National Bureau of Standards

Library, N.W. Bldg APR 2 0 1965 SDU«^I3| g NBS MISC. PUBL. 260-4

Standard Reference Materials:

SOURCES OF INFORMATION
THE NATIONAL BUREAU OF STANDARDS

The National Bureau of Standards is a principal focal point in the Federal Government for assuring maximum application of the physical and engineering sciences to the advancement of technology in industry and commerce. Its responsibilities include development and maintenance of the national stand- ards of measurement, and the provisions of means for making measurements consistent with those standards; determination of physical constants and properties of materials; development of methods

for testing materials, mechanisms, and structures, and making such tests as may be necessary, particularly for government agencies; cooperation in the establishment of standard practices for incorporation in codes and specifications; advisory service to government agencies on scientific and technical problems; invention and development of devices to serve special needs of the Government; assistance

to industry, business, and consumers in the development and acceptance of commercial standards and

simplified trade practice recommendations; administration of programs in cooperation with United

States business groups and standards organizations for the development of international standards of

practice; and maintenance of a clearinghouse for the collection and dissemination of scientific, technical, and engineering information. The scope of the Bureau's activities is suggested in the following

listing of its four Institutes and their organizational units. Institute for Basic Standards. Electricity. Metrology. Heat. Radiation Physics. Mechanics. Applied Mathematics. Atomic Physics. Physical Chemistry. Laboratory Astrophysics.* Radio Stand- ards Laboratory: Radio Standards Physics; Radio Standards Engineering.** Office of Standard Ref- erence Data. Institute for Materials Research. Analytical Chemistry. Polymers. Metallurgy. Inorganic Materials. Reactor Radiations. Cryogenics.** Office of Standard Reference Materials. Central Radio Propagation Laboratory.** Ionosphere Research and Propagation. Troposphere and Space Telecommunications. Radio Systems. Upper Atmosphere and Space Physics. Institute for Applied Technology. Textiles and Apparel Technology Center. Building Research.

Industrial Equipment. Information Technology. Performance Test Development. Instrumentation. Transport Systems. Office of Technical Services. Office of Weights and Measures. Office of Engineering Standards. Office of Industrial Services.

* NBS Group, Joint Institute for Laboratory Astrophysics at the University of Colorado. ** Located at Boulder, Colorado.
UNITED STATES DEPARTMENT OF COMMERCE • Luther H. Hodges, Secretary NATIONAL BUREAU OF STANDARDS • A. V. Astin, Director

Standard Reference Materials:

Sources of Information

Compiled by John L. Hague, Thomas W. Mears, and Robert E. Michaelis

Institute for Materials Research

National Bureau of Standards Washington, D.C.

National Bureau of Standards Miscellaneous Publication 260-4

Issued February 1965

For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C, 20402 - Price 20 cents
Unnumbered page ii ctr. at bottom as indicated.

Library of Congress Catalog Card Number: 65-60010
PREFACE

Within the framework of the NBS Institute for Materials

Research the area of standard reference materials is a broad

and important one, including the preparation, characterization and distribution of a wide variety of materials in such

diverse fields as metallurgy, polymers and inorganic

materials. In carrying out such a program there is much

interaction with representatives of industry and science,

beginning with discussions as to which primary standard

materials will do most to advance technology, the furnishing

of materials and fabrication of samples, and the characterization and certification of the materials by cooperative

efforts. The many groups participating in a standards

program are very interested in detailed information on specific aspects of the program -- but to date there has been

no publication outlet for such written discussions.

To meet this need, NBS Miscellaneous Publication 260 has

been reserved for a series of papers in the general area of

"standard reference materials" This series will present

the results of studies and investigations undertaken within

the Institute for Materials Research with emphasis on the

preparation and characterization of standard reference

materials. This subject-oriented series will provide a means

for rapid dissemination of this detailed information and we hope will stimulate the use of standard reference materials

in science and industry.

W. Wayne Meinke, Chief

Office of Standard Reference Materials.

iii
CONTENTS

Page

1. INTRODUCTION 1

2. SOURCES OF INFORMATION 3

3. INDEX 16

iv
STANDARD REFERENCE MATERIALS:

SOURCES OF INFORMATION

Compiled by

John L. Hague 3 Thomas ¥. Mears and Robert E. Michaelis

This annotated listing of sources of Standard

Reference Materials is prepared with references to all types of materials used to standardize analytical, physico-chemical and engineering methods.

The range of Standard Reference Materials included

runs from high-purity substances and carefully

analyzed metals, alloys and rocks to materials of

indefinitely-known composition for standardizing

a single phenomenon.

INTRODUCTION

The term "Standard Reference Materials" encompasses a wide spectrum of well-characterized materials which can be

used to calibrate a measurement system or to produce scientific

data that can be referred readily to a common base. These

materials insure uniformity of the nation's measurement

systems

.

Instruments and techniques need to be related to reliable

reference materials if measurements are to be accurate. Analytical laboratories require composition standards in which the

amounts of certain chemical constitutents have been certified.

The apparatus for measurement of physical properties must be

calibrated against similarly certified reference materials.

1
Few standard reference materials of the type described here

have true legal status in the United States. Rather these

standards owe their acceptance to (l) the reputation of the

certifying organization, (2) mutual agreement between buyer

and vendor , and (3) acceptance within a given industry.

Often the availability of required reference materials

is not generally known. This compilation attempts to bring

together current sources of information in this general field

and has been assembled largely from the files of the three

Analytical Standards Coordinators at the National Bureau of

Standards. Emphasis has been placed on breadth of coverage.

Often where one publication refers to a number _of other information sources, only the one broad publication is included.

It is anticipated that this compilation will be revised

from time to time as needed. Information on additional

sources would be appreciated to provide a more complete

coverage. These revisions will be issued as NBS Miscellaneous

Publication 260-4 (Revised).

In preparing this list, it has been necessary to make

xeference to many diverse sources of materials 0 Such mention

should in no case, however, be considered as representing a recommendation or endorsement by the National Bureau of

Standards

.

2
1. Air Products and Chemicals, Inc . Specialty Gas Department

Allentown, Pennsylvania

Lists a series of analyzed-certified mixtures of

gases in range from ppm up to 50$ of the minor

constituent. Also given is information on "ultrapure" gases and blends available on request.

2 . Alloyd Electronics Company

35 Cambridge Parkway

Cambridge 42, Massachusetts

Provides a variety of stainless steel standards

intended primarily for x-ray spectrochemical analysis.

3. Aluminum Company of America

Research Laboratories

New Kensington, Pennsylvania

Supplies a variety of aluminum-base standards.

Some magnesium standards also are available, but the

preparation of these has been discontinued. (Primarily

spectrochemical.

)

4 . Aluminium Laboratories Limited

Analytical Division

P.O. Box 645

Arvida, Quebec, Canada

Supplies a variety of aluminum-base standards.

(Primarily spectrochemical.)

5 . American Instrument Company

Material Evaluation Laboratory

Attn: Mr. H. M. Rootare

8030 Georgia Avenue

Silver Spring, Maryland

Provides surface area standards for measurement by

the BET method.

5
6 . American Petroleum Institute

Petroleum Research Laboratory

Attn: Beveridge J. Mair

Carnegie Institute of Technology

Pittsburgh^ Pennsylvania 15213

"American Petroleum Institute Standard Samples"

Lists API Standard Samples of hydrocarbons , organic

sulfur compounds and organic nitrogen compounds. Also

lists certified reference standards for density.,

refractive index and heat of combustion.

7 . American Society for Testing and Materials

191b Race Street

Philadelphia, Pennsylvania 19103

"Report on Available Standard Samples , Reference

Samples j and High-Purity Materials for Spectrochemical

Analysis (1963)" by R. E. Michaelis. ASTM Special

Technical Publication No. 58-E. Price: $4.50 ($3.15

to members )

.

Provides ready reference by text and tables to the

availability and sources in the world of 2 .,851 standard

samples , 1,200 reference samples , and more than 1,000

high-purity materials. Although prepared primarily

for use In spectrochemical methods of analysis, the

listing provides information of value for application

to any analytical method for metals and alloys , and

inorganic materials.

8 . Apex Smelting Company

Division of American Metal Climax, Inc. 2537 W. Taylor Street

Chicago 12, Illinois

Offers aluminum- and zinc-base standards.

(Primarily spectrochemical.)

9 . Applied Research Laboratories, Inc . Box 1710

Glendale 5 a California

Offers copper-base and ceramic standards. Also

supplies semiquantitative standards for spectrochemical analysis. (Primarily spectrochemical.)

4
10 . Applied Science Laboratories , Inc . State College, Pennsylvania

Offers phosphoglyceride standards and some pure

Toranched-chain fatty acids.

11. Atlas Testing Laboratories, Inc . 1225 East 53rd Street

Los Angeles, California

Provides a limited number of stainless steel

spectrochemical standards.

12. United States Atomic Energy Commission

New Brunswick Laboratory

Attn: C. J. Rodden, Director

P.O. Box 150

New Brunswick, New Jersey

Supplies a number of analyzed uranium ores, counting

standards, uranium, thorium, and beryllium metal,

metal products and oxide for chemical and spectrograph!, c analysis.

13 . Battelle Memorial Institute

Defense Materials Information Center

Columbus, Ohio

"Production and Availability of Some High-Purity

Metals", Memorandum No. 76 (revision in press). Also

available as PB No. 162226 for fifty cents from Office

of Technical Services, U.S. Department of Commerce,

Washington, D.C. 20234.

Lists both methods of preparation and availability

of high-purity metals.

14. The British Drug House, Ltd . B.D.H. Laboratory Chemical Division

Poole, England

(U.S. Distributor: The Ealing Corporation, 2225

Massachusetts Avenue, Cambridge, Massachusetts 02140)

Offers "Organic Analytical Standards" which comply

with the specifications of the Society for Analytical

Chemistry. [See The Analyst 87, 304-316 (1962) ]

5
15 . British Pharmacopoeia Commission

Attn: T. C. Denston, Secretary

General Medical Council Office

44 Hallam Street

London, W.l England

"British Pharmacopoeia Commission's Authentic

Specimens"

Lists reference standards of drugs, steroids,

hormones, etc. The substances available are among

those referred to by the Pharmacopoeia for infrared

identification or limitation of steroids in certain

corticosteroids.

16. Brookfield Engineering Laboratories , Inc . Stoughton 85* Massachusetts

Lists standard viscosity liquids ranging from 10

to 100,000 centipoise.

17. Bundesanstalt fur Materialprufung

Berlin-Dahlem

Unter den Eichen 87

Berlin, Germany

Provides a limited number of high-purity copper

standards for the globular-arc technique of spectrochemical analysis.

18 . Bureau of Analysed Samples, Ltd . Newham Hall

Middlesbrough

Yorkshire, England

"British Chemical Standards and Spectrographic

Standards"

Offers a great variety of chemical and spectrochemical reference standards. Among these are carbon

steels, low-alloy steels, mild steel, low-tungsten

steel, cast iron, iron and steel, ferroalloys,

magnesium-base alloys, lead-base alloys, tin-base

alloys, copper-base alloys, nickel-base alloys, ores, slags, silica brick, fire brick, sillimanite. Benzoic

acid for calorimetric and acidimetric standards, and

pure metals for the calibration of pyrometers also

are available.

6
19. Bureau of Naval Weapons — Materials Advisory Board

Code RRMA-2^ ——

Washington, D.C.

Prepared unalloyed tungsten and one alloy each of

Nb (FS-85), Ta (T-lll), and Mo (TZM) , for round robin

testing by Department of Defense contractors. The

results are expected to be published in appropriate

reports. The materials are listed for information

only and they are not generally available for further

distribution.

20. Calorimetry Conference

Attn: D. D. Wagman

National Bureau of Standards

Washington, D.C. 202^4

Supplies standard n-heptane and alumina for high

and low temperature heat capacity calorimetry.

21 . Canadian Association for Applied Spectroscopy

Copper and Copper Alloy Spectrographic Standards Committee

Mineral Science Division, Mines Branch

Department of Mines and Technical Surveys

555 Booth Street

Ottawa, Ontario, Canada

Offers copper-base standards. (Primarily spectrochemical .

)

22 . Canadian Association for Applied Spectroscopy

Nonmetallic Standards Committee

Attn: G. R. Webber

Department of Geological Sciences

McGill University

Montreal, Quebec, Canada

Offers analyzed samples of sulfide ore and syenite

rock.

23. Centre National de la Recherche Scientifique

Centre de Recherches Petrographiques et Geochimiques

de l'Universite de Nancy

B.P. 682

Nancy, France

Offers analyzed rock standard of alkali-calcium

granite

.

7
24. Dow Chemical Company

Magnesium Sales Department

Midland., Michigan

Supplies a variety of magnesium-base standards.

(Primarily spectrochemical .

)

25 . Eastman Organic Chemicals

Distillation Products Industries

Rochester J> s New York

"Liquids for Refractive Index Determination" s Eastman Information Bulletin I 16863.

Lists materials of known refractive index from

1.269 to 1.835.

26. Eastman Organic Chemicals

Distillation Products Industries

Rochester ~5 , New York

"Eastman Organic Chemicals"

Contains a listing of vitamins and related products

that are considered to be of high purity and are intended solely for use as reference standards and

experimental work where a compound of known purity is

required

.

27 . Electronics and Alloys 3 Inc . 435 Victoria Terrace

Ridgefieldj New Jersey

Provides standards for 17-7 and 17-4 PH stainless

steels. (Primarily spectrochemical.)

28 . En jay Company., Inc . Attn: E. P. Meyer

15 West 55th Street

New York, New York 10020

Supplies primary knock-test isooctane reference

fuel.

8
29. Food and Drug Administration

Division of Antibiotics and Insulin Certification

Bureau of Scientific Standards and Evaluation

330 Independence Avenue, SW

Washington, D.C.

Offers a wide selection of official antibiotic

standards

.

30. United States Geological Survey

Attn: Francis J. Flanagan

Analytical Laboratories

Washington, D.C. 20234

Offers a chemically analyzed rock standard with

several more in preparation.

31. Goldsmith Bros. Smelting and Refining Co . 1300 W. 59th Street

Chicago 36, Illinois

Provides a variety of lead-base spectrochemical

standards

.

32. Hilger and Watts, Ltd . 98 Pancras Way

Camden Road

London, N.W. 1, England

Lists several sets of semiquantitative rod samples

designed primarily for the Spekker Steeloscope.

33 . Hopkins and Williams, Ltd.

Chadwell Heath

Essex, England

Offers "Micro-analytical Standards" which comply

with the specifications of the Society for Analytical

Chemistry [See The Analyst 87, 304-316 (1962)].

3^-. Humphrey-Wllkerson Corporation

201 Devlne Street

North Haven, Connecticut

Supplies primary diesel reference fuels, n-hexadecane

and 2, 2,4,4, 6,8,8-heptamethylnonane

.

9
35. Indium Corporation of America

1076 Lincoln Avenue

P.O. Box 269

Utica 4, New York

Provides a limited number of semiquantitative

reference samples of indium metal. (Primarily

spectrochemical .

)

36 . Institute of Gas Technology

Attn : Mr . Duane Kniebes

Illinois Institute of Technology

Chicago , Illinois

Supplies standard reference heating-value gas

(gas-calorimeter standard).

37 . International Nickel Company

Inco Nickel Alloys Department

Huntington , West Virginia

Offers nickel-base standards. (Primarily spectrochemical . ) 38 . Iowa State University

Ames., Iowa

"High Purity Materials Available from American

Producers" by H. A. Wilhelm and R. E. McCarley. U.S.

Atomic Energy Commission Rept. ISC-1029 (Revised).

Available for $1.00 from Office of Technical Services,

U.S. Department of Commerce , Washington, D.C. 20234.

This bulletin is a compilation of the availability

of high-purity materials. (Primarily inorganic.)

39 • Jarrell-Ash Company

590 Lincoln Street

Waltham, Massachusetts 02154

Provides several standards for spectrographic

analysis of AISI 300 series stainless steels.

40. Johnson, Mat they and Company, Ltd . Hatton Garden

London, England

Offers aluminum-, copper- and lead-base standards.

Also supplies semiquantitative standards for spectrochemical analysis. (Primarily spectrochemical.)

10
41. Laboratorium fur Alterbestimmungen

Miner alogisch-petrographische Institut

Sahlistrasse 6 Bern, Switzerland

Offers two standard minerals (Biotite and Muscovite)

for K-Ar and Rb-Sr age determinations.

42 . The Matheson Company, Inc . P.O. Box »b

East Rutherford, New Jersey

"Compresse^ Gases and Fluid Controls"

Catalogue lists a wide selection of gases and

mixtures of gases.

43. Michigan State College

Attn: A. L. Kenworthy

Horticultural Dept.

East Lansing, Michigan

Provides several standards of tree leaves.

(Primarily for spectrochemical analysis.)

44. Morris P. Kirk and Son, Inc . 2717 South Indiana Street

Los Angeles 23 a California

Supplies aluminum-, zinc-, lead- and tin-base

standards. (Primarily spectrochemical.)

45 . National Bureau of Standards

Washington, D.C. 202^4

"isotope Abundance Ratios Reported for Reference

Standards Stocked by the National Bureau of Standards"

by Fred L. Mohler. NBS Technical Note 51. Available

for fifty cents from Office of Technical Services,

U.S. Department of Commerce, Washington, D.C. 202^4.

Lists stock of reference samples of natural isotopic

abundance maintained at NBS along with results received

on measurements on these samples.

11
National Bureau of Standards

Washington, D.C. 202^4

"Standard Materials Issued by the National Bureau

of Standards". NBS Miscellaneous Publication 24l.

Available for thirty cents from Superintendent of

Documents , U.S. Government Printing Office , Washington,

D.C. 20402.

Lists a wide variety of materials for chemical and

spectroscopic analysis in disc, rod, and powder form.

Metallic standards include iron and steel, white cast

iron, stainless steel, tool steel, high-temperature

alloys, nickel oxide, titanium-base alloys, zirconiumbase alloys, metallo-organic materials, gas-in-metal

standards, radioactivity standards, magnesium-base

alloys, lead-base alloys, cobalt-base alloys, nickelbase alloys, and steel-making alloys. Also listed

are non-metallic materials such as ores, refractories,

cement, clay, glasses, glass sand, phosphate rock,

limestone, titanium oxide, silica brick, burned

magnesite, portland cement, and silicon carbide. A

variety of organic materials are also listed as standard reference substances. These include

analytical standards (liquid-hydrocarbon blends,

metallo-organic, and microchemical) , pH standards,

and temperature standards. Standard materials are also available, certified for acidimetry, calorimetry,

density, oxidation and reduction, refractive index,

saccharimetry and viscosity.

National Formulary Reference Standards

American Pharmaceutical Association

2215 Constitution Avenue, N.W. Washington, D.C. 20007

"National Formulary XI Reference Standards"

Lists a series of standard drugs and pharmaceutical

products

.

12
48. National Institute of Hygienic Sciences

Attn: Dr. Kakuma Nagasawa

Department of Biological Chemistry and Reference Standards

Tamagawayoga-machi Setagaya-ku

Tokyo- to , Japan

Supplies drugs and pharmaceuticals defined as Japanese Pharmaceutical Standards s and National

Institute of Hygienic Sciences Standards. Also lists

series of compounds certified for melting point

standards

.

49. National Spectrographs Laboratories 3 Inc . 6300 Euclid Avenue

Cleveland 3 , Ohio

Offers diesel oil contaminant and metallo-organic

compound standards. Also offers semiquantitative

standards for spectrochemical analysis.

50 . Oak Ridge National Laboratory

Research Materials Information Center

Oak Ridge, Tennessee

"RMIC Bulletin" 3 U.S. Atomic Energy Commission

Rept. ORNL-RMIC-2.

51. Pechiney-Service, D.I./CA-M

23 Rue Balzac

*~" Paris (8°), France

Supplies a variety of aluminum-base standards.

(Primarily spectrochemical.)

52 . Phillips Petroleum Company

Chemical Department

Special Products Division

Bartlesville, Oklahoma

"Phillips Hydrocarbons and Petro-sulfur Compounds"

Lists research grade hydrocarbons as primary

reference standards, liquids for hydrometer standards,

BTU grade methane for calorimeter standard, gaseous

and/or liquid hydrocarbon mixture s, natural gas

standard blends , primary knock-test fuels and flashpoint check standard.

13
Schweizerische Arbeitsgemelnschaft fur Steine und Erden

Attn: Prof. Dr. T. Hugi

~ Mineralogisch-petrographische Ins ti tut

Sahlistrasse 6 Bern, Switzerland

"Liste der Ref erenzproben der Chemischen Abteilung

der Technischen Stelle Holderbank der Bestimmung des

Mineral-bestandes .

Offers a wide variety of rocks and minerals:

feldspars , silicate minerals, amphiboles, pyroxenes,

chlorites and chrysolites, micas, hydrated micas,

candites, smektite, carbonates, hydrated oxide

minerals, calcium silicate and other portland cement

clinker materials, and others.

Smith & Underwood (Thorn Smith, Chemist)

Research Laboratory

1847 North Main Street

Royal Oak, Michigan

Provides a wide variety cf analyzed samples.

(Primarily for student use in universities, colleges

and high schools.)

G. Frederick Smith Chemical Company

P.O. Box 2334^

Columbus 23 , Ohio

Offers analyzed samples of limestone and dolomite

for reference work.

Societe Zinc et Alliages

32 Rue Collange

Lavallois-Perret

Seine, France

Offers a variety of zinc-base standards. (Primarily

spectrochemical.

)

Spex Industries, Inc . 3«»0 Park Avenue

Metuchen, New Jersey

Provides a wide variety of semiquantitative

standards for spectrochemical analysis.

14
58. Trans -Sonic s , Inc . Dept. lb

Burlington, Massacnusetts

Offers water triple-point thermometer cells.

59. U.SpP. Reference Standards

4b Park Avenue ' New York, New York 10016

"U 0 S.P. Reference Standards"

Lists many U.S. P. Reference Standard drugs and

pharmaceuticals and a series of standard melting

point compounds.

60 . World Health Organization

Attn: Mr. P. D. Blanc, Chi e

f

Pharmaceutical Section

WHO Secretariat

Palais des Nations

Geneva, Switzerland

"WHO Centre for Authentic Chemical Substances",

WHO Chemicke 17, 581 (1963)

.

Lists 8 authentic substances (drugs etc.) ana a series of materials for melting point standards.

61. Wieland Werke Ag . Metallwerke

Ulm-Donau

Postfach 656

West Germany

Offers a variety of aluminum- and copper-base

standards. (Primarily spectrochemical.

)

15
INDEX

STANDARD REFERENCE MATERIAL ITEM NO. Acidimetric 18,46

Alloys 2,3,4,7,8,9,11,17,

18,19,20,24,27,31,

32,37,39,^0,44,46,

^9,51,54,56,57,61

Calorimetric 6,18,20,36,46,52

Cement 7^46,54

Ceramic 7 a 9 a 46

Cetane Number 34

Clay 46

Density 6,46,52

Flash Point 52

Gases-in-metals 7,46

Gases, Mixtures 1,42,52

Gases, High-Purity 1,42,52

Glass 46

Hydrocarbons 6,28,34,52

Hydrocarbon Blends 46,52

Isotope, stable 45

Melting Point (capillary) 48,59,60

Metallo-organic Compounds 7,46,49

Metals, High-Purity 7,12,13,18,19,35,

38,50,54

Microanalytical 14,33,46

Octane Number 28,52

16
STANDARD REFERENCE MATERIAL

Ores

Organic Compounds (miscellaneous)

Organic -Nitrogen Compounds

Organic -Sulfur Compounds

Oxidation and Reduction

Oxides

pH

Pharmaceutical

Radioactivity

Refractive Index

Ref ractories

Rocks

Saccharimetry

Slags

Surface Area

Temperature

Thermochemical

Tree-leaf

Viscosity

Vitamin

ITEM NO. 7,12,18,22,41,46,

10,14,33

6646

7,12,40,46,57

18,46

15,26,29,47,48,

59,60

7,46

6,25,46

7,46

7,22,23,30,53,54,

55

46

7,18,54

518,46,58

6,18,46

7,43

16,46

26,48,59

17
OTHER NBS PUBLT CATIONS OF INTEREST

NBS Miscellaneous Publication 260-1, Preparation of NBS White

Cast Iron Spectrochemical Standards, June 1964. 30 cents.

NBS Miscellaneous Publication 260-2, Preparation of NBS

Copper-Base Spectrochemical Standards, October 1964.

35 cents.

NBS Miscellaneous Publication 24l, Standard Materials Issued

by the National Bureau of Standards: A Descriptive List

with Prices, March 1962. 30 cents. * Up-to-date Supplementary Insert Sheets to Misc. Publ. 241 list new, renewal,

out-of -stock, and discontinued standards. These sheets are available without charge directly from the Standard Sample

Clerk, National Bureau of Standards, Washington, D.C. 20234.

NBS Miscellaneous Publication 250, Calibration and Test

Services of the National Bureau of Standards, November 1963.

70 cents.

NBS Monograph 54, Analytical Standards for Trace Elements in

Petroleum Products, October 1962. 25 cents. * NBS Technical Note 5I5 Isotope Abundance Ratios Reported for

Reference Standards stocked by the National Bureau of

Standards, May i960. 50 cents. (Available from Office of

Technical Services, U. S. Department of Commerce,

Washington, D.C. 20234.)

Send orders with remittance to: Superintendent of Documents,

U.S. Government Printing Office, Washington, D.C. 20402.

Remittances from foreign countries should include an additional one-fourth of the purchase price for postage.

18
Announcement of New Publications on Standard Reference Materials

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 in the series: NBS Miscellaneous

Publication 260 - Standard Reference Materials.

Name

Company

Address

City State Zip Code

(Notification key N-330)