956 



INDEX. 



Gamma rays, on the number of ions 

 produced by the, from radium 0, 

 551. 

 Gaseous ionization, on the question 



of valency in, 547. 

 Gases, on the mode of conduction in, 

 1, 65(3, 816; on the charges on 

 ions in, 204 ; on the spectra of 

 the electrodeless ring- discharge in 

 certain, 720; on the separation 

 of spectra in compound, 727 ; on 

 the mobility of positive ions from 

 heated aluminium phosphate in, 

 at low pressures, 791. 



Geiger (Dr. H.) on the transformation 

 of the actinium emanation, 201 ; 

 on the relative number of ions 

 produced by the j3 rays from the 

 various radioactive substances, 

 604 ; on the ranges of the a par- 

 ticles from the radioactive sub- 

 stances and a relation between 

 range and period of transformation , 

 613 ; on the transformation and 

 nomenclature of the radioactive 

 emanations, 621. 



Geological Society, proceedings of 

 the, 220, 465, 820, 953. 



Gill (E. W. B.) on the intensity of 

 the ultra-violet light emitted by 

 an electrical discharge at low pres- 

 sures, 412. 



Glasson (J. L.) on Jlie variation of 

 ionizing power with the velocity 

 of cathode rays, 647. 



Gradation, on the enhancing of 

 photographic, 734. 



Gratings, on elliptic and other inter- 

 ference with reflecting, 118; on 

 polarization of undiffracted long- 

 waved heat rays by wire, 322 ; on 

 groove-form and energy distri- 

 bution of diffraction, 534. 



Groove-form and energy distribution 

 of diffraction gratings, on, 534. 



Guppy (R. J. L.) on the geology of 

 Antigua, 953. 



Gwyther (R. F.) on the stresses in 

 a heavy spherical shell, 191. 



Heaps (C. W.) on the effect of mag- 

 netic fields on metallic resistance, 

 900. 



Heat, on problems in the conduction 

 of, 381. 



rays, on polarization of undif- 



fracted long-waved, by wire grat- 

 ' ings, 322/ 



Helium, on the production of, by 

 radium, 586. 



group of gases, on the reson- 

 ance spectra of iodine vapour and 

 their destruction by the, 469. 



Horton (Dr. F.) on the origin of 

 spectra, 214. 



Houstoun (Dr. R. A.) ou a relation 

 between tension and torsion, 

 740. 



Induction-coil, on the, 706. 



Interference, on elliptic and other, 

 with reflecting gratings, 118. 



Iodine vapour, on the resonance 

 spectra of, 469. 



Ionization, on the mode of, by 

 X-rays, 222 ; on the question 

 of valency in gaseous, 547 ; 

 on the positive, from hot salts, 

 669. 



Ionizing power, on the variation of, 

 with the velocity of cathode ravs, 

 647. 



Ions, on charges on, in gases, 204; 

 on the number of, produced by 

 the beta rays and by the gamma 

 rays from radium C, 551 ; on the 

 relative number of, produced by 

 the /3 particles from the various 

 radioactive substances, 604; on 

 the mobility of the positive, in 

 flames, 775 ; on the mobility of 

 positive, produced from heated 

 aluminium phosphate in gases at 

 low pressures, 791. 



Joly (Prof. J.) on a method of in- 

 vestigating the quantity of radium 

 in rocks and minerals, 134 ; on 

 the a?e of the earth, 357. 



Jones (Prof. E. T.) on the induction- 

 coil, 706. 



Kinoshita (S.) on the amount of the 

 radioactive products present in the 

 atmosphere, 821. 



Kleeman (Dr. R. D.) on the laws of 

 molecular attraction, 355 ; on 

 molecular attraction and the pro- 

 p3ities of liquids, 506. 



Knipp (Prof. (J. T.) on rays of posi- 

 tive electricitv from the Wehnelt 

 cathode, 926. " 



Kovarik (Dr. A. F.) on the relative 

 number of ions produced by the 

 /3 particles from the various radio- 

 active substances, 604. 



Le"merav, (E. M.) on the principle 

 of relativity, 222. 



