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Bureau of Standards.

FIG. 1.-FRONT VIEW OF THE 5,000-VOLT GENERATOR SET.

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2 h. p. General Electric.

Top, 26 by 62 in.
Type, “C. A.” 15 ampere, 115 volts. Space per generator, 8 by 10.5 in.
Speed, 1,800 revolutions

per

minute. Belts: Motor shaft, 3 in.; shaft generaPulley, 3.5 in. face, 4.5 in. diameter. tors, 1 in.

The generator set here described is calculated to make unnecessary the use of batteries of storage cells for all kinds of vacuum tube work, and even for accurate conductivity tests. It is, however, no competitor for the small high potential transformer for use in spectroscopic work with sparks and Plücker tubes.

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INDEX TO VOLUME 1.

A.

Condensers and circuits of low power

factor, Wattmeter methods of
Absolute measurement of capacity, E. B.

measuring power expended upon,
Rosa and F. W. Grover, 153.

E. B. Rosa, 383.
Absolute measurement of inductance, Coulometer, The silver, K. E. Guthe (see

E. B. Rosa and F. W. Grover, 125.
Alternating currents and electrical waves,

also Voltameter), 349.
Detector for small, L. W. Austin,

D.
435.
Analysis of alternating current curves, 138.

Detector for small alternating currents
Anderson's method, Measurement of

and electrical waves, L. W. Austin,

435.
inductance by, using alternating

E.
currents and a vibration galva-
nometer, E. B. Rosa and F. W.

Elastic properties, On fibers resembling
Grover, 291.

quartz in their, K. E. Guthe, 101.
Announcement, 4.

Electrical units, The so-called interna-
Arc, On the temperature of the, C. W. tional, Frank A. Wolff, 39.

Waidner and G. K. Burgess, 109. Electrical waves, Detector for small
Austin, L. W., Detector for small alter-

alternating currents and, L. W.
nating currents and electrical

Austin, 435.
waves, 435.

Electrochemical equivalent of silver, 34.
The positive charges carried by the
canal rays, 439.

F.
B.

Féry pyrometer, 224–238.
Black body, 194.

Fibers resembling quartz in their elastic
Brunner comparator, 11.

properties, K. E. Guthe, 101.
Burgess, G. K., Radiation from platinum Fischer, L. A., Recomparison of the
at high temperatures, 443.

United States prototype meter, 5.
Burgess, G. K., C. W. Waidner and, On the History of standard weights and
temperature of the arc, 109.

measures of United States, 365.
Optical pyrometry, 189.

Fischer, L. A., C. W. Waidner and, The

testing of clinical thermometers,
C.

275.
Canal rays, The positive charges carried

Five-thousand volt generator set, P. G.
by the, L. W'. Austin, 439.

Nutting, 449.
Capacity, The absolute measurement of,

G.
E. B. Rosa and F. W. Grover, 153.
Charges carried by the canal rays, The Galvanometer, vibration, Measurement
positive, L. W. Austin, 439.

inductance by Anderson's
Clinical thermometers, The testing of, method, using alternating currents

C. W. Waidner and L. A. Fischer, and a, E. B. Rosa and F. W.
275.

Grover, 291.

of

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