INDEX. 



1031 



Relf (E. F.) on the sound emitted 

 bv wires exposed to an air current, 

 173. 



Richardson (Prof. 0. W.) on the 

 excitation of soft characteristic 

 X-rays, 1015. 



Rideal (Prof. E. K.) on the critical 

 energy increment and Trouton's 

 rule, 156. 



Rigidity, on the effect of tempera- 

 ture on, 397. 



Rixon (Dr. F. W.) on the chromo- 

 genetic properties of sulphur, 259. 



Rock-salt, on the reflexion of X-rays 



by, l. 



Rubidium, on the mass spectra of, 

 436. 



Rutherford (Sir E.) on the artificial 

 disintegration of light elements, 

 809. 



Sakai (S.) on the effect of tempera- 

 ture on the rigidity and viscosity 

 of solid meta 7 s, 397. 



Scientific inquiry, on the fundamen- 

 tal principles of, 369. 



Selenium, on the mass spectra of, 

 140 ; on the variation of the re- 

 sistance of, with temperature, 463. 



Self-inductance of small loops, on a 

 method of measuring the, 220. 



Sen (N. R.) on a type of vibration 

 of an elastic spherical shell, 185. 



Sethi (Prof. N. K.) on the diffrac- 

 tion of light by cylinders and 

 spheres in a medium of nearly 

 equal refractive index, 669. 



Shaft, on the whirling speeds of a 

 loaded, 635. 



Shellac, on the electrical conduc- 

 tivity of, 498. 



Shenstone (A. G.) on the effect of 

 an electric current on the photo- 

 electric effect, 596. 



Shielded frame aerial, on the recep- 

 tion of wireless waves on a, 502. 



Silver, on the viscosity of, 115 ; on 

 the variation of the rigidity of, 

 with temperature, 409. 



halides, on the crystal structure 



of the, 262. 



Slater (F. P.) on the excitation of 

 gamma radiation by alpha particles 

 from radium emanation, 904. 



Smith (B.) on the lower paleozoic 

 rocks of Llangollen, 197. 



Smith (C. J.) on the viscosity and 

 molecular dimensions of gaseous 



ammonia, phosphine, and arsine, 

 601 ; of methane, sulphuretted 

 hydrogen, and cyanogen, 615. 



Sodium, on the mass spectra of, 436. 



Solenoids, on electric oscillations in, 

 265. 



Sound, on the, emitted by circular 

 wires exposed to an air-current, 

 173. 



waves in the atmosphere, on, 96. 



Spectra, on the mass, of chemical 

 elements, 140 ; of the alkali metals, 

 on the, 436 ; on hydrogen, from 

 long vacuum tubes, 729." 



Spectral line effect, on the Einstein, 

 264. 



Spectrum, on the L-, of mercury, 

 419. 



Spheres, on the diffraction of light 

 by, 669. 



Spherical shell, on a type of vibra- 

 tion of an elastic, 185. 



Splashes, on the sounds of, 773. 



Steel, on the viscosity of, 115; on 

 the variation of the rigidity of, 

 with temperature, 411 ; on the 

 variation of the elasticity of, with 

 temperature, 442. 



Stormer (Prof. C.) on recent north- 

 light investigations, 1019. 



Striated discharge, on a theory of 

 the, 981. 



Strontium, on the isotopes of, 863. 



Sulphur, on the chromogenetic pro- 

 perties of, 259. 



Sulphuretted hydrogen, on the vis- 

 cosity and molecular dimensions 

 of, 615. 



Surface energy, on latent heat and, 

 183. 



Swinton (A. A, C.) on the reception 

 of wireless waves on a shielded 

 frame aerial, 502, 



Tellurium on the mass spectra of, 

 140, 



Temperature, on the effect of, on the 

 rigidity and viscosity of metal?. 

 397 ; on the effect of, on the mo- 

 dulus of elasticity of steel, 442. 



Thomas (Dr. J. S. G.) on the mutual 

 action of convection currents from 

 heated platinum wires. 940. 



Thompson (G. P.) on the application 

 of anode rays to the investigation 

 of isotopes, 857. 



Thomson (Sir . I. .1.) on a theory of 

 the striated discharge, 981, 



