INDEX 



709 



Physics. *Atmospheric ionization. 

 W. F. G. Swann. 398. 



fAtmospheric pressure, effect of, on 

 the candlepower of various flames. 

 E. C. Crittenden. 51. 



fThe atom as a miniature solar sys- 

 tem. H. L. Curtis. 633. 



Black body radiation. W. W. Co- 

 blentz. *223, 418. 



{Complex sound waves, analysis of. 

 C. W. Hewlett. 402. 



*Damping of waves and other dis- 

 turbances in mercury. M. H. 

 Stillman. 563. 



{Determination of the average in- 

 terval between departures from 

 the mean greater than a given de- 

 parture. W. J. Spillmax. 300. 



fDiffraction gratings. J. A. Ander- 

 son. 403. 



Elastic systems, stiffness of. M. D. 

 Hersey. 569. 



*Energy distribution in the visible 

 spectrum of an acetylene flame. 

 W. W. Coblentz and W. B. Emer- 

 son. 447. 



Gray body radiation. P. D. Foote 

 and C. O. Fairchild. 193. 



Gray radiation, criteria for. P. G. 

 Nutting. 476. 



fHeat transmission through air 

 layers. H. C. Dickinson. 298. 



Luminosity and temperature of met- 

 als. P. D. Foote. 323. 



{Magnetic field of an atom. W. J. 

 Humphreys. 631. 



*Photometric comparison of glass 

 screens and tungsten lamps. G. 

 \Y. Middlekauff and J. F. Skog- 



LAND. 447. 



*Photometry of gas-filled lamps. 



G. W. Middlekauff and J. F. 



Skogland. 358. 

 Physical quantities, derivatives of. 



M. D. Hersey. 620. 

 Planck's constant C 2 , calculation of. 



J. H. Dellinger. 472. 

 Plastic flow. E. C. Bingham. fl54, 



177. 



{Pyrometer color-screens. P. D. 



Foote. 52. 

 Quartz-wedge saccharimeter and spe- 

 cific rotation of sucrose. F. Bates 

 and R. F. Jackson. 25. 

 *Radiant energy, measurement of. 

 W. W. Coblentz and W. B. Emer- 

 son. 223. 

 *Radiating disk, illumination from. 



P. D. Foote. 222. 

 Radiating materials, temperature 

 and emissivity of. P. D. Foote. 

 317. 

 {Radiation problem. R. A. Milli- 



kan. 301. 

 Radiometers, new designs of. \V. 



W. Coblentz. 473. 

 fSpectral colorimeter of the mono- 

 chromatic type. I. G. Priest. 74. 

 *Thermoclements, protection of. A. 



W. Gray. 399. 

 {Viscosimeters, theory of. E. Buck- 

 ingham. 154 

 Viscosimeters, theory of. M. D. 



Hersey. 525. 

 *Wheatstone bridges, use in resist- 

 ance thermometry. E. F. Muel- 

 ler. 563. 

 *X -ray spectra. C. W. Kanolt. 361. 

 References. 245, 508. 

 See also: Astrophysics; Crystallog- 

 raphy; Electricity; Electrochemis- 

 try; Gravitation; Metallography; 

 Meteorology; Metrology; Physical 

 Chemistry ;Radiotelegraphy; Spec- 

 troscopy; Technology; Terrestrial 

 Magnetism. 

 Physiography. {Alaska, physiographic 

 provinces. A. H. Brooks. 252. 

 fSurface features of Europe as a fac- 

 tor in the war. D. W. Johnson. 

 227. 

 Physiology. References. 463. 



See also: Nutrition; Plant Physiol- 

 ogy. 

 Phytogeography. {Philippine flora, 

 geographic relationships. E. D. 

 Merrill. 78. 



