536 



SUBJECT INDEX 



Physics (Continued) 



fHeat conduction in fins of air-cooled 

 engines. S. R. Parsons and D. R. 

 Harper. 513. 



fHeating of substances by expansion. L. 

 H. Adams. 349. 



fHypsometer as precision instrument. E. 



F. Mueller and T. S. Sligh, Jr. 167. 



t Illumination measurements, daylight, 

 and sky brightness. H. H. Kimball. 

 513. 



flnduction coils, distributed capacity of. 



G. BreiT. 239. 



*Integration method of deriving the alter- 

 nating current resistance and induc- 

 tance of conductors. H. L. Curtis. 

 209. 



flntemational hydrogen scale, comparison 

 of, with standard scale of temperature 

 defined by platinum resistance ther- 

 mometer. R. H. WiLHELM and A. K. 

 Benson. 



Irreversible time effects, theory of. M. D. 



Hersey. 149. 

 fMagnetic reluctivity and eutectoid 



carbon steel. C. Nusbaum. 38. 



fMagnetization by rotation, experiments 



on. S. J. Barnett. 162. 

 *Magnetizing force, variation of residual 



induction and coercive force with. 



R. L. Sanford and W. L. Cheney. 



210. 

 jMagneto, physics of high-tension. F. 



B. Silsbee. 38. 



fMoUier diagrams. E. F. MuELLER and 



C. H. Myers. 347. 

 *Photometers, measurement of intensity 



of transmitted and reflected light by 



polarization. F. E. Wright. 282. 

 fPiezo-electric effect. A. M. NicoLSON. 



473. 

 *Polarization photometer prisms. F. E. 



Wright. 282. 

 *Polarized light in study of ores and 



metals. F. E. Wright. 281. 



fPressures, production and measurement 

 of extremely low. S. Dushman. 21. 



*Radiation, constants of. W. W. Cob- 

 LENTZ. 209. 



*Radiation, thermal, present status of 



constants and verification of laws of. 



W. W. COBLENTZ. 439. 

 Radioactive quantity, name of a (curie 



or rutherford). N. E. Dorsey. 381. 

 fRange finder, self-contained base, and 



its errors. I. C. Gardner. 395. 

 fResistance thermometer construction. 



T. S. Sligh, Jr. 313. 

 fvSky brightness and daylight illumination 



measurements. H. H. Kimball. 513. 

 fSpecific and latent heats of nickel and 



monel metal. W. P. White. 350. 

 fSpectral distribution of energy required 



to evoke gray sensation. I. G. Priest. 



396. 

 Supraconductivity, discontinuity of re- 

 sistance preceding. P. W. Bridgman. 



455. 

 fThermostatics. T. vS. Sligh, Jr. 168. 

 *Ulbricht sphere in measurement of re- 

 flection and transmission factors. E. 



Karrer. 439. 

 §Weights, magnetic. 476. 

 X-rays, characteristic soft, from arcs in 



gases and vapors. F. L. MohlER and 



P. D. FooTE. 273, 513. 

 X-rays, wave lengths of. R. W. G. 



Wyckoff. 366. 

 Phytopathology. fCooperation between en- 

 tomologists and plant pathologists. F. 



K. Ravn. 142. 

 fWhite pine and blister rust. sS. B. 



DetwilER. 119. 

 Radiotelegraphy. Chronographic recorder 



of radio time signals. E- A. Eckhardt 



and J. C. K ARCHER. 303, t348. 

 Radio signal fading phenomena. J. H. 



Bellinger and L. E. Whittemore. 



t240, 245. 

 *Transmission and reception with antenna 



and coil aerials. J. H. DellingER. 



313. 

 Wave front angle in radiotelegraphy. 



L. W. Austin. 101. 

 Science, General. fBritish Association for 



the Advancement of Science, 1920 meet- 

 ing. 166. 

 §Congress, matters of scientific interest in. 



170. 

 Distribution of scientific information in 



the U. S. R. B. SosMAN. 69. 



