A-3Sr'ISrUA.L REPORT

OF THE

DIRECTOR

OF THE

NATIONAL BUREAU OF STANDARDS

FOR THE

FISCAL TEAR ENDED JUNE 30, 1903

WASHINGTON

GOVERNMENT PRINTING

1903

OFFICE

ANNUAL EEPOET

OF THE

DIRECTOR

OF THE

NATIONAL BUREAU OF STANDARDS

FOR THE

FISCAL YEAR ENDED JUNE 30, 1903

WASHINGTON

GOVERNMENT PRINTING OFFICE

1 9 03
Treasury Departm ent,

Document No. 2328.

National Bureau of Standards.
ANNUAL REPORT OF THE DIRECTOR OF THE NATIONAL

BUREAU OF STANDARDS.

Treasury Department,

National Bureau of Standards,

Washington, I). C, June SO, 1903.

Sir: I have the honor to submit the following report of the operations

of this Bureau for the fiscal year ended June 30, 1903. Under the act

of February 14, 1903, this Bureau will be transferred July 1, 1903, to the

Department of Commerce and Labor.

During the past fiscal year the work of the Bureau has been continued

in temporary quarters pending the completion of the laboratory buildings

now in process of construction. In addition to the fifteen rooms in the

Butler and Coast Survey buildings occupied last year, the Bureau has also

occupied during the year the residence at No. 235 New Jersey avenue SE.

as a temporary laboratory.

The office and library of the Bureau, and laboratory rooms used for

the work in connection with the testing of weights and measures, mercurial

thermometry, photometry, and direct current electrical testing are in the

Butler and Coast Survey buildings. The house at 235 New Jersey avenue

has afforded accommodations for the instrument shop, dynamo, and storagebattery rooms, the laboratory rooms for beginning the work in alternating

current measurements and in pyrometry. One of the new buildings (the

mechanical laboratory) will be completed in September, and the installation

of boilers, pumps, and steam piping is under way.

The planning of that portion of the mechanical and electrical equipment

of the new laboratories not provided by the office of the Superv ising Architect in connection with the building has been done during the year, and a

part of this equipment has been ordered, including a tandem compound

engine of 120-horsepower and two direct current dynamos to be directly

connected to the engine (these will supply current for lighting, pow er, and

experimental purposes during the next year); a second unit of equal size will

be installed later; two storage batteries, each of 132 cells, and having a

3
4 ANNUAL REPORT OF THE DIRECTOR OF

capacity of 200 and 400 ampere hours, respectively, a double booster for

charging the same; also three low voltage storage batteries for giving heavy

current for Special testing; four special alternating current testing sets, each

consisting o| either one or two alternators directly connected to a driving

motor, for uSe in alternating current measurements and testing; an ammonia

refrigerating machine of 30 tons capacity, for use in controlling laboratory

temperaturen, and a small ice-making plant which will furnish pure ice for

experimenta

switchboard

purposes. Specifications have also been prepared for the main

of the engine room, for a gas plant, and for the automatic temperature-regulating s}"stem for the laboratories, and contracts therefor will

shortly be awarded.

the coming summer the engine, dynamos, switch board,

storage batteries, refrigerating machine, gas machine, equipment of the

instrument shop, and other machinery will be installed simultaneousl}"

with the pluimbing, electric wiring, heating and ventilating apparatus, etc.,

in order that the building may be ready for occupancy early in the

autumn. Tlie experimental work to be done in this building will include

the testing bf direct and alternating current instruments, heavy current

and high potential work; general photometric work, including the testing

of arc and incandescent lamps; also the development of the testing of

engineering instruments.

The physical laboratory, which was begun in March, will be completed during the coming year, hence the offices of the Bureau and the

greater portion of the work now carried on in temporary quarters will

necessarily lj>e continued there for another year. The preliminary work

the most important lines of work has been taken up in the

temporary quarters, in order that the work of testing may begin promptly

upon the completion of the new laboratory. In some cases this prelimpi well advanced and considerable testing has already been

be seen by reference to the tabulated statement at the end

. The demands made upon the Bureau, however, have been

of its ability to meet them. Some of the original investigainary work

done, as will

of this repor

far in excess

tions necessary in order that the Bureau may properly perform its functions

have been undertaken, but in general this work will of necessity be deferred

until tiie completion of the physieal laboratory.
THE NATIONAL BUREAU OF STANDARDS. 5

The Bureau has frequently been called upon by manufacturers and

scientists for information concerning- standards, methods of measurement, and

physical constants. It has endeavored in all cases to supply this information, and in many respects this is equally important with the comparison of

standards or the testing of measuring- instruments.

Numerous requests have been received from the manufacturers of scientific apparatus for the comparison of their standards with those adopted by

the Bureau, for information concerning methods of construction and measurement, and for the testing- of instruments of precision. Every effort has

been made to encourag-e and assist the manufacturers of such apparatus.

PERSOjSTNEE.

The limited number of positions provided for by the act establishing

the Bureau was only sufficient to begin the solution of the problems enumerated above. The list has been as follows, including the additional positions

made available July 1, 1902:

The Director.

Scientific Division.—One physicist, two assistant physicists, five laboratory assistants, and two laborers.

Engineering Division.—One engineer, one assistant engineer, two mechanicians, one skilled laborer, and one watchman.

Office Division.—Secretary, two clerks, one storekeeper, one messenger,

and one laborer.

WEIGHTS AND MEASURES.

The large number of requests made upon the Bureau lor tests and

comparisons in connection with weights, standards of length and capacity,

lias left little time for the organization of new work in this field or for any

extensive investigations. A detailed statement of the testing done in this

section will be found in connection with the record of tests at the end of

this report.

The verification of standard bars and gauges for manufacturers of highgrade machinery and measuring tools has been taken up to a limited extent

during the year. It will be possible to devote more time and attention to

this most important work during the coming year, with the increased force,

and equipment at the disposal of the Bureau. In the case of the shorter
6 ANNUAL REPORT OF THE DIRECTOR OF

gauges submitted, the work has been done on a small Zeiss comparator, the

scale of which has been carefully investigated and compared with two

standard decimeter scales furnished by the International Bureau of Weights

and Measures. This scale was also investigated at the PhysikalischTeclmische lleichsanstalt. The three results are in accord and left no doubt

as to the value of the scale. The larger gauges were directty referred to

the national prototype meter. The method of calibrating- the subdivisions

of the bars was that developed by Hansen and used at the International

weights and

purpose of t

Bureau of ^eights and Measures.

A bench standard for testing steel tapes was designed for the use of the

sealer of weights and measures of the State of Massachusetts. The same

plan will also be furnished to one of the leading tape manufacturers and

will be used to establish a 100-foot standard in the new Government

building at Chicago, 111. These plans will also be followed in the construction of the bench standard to be installed in connection with the

laboratories of the Bureau.

Considerable progress has been made in designing a set of model

measures for the use of city and State inspectors. It is the

le Bureau to furnish such model sets or drawings of such sets

to manufacturers, in order that inspectors and others desiring standards of

the highest utility may be enabled to secure them. Many of the different

States have laws which call for the periodic inspection of the commercial

measures used within their boundaries, but owing largely to

of the proper officer to secure the necessary standards and

ided to fulfill their duties, the la ws are in most cases inoperative.

In no other way can the Bureau do a greater service to the public than by

assisting inspectors to secure the proper appliances for performing their

duties and in drawing up regulations for their guidance and use. Many requests have been received for information concerning weights

and measures and the laws and practices concerning them in the United

States, in our insular possessions, and in foreign countries. In many cases

the complying with such requests involved much time and labor searching

for information, which must in all cases be exact, since any information of

weights and

the inability

apparatus ne<

this character is regarded as authoritative when supplied by the Bureau.
THE NATIONAL BUREAU OF STANDARDS. 7

The organization of the work of testing chemical glassware has

progressed as rapidly as could be expected. A number of bulb burettes for

use in this work were constructed by the Whitall Tatum & Co., of Millville,

N. J., together with a number of flasks which will be used in standardizing

the burettes referred to. Some experiments were made to determine the

accuracy with which such apparatus could be used, and upon this

experience in connection with the regulation of the German weights and

measures office for doing similar work, were based tentative regulations

which were submitted to the American Chemical Society for criticism and

advice. It is further proposed to submit the regulations to manufacturers

of chemical glassware so that the Bureau will be informed as to the

requirements of both makers and users of such apparatus.

The Bureau has acquired a complete set of Jena glass hydrometers capable of measuring density of from 0.6 to 2.0, and the first and most important requirement for improving the. subject of density determination is thus

secured. This question, which was referred to in the last annual report, is

of the greatest importance to the customs and internal-revenue services, as

well as to distillers, brewers, and manufacturers of chemicals, etc. The laws relating to weights and measures in the several States and in

our insular possessions were compiled during the latter part of the past year.

This compilation has proven to be of great assistance in answering the

many questions concerning the practice in regard to weights and measures

in this country. They clearly show the necessity for more uniform State

laws, or better still, the passage by Congress of acts that will make the

practice in regard to weights and measures uniform throughout the country.

A number of valuable pieces of apparatus were acquired during the

year, among which may be mentioned a dividing machine for graduating

scales, and another for circles. Both of the machines were purchased from

the Socicte Genevoise, Switzerland. The Bureau has also acquired by

purchase from the same firm a nickel steel scale 1 meter in length, subdivided in millimeters. The value of the scale lies in exceedingly small

coefficient of expansion of the material. The steel from which it is made

contains about 36 per cent, nickel, and the coefficient of expansion is less

than one-tenth that of ordinary steel.
8 ANNUAL REPORT OF THE DIRECTOR OP

year has bee

when possib

The following" is a brief summary of the comparisons of mass, length

and capacity the Bureau is prepared to undertake at present:

Standard bars up to 10 feet or 5 meters, leveling rods, finely graduated

scales, metal; tapes up to 300 feet or 100 meters, limit gauges.

Weights from 0.01 grain to 50 pounds, or from 0.1 milligram to 20

kilograms.

Capacity measures from 1 fluid ounce to 10 gallons, or from 1 cubic

centimeter t<| 40 liters.

Hydrometers with scales corresponding to densities from 0.60 to 2.00.

THERMOMETRY A3STD PYROMBTRY.

The w( rk in the field of temperature measurement during the past

:ii chiefly directed toward the design, construction, and purchase

e, of such apparatus as will enable the Bureau to test all kinds

of temperature-measuring apparatus.

For scientific work requiring the highest attainable accuracy in the

measurement of temperatures in the interval 0° to 100°, this Bureau is now

in the possession of five Baudin thermometers of the highest perfection of

workmanship, and eight Tonnelot thermometers, all of which have been

carefully studied at the International Bureau of Weights and Measures, and

thus serve to define the connection of the temperature scale used b}' this

Bureau with the international scale of temperature of the hydrogen gas

thermometer. The Bureau has further prepared specifications and is now

having constructed by Richter, of Berlin, a number of primary standard

mercurial thermometers that are to be carefully studied at and compared

with the standards of the Physikalisch-Teclmische Reichsanstalt. These

various standards will, in the near future, be carefully intercompared here,

thus firmly establishing the relation between the scales of temperature now

used in scientific work and throwing further light on the accuracy attainable

in mercurial thermometry.

The comparison tank for the intercomparison and certification of merI curial thermometers in the interval 0° to 100°, which the Bureau is now

prepared to do, has recently been completed in the instrument shop. This

comparator, which provides for the comparison of thermometers in both a

vertical and horizontal position, is designed to embody every facility for the

rapid and accurate intercomparison of mercurial thermometers.
THE NATIONAL BUREAU OF STANDARDS. 9

The organization of the work of testing clinical thermometers has

advanced as rapidly as possible. A large number of these thermometers of

different manufacture were tested to determine the accuracy of their readings, the time taken by the thermometer to assure the temperature of the

bath, the reliability of the index, and many other points. The first tests

made showed conclusively that many of these clinical thermometers read

too high and were undoubtedly graduated according to erroneous standards.

The manufacturers were notified of this fact and advised to send their

standards to the Bureau for verification. This suggestion was adopted by

all the more important manufacturers, with the result that the clinical thermometers recently submitted for test show a marked improvement in the

magnitude of the errors. The alacrity with which the manufacturers availed

themselves of the services of the Bureau in this respect and the subsequent

interest manifested by them in regard to the progress of the work is conclusive evidence of their desire to make their thermometers accurate.

For temperatures in the interval — 30° C. to 0° C. the Bureau has

several primary standard mercurial thermometers that have been studied at

the International Bureau and several secondary standard toluene thermometers. A special comparison tank for work in this interval has been designed,

and as soon as it can be completed in the shop the Bureau will be prepared

to certify thermometers in this interval. The preliminary steps have been

taken toward the extension of the scale of temperature down to that of

liquid air. For this work the Bureau is now having constructed pentane

and petroleum-ether thermometers, and is in the possession of a number of

copper constantan thermo-couples and platinum thermometers.

Specifications have been prepared and primary standard mercurial

thermometers are now being constructed by Niehle, of Berlin, and by

Baudin, of Paris, for work in the interval 100° to 550°. These thermometers

are being carefully studied at the Reichsanstalt and at the International

Bureau, and when received will be carefully intercompared with the platinum resistance thermometers, which for the present define the gas scale of

temperature to be used by this Bureau.

The specially designed platinum resistance thermometers have been

constructed by the Cambridge Scientific Instrument Company, and have

5043—03 2
10 ANNUAL REPORT OF THE DIRECTOR OF

just been received by this Bureau. A special Wheatstone bridge resistance

box has beei(i designed for use with these platinum thermometers and is

now nearly completed. This box is designed to insure the highest

accuracy and) great rapidity of measurement. , The comparison baths for work in the interval 100° to 550° are now

being designed and the necessary parts assembled, so that the Bureau will

be in a position in the course of several months to certify thermometers up

to 550° C.

For the testing of pyrometers in the interval 500° to 1,500° C. much of

the necessary) apparatus is now in hand. As standards the Bureau is in the

possession of several platinum and platinum-rhodium thermo-couples, which

have been compared with the standards of the Reichsanstalt, in addition to a

number of thermo-couples from other sources, and as soon as these have

been recalibrated and intercompared the Bureau will be in a position to certify pyrometers for the public. The platinum thermometers will also serve

as standards up to 1,000° C. For the testing of pyrometers the Bureau has

available several small gas furnaces, several electric furnaces with necessary

regulating rheostats, two radiation pyrometers with an electrically heated

"black body" for the calibration of radiation pyrometers, a specially designed

potentiometer; suitable for thermoelectric work, a Callendar recording pyrometer, etc. The installation of this apparatus and the equipment of the

laboratory with the necessary facilities, circuits, switch boards, etc., is now

under way.

Much of the preliminary work in the design of an air thermometer has

been done.

A very thorough digest of the most important work done in the field of

high-temperature measurement from 1830 to the present time has been

prepared.

The Bureau is at present prepared to certify clinical thermometers,

mercurial thermometers in the interval —30° C. (—22° F.) to +100° C

(212° F.), and thermo-couples in the interval 0° to 1,500° C. (2,700° F.).

The necessary comparison baths for the intercomparison of thermometers in the interval 100° to 550° will be completed in the near future.
THE NATIONAL BUREAU OF STANDARDS. 11

ELECTRICAL WORK.

The electrical work of the Bureau during- the past year has been

divided into two parts. The first lias included the construction and verification of resistance standards and standards of electromotive force, the calibration of resistance boxes, Wheatstone bridges, potentiometers and other

resistance apparatus, and the calibration of direct current measuring instruments and resistance standards for current measurement. In addition,

facilities have been provided for the verification of photometric standards.

This work includes the following subjects:

(1) Primary and secondary mercurial standards and resistance standards

of precision; (2) resistance boxes; (3) standards of electromotive force;

(4) ammeter and voltmeter testing, and verification of resistance standards

for current measurement; (5) photometry.

At present all resistance measurements of the Bureau are referred to a

number of 1-ohm manganin standards, reverified from time to time at the

Physikalisch-Technische Reichsanstalt, which are therefore known in terms

of the primary mercurial standards of that institution. The construction of

secondary mercurial standards is now under way. Experience indicates that

such mercurial resistance standards are subject to considerable changes the

first year or two after their construction, hence they will not be of any great

assistance in fixing the standard of reference of the Bureau until the lapse

of some time.

A considerable amount of work has been done in planning for the

construction of the primary mercurial resistance standards. A supply of

Jena glass tubing has been procured and subjected to a preliminary calibration, and a number of tubes of sufficiently uniform caliber and suitable

cross section have been found, so that the final calibration can soon be

undertaken.

The set of resistance standards of the Bureau has now been completed

and consists of ten 1-ohm coils, and four coils of each of the following

denominations: 10, 100, 1,000, 10,000, 100,000, 0.1, 0.01, 0.001, and 0.0001

ohms, together with two 2-ohm, three 3-ohm, two 5-ohm coils and two

megohm boxes, so that there are on hand in most cases two reference
12 ANNUAL REPORT OF THE DIRECTOR OF

standards arid two working- standards of the same denomination. Two

0.00001 ohm standards are under construction.

Special importance has been attached to the accurate establishment of

the ratios 1:10, 1:100, etc., upon which the values of the multiples and

submultiples in terms of the unit depend; for the accurate measurement of

resistance and for the establishment of the above ratios, a mercury contact

Wheatstone bridge of the Anthony form was designed, and has just been

delivered. For directly determining the ratio of two coils compared, a

special box of ratio coils and four dial shunt boxes were designed. By

means of the combination the ratio can be read off directly to parts in

1,000,000, the dials reading, respectively, 0.1, 0.01, 0.001, and 0.0001 per

cent. Plans have also been drawn for apparatus based on the same

principle for the rapid calibration of resistance boxes. A special CareyFoster bridge is under construction by the Western Electrical Instrument

Company, based upon designs submitted by the Bureau. During the year

a considerable number of resistance standards have been compared, including

the standards of the leading manufacturers of such apparatus.

The superiority of the Kelvin double-bridge method for the calibration

of resistance

demonstrated

boxes and other resistance apparatus has been thoroughly

and all measurements, wherever possible, are thus made. In

the near future comparisons can be made where necessary in a thermostatic

bath, now under construction, of which the temperature can be accurately

controlled. Investigations will be made upon the change in resistance of

coils due to the heat developed by the test current.

The materials for a new lot of standard cells have been purchased from

a number of leading manufacturers. The cells are to be set up in the

immediate future. The special thermostatic bath referred to will be used

for a redetermination of the ratio of the Clark and Weston standard cells,

and for a redetermination of the temperature coefficients of each type.

Special attention will be given to the preparation of mercurous sulphate

with uniform electro-motive properties, and the purification of the materials

employed. Arrangements have been made with the Weston Electrical

Instrument Company for the loan of a dozen cells of the portable type, to
THE NATIONAL BUREAU OF STANDARDS. 13

be used in determining- the relation between the standard cells of the Bureau

and those of the English and German institutions.

A laboratoiy has been equipped for the calibration of direct current

ammeters, voltmeters, and wattmeters, and the verification of resistance

standards for the measurement of very large currents. The present range

is 600 amperes and 300 volts, but will be considerably extended in the near

future. The resistance standard of lowest value of the Bureau is 0.0001

ohm. Standards of considerably smaller resistance can, however, be

accurately calibrated. The double-bridge method is employed.

A laboratory has been equipped for the verification of photometric

standards. No photometric testing lias, however, been undertaken for the

general public, pending the completion of a comparison of the standards in

use by the manufacturers of incandescent lamps. Facilities for the verification of photometric standards and the investigation of the efficiency of

arc lamps, incandescent lamps, as well as g*as and oil lamps, will be provided as soon as the new laboratory, now nearing completion, is ready for

occupancy. Investigations will also be made to develop a suitable primary

photometric standard.

Facilities are now provided for the verification of resistance standards

of precision and standard cells, the calibration of resistance boxes and

other resistance apparatus, ammeters, voltmeters, wattmeters, watthour

meters, the verification of resistance standards for current measurement, the

determination of the electrical conductivity and the temperature coefficients

of materials.

The second part of the electrical work has included the measurement

of electrical inductances and capacities, and the testing of inductance coils

and condensers, and the preparation for alternating current measurements of

a wider range. For want of laboratory space, apparatus, and men this

work has heretofore progressed slowly, but the increased force and enlarged

facilities of the coming fiscal year will enable the work to be more rapidly

developed.

A considerable quantity of apparatus has been received or ordered

during the past year, and much time has been expended in designing
14 ANNUAL REPORT OF THE DIRECTOR OF

special alternating current generators, transformers, switchboards, and other

machinery and apparatus, some of which has already been built and some

is now building, while still other pieces are soon to be ordered.

The apparatus which has been received or ordered for use in this part

of the electrical work includes a potentiometer, laboratory standard voltmeters, and standard shunts for measuring direct currents and voltages; a Kelvin double bridge, and several Wheatstone bridges, resistance boxes and

rheostats, galvanometers, electrodynamometers, Kelvin balances, electrometers, and standard wattmeters for laboratory measurements of direct and

alternating currents and electromotive forces; standard inductances and

condensers: switchboard instruments of various kinds for direct and alternating currents; Helmholtz pendulum, chronographs, thermographs, barographs, hydrographs, and other recording instruments, together with a considerable Quantity of auxiliary apparatus for experimental investigation.

This apparatus has been purchased from the leading instrument makers of

America and Europe. In addition, some pieces have been constructed in

the instrument shop of this Bureau.

The Bureau is now prepared to measure the capacity of condensers by

various methods, expressing it in terms of the standards of the Bureau, and

to test conqensers for leakage, absorption, and temperature coefficient. The

Bureau is also prepared to measure inductances in terms of its standards, and

will shortlv be prepared to measure both inductances and capacities in

absolute measure.

The calibration of alternating current voltmeters and ammeters will 1 >e begun in the near future, as well as the testing of alternating wattmeters and

watthour meters, frequency indicators, phase indicators, and other alternatingcurrent apparatus.

THE OFFICE AND LIBRAKY.

The work of the office division includes correspondence, the preparation

of certificates, orders, accounts, records, library and archives, supplies,

editorial work, and publications. The correspondence riling system has been

further revised, the subject classification extended, and an improved method

of indexing adopted. Orders for apparatus, supplies, etc., are placed upon

requisitions signed by the chief of each section, and approved by the
THE NATIONAL BUREAU OF STANDARDS. 15

Director, stating the articles required and their number. Orders are issued

in triplicate, copies being retained for the office files and for the officer

making requisition.

The work of the storekeeper includes the receipt and shipment of all

articles ordered or received for testing, the entry at customs-house of all

imported apparatus, the preparation of the inventory records and marking of

apparatus with inventory numbers, and its delivery to the proper section

of the Bureau.

The storekeeper's record consists of a record of the disposition of all

supplies, and a card index of all the apparatus in the Bureau, one card being

arranged serially by the inventory number assigned to the apparatus, and

the duplicate index cards are classified by subjects. The office is also called

upon to furnish stenographers and clerical services required by the scientific

sections of the Bureau.

The library contains about 1,000 volumes. Twenty-six technical

journals are regularly received at the Bureau. Fifty volumes of current

journals were bound and placed in the library during the year. Printed

cards are obtained from the Library of Congress, and a catalogue will be

kept of all the books of that library in technology and physical sciences.

The plans for the library are being considered with the new librarian, whose

duties include the accession and classification of books, preparation of a simple card subject and author catalogues, purchase of the more important

technical works in the various lines of the Bureau's work, and subscription

to additional journals, securing 'sets of scientific reference books for the

laboratories, the preparation of indexes, abstracts, and translations of current

technical literature in subjects directly connected with the work of the

Bureau.

The publications issued during the year include numerous record books

and printed forms and the following documents: Annual Report of the

Director for year ended June 30, 1902 (19 pages), issued February 19,

1903; Circular of Information No. 3, The Verification of Standards and

Standard Measuring Instruments (4 pages), issued June 1, 1903; Circular

of Information No. 4, Tables of Equivalents of the Customary and Metric

Weights and Measures (38 pages).
16

NUMBER J

THE NATIONAL BUREAU OF STANDARDS.

VALUE OF TESTS COMPLETED DUBIXG FISCAL TEAR EJfDED JOE

30, 1903.

Nature of test.

Length

Weight

Capacity

Photometry . Temperature

Electrical

.Sundry

Total.

For Government.

Number.

368

291

294

1 284

13

10

1,261

Value.

$130. 90

345. 00

173. 75

2. 50

220.63

71.00

40. 00

983. 78

For public.

Number.

Ill

109

10

Value.

115

56

4

§133. 55

100. 25

6. 75

40. 19

172. 50

2.10

405 455. 34

Total.

Number.

479

400

304

1

399

69

14

1,666

Value.

§264. 45

445. 25

180. 50

2. 50

260. 82

243. 50

42. 10

1,439. 12

Fees received 1902-3 $488. 99

Fees for tests nat completed during 1902-3 33. 65

1 . for i, mi completed 1902-3 455.34

APPROPRIATIONS, 1901-2, CORRECTED TO JULY 1, 1903.

Ap Dropriations. Disbursements. Liabilities. Balance. Total.

Laboratory

Site

$69, 249. 95

25, 000. 00

21, 959. 76

8, 440. 44

4, 890. 81

$241, 305. 49 $14, 444. 56 $325, 000. 00

25, 000. 00

27, 140. 00

10, 000. 00

5, 000. 00

Salaries, 1902 5,180.24

59. 56

69. 13

Equipment, 19C General expert

Total

2

es, 1902

1, 500. 00

40.06

129, 540. 96 242, 845. 55 19, 753. 49 392, 140. 00

APPROPRIATIONS, 1902-3.

Appropriations. Disbursements. Liabilities. Balance. Total.

Equipment, 19C General experii

Total

fes, 1903

$32, 559. 93

2-1,452. 14

4, 740. 51

$5, 498. 59

189. 07

$3, 500. 07

49. 27

70. 42

$36, 060. 00

30, 000. 00

5, 000. 00

61,752.58 5, 687. 66 3, 619. 76 71,060. 00

Respectfully,

The Secretary of the Treasury.

S. W. Stratton, Director.