INDEX. 



821 



Gases, on residual ionization in, 

 415. 



Geological Society, proceedings of 

 the, 446. 



Haines (W. B.) on ionic mobilities 

 in hydrogen and nitrogen, 503. 



Hall effect, on the electron theory 

 of the, 526. 



Harkins (Prof. W. D.) on energy 

 relations involved in the formation 

 of complex atoms, 723. 



Harris (T.) on the distribution of 

 electric force in the discharge at 

 low pressures, 182. 



Harrison (Prof. E. P.) on the tem- 

 perature coefficient of Young's 

 modulus for electrically heated 

 iron wire, 373. 



Helium and hydrogen, on the spec- 

 trum of the positive column in a 

 mixture of, 805. 



Hicks (Prof.W.M.) on the calculation 

 of series in spectra, 734. 



Hitchins (Miss A. F. R.) on the life- 

 period of ionium, 209. 



llorton (Prof. F.) on the Zeleny 

 electroscope, 381. 



Hughes (Prof. T. McK.) on the 

 gravels of East Anglia, 446. 



Hydrogen, on the passage of alpha 

 particles through, 240 ; on ionic 

 mobilities in, 503, 743; on the 

 construction of compound mole- 

 cules of the organic compounds of 

 carbon and, 613 ; on the ionization 

 of, by X rays, 644 ; on the ioniza- 

 tion tracks of alpha rays in, 676 ; 

 on the spectrum of the positive 

 column in a mixture of helium 

 and, 805. 

 Induction-coils, on the most effec- 

 tive primary capacity for, 224. 



Infra-red spectrum, on the, of the 

 mercury arc, 683 ; on the dis- 

 persion of carbon dioxide in the, 

 787. 



Intermittent vision, on, 701. 



Ionic mobilities in hydrogen and 



nitrogen, on, 503, 743. 

 Ionium, on the life-period of, 209. 

 Ionization, on the probability of, and 

 radiation of gas molecules due to 

 collision with electrons, 244; on 

 residual, in gases, 415 ; on the 

 residual, in air enclosed in a vessel 



Ionization tracks, on the, of alpha 

 rays in hydrogen, 676. 



Ions, on the mobility of negative, at 

 low pressures, 321 ; on the mobi- 

 lities of, in air at high nressures, 

 484. 



Iron wire, on the temperature co- 

 efficient of Young's modulus for 

 electrically heated, 373. 



Jones (Prof. E. T.) on the most 

 effective primary capacity for in- 

 duction-coils and Tesla coils, 224. 



Kaufmann (G. von) on the general 

 theorv of corresponding states, 

 146. 



Keys (D. A.) on the mobilities of 

 ions in air at high pressures, 484. 



Lantsberry (W. O.) on the passage 

 of alpha particles through hydro- 

 gen, 240. 



Light, on the unit of candle-power 

 in white, 63 ; on the scattering 

 and regular reflexion of, by gas 

 molecules, 87 ; on the polarization 

 of, scattered by spherical metal 

 particles, 459. 



absorption and fluorescence, on, 



510. 



Lindemann (Dr. F. A.) on the rela- 

 tion between the life of radio- 

 active substances and the range 

 of the rays emitted, 560. 



Line spectra, on radiation from an 

 electric source and, 784. 



Livens (G. H.) on the number of 

 electrons concerned in metallic 

 conduction, 105 ; on the electron 

 theory of metallic conduction, 112, 

 287, 549; on the electron theory 

 of the optical properties of metals, 

 434 ; on the electron theorv of the 

 Hall effect, 526. 



McCleland (N. P.) on the electron 

 theory in organic chemistry, 665. 



McLennan (Prof. J. C.) on residual 

 ionization in gases, 415 ; on the 

 residual ionization in air enclosed 

 in a vessel of ice, 428 ; on the 

 ultra-violet spectrum of elemen- 

 tary silicon, 482; on the mobi- 

 lities of ions in air at high pres- 

 sures, 484 ; on the delta radiation 

 emitted by zinc when bombarded 

 by alpha rays, 491 ; on the ioniza- 

 tion tracks of alpha rays in hy- 

 drogen, 676 ; on the infra-red 



