1040 



1 IS T D E X. 



Foord (C. W. H.) on the air-pres- 

 sures used in playing reed instru- 

 ments, 271. 



Gamma rays, on the, of polonium, 

 radium, and radioactinium, 112 ; 

 on secondary, 225- on the, from 

 uranium products, 252; on the 

 number of ions produced by the, 

 from radium, 391 ; on the absorp- 

 tion of, 601 ; on the wave-length 

 of the soft, from radium B, 854. 



Gardiner (C. I.) on the Qrdovician 

 and Silurian rocks of the Lough 

 JNafooey area, 538. 



Gases, on delta rajs from, 83; on 

 the electrification at the surfaces 

 between liquids and, 297 ; on in- 

 terference experiments in highly 

 rarefied, 397 ; on the distribution 

 of energ} r in the spectra of, 475 ; 

 on the discharge of electricity 

 through, 789; on the fluorescence 

 of, excited by ultra -Schumann 

 waves, 899 ; on the disintegration 

 of ion clusters in, under the influ- 

 ence of an electric field, 917. 



Geological Societv, proceedings of 

 the, 223, 538, 1035. 



Gibson (W. H.) on the influence of 

 volume change on the fluidity of 

 mixtures, 662. 



Glacier, on the Hintereis, 153. 



Godlewski (Prof. T.) on the action 

 of colloids on radioactive products 

 in solution, 618. 



Granite, on the thermal conductivity 

 and specific heat of, 58. 



Gray (Prof. A.) on canonical rela- 

 tions in general dynamics, 22 ; 

 notes on electricitvand magnetism, 

 428. 



Hall effect, on the, in liquid and 

 solid mercury, 109; on electro- 

 magnetic effects related to the, 

 244. 



Hargreaves (R.) on Wien's law, 

 616. 



Hasse (H. R.) on the equations of 

 electrodynamics and the principle 

 of relativity, 43. 



Hemsalech (G. A.) on the fluores- 

 cence of gases excited by ultra- 

 Schumann waves, 899. 



Hevesy (Dr. G. von) on the diffusion 

 and valency of the radio-elements, 

 586. 



Hintereis glacier, on the, 153. 



Hodgson (Dr. B.) on heating effects 

 at the anode in vacuum-tubes, 

 189. 



Howe (Prof. G. W. O.) on the effect 

 of ionization of air on electrical 

 oscillations, 213. 



Hydrogen, on the ionization in com- 

 pounds of, by X-radiation, 177 ; 

 on the passage of alpha particles 

 through, 824. 



Hughes (Dr. A. LI.) on the long- 

 wave limits of the normal photo- 

 electric effect, 473. 



Hughes (H. G.) on cathode disinte- 

 gration in a vacuum-tube, 415. 



Images, on the formation of, by an 

 opaque disk, 673. 



Induction-coil potentials, on, 565. 



Integration, on the, of a class of 

 linear differential equations of the 

 second order, 608 ; on the, of the 

 differential equation applicable to 

 a plane progressive wave, 669. 



Interference experiments in a highly 

 rarefied gas, on, 397. 



Interferometers, on crossed spectra 

 obtained by combinations of, 126. 



Iodine vapour, on the fluorescence 

 of, 531 ; on the magneto-optics of, 

 1009. 



Ion cluster, on the disintegration of 

 an, in a gas under the influence 

 of an electric field, 917. 



Ionic dissociation, on the hypothesis 

 of, 459. 



Ionization, on the, in compounds of 

 carbon by X-radiation, 177; on 

 the energy required for, by colli- 

 sion, 269 ; on, in the unstriated 

 discharge and in the arc, 277 ; on r 

 and wireless telegraphy, 21 3, 381 ; 

 on the electrons liberated in, 755 ; 

 by collision, on the initial stages 

 of, 963. 



Ions, on the number of, produced by 

 gamma radiation from radium, 

 394; on the recombination of, 

 made by alpha rays, 755. 



Iron, on the anhysteretic magnetic 

 properties of, 357. 



Isotropic media, on the intrinsic 

 optical activity of, 468 ; on the 

 rotational optical activity in, 

 994. 



Jeans (J. H.) on the interaction 

 between radiation and free elec- 

 trons, 14. 



