; Literature survey;

Refractory compounds; Thermodynamic; 9153.

Vapor phase; Aldehyde; Energy transfer; Photolysis; Triplet

state; 9385.

Vapor phase diffusion; Calcite; Crystal growth; Crystals; 9320.

Vapor pressure; Bias of least squares estimators; Coefficient of

variation; Correlated estimators; Enthalpy adjustments; Heat

of vaporization; High temperature chemistry; Overestimation

of standard deviation; Second law heat; J. 70A 6-424, 533-539,

(1966).

Vapor pressure; Calcium chloride; Mixed solutions; Activity

coefficients; Isopiestic measurements; J. 70A 4-405, 305-311 (1966).

Vapor pressure; Methanol-water solvents; Thermodynamics;

Acidity; Analytical chemistry; Conductance; Deuterium oxide; Dissociation processes; Electrochemistry; Electrolytes;

Emf; Indicators; Isopiestic; TN400.

Vapor pressure of aqueous solutions; Calcium chloride: Isopiestic measurements; Mixed salt solutions; Sodium chloride; J. 70A 4-406,313-318(1966).

Variables; Hermite-Fejer; Bernstein; Chebyshev; Approximations; Convergence; Multidimensional; Polynomials; Functions;y. im 3-182, 21 1-218 (1966).

Variation of the activation energy; Calculation of kinetic parameters; Determination of activation energies; Preexponential factor; Stability of polymers; Thermogravimetric

analysis; 9192.

Varying crystallinities; Apparatus; Isothermally crystallized

sample; Loss compliance; Loss modulus; Mechanical relaxation; Polychlorotrifluoroethylene; Quenched sample; Storage

modulus; Tan S; Torsion pendulum; 9441

Vector; Symmetry; Consistency; Frequency; Superposition;

Crystal; Structure; Patterson; 7. 70A 4-407. 319-321 ( 1966).

Vector bounds; Volterra vector integral equations; Asymptotic

solutions; Eigenvalues; Error term; Matrices; Norm bounds:

J. 70B 3-180. 167-186(1966).

Vector current; Axial-vector current; Chiral; G,i; G*; Representation-mixing; Sum-rules; 9353.

Velocity calibration; Mossbauer; Spectroscopy; Standard; Differential chemical shift; Quadrupole splitting; Random error; Systematic error; Sodium nitroprusside; Iron compounds; Optical Mossbauer spectrometer; Tandem Mossbauer spec- trometer: M26C»-/i.

Velocity of sound; Delay line: Frequency stability; Gage; High

pressure; Self-excited pulse repetition: Temperature compensation; Ultrasonics; 9331.

Velocity of sound; Uranium dioxide; Compressibility: Elastic constants; Elastic compliances; Single crystal; 9173.

VERI (versatile ratio instrument); DRRS (direct reading ratio

set); Junction; Precision measurements; Ratio; Resistor;

Four-terminal; Resistance decade: Transresistance; URS (u- niversal ratio set); 7. 70C 3-228, 169-172 (1966).

Very low frequency; Broadcast of standard frequencies; High

frequency; Low frequency; Standard frequencies; Time

signals; M236, 1967 Edition.

Very low frequency; Broadcast of standard frequencies: High

frequency; Low frequency; Standard frequencies: Time

signals: 9237.

V-grooves; Reflectance; Specular walls; Thermal radiation; J. 70C 4-238,275-280(1966).

VHF; VLF; HE; Noise; Satellite; Synchronization; Time and

frequency dissemination: TN357.

Vibrating-reed electrometer; Remote positioner; Rotary

switches; 9477.

Vibrating-sample magnetometer: Ferro- and ferrimagnetism;

Magnetization; Magnetometer calibration; Measurement of

magnetization; Saturation magnetization: J. 70C 4-236,

255-262 (1966).

Vibration; Accelerometer; Calibration; Comparison calibration; Frequency range; Shaker; 9306.

199
Vibrational; Frequencies; Data; Tables; Force; Constants;

Spectral; Molecular; NSRDS-NBS6.

Vibrational assignment; Vibrational fundamentals;

Chlorodifluoramine; Infrared spectra; Matrix-isolation; Spectra; 9294.

Vibrational excitation; Electron scattering; H2, H2";

Resonances; 9365.

Vibrational fundamentals; Chlorodifluoramine; Infrared spectra;

Matrix-isolation; Spectra; Vibrational assignment; 9294.

Vibrational state; 337-micron CN laser; Laser; Radiation; Rotational level; 9163.

Vibrational states; Calculations; Electronic states, energies of

formation; Energies of motion; Interstitials; Point defects; Theory; Vacancies; M287.

Vibration-rotation; Coriolis constant; Force field; Infrared; Osmium tetraoxide; 9349.

Vibration-rotation; {3; ^4; Band contours; BF3; Coriolis force; Force fields; High resolution; Infrared; v^; 9268.

Vibration spectra; Water librations; Cold neutrons; Coordination; Hydrated salts* Hydrates; Hydrogen-bonding; Neutron

scattering; 9505.

Vibration spectrum; Cold neutrons; Frequency; Inelastic scat- tering; Metal hydrides; Neutron scattering; Optical vibration; 9506.

Vibration standard; Air bearing; Ceramic moving element; Elec- trodynamic shaker; Piezoelectric accelerometers;

Reciprocity; Secondary standard; 9297.

Virial coefficients; Atoms; Compressibility; Heat of sublimation; Molecules; Potential functions; Empirical and semi-empirical; Transport properties; TN246.

Virial coefficients; Water vapor-air mixtures; Chemical association; Lennard-Jones potential parameters; J. 71A 3-454,

219-224 (1967).

Viscosity; Dense gases; Rigid disks; Rigid spheres; Thermal

conductivity; Transport coefficients; Triple collisions; 9399.

Viscosity; Dense gases; Rigid spheres; Thermal conductivity;

Transport properties; Triple collisions; 9400.

Viscosity; Viscosity standard; Beam bending; Fiber elongation;

Glass; Glass standard; Glass viscosity; Lead-silica glass;

Restrained sphere; Rotating cylinders; Standard; Standard

reference material; M260-1 1

Viscosity of parahydrogen; Liquid normal hydrogen;

Parahydrogen; Shear viscosity; Temperature dependence;

9201.

Viscosity standard; Beam bending; Fiber elongation; Glass;

Glass standard; Glass viscosity; Lead-silica glass; Restrained

sphere; Rotating cylinders; Standard; Standard reference

material; Viscosity; M260-1 1

Visibility; Alphanumeric characters; Displays; Handbook;

Human factors; Legibility; Psychology; Readability; Stan- dards; Symbols; Type faces: Typography; M262-2.

Visible radiation; Hot electrons; Silicon diodes; 9458.

Visible-ultraviolet spectrum; F atom reactions; Force constants; HNF; HNF2; Infrared spectrum; Matrix isolation; NF; NF2;

Thermodynamic properties; 9335.

VLF; HF; Noise; Satellite; Synchronization; Time and frequency dissemination; VHF; TN357.

Volatile content; Ash content; Elemental analysis; Homogeneity; Lithium content; Molecular weights; Polymer; Preparation; Purity; Sampling; Standard sample; 7. 71A 1-435, 43-47

(1967).

Voltage, high-frequency, calibration; Voltage measurements;

Voltage Tee; Calibration, high-frequency voltages; Measurement, microwave voltages; 9266.

Voltage; Volt box; Calibration; Console; Electrical; Measurement; Ratio; Standards;^. IdC 3-229, 173-185 (1966).

Voltage divider; Volt-box; Calibration; Errors; Heating; 9305.

Voltage-divider; Voltmeter; Alternating-current; Calibration;

Direct-current; High-voltage; Ratio; Safety; Standards enclosure; Transformer; TN349.

Voltage measurements; Voltage Tee; Calibration, high-frequency voltages; Measurement, microwave voltages; Voltage,

high-frequency, calibration; 9266.

Voltage standard; Control charts; Experiment design; Saturated

standard cells; Standard cells calibration; Statistics; T430.

Voltage Tee; Calibration, high-frequency voltages; Measurement, microwave voltages; Voltage, high-frequency, calibration; Voltage measurements; 9266.

Volt box; Calibration; Console; Electrical; Measurement; Ratio;

Standards; Voltage; 7. 70C 3-229, 173-185 (1966).

Volt-box; Calibration; Errors; Heating; Voltage divider; 9305.

Volt boxes; Calibration console; Console; High measurement

accuracies; Human engineering; 9184.

Volterra vector integral equations; Asymptotic solutions; Eigenvalues; Error term; Matrices; Norm bounds; Vector bounds;

J. 70B 3-180, 167-186(1966).

Voltmeter; Alternating-current; Calibration; Direct-current;

High-voltage; Ratio; Safety; Standards enclosure; Transformer; Voltage-divider; TN349.

Volt standard; Electromotive force; Standard cell facilities; Standard cell transfer; Standard cells; 9327.

Volume conductivity; Insulation conductance; Resistance;

Dielectric resistance; Resistivity; Dielectric constant; Permittivity; Dissipation factor; Loss index; Dielectric strength; Arc

resistance; Tracking; Measurements; Electrical testing; Conductance; 91 74. Volume flow; Accuracy; Calibration; Commodity transfer; Cryogenic; Cryogenic processes; Density; Flowmeters; Mass

flow; Mass flowmeters; Performance results; Propellant

management; Substitute fluid; 9428.

Volume relaxation; Annealing; Borosilicate crown glass; Glass;

Index of refraction; Relaxation times; Two-relaxation time

model;y. 71A 3-456, 231-238 (1967).

Volumetric measurement; Water density; Water weighing; Air

density; Balance; Balance calibration; Balance equilibrium;

Balance sensitivity; Density; Double substitution weighing;

Hydrostatic balance; Hydrostatic weighing; J. 71C 3-254,

179-198 (1967).

Volumetric pressure dividers; Bayard-Alpert gages; Cold

cathode vacuum gages; Conductance pressure dividers; Hot

cathode vacuum gages; Ionization gages; Vacuum gage

calibration systems; Vacuum gages; TN298.

Vulcanization; Zinc dibutyldithiocarbamate; Zinc dimethyldithiocarbamate; Accelerators; Far infrared; Natural rubber;

Sulfur; Tetramethylthiuram disulfide; J. 71A 1-432, 19-23

(1967).

w

Water; Manometers; Mercury; Micrometer; Oil; U-tube;

Vacuum measurement; 9413.

Water density; Water weighing; Air density; Balance; Balance

calibration; Balance equilibrium; Balance sensitivity; Density;

Double substitution weighing; Hydrostatic balance; Hydrostatic weighing; Silicon density; 7. llC 3-254, 179-198 (1967).

Water librations; Cold neutrons; Coordination; Hydrated salts; Hydrates; Hydrogen-bonding; Neutron scattering; Vibration

spectra; 9505.

Water vapor-air mixtures; Chemical association; Lennard-Jones

potential parameters; Virial coefficients; J. 71A 3-454,

219-224 (1967).

Water vapor concentration; Wavelength; Wavenumber;

Aerosol; Air mass; Ozone; Solar radiation; Spectral distribution; 9525.

Water vapor permeability; Absorption, water; Adsorption, water

vapor; Leather; Permeation; 9465.

Water weighing; Air density; Balance; Balance calibration; Balance equilibrium; Balance sensitivity; Density; Double

substitution weighing; Hydrostatic balance; Hydrostatic

200
weighing; Silicon density; Substitution balance; 7. 71C 3-254,

179-198 {1967).

Wavefunctions; Atomic term value; Oscillator strengths; J. 71A

2-448, 163-168 (1967).

Wavefunctions: Multiplet strength; Self-consistent field; Term

values; y.71A 2-447, 157-162 {1967}.

Wave functions; Single particle shell model; Eigenvalues; Eigenfunctions; Energy levels; TN410.

Wavelength; Wavenumber; Aerosol; Air mass; Ozone; Solar

radiation; Spectral distribution; Water vapor concentration;

9525.

Wavelengths. Si i; Atomic energy levels; Atomic spectra Si i; First spectrum; Multiplet table; Silicon; Spectrum, Si i; NSRDS-NBS3, Section 2. Wavelengths; Carbon; Copper; Germanium; Ritz; Silicon; Spectrum; Standards; Ultraviolet; Vacuum; 9338.

Wavelengths; X-ray emission; X-ray spectrometers; Electron

probe microanalyzer; TN406.

Wavelengths of solar lines; Elements in sun; Equivalent widths

of solar lines; Identification of solar lines; Molecules in sun; Solar spectrum; Mono. 61. Wavelengths of technetium; Spectra of technetium; Technetium,

spectra of; y. 71 A 6-471. 547-565 {1967).

Wavenumber; Aerosol; Air mass; Ozone; Solar radiation; Spectral distribution; Water vapor concentration; Wavelength;

9525.

Wave propagation; Characteristics; Impact; Linear

viscoelasticity; Partial differential equations; Stress waves;/.

70B 4-187. 257-264 {1966).

Weak electrolytes; Acetic acid-J^; Acid-base; Deuterium oxide;

Dissociation constants; Emf; Ionization; Isotope effects; Thermodynamics; 9492.

Weighing designs; Calibration: Calibration designs; Combinatorial analysis; Difference sets; Incomplete block designs;

Statistical experiment designs; Tournaments; J. 71B 4-237,

149-160 {1967).

Weights and measures; Conference. National; M290.

Weights and measures; Weights and measures abbreviations;

Weights and measures systems: Weights and measures units; Conversion tables; International System (SI); Metric System;

U. S. Customary System; M286.

Weights and measures abbreviations; Weights and measures

systems: Weights and measures units: Conversion tables; In- ternational System (SI); Metric System; U. S. Customary

System; Weights and measures; M286.

Weights and measures systems: Weights and measures units; Conversion tables: International System (SI); Metric System;

U. S. Customary System: Weights and measures: Weights and

measures abbreviations; M286.

Weights and measures units: Conversion tables; International

System (SI); Metric System: U. S. Customary System;

Weights and measures; \\'eights and measures abbreviations;

Weights and measures systems; M286.

Westward drift: Core-mantle coupling; Decade fluctuations; Dynamo theory; Earth's core: Geomagnetism; Rotation of the

earth: TN358.

Whisker growth; Curtis approximation: Dittmar-Neumann ap- proximation: Mean stay time; Stefan problem; Surface concentration: Surface self-diffusion: 9508.

Wien equation: Brightness temperature: Color temperature: Ef- fective wavelength; Infrared and far infrared optical

pyrometry: Planek equation; Rayleigh-J cans equation; Spectral radiance; 9310.

Wigner coefficients; Quantum theory of angular momentum: 3j coefficient: 6j coefficient; 9j coefficient; Clebsch-Gordan

coefficients; Fortran program: TN409.

Window seal: Electric discharge; Resonance lamp: Vacuum ul- traviolet; 9279.

Winter anomaly; Absorption, ionospheric; Ionospheric absorption; Stratospheric warnings: 9267.

Wire bar supports; Bars, concrete reinforcement: Concrete construction, supports: Reinforced concrete construction: Reinforcement bars; PS7-66.

Wirtinger: Inequalities: Norms;/. 70Bi-/S4, 22/-2i/ {1966).

Wood particleboard: Mat-formed particleboard; Particleboard

requirements: Particleboard. wood: CS236-66.

Work function; (110) plane; Energy distribution: Field emission;

Patch fields; Tungsten: 9424.

Work function: Adsorption: Chemisorption: Desorption: Dissociation: Field emission microscopy; Kinetic; Nitric oxide:

Surface; Surface diffusion; Tungsten: 9421

Work function: Energy distribution: Field emission; Patch

fields: Single crystal planes: 9423.

World days service: Radio science; 9189.

World trade: Developing countries: International standards:

Role of government; Role of private enterprise: Technology:

M2,84.

H^-s,„; Absorbed dose: Calorimeter: Cavity ionization chamber;

Cobalt-60 gamma rays; Comparison: Graphite; /. 71C 1-440,

19-27 {1967).

X

Xenon: Atomic spectra; Krypton; Photoionization: Vacuum ul- traviolet: 9208.

Xenon: Transport coefficients: Correlations; M-6; Kihara; Exp:

6. Morse: Potential functions: Dilute gases; Neon: Krypton:

TN352.

X-ray; Barium tetragermanate: Structure: Benitoite; Crystal; J. 70X5^1 1 .385-391 {1966).

X ray; Diffraction; Diffractometer: Neutrons; Simultaneous:

Three-circle; 9524.

X-ray back-reflection; Calcium molybdate: Crystal orientation; Crystallographic groups: Interplanar angles: Physical properties: Scheelite structure; Single crystal;/. 70X5-410.379-384

{1966).

X-ray diffraction: Constants: Crystal: Lattice: Measurements;

Powder-patterns: Reference-intensities: Standard: Structure; Mono. 25, Section 5. X-ray diffraction; Divergent x-ray beams; Kossel: Kossel sample preparation; Photographic contrast; Transmission of x

rays: 9521.

X-ray emission; X-ray spectrometers: Electron probe

microanalyzer: Wavelengths: TN406.

X-ray instrumentation; Divergent x-ray beam: Instrument

design; Kossel camera; Kossel method;/. 71C 4-262. 3 13-3 18

{1967).

X-rays; Absorption; Radiation; Spectroscopy; Ultraviolet; 9311. - X rays: Fiber optics; 9363.

X-rays; Fibers: Microfocus tubes: Microradiography: Nylon:

Polyacrylonitrile: Polyamides; Reflection of x-rays; Soft

x-rays; 9488.

X-ray spectra: Molecular energy levels: Molecules; 9443.

X-ray spectrochemical analysis: Microanalytical techniques:

Solids mass spectrometer; Electron probe microanalyzer;

NBS white cast iron sample (SRM 1175): Stainless steel powder metallurgy compact: Optical metallography;

Macroanalytical techniques; M260-12.

X-ray spectrometers; Electron probe microanalyzer;

Wavelengths; X-ray emission; TN406.

X-ray spectrometry; Scanning electron microscopy; Electron

backscatter: Cathodoluminescence: Electron probe;

Microanalysis: TN278.

X-ray spectroscopy: Analysis: Arc temperature: Atomic absorption spectrometry: Analog computer: Bibliography: Computer; Electrodeposition: Electron back scatter: Electron

probe microanalyzer: Emission spectroscopy: Laser probe;

Mass spectroscopy: TN401.

313-589 0-69— 14 201
X-ra\' spectroscopy': Electrochemical methods: Electron and optical microscopy: Nuclear methods; Optical spectroscopy':

Sy mposium on trace characterization: Trace characterization:

Mono. 100. X-ray wavelength: Absorption: Atomic: Data compilation;

Emission: Energy levels: S'SRDS-NBS 14. X-transitions: Critical phenomena; Critical point; Second order

phase transition; Singularities; Fade approximate fluctuations: Opalescence: .V1273.

Y

Yields: Detector: Efficiency: Four-pi; Halpern: Neutron;

Photoneutron: Response: T\'416.

\'ield stress; Elastic stress; Heat transfer; Plane strain; Thermal

stress: J. 70B 4-188. 265-272 (1966).

YIG: External tensor permeability: Ferrimagnetic resonance;

Ferrites; Garnet; Low magnetic field effects: Permeability:

Spin \va\'es: Tensor permeability: 9395.

Young"s modulus: Aluminum oxide: Corundum; Elastic constants; Shear modulus: J. 70A 4-403. 2 77-280 1 1 966 1. Young's modulus: Internal friction: Lanthanum titanate: Phase

change: Resonance: Strontium titanate: Vacancies: 9447.

y'-transform: Fourier-transform: Functional transforms;

Generalized MacRobert"s function; Hankel transform,

-transform; Laplace transform. MacRoberfs function: J. 71B 1-194. 23-37 (1967).

Ytterbium, second spectrum; Zeeman effect in "i'b ii: Analysis

of Yb ii: .Atomic energ\ le\ els of Yb n: Classified line of Yb

ii: Spectrum, Yb ii: J~71A 6-470, 396-545 (1967).

z

Zeeman effect: H^CO: Magnetic hyperfine structure; RF transition: 9412.

Zeeman effect in Yb ii: Analysis of Yb ii; .Atomic energy levels of Yb ii: Classified line of Yb ir. Spectrum. Yb ii; Ytterbium.

second spectrum: J. 71A 6^70. 396-545 (1967).

Zero-range; Cross section; Differential cross section: 'H; 'He; Photodisintegration: 9341

Zeros of Legendre polynomials: Gaussian quadrature; Integral

equations: Numerical integration: J. 70B 4-186. 249-256

(1966) . Zinc dibuty Idithiocarbamate: Zinc dimethy Idithiocarbamate;

Accelerators; Far infrared: Natural rubber: Sulfur; Tetramethylthiuram disulfide: N'ulcanization: J. 71.A. 1-432. 19-23 (1967).

Zinc dimethyldithiocarbamate: .Accelerators: Far infrared: Natural rubber: Sulfur: Tetramethylthiuram disulfide; \'ulcanization; Zinc dibutyldithiocarbamate: J. 1-432, 19-23

(1967) . Zirconia: .Alumina: Ceramic oxides: Emittance: Error sources: Magnesia; Measurement uncertainties; Spectral emittance:

Thermal radiation; Thoria; J. 70A5-412. 393-415 (1966 i. Zirconium hydrides: Beta zirconium hydrides: Statistical model;

9302.

ZnS; Electric fields: Ionic crystals; Lattice sums; Point defects: Polarization: NaCl: CsCl: CslF^.J. 71A 1-428. 1-2 (1967).

Zone refining: Crystal growth: Fermi surface; Orientation:

Potassium:^Spark cutting: J. 71X2-443. 127-132 (1967).

Zone refining: Fermi surface: Magnetoacoustic absorption;

Potassium: Single crystals; 9/97.

£3: ^: Band contours: BF^: Coriolis force; Force fields; High

resolution: Infrared: v-.,: Vibration-rotation; 9268.

Ii. Band contours: BEs: Coriolis force: Force fields: High

resolution; Infrared: ^^3: N'ibration-rotation; 6: 9268.

0.06 A resolution; Spectrograph: Synchrotron light; Grazing-incidence; 3-meter; Monochromator alignment: 9355.

1 .2-dideuteroethy lene; Ethylene: .Mass spectra: Photoionization; Ry dberg; Threshold energies: .Autoionization; 9281

1 .2-dihydronaphthalene: Degradation: Polymerization: Pyrolysis: Thermal decomposition: Thermal volatilization: 9218.

1.2-0-isopropy lidene-/3-L-idofuranose; 2.3-0-isopropylidene-^-

D-threo-pentuIofuranose; Air pollution studies; Characterization of chemical structures; Disaccharide of d-lyxofuranose:

Infrared absorption methods for analysis of carbohydrates:

TN427.

1-acylamido sugars; .Aldofuranoid sugars: .Aldopy ranoid sugars: Infrared spectra: Absorption spectra: .Acy clic sugars; J . 71.A 1-437.53-79 (1967).

1 -r-butoxy-2.3.5.6-tetrafluoro-4-trifiuoromethylbenzene; Per- fluoro-p-quinonemethide: Polymerization; Poly-p-oxy per- fluorobenzylene: Pyrolysis; 2.3.5.6-tetrafluoro-4-trinuoromethyiphenol: J. 71A 1-434, 33-41 (1967).

100 Me\'-40 K.W LIN.AC: Clean room; Computers: Counting

rooms: Feedback analysis: Optimization of variables 10 MW

nuclear reactor: Pneumatic tubes: Radiochemical laboratories; 14 Me\' neutron generator: 9154.

(110) plane: Energy distribution; Field emission: Patch fields: Tungsten: Work function: 9424.

14 MeV neutron generator: 100 MeV-40 KW LIN.AC; Clean room; Computers: Counting rooms: Feedback analysis: Optimization of variables 10 MW nuclear reactor; Pneumatic

tubes: Radiochemical laboratories: 9154.

14 MeV neutrons: ''^'^Ho: Black nucleus model: Cryogenic target: Coupled-channel calculation: Nuclear alignment; Nuclear

deformation; Optical model; \'an de Graaff: 9362.

"^'Ho; Black nucleus model; Cryogenic target: Coupled-channel

calculation: Nuclear alignment: Nuclear deformation; Optical

model: Van de Graaff; 14 MeV neutrons: 9362.

2 .3 .5 .6-tetrafluoro-4-trifluoromethy Iphenol ; 1 -r-butoxy'-2 .3 .5 .6- tetrafiuoro-4-trifiuoromethylbenzene; Pertluoro-p-quinonemethide: Polymerization; Poly-p-oxy perfluorobenzylene:

Pyrolysis: J. 71A 1-434, 33-41 (1967).

2.3-0-isopropylidene-^-D-threo-pentulofuranose: Air pollution

studies; Characterization of chemical structures; Disaccharide

of d-ly xofuranose; Infrared absorption methods for analysis of

carbohydrates; Naturally occurring monosaccharides and

6-deoxy sugars; TS427

2-methylbutane: 3-methylpentane; Ion-molecule reaction; Liquid phase photolysis; Liquid phase radiolysis: 9392.

200 Watts (30 'K): Design: Expansion turbine: Gas bearings:

Helium refrigeration: Pert:"'ormance; 9800 RPS: 9151.

•H: -'He: Photodisintegration: Zero-range: Cross section: Differential cross section; 9341

'He: Photodisintegration; Zero-range: Cross section; Differential cross section: -'H: 9341

3j coefficient: 6j coefficient: 9j coeftlcient; Clebsch-Gordan

coefficients; Fortran program: Wigner coefficients; Quantum

theory of angular momentum; TS409.

3-manifold; 3-sphere; Free group: Handlebody; Homeomorphism: SimpK connected; Topolog\ ; J. 71B 2&3-I97. 53-56

(1967).

3-meter; Monochromator alignment: 0.06 A resolution; Spectrograph; Sy nchrotron light; Grazing-incidence; 9355.

3-methy Ipentane; Ion-molecule reaction: Liquid phase photolysis: Liquid phase radiolysis: 2-meth\ Ibutane; 9392.

3-sphere: Free group; Handlebody; Homeomorphism: Simply

connected: Topolog\ ; 3-manifold: J. 71B 2&3-197. 53-56

(1967).

337-micron CN laser: Laser: Radiation; Rotational le\ el; \'ibra- fional state; 9163.

405 representation; Higher symmetry scheme; A quark content; Nonet of 2"" mesons: Sch\\inger mass formula: SL'(6)ir:

9332.

202
4-3m symmetry; Angular dependence: Hexadecapole: Hexadecapole transitions; Phonon interactions; Saturation factor; 9357.

6j coefficient; 9j coefficient; Clebsch-Gordan coefficients; Fortran program; Wigner coefficients; Quantum theory of angular

momentum; 3j coefficient; TN409.

— 150 to +60 "C; Spectrophotometry; Thermostat;

Ultraviolet-visible; 9316.

9j coefficient; Clebsch-Gordan coefficients; Fortran program;

Wigner coefficients; Quantum theory of angular momentum;

3j coefficient; 6j coefficient; TN409.

9800 RPS; 200 Watts (30 °K); Design; Expansion turbine; Gas

bearings; Helium refrigeration; Performance; 9757.

203
II
APPENDIX A. LIST OF DEPOSITORY LIBRARIES IN THE UNITED STATES

ALABAMA

Auburn: Auburn University Library.

Birmingham

Howard College, Harwell G. Davis Library.

Birmingham Southern College, M. Paul Phillips

Library.

Public Library.

Sanford Library.

Florence: Florence State College, Collier Library.

Gadsen: Gadsen Public Library.

Huntsville: University of Alabama in Huntsville

Library.

Jacksonville: State Teachers College Library.

Maxwell A.F. Base: Air University Library.

Mobile: Mobile Public Library.

Mobile (Spring Hill): Spring Hill College, Thomas

Byrne Memorial Library.

Montgomery:

Department of Archives and History Library.

Supreme Court Library of Alabama.

Normal: Alabama Agricultural and Mechanical College,

Carnegie Library.

St. Bernard: St. Bernard College Library.

Troy: Troy State College Library.

Tuskegee Institute: Hollis Burke Frissell Library.

University: University of Alabama Library—REGIONAL.

ALASKA

Anchorage

Anchorage Community College Library.

Anchorage Methodist University Library.

College: University of Alaska Library.

Juneau: Alaska State Library.

AMERICAN SAMOA

Pago Pago: Library of American Samoa.

ARIZONA

Flagstaff:

Arizona State College Library.

Northern Arizona University.

Phoenix

Department of Library and Archives—REGIONAL.

Phoenix Public Library.

Tempe: Arizona State University, Matthews Library.

Thatcher: Eastern Arizona Junior College Library.

Tucson: University of Arizona Library—REGIONAL.

Yuma: Yuma City-County Library.

ARKANSAS

Arkadelphia: Ouachita Baptist College Library.

Batesville: Arkansas College Library.

Clarksville: College of the Ozarks Library.

College Heights: Arkansas Agricultural and Mechanical College Library.

Conway: Hendrix College, The H. F. Buhler Library.

Fayetteville : University of Arkansas Library.

Little Rock:

Little Rock Public Library.

Supreme Court Library.

Magnolia: Southern State College, J. M. Peace Library.

Russellville: Arkansas Polytechnic College Library.

Searcy: Harding College Beaumont Memorial Library.

State College: Arkansas State College Library.

CALIFORNIA

Anaheim: Anaheim Public Library.

Areata: Humboldt State College Library.

Bakersfield: Kern County Free Library.

Berkeley:

Earl Warren Legal Center Library of Univ. of California at Berkeley.

University of California Library.

Chico: Chico State College Library.

Claremont: Pomona College, Honnold Library.

Culver City: Culver City Library.

Davis: University of California Library.

Downey: Downey City Library.

Fresno:

Fresno County Free Library.

Fresno State College Library.

Fullerton: California State College at Fullerton Library.

Gardena: Gardena Library.

Goleta: University of California at Santa Barbara Library.

Hayward: California State College Library at Hayward.

Inglewood: Inglewood Public Library.

Irvine: University of California at Irvine Library.

La Jolla: University of California at La Jolla Library.

Lancaster: Antelope Valley College Library.

Long Beach:

California State College Library at Long Beach.

Public Library.

Los Angeles:

California State College at Los Angeles, John F. Kennedy Memorial Library.

Los Angeles County Law Library.

Los Angeles Public Library.

Loyola University of Los Angeles Library.

Occidental College Library.

Pepperdine College Library.

University of California at Los Angeles Library.

University of California, School of Law Library.

University of Southern California Library.

Lynwood: Lynwood Library.

Marysville: Yuba College District Library.

Menlo Park: Dept. of Interior, Geological Survey Library.

Montebello: Rio Hondo Regional Library.

Monterey: Naval Postgraduate School Library.

Monterey Park: Bruggemeyer Memorial Library.

Northridge: San Fernando Valley State College Library.

Oakland: Oakland Public Library.

Orange: Orange County Free Library.

Pasadena:

California Institute of Technology Library.

Pasadena Public Library.

Pleasant Hill: Contra Costa County Library.

Redding: Shasta County Free Library.

Redlands: University of Redlands Library.

Reseda: West Valley Regional Branch Library.

Richmond: Richmond Public Library.

Riverside:

Riverside Public Library.

University of California at Riverside Library.

Sacramento:

California State Library—REGIONAL.

City Free Library.

Sacramento County Law Library.

Sacramento State College Library.

San Bernardino: San Bernardino College Library.

San Diego:

San Diego County Library.

San Diego Public Library.

San Diego State College Library.

San Francisco:

Mechanics Institute Library.

San Francisco Public Library.

San Francisco State College, Social Science and

Business Library.

205
Univ. of San Francisco, Richard A. Gleeson Library.

San Jose: San Jose State College Library.

San Leandro: San Leandro Community Library Center.

Santa Ana: Santa Ana Public Library.

Santa Clara: University of Santa Clara, Michel Orradre Library.

Santa Cruz: University of California at Santa Cruz,

University Library.

Santa Rosa: Santa Rosa Public Library.

Stanford: Stanford University Libraries.

Stockton: Stockton Fres Public Library.

Thousands Oaks. California Lutheran College Library.

Turlock: Stanislaus State College Library.

Walnut: Mt. San Antonio College Library.

West Covena: West Covena Library.

Whittier: Whittier College Library.

CANAL ZONE

Balboa Heights: Canal Zone Library.

COLORADO

Alamosa: Adams State College Library.

Boulder: University of Colorado Library—REGIONAL.

Colorado Springs: Colorado College, Charles Leaming

Tutt Library.

Denver:

Colorado State Library.

Dept. of Interior, Bur. of Reclamation Library.

Public Library—REGIONAL.

Regis College Library.

University of Denver, Mary Reed Library.

Fort Collins: Colorado State University Library.

Golden: Colorado School of Mines Library.

Greeley: Colorado State College.

Gunnison: Western State College Library.

La Junta:

Otero Junior College, Wheeler Library.

Pueblo:

McClelland Public Library.

Southern Colorado State College Library.

U.S. Air Force Academy: Academy Library.

CONNECTICUT

Bridgeport: Pridgeport Public Library.

Bristol: Public Library.

Hartford

Connecticut State Library—REGIONAL.

Hartford Public Library.

Trinity College Library.

Middletown: Wesleyan University, Olin Library.

Mystic: Mystic Seaport Library.

New Haven: Yale University Library.

New London:

Connecticut College, Palmer Library.

U.S. Coast Guard Academy Library.

Storrs: University of Connecticut Library.

Waterbury: Silas Branson Library.

DELAWARE

Dover:

Delaware State College Library.

State Law Library.

Newark: University of Delaware, Morris Library.

Wilmington: Wilmington Institute Free Library.

DISTRICT OF COLUMBIA

Washington:

Bureau of the Budget Library, Exec. Office of the

President.

Civil Service Commission Library.

Department of Commerce Library.

Department of Health, Education, and Welfare

Library.

Department of Interior Central Library.

Department of Interior, Geological Survey Library.

Department of Justice Main Library.

Department of State Library.

National Agricultural Library.

National War College Library.

Navy Department Library.

Navy Department, Office of Judge Advocate General Library.

Post Office Department Library.

Public Library.

Treasury Department Library.

FLORIDA

Boca Raton: Florida Atlantic University Library.

Coral Gables: University of Miami Library.

Daytona Beach: Volusia County Public Libraries.

De Land: John B. Stetson University, Sampson Library.

Gainesville: University of Florida Library—REGIONAL.

Jacksonville:

Jacksonville Public Library.

Jacksonville University Library.

Lakeland: Park Trammell Public Library.

Leesburg: Lake-Sumter Junior College Library.

Melbourne: Brevard Engineering College Library.

Miami: Miami Public Library.

Orlando: Florida Technological University.

Palatka: St. Johns River Junior College Library.

Pensacola: University of West Florida.

Tallahassee:

Florida Agricultural and Mechanical University

Library.

Florida State Library.

Florida State University Library.

Tampa:

Tampa Public Library.

University of South Florida Library.

University of Tampa Library.

Winter Park: Rollins College, Mills Memorial Library.

GEORGIA

Albany: Albany Public Library.

Americus: Georgia Southwestern College.

Athens: University of Georgia Libraries.

Atlanta:

Atlanta Public Library.

Atlanta University, Trevor Arnett Library.

Emory University, Asa Griggs Candler Library.

Georgia Institute of Technology, Price Gilbert Memorial Library.

Georgia State Library.

Augusta: Augusta College Library.

Brunswick: Brunswick Public Library.

Carrollton: West Georgia College Library.

Dahlonega: North Georgia College Library.

Macon: Mercer University Library.

Milledgeville: Woman's College of Georgia Library.

Savannah: Savannah Public Library.

Statesboro: Georgia Southern College Library.

Valdosta: Valdosta State College Library.

GUAM

Agana: Nieves M. Flores Memorial Library.

HAWAII

Hilo: University of Hawaii, Hilo Campus Library.

Honolulu:

Chaminade College Library.

Library of Hawaii.

Municipal Reference Library.

University of Hawaii Library.

Laie: Church College of Hawaii Library.

Wailuku: Maui County Library.

IDAHO

Boise:

Boise College Library.

Boise Public Library.

206
Idaho State Law Library.

Caldwell: The College of Idaho, Strahorn Memorial

Library.

Moscow: University of Idaho Library—REGIONAL.

Pocatello: Idaho State University Library.

Rexburg: Ricks College Library.

ILLINOIS

Bloomington: Illinois Wesleyan University Libraries.

Carbondale: Southern Illinois University Library.

Champaign: University of Illinois Law Library.

Carlinville: Blackburn College Library.

Charleston: Eastern Illinois University, Booth Library.

Chicago:

Chicago National Historical Museum Library.

Chicago Public Library.

Chicago Teachers College Library.

Chicago Teachers College, North Campus Library.

Illinois Teachers College.

John Crerar Library.

Loyola University Library.

Newbury Library.

University of Chicago Law Library.

University of Chicago Libraries.

University of Illinois, Chicago Circle Campus Library.

Decatur: Decatur Public Library.

De Kalb: Northern Illinois University Library.

Edwardsville: Southern Illinois University, Edwardsville Service Center Library.

Elsah: Principia College, Marshall Brooks Library.

Evanston: Northwestern University Library.

Freeport: Freeport Public Library.

Galesburg: Galesburg Public Library.

Jacksonville: McMurray College Library.

Kankakee: Olivet Nazarene College Library.

Lake Forest: Lake Forest College, Donnelley Library.

Lisle: St. Procopius College Library.

Lockport: Lewis College of Science and Technology

Library.

Macomb: Western Illinois University Memorial

Library.

Monmouth: Monmouth College Library.

Normal: Illinois State Normal University Library.

Oak Park: Oak Park Public Library.

Peoria:

Bradley University Library.

Peoria Public Library.

River Forest: Osary College Library.

Rock Island: Rock Island Public Library.

Rockford: Public Library.

Springfield: Illinois State Library—REGIONAL.

Urbana: University of Illinois Library.

Wheaton: Wheaton College Library.

Woodstock: Woodstock Public Library.

INDIANA

Anderson: Anderson College, Charles E. Wilson Library.

Bloomington: Indiana University Library.

Crawfordsville: Wabash College Library.

Evansville: Evansville Public Library.

Fort Wayne:

Indiana-Purdue University Regional Campus Library.

Public Library.

Gary:

Gary Public Library.

Indiana University Northwest Campus Library.

Greencastle: De Pauw University Library.

Hammond: Hammond Public Library.

Hanover: Hanover College Library.

Huntington: Huntington College Library.

Indianapolis:

Butler University, Irwin Library.

Indiana State Library—REGIONAL.

Indianapolis Public Library.

Jeffersonville: Indiana University, Southeastern Campus Library.

Lafayette: Purdue University Library.

Muncie:

Ball State Teachers College Library.

Public Library.

Notre Dame: University of Notre Dame Library.

Rensselaer: St. Joseph's College Library.

Richmond

Earlham College, Lilly Library.

Morrison-Reeves Library.

South Bend: Indiana University, South Bend-Mishawaka Campus Library.

Terre Haute: Indiana State College Library.

Valparaiso: Valparaiso University Library.

IOWA

Ames: Iowa State University of Science and Technology Library.

Cedar Falls: State College of Iowa Library.

Council Bluffs: Free Public Library.

Des Moines:

Iowa State Traveling Library.

Public Library.

Dubuque: Carnegie Stout Free Public Library.

Fairfield: Parsons College Library Branch of Fairfield

Free Public Library.

Grinnell: Grinnell College Library.

Iowa City: State University of Iowa Library—REGIONAL.

Lamoni: Graceland College Library.

Mount Vernon: Cornell College Library.

Sioux City: Public Library.

Spencer: Spencer Public Library.

KANSAS

Atchison: St. Benedict's College, The Abbey Library.

Baldwin City: Baker University Library.

Emporia: Kansas State Teachers College, William Allen

White Library.

Hays: Fort Hays Kansas State College, Forsyth

Library.

Hutchinson: Hutchinson Public Library.

Lawrence: University of Kansas Library.

Manhattan: Kansas State University Library.

Pittsburgh: Kansas State College of Pittsburg, Porter

Library.

Salina: Kansas Wesleyan University Library.

Topeka:

Kansas State Historical Society Library.

Kansas State Library.

Wichita: Wichita State University Library.

KENTUCKY

Ashland: Ashland Public Library.

Barbourville: Union College, Abigal E. Weeks Memorial Library.

Bowling Green: Western Kentucky State Teachers College Library.

Danville: Centre College Library.

Elizabethtown: Oxbow Regional Library.

Frankfort: State Law Library.

Lexington: University of Kentucky Library.

Louisville:

Louisville Free Public Library.

University of Louisville Library.

Morehead: Morehead State College, Johnson Camden

Library.

Murray: Murray State College Library.

Owensboro: Kentucky Wesleyan College Library.

Pikeville: Pikeville College Library.

Richmond: Eastern Kentucky University Library.

LOUISIANA

Baton Rouge:

Louisiana State University Law Library.

Louisiana State University Library—REGIONAL.

207
Southern University Library.

Hammond: Southeastern Louisiana College Library.

Lafayette: University of Southwestern Louisiana Library.

Lake Charles: McNeese State College Library.

Monroe: Northeast Louisiana State College, Sandel

Library.

Natchitoches: Northwestern State College of Louisiana.

New Orleans:

Law Library of Louisiana.

Louisiana State University Library.

Loyola University Library.

New Orleans Public Library.

Southern University in New Orleans Library.

Tulane University, Howard-Tilton Memorial Library.

Ruston: Louisiana Polytechnic Institute Library—REGIONAL.

Shreveport: Shreve Memorial Library.

Thibodaux: Francis T. Nicholls State College Library.

MAINE

Augusta: Maine State Library.

Bangor: Bangor Public Library.

Brunswick: Bowdoin College Library.

Lewiston: Bates College Library.

Orono: University of Maine Library—REGIONAL.

Portland:

Portland Public Library.

University of Maine Law Library.

Springvale: Nasson College Library.

Waterville: Colby College Library.

MARYLAND

Annapolis:

Maryland State Library.

U.S. Naval Academy Library.

Baltimore:

Enoch Pratt Free Library.

Goucher College Library.

Johns Hopkins University Library.

Morgan State College Library.

Peabody Institute Library.

Bethesda: Montgomery County Department of Public

Libraries.

Chestertown: Washington College, George Avery

Bunting Library.

College Park: University of Maryland Library

REGIONAL.

Germantown: Atomic Energy Commission Library.

Salisbury: Salisbury State College Library.

Westminster: Western Maryland College Library.

MASSACHUSETTS

Amherst:

Amherst College Library.

University of Massachusetts, Goodell Library.

Boston:

Boston Athenaeum Library.

Boston College Libraries.

Northeastern University, Dodge Library.

Public Library of the City of Boston.

State Library of Massachusetts—REGIONAL.

Brookline: Public Library.

Cambridge

Harvard College Library, Serials Division.

Massachusetts Institute of Technology Library.

Lowell: Lowell Technological Institute Library.

Lynn: Lynn Public Library.

Medford: Tufts University Library.

New Bedford: Public Library.

North Dartmouth: Southeastern Massachusetts Technological Institute Library.

North Easton: Stonehill College, Cushing-Martin

Library.

Waltham: Brandeis University Library.

Wellesley Wellesley College Library.

Wenham: Gordon College, Winn Library.

Williamstown: Williams College Library.

Worcester:

American Antiquarian Society Library.

Free Public Library.

MICHIGAN

Albion: Albion College Library.

Allendale: Grand Valley State College Library.

Alma: Alma College, Monteith Library.

Ann Arbor: University of Michigan, General Library.

Battle Creek: Willard Library.

Benton Harbor: Benton Harbor Public Library.

Bloomfield Hills: Cranbrook Institute of Science

Library.

Dearborn: Henry Ford Community College Library.

Detroit:

Detroit Public Library—REGIONAL.

Marygrove College Library.

Mercy College Library.

University of Detroit Library.

Wayne County Public Library.

Wayne State University Library.

East Lansing: Michigan State University Library.

Escanaba: Michigan State Library, Upper Peninsula

Branch.

Flint: Flint Junior College Library.

Grand Rapids: Grand Rapids Public Library.

Houghton: Michigan College of Mining and Technology

Library.

Kalamazoo:

Public Library.

Western Michigan University, Dwight B. Waldo

Library.

Lansing: Michigan State Library—REGIONAL.

Livonia: Schoolcraft College Library.

Marquette: Northern Michigan College, Olson Library.

Mt. Pleasant: Central Michigan, University Library.

Muskegon: Hackley Public Library.

Petoskey: North Central Michigan College Library.

Port Huron: Port Huron Public Library.

Rochester: Oakland University Library.

Saginaw: Hoyt Public Library.

Traverse City: Northwestern Michigan College, Mark

Osterlin Library.

University Center: Delta College Library.

Ypsilanti: Eastern Michigan University Library.

MINNESOTA

Bemidji: Bemidji State College Library.

CoUegeville: St. Johns University Library.

Duluth: Duluth Public Library.

Mankato: Mankato State College Library.

Minneapolis:

Public Library.

University of Minnesota Library—REGIONAL.

Moorhead: State College Library.

Morris: University of Minnesota, Morris Library.

Northfield:

Carleton College Library.

St. Olaf College Library.

St. Cloud: St. Cloud State College Library.

St. Paul:

Minnesota Historical Society Library.

Minnesota State Law Library.

St. Paul Public Library.

Saint Peter: Gustavus Adolphus College Library.

Stillwater: Stillwater Public Library.

Willmar: Kandiyohi County-Willmar Library.

MISSISSIPPI

Columbus: Mississippi State College for Women, J. C. Fant Memorial Library.

Hattiesburg: University of Southern Mississippi

Library.

208
Jackson:

Millsaps College, Millsaps- Wilson Library.

Mississippi Library Commission.

Mississippi State Library.

State College: Mississippi State University, Mitchell

Memorial Library.

University: University of Mississippi Library.

MISSOURI

Cape Girardeau: Kent Library Southeast Missouri

State College.

Columbia: University of Missouri Library.

Fayette: Central Methodist Colhge Library.

Fulton: Westminster College Library.

Hannibal: Free Public Library.

Jefferson City:

Lincoln University Library.

Missouri State Library.

Missouri Supreme Court Library.

Joplin: Missouri Southern College Library.

Kansas City:

Kansas City Public Library.

Rockhurst College Library.

University of Kansas City Library.

Kirkville: Northeast Missouri State Teachers College

Library.

Liberty: William Jewell College Library.

RoUa: School of Mines & Metallurgy Library.

St. Joseph: St. Joseph Public Library.

St. Louis:

St. Louis Public Library.

St. Louis University Library.

University of Missouri at St. Louis Library.

Washington University Libraries.

Springfield:

Drury College Library.

Southwest Missouri State College Library.

Warrensburg: Central Missouri State College Library.

MONTANA

Billings: Eastern Montana College Library.

Bozeman: Montana State College Library.

Butte: Montana School of Mines Library.

Helena: Historical Society of Montana Library.

Missoula: State University of Montana Library—REGIONAL.

NEBRASKA

Blair: Dana College Library.

Crete: Whitin Library of Doane College.

Fremont: Midland College Library.

Hastings: Hastings Public Library.

Kearney: Nebraska State Teachers College Library.

Lincoln:

Nebraska State Library.

University of Nebraska Libraries.

Omaha:

Creighton University, Alumni Library.

Municipal University of Omaha Library.

Omaha Public Library.

Scottsbluff: Scottsbluff Public Library.

NEVADA

Carson City: Nevada State Library.

Las Vegas: University of Nevada, Southern Regional

Division Library.

Reno: University of Nevada Library—REGIONAL.

NEW HAMPSHIRE

Concord: New Hampshire State Library.

Durham: University of New Hampshire Library.

Hanover: Dartmouth College Library.

Manchester:

City Library.

St. Anselm's College, Geisel Library.

NEW JERSEY

Atlantic City: Free Public Library.

Bayonne: Free Public Library.

Bloomfield: Free Public Library.

Camden: Camden Free Public Library.

Convent Station: Santa Maria Library of College of

St. Elizabeth.

East Orange: East Orange Public Library.

Elizabeth: Public Library.

Glassboro: Glassboro State College, Savitz Library.

Hackensack: Johnson Free Public Library.

Jersey City:

Free Public Library.

Jersey City State College Library.

Madison: Drew University, Rose Memorial Library.

New Brunswick:

Free Public Library.

Rutgers University Library.

Newark: Public Library—REGIONAL.

Passaic: Passaic Public Library.

Princeton: Princeton University Library.

Rutherford: Fairleigh Dickinson University Library.

South Orange: Seton Hall University Library.

Teaneck: Fairleigh Dickinson University Library.

Toms River: Ocean County College Library.

Trenton

Division of State Library, Archives and History

Department of Education.

Free Public Library.

West Long Branch: Monmouth College, Guggenheim

Memorial Library.

West New York: West New York Free Public Library.

Woodbridge: The Free Public Library of Woodbridge.

NEW MEXICO

Albuquerque: University of New Mexico.

Las Vegas: New Mexico Highlands University, Rodgers

Library.

Portales: Eastern New Mexico University Library.

Santa Fe:

New Mexico State Law Library.

New Mexico State Library, State Library Extension Service—REGIONAL.

University Park: New Mexico State University Library.

NEW YORK

Albany:

New York State Library—REGIONAL.

State University of New York at Albany Library.

Binghampton: Harpur College Library.

Brooklyn:

Brooklyn College Library.

Brooklyn Public Library.

Polytechnic Institute Library.

Pratt Institute Library.

State University of New York, Downstate Medical

Center Library.

Buffalo:

Buffalo and Erie County Public Library.

Buffalo and Erie County Public Library, Grosvenor

Reference Division.

State University of New York at Buffalo, Lockwood Memorial Library.

Canton: St. Lawrence University Library.

Corning: Corning Community College Library.

Cortland: State University College Library.

Elmira: Elmira College Library.

Farmingdale: State University Agricultural and Technical Institute Library.

Flushing: Queens College Library.

Garden City: Adelphia University Library.

Greenvale: C. W. Post College Library.

Hamilton: Colgate University Library.

Hempstead:

Hofstra University Library.

Nassau Library System.

209
Ithaca:

Albert R. Mann Library, New York State Colleges

of Agriculture and Home Economics.

Cornell University Library.

Jamaica:

Queens Borough Public Library.

St. Johns University Library.

Kings Point: U.S. Merchant Marine Academy Library.

Mount Vernon Public Library.

New Paltz: State University College Library.

New York City:

College of the City New York Library.

College of Insurance Library.

Columbia University Library.

Cooper Union Library.

Fordham University Library.

New York Law Institute Library.

New York Public Library (Astor Branch).

New York Public Library (Lenox Branch).

New York University, University Heights Library.

State University of New York, Maritime College

Library.

Newburgh: Newburgh Free Library.

Oakdale: Adelphi Suffolk College Library.

Oneonta: State University College Library.

Oswego: State University College Library.

Potsdam:

Clarkson College of Technology Library.

State University College Library.

Poughkeepsie: Vassar College Library.

Rochester:

Rochester Public Library.

University of Rochester Library.

St. Bonaventure: St. Bonaventure College Library.

Saratoga Springs: Skidmore College Library.

Schnectady: Union College Library.

Staten Island: Wagner College, Horrmann Library,

Grymes Hill. Stony Brook: State University of New York Library.

Syracuse: Syracuse University Library.

Troy: Troy Public Library.

Utica: Utica Public Library.

West Point: U.S. Military Academy.

Yonkers: Yonkers Public Library.

NORTH CAROLINA

Asheville: Asheville-Biltmore College Library.

Boone: Appalachian State Teachers College, Dauphin

Disco Dougherty Memorial Library.

Buies Creek: Campbell College, Carrie Rich Memorial

Library.

Chapel Hill: University of North Carolina Library

REGIONAL.

Charlotte

Public Library of Charlotte & Mecklenburg Co.

Queens College Library.

University of North Carolina at Charlotte, Atkins

Library.

CuUowhee: Western Carolina College Library.

Davidson: Library of Davidson College.

Durham: Duke University Library.

Greensboro:

Agricultural and Technical College Library.

Univ. of N. Carolina at Greensboro, Walter Clinton

Jackson Library.

Greenville: East Carolina College Library.

Murfreesboro: Chowan College Library.

Pembroke: Pembroke State College Library.

Raleigh:

D. H. Hill Library of North Carolina State College.

North Carolina State Library.

Salisbury: Catawba College Library.

Wilmington: Wilmington College Library.

Wilson: Atlantic Christian College, Clarence L. Hardy

Library.

Winston-Salem:

Public Library of Winston-Salem and Forsyth

County.

Wake Forest College Library.

NORTH DAKOTA

Bismarck:

State Historical Library.

State Law Library.

Fargo

Fargo Public Library:

North Dakota State University of Agriculture and

Applied Sciences Library.

Grand Forks: University of North Dakota Library.

Minot: State Teachers College Library.

Richardton: Assumption Abbey Jr. College Library.

Valley City: State Teachers College Library.

OHIO

Ada: Ohio Northern University, J. P. Taggart Library.

Akron:

Akron Public Library.

University of Akron Library.

Alliance: Mt. Union College Library.

Ashland: Ashland College Library.

Athens: Ohio University Library.

Bluffton: Musselman Library of Bluffton College.

Bowling Green: Bowling Green State University

Library.

Cincinnati:

Public Library of Cincinnati and Hamilton County.

University of Cincinnati Library.

Cleveland:

Cleveland Public Library.

Cleveland State University Library.

Freiberger Library of Western Reserve University.

John Carroll University, Grasselli Library.

Columbus:

Columbus Public Library.

Ohio State Library—REGIONAL.

Ohio State University Library.

Dayton:

Dayton and Montgomery County Public Library.

Miami University-Ohio State University, Dayton

Campus Library.

Delaware: Charles Slocum Library of Ohio Wesleyan

University.

Elyria: Elyria Public Library.

Gambler: Kenyon College Library.

Granville: Denison University Library.

Hiram: Hiram College Library.

Kent: Kent State University Library.

Marietta: Marietta College Library.

New Concord: Muskingum College Library.

Oberlin: Oberlin College Library.

Oxford: Miami University Library.

Portsmouth: Free Public Library.

Springfield: Warder Public Library.

Steubenville: Carnegie Library.

Tiffin: Heidelberg College Library.

Toledo:

Toledo Public Library.

University of Toledo Library.

Van Wert: Brumback Library of Van Wert County.

Youngstown: Youngstown Public Library.

Wooster: College of Wooster, Andrews Library.

OKLAHOMA

Ada: East Central State Teachers College Library.

Alva: Northwestern State Teachers College Library.

Bartlesville: Dept. of Interior, Region IV, Bur. of

Mines Library.

Durant: Southeastern State College Library.

Edmond: Central State College, Max Chambers

Library.

Enid: Public Library of Enid and Garfield Library.

Langston: Langston Universinty Library.

210
Norman: University of Oklahoma Library.

Oklahoma City:

Oklahoma City University Library.

Oklahoma State Library—REGIONAL.

Shawnee: Oklahoma Baptist University Library.

Stillwater: Oklahoma State University Library.

Tahlequah: Northeastern State Teachers College

Library.

Tulsa:

Tulsa City-County Library Commission.

University of Tulsa Library.

Weatherford : Southwestern State College Library.

OREGON

Ashland: Southern Oregon College of Education

Library.

Corvallis: Oregon State University Library.

Eugene: University of Oregon Library.

Forest Grove: Pacific University Library.

La Grande: Eastern Oregon College Library.

McMinnville: Linfield College, Northrup Library.

Portland:

Dept. of Interior, Bonneville Power Admin.

Library.

Library Association of Portland.

Portland State College Library.

Reed College Library.

Salem: Oregon State Library.

PENNSYLVANIA

Allentown: Muhlenberg College Library.

Bethlehem: Lehigh University Library.

Bradford: Carnegie Public Library.

Carlisle: Dickenson College Library.

Collegeville: Ursinus College Library.

East Stroudsburg: East Stroudsburg State College.

Erie: Erie Public Library.

Greenville: Thiel College, Langenheim Memorial

Library.

Harrisburg: Pennsylvania State Library.

Haverford: Haverford College Library.

Hazleton: Hazleton Public Library.

Huntingdon: Juniata College Library.

Johnstown: Cambria Public Library.

Indiana: Indiana State College Library.

Lancaster: Franklin and Marshall College, Fackenthal

Library.

Lewisburg: Bucknell University Library.

Meadville: Allegheny College Library.

Millersville: Millersville State College Library.

New Castle: New Castle Free Public Library.

Philadelphia:

Drexel Institute of Technology Library.

Free Library of Philadelphia.

Temple University, Sullivan Memorial Library.

University of Pennsylvania Library.

Pittsburgh:

Allegheny Regional Branch Library.

Carnegie Library of Pittsburgh.

Dept. of Interior, Region V, Bur. of Mines Library.

University of Pittsburgh Library.

Reading: Reading Public Library.

Scranton: Scranton Public Library.

Slippery Rock: Slippery Rock State College Library.

Swarthmore: Swarthmore College Library.

University Park: Pennsylvania State University

Library.

Villanova: Villanova University Law Library.

Warren: Warren Library Association.

Washington: Memorial Library of Washington and

Jefferson College.

Waynesburg: Waynesburg College Library.

Wilkes-Barre: Kings College Library.

Williamsport: James V. Brown Library.

York: York Junior College Library.

PUERTO RICO

Mayaguez: University of Puerto Rico, College of Agriculture and Mechanical Arts Library.

Rio Piedras: University of Puerto Rico General

Library.

RHODE ISLAND

Kingston: University of Rhode Island Library.

Newport: Naval War College Libraries.

Providence:

Brown University Library.

Providence Public Library.

Rhode Island College Library.

Rhode Island State Library.

Westerly: Westerly Public Library.

SOUTH CAROLINA

Charleston:

Charleston College Library.

The Citadel Library.

Clemson: Clemson College Library.

Columbia:

South Carolina State Library.

University of South Carolina Library.

Greenville:

Furman University Library.

Greenville County Library.

Orangeburg: South Carolina State College Library.

Rock Hill: Carnegie Library of Winthrop College.

SOUTH DAKOTA

Aberdeen: Northern State Teachers College Library.

Brookings: South Dakota State University, Lincoln

Memorial Library.

Pierre: South Dakota State Library Commission.

Rapid City:

Rapid City Public Library.

South Dakota School of Mines & Tech. Library.

Sioux Falls: Carnegie Free Public Library.

Spearfish: Black Hills Teachers College Library.

Vermillion: University of South Dakota Library.

Yankton: Yankton College Library.

TENNESSEE

Chattanooga: Chattanooga Public Library.

Clarksville: Austin Peay State College Library.

Columbia: Maury County Public Library.

Jefferson City: Carson-Newman College, Maples

Library.

Johnson City: East Tennessee State University

Library.

Knoxville: University of Tennessee Library.

Martin: University of Tennessee Library—Martin

Branch.

Memphis:

Cossitt Reference Library.

Memphis State University Library.

Murfreesboro: Middle Tennessee State College Library.

Nashville:

Fisk University Library.

Joint University Libraries.

Nashville Public Library.

State Library Division, Tennessee State Library

and Archives.

Sewanee: University of the South Library.

TEXAS

Abilene: Hardin Simmons University Library.

Arlington: Arlington State College library.

Austin:

Texas State Library—REGIONAL.

University of Texas, Law Library.

University of Texas Library.

Beaumont: Lamar State College of Technology Library.

Brownwood: Howard Payne College, Walker Memorial

Library.

Canyon: West Texas State University Library.

College Station: Texas A & M University Library.

Commerce: East Texas State College Library.

Corsicana: Navarro Junior College Library.

Dallas:

Bishop College, Zale Library.

211
Dallas Public Library.

Southern Methodist University Library.

Denton: North Texas State University Library.

Edinburg: Pan American College Library.

El Paso:

El Paso Public Library.

University of Texas, Western College Library.

Fort Worth:

Fort Worth Public Library.

Texas Christian University Library.

Galveston: Rosenberg Library.

Houston:

Houston Public Library.

University of Houston Library.

Huntsville: Sam Houston State Teachers College,

Estill Library.

Kingsville: Texas College of Arts and Industries

Library.

Longview: Nicholson Memorial Library.

Lubbock: Texas Technological College Library—REGIONAL.

Marshall: Wiley College, Carnegie Library.

Nacogdoches: Stephen F. Austin State College Library.

Plainview: Wayland Baptist College, Van Howeling

Memorial Library.

San Angelo: San Angelo College Library.

San Antonio:

Public Library, Business and Science Department.

St. Mary's University Library.

Trinity University Library.

San Marcos: Southwest Texas State College Library.

Sherman: Austin College, Arthur Hopkins Library.

Texarkana: Texarkana College Library.

Waco: Baylor University Library.

Wichita Falls: Midwestern University Library.

UTAH

Cedar City: College of Southern Utah Library.

Ephraim: Snow College Library.

Logan: Utah State University of Agriculture and Applied Science Library—REGIONAL.

Ogden: Weber College Library.

Provo: Brigham Young University Library.

Salt Lake City:

University of Utah Library.

Utah State Library.

VERMONT

Burlington: University of Vermont Library.

Johnson: Johnson Teachers College Library.

Middlebury: Middlebury College, Egbert Starr Library.

Montpelier: Vermont State Library.

Northfield: Norwich University Library.

Putney: Windham College, Dorothy Culbertson Marvin

Library.

VIRGINIA

Blacksburg: Virginia Polytechnic Institute Library.

Bridgewater: Bridgewater College Library.

Charlottesville: University of Virginia Law Library.

Emory: Emory and Henry College Library.

Fairfax: George Mason College of the University of

Virginia Library.

Fredericksburg: Mary Washington College Library.

Hampden Sidney: Hampden Sydney College Library.

Lexington:

Virginia Military Institute Library.

Washington and Lee University Library.

Norfolk:

Armed Forces Staff College Library.

Norfolk Public Library.

Old Dominion College, Hughes Library.

Petersburg: Virginia State College Library.

Richmond: Virginia State Library.

Roanoke: Roanoke Public Library.

Salem: Roanoke College, Bittle Memorial Library.

University: University of Virginia Library.

Univ. of Richmond, P.O.: University of Richmond

Library.

Williamsburg: William and Mary College Library.

WASHINGTON

Bellingham: Western Washington State College

Library.

Cheney: Eastern Washington State College Library.

EUensburg: Central Washington State College Library.

Everett: Everett Public Library.

Olympia: Washington State Library—REGIONAL.

Port Angeles: Port Angeles Public Library.

Pullman: Washington State University Library.

Seattle

Seattle Public Library.

University of Washington Library.

Spokane: Spokane Public Library.

Tacoma:

University of Puget Sound Library.

Tacoma Public Library.

Vancouver: Fort Vancouver Regional Library.

Walla Walla: Whitman College Library.

WEST VIRGINIA

Athens: Concord College Library.

Charleston:

Department of Archives and History, State

Library.

Kanawha County Public Library.

Elkins: Davis and Elkins College Library.

Fairmont: Fairmont State College Library.

Glenville: Glenville State College Library.

Huntington: Marshall University Library.

Institute: West Virginia State College Library.

Morgantown: West Virginia University Library

REGIONAL.

Salem: Salem College Library.

Weirton: Mary H. Weir Public Library.

WISCONSIN

Appleton: Lawrence College Library.

Beloit: Beloit College Libraries.

Eau Claire: Wisconsin State College, William D. McIntyre Library.

Fond du Lac: Fond du Lac Public Library.

La Crosse:

Public Library.

Wisconsin State University Library.

Madison:

Madison Public Library.

State Historical Society Library—REGIONAL.*

University of Wisconsn Library.

Wisconsin State Library.

Milwaukee:

Milwaukee County Law Library—REGIONAL.

Mount Mary College Library.

Oklahoma Library.

University of Wisconsin—Milwaukee Library.

Oshkosh: Oshkosh State College Library.

Platteville: Wisconsin State College and Institute of

Technology Karrmann Library.

Racine: Racine Public Library.

River Falls: Wisconsin State University, Chalmer

Davee Library.

Stevens Point: Wisconsin State College Library.

Superior:

Superior Public Library.

Wisconsin State College, Curran Library.

Whitewater: Wisconsin State College, Harold Andersen Library.

WYOMING

Casper: Natrona County Public Library.

Cheyenne: Wyoming State Library.

Laramie: University of Wyoming Library.

Sheridan: Sheridan College, Mary Brown Kooi Library.

* In cooperation with University of Wisconsin at Madison.

212
APPENDIX B. LIST OF FIELD OFFICES OF THE U.S. DEPARTMENT OF COMMERCE

ALBUQUERQUE, N. MEX. 87101

U.S. Courthouse

William E. Dwyer, Director

Area Code 505 Tel. 247-0311

ANCHORAGE, ALASKA 99501

306 Loussac-Sogn Building

Maurice H. Oaksmith, Director

Area Code 907 Tel. 272-6331

ATLANTA, GEORGIA 30303

4th Floor, Home Savings Building

75 Forsyth Street, N.W.

Daniel M. Paul, Director

Area Code 404 Tel. 526-6000

BALTIMORE, MARYLAND 21202

305 U.S. Customhouse

Gay and Lombard Streets

Carroll F. Hopkins, Director

Area Code 301-692-3560

BIRMINGHAM, ALA. 35205

Suite 200-201

908 South 20th Street

Gayle C. Shelton, Jr., Director

Area Code 205 Tel. 325-3327

BOSTON, MASS. 02203

Room 510, John F. Kennedy

Federal Building

Paul G. Carney, Director

Area Code 617 Tel. 223-2312

BUFFALO, N. Y. 14203

504 Federal Building

117 Ellicott Street

Robert F. Magee, Director

Area Code 716 Tel. 832-3208

CHARLESTON, S. C. 29403

Federal Building, Suite 631

334 Meeting Street

Paul Quattlebaum, Jr., Director

Area Code 803 Tel. 577-4171

CHARLESTON, W. VA. 25301

3002 New Federal Office Building

500 Quarrier Street

J. Raymond DePaulo, Director

Area Code 304 Tel. 343-6196

CHEYENNE, WYO. 82001

6022 Federal Building

2120 Capitol Avenue

Joseph D. Davis, Director

Area Code 307 Tel. 634-5920

CHICAGO, 111. 60604

1486 New Federal Building

219 South Dearborn Street

Anthony J. Buchar, Director

Area Code 312 Tel. 353-4400

CINCINNATI, OHIO 45202

8028 Federal Office Building

550 Main Street

Thomas E. Ferguson, Director

Area Code 513 Tel. 684-2944

CLEVELAND, OHIO 44114

Room 600

666 Euclid Avenue

Charles B. Stebbins, Director

Area Code 216 Tel. 522-4750

DALLAS, TEX. 75202

Room, 1200, 1114 Commerce Street

Harry C. Meyers, Director

Area Code 214 Tel. 749-3287

DENVER, COLO. 80202

16419 Federal Building

20th and Stout Streets

Charles E. Brokaw, Director

Area Code 303 Tel. 297-3246

DES MOINES, IOWA 50309

609 Federal Building

210 Walnut Street

Raymond E. Eveland, Director

Area Code 515 TeL 284-4222

DETROIT, MICHIGAN 48226

445 Federal Building

Frank A. Alter, Director

Area Code 313 Tel. 226-6088

GREENSBORO, N. C. 27402

258 Federal Building

West Market Street, P.O. Box 1950

Joel B. New, Director

Area Code 919 Tel. 275-9111

HARTFORD, CONN. 06103

18 Asylum Street

James E. Kelley, Director

Area Code 203 Tel. 244-3530

HONOLULU, HAWAII 96813

286 Alexander Young Building

1015 Bishop Street

H. Tucker Gratz, Director

Tel. 588-977

HOUSTON, TEX. 77002

5102 Federal Building

515 Rusk Avenue

Edward T. Fecteau, Jr., Director

Area Code 713 Tel. 228-0611

JACKSONVILLE, FLA. 32202

Post Office Box 35087

400 West Bay Street

Wm. Bruce Curry, Director

Area Code 904 Tel. 791-2796

KANSAS CITY, MO. 64106

Room 2011, 911 Walnut Street

Nathan L. Stein, Director

Area Code 816 Tel. 374-3141

LOS ANGELES, CALIF. 90015

Room 450, Western Pacific Bldg.

1031 South Broadway

Stanley K. Crook, Director

Area Code 213 Tel. 688-2833

MEMPHIS, TENN. 38103

Room 710

147 Jefferson Avenue

John M. Fowler, Director

Area Code 901 Tel. 534-3214

MIAMI, FLA. 33130

Room 821

City National Bank Building

25 West Flagler Street

Roger J. LaRoche, Director

Area Code 305 Tel. 350-5267

MILWAUKEE, WIS. 53203

Straus Building

238 West Wisconsin Avenue

David F. Howe, Director

Area Code 414 Tel. 272-8600

MINNEAPOLIS, MINN. 55401

306 Federal Building

110 South Fourth Street

Ernest G. Booth, Director

Area Code 612 Tel. 334-2133

NEW ORLEANS, LA. 70130

909 Federal Office Building, South

610 South Street

Edwin A. Leland, Jr., Director

Area Code 504 Tel. 527-6546

NEW YORK, N. Y. 10007

41st Floor, Federal Office Building

26 Federal Plaza, Foley Square

Arthur C. Rutzen, Director

Area Code 212 Tel. 264-0634

PHILDELPHIA, PENN. 19107

Jefferson Building

1015 Chestnut Street

David Jamieson, Director

Area Code 215 Tel. 597-2850

PHOENIX, ARIZ. 85025

5413 New Federal Building

230 North First Avenue

Donald W. Fry, Director

Area Code 602 Tel. 261-3285

PITTSBURGH, PENN. 15222

2201 Federal Building

1000 Liberty Avenue

Lewis E. Conman, Director

Area Code 412 Tel. 644-2850

PORTLAND, ORE. 97204

217 Old U.S. Courthouse

520 S. W. Morrison Street

James W. Goodsell, Director

Area Code 503 Tel. 226-3361

RENO, NEV. 89502

2028 Federal Building

300 Booth Street

Jack M. Howell, Director

Area Code 702 Tel. 784-5203

RICHMOND, VA. 23240

2105 Federal Building

400 North 8th Street

William S. Parker, Director

Area Code 703 Tel. 649-3611

ST. LOUIS, MO. 63103

2511 Federal Building

1520 Market Street

Alfred L. Rascher, Jr., Director

Area Code 314 Tel. 622-4243

SALT LAKE CITY, UTAH 84111

3235 Federal Building

125 South State Street

Stephen P. Smoot, Director

Area Code 801 TeL 524-5116

SAN FRANCISCO, CALIF. 94102

Federal Building, Box 36013

450 Golden Gate Avenue

Philip M. Creighton, Director

Area Code 415 Tel. 556-5864

SAN JUAN, PUERTO RICO 00902

Room 100, Post Office Building

George R. Delgado

Trade Specialist in Charge

Phone: 723-4640

SAVANNAH, GA. 31402

235 U.S. Courthouse and

Post Office Building

125-29 Bull Street

James W. Mclntire, Director

Area Code 912 Tel. 232-4321

SEATTLE, WASH. 98104

809 Federal Office Building

909 First Avenue

William H. Flood, Director

Area Code 206 Tel. 583-5615

213 U.S. GOVERNMENT PRINTING OFFICE : 1969 OL —313-589

Announcement of New Publications

of the

National Bureau of Standards

Superintendent of Documents,

Government Printing Office,

Washington, D. C. 20402

Dear Sir:

Please add my name to the announcement list of new publications

to be issued by the National Bureau of Standards.

Name

Company

Address

City State Zip Code

(Notification Key N239)
I