INDEX. 



60' 



Fluid, on the flow of compressible, 

 past an obstacle, 1. 



, on convection currents in a 



horizontal layer of, 529. 

 Fluorescent vapours and their mag- 

 neto-optic properties, on, 2^5. 

 Friman (Dr. E.) on the high-fre- 

 quency spectra of the elements 

 tantalum-uranium, 39 ; on the X- 

 ray vacuum spectrograph, 494 ; 

 on the high-frequency spectra of 

 the elements lutetium-zinc, 497. 



Gadolinium, on the high-frequency 



spectrum of, 497. 

 Oases, on the discharge of, under 

 high pressures, 177 ; on the ve- 

 locity of secondary cathode rays 

 emitted by, under the action of 

 high-speed cathode rays, 202 ; on 

 the absorption of, in vacuum- 

 tubes, 239 ; on scattering and re- 

 gular reflexion of light hy absorb- 

 ing, 329 ; on the condensation 

 and reflexion of molecules of, 364 ; 

 on experiments with electron cur- 

 rents in different, 426 ; on diffu- 

 sion cells in ionized, 409; on the 

 mobility of the negative ion in, 

 441. 



Geological Society, proceedings of 

 the, 175, 526. 



Glass, on a new method of mea- 

 suring the refractive index and 

 dispersion of, 409. 



Gold, on the high-frequency spec- 

 trum of, 39 ; on the crystalline 

 structure of, 66 ; on the Hall and 

 Corbino effects in, 303. 



Green (Dr. G.) on a method of de- 

 riving Planck's law of radiation, 

 229. 



Hall effect, on the, 200, 303. 



Helium, on the ionization potential 

 of, 566. 



High-pressure installation, on a 

 semi-automatic, 153. 



Hobbs (Miss E. W.) on the change 

 in resistance of a sputtered film 

 after deposition, 141. 



Hodgson (Dr. B.) on the absorption 

 of gases in vacuum-tubes, 239. 



Holmes (A.) on the tertiary volcanic 

 rocks of Mozambique. 526. 



Homologous compounds, on the 

 boiling-points of, 371. 



Hop wood (F. LI.) on the crystalline 



structure of the alkali sulphates, 

 518. 

 Hydrocarbons, on the spectra of, 546. 

 Hydrogen, on the decrease in the 

 paramagnetism of palladium caused 

 by absorbed, 131. 

 Ikeuti (H.) on the tracks of the alpha 

 particles from radium A in photo- 

 graphic films, 129. 

 Image formation by crystalline 



media, on, 248. 

 Indium, on the high-frequency 



spectrum of, 497. 

 Induction, on the existence of mutual, 



between masses, 592. 

 Iodine, on the high-frequency spec- 

 trum of, 497. 

 Ion, on the mobilitv of the negative, 



441. 

 Ionization, on residual, 396. 



potential of helium, on the, 566. 



Ionized gases, on diffusion cells in, 



499. 

 Iridium, on the high-frequency spec- 

 trum of, 39. 

 Iron, on the Hall and Corbino effects 



in, 303. 

 Ishino (M.) on the velocity of secon- 

 dary cathode rays emitted by a 

 gas under the action of high-speed 

 cathode rays, 202. 

 Jeffreys (H.) on the compression of 



the earth's crust in cooling, 575. 

 Kerne (Dr. H. B.) on the refraction 



of X-radiation, 603. 

 Kimura(M.) on the scattering and 

 regular reflexion of light by an 

 absorbing gas, 329. 

 Kingdon (K. H.) on some experi- 

 ments on residual ionization, 396. 

 Knipp (Prof. C. T.) on a Wehnelt 

 cathode-rav tube magnetometer, 

 381. 

 Lanthanum, on the high-frequency 



spectrum of, 497. 

 Laws (B. C. ) on the strength of the 



thin-plate beam, 1 72. 

 Lead, on the high-frequency spec- 

 trum of, 39; on the crystalline 

 structure of, 66. 

 Leest action, on the principle of, in 

 the theory of electrodynamics, 

 195. 

 Light, on the scattering and iregular 

 reflexion of, by an absorbng gas, 

 329. 



