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CONTENTS

Page Measurement of Inductance by Anderson's Method, using Alternating Cur

rents and a Vibration Galvanometer . . . E. B. Rosa and F. W. Grover 291 Use of Serpentine in Standards of Inductance . E. B. Rosa and F. W. Grover 337 The Silver Coulometer

K. E. Guthe 349 History of Standard Weights and Measures of United States L. A. Fischer 365 Wattmeter Methods of Measuring Power Expended upon Condensers and Circuits of Low Power Factor

E. B. Rosa 383 The Relative Intensities of Metal and Gas Spectra from Electrically Conducting Gases.

P. G. Nutting 399 The Use of White Walls in a Photometric Laboratory

E. P. Hyde 417 Influence of Wave Form on the Rate of Integrating Induction Wattmeters

. . E. B. Rosa, M. G. Lloyd, and C. E. Reid 421 Detector for small Alternating Currents and Electrical Waves . L. W. Austin 435 The Positive Charges carried by the Canal Rays

L. W. Austin 439 Radiation from Platinum at High Temperatures .

G. K. Burgess 443 A Five-Thousand Volt Generator Set . .

P. G. Nutting 449

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HARVARD COLLEGE LIBRAR Sei 1120.40

DEC 15 1905 CAMBRIDCE, MASS,

که

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