I X D E X. 



955 



Burton (Dr. C. V.) on a thermostat 

 for controlling the temperature of 

 a room, 211. 

 Calcium nitrate, on the positive 



ionization from, 672. 

 Campbell (N.) on delta rajs, 276. 

 Carter (H.) on the radioactive pro- 

 perties of high temperature flames, 



805. 

 Cathode rays, on the variation of 



ionizing power with the velocity 



of, 647. 

 Chemical elements, on a structural 



theory of the, 864. 

 — — ■ potential, on the application of 



the theory of. to the theimo- 



dynamical theory of solutions, 933. 

 Chladni's figures, on the calculation 



of, for a square plate, 225. 

 Cometary bodies, on the origin of, 



741. 

 Condenser, on the magnetic field 



produced by a charged, moving 



through space, J 50. 

 Conduction, on the mode of, in 



gases, 1, 656, 816 ; on ihe number 



of electrons concerned in metallic, 



245 ; problems in the, uf heat, 



381. 

 Constants, Annual Tables of, 223. 

 Continuity of the liquid and gaseous 



states, on the equation of, 221. 

 Crandall (I. B.) on groove-form and 



energy distribution of diffraction 



gratings, 534. 

 Delta rays, on, 276. 

 Dielectric sphere, on the initial 



accelerated motion of a rigidly 



charged, 169. 

 Diffraction gratings, on groove-form 



and energy distribution of, 534. 

 Dispersion, on absorption and, 3C3. 

 Dispersive medium, on aberration in 



a, 130. 

 Ditto (R. C.) on the diffusion of 



neon through hot quartz, 704. 

 Donaldson (H.) on the spectra of 



the electrodeless ring discharge in 



certain gases, 720. 

 Earth, on the age of the, 357 ; on 



the rigidity of the, 481 ; on the 



intensity of the penetrating radi- 

 ation of the, at different altitudes, 



639. 

 Electric discharge, on the intensity 

 of the ultra-violet light emitted 

 by an, at low pressures, 412. 



Electric experiments with mercury 

 contained in tubes, on, 506. 



vacuum valves, on the mode 



of conduction in gases illustrated 

 by the behaviour of, 1. 

 Electricity, on rays of positive, from 

 the Wehnelt cathode, 926. 



Electrolytes, on weak, and a dyna- 

 mical theory of solutions, 17. 



Electrons, on the emission and ab- 

 sorption of energy by, (6; on the 

 number of, concerned in metallic 

 conduction, 245 ; on the emission 

 of, by metals under the influence 

 of alpha rays, 907. 



Eleqtrostriction, on, 889. 



Elements, on a structural theory of 

 the, 864 ; on a relation between 

 the atomic volumes and spectra 

 of the, 992. 



Elliptic interference with reflecting 

 gratings, on, 118. 



Emanation, on the solubility of 

 radium, 840. 



Emanations, on the transformation 

 and nomenclature of the, 621. 



Energy, on the emission and ab- 

 sorption of, by electron*, 66 ; 

 on the problem of partition of, 

 663. 



Equation, on Fourier's theorem con- 

 cerning the roots of an algebraical, 

 173, 668. 



Eve (Dr. A. S.) on the coefficient of 

 absorption by air of the beta rays 

 from radium C, 8 ; on the number 

 of ions produced by the beta rays 

 and by the gamma rays from 

 radium C, 551. 



Fajans (Dr. K.) on radioactive pro- 

 ducts of short life, 629. 



Falconer (Dr. J. D.) on the geology 

 of Northern Nigeria, 820. 



Flames, on the mobility of the 

 positive ion in, 775 ; on the 

 radioactive properties of high tem- 

 perature, 805. 



Force, on the direction of, 458. 



Fourier's theorem concerning the 

 roots of an algebraical equation, 

 on, 173, 668. 



Franck (Dr. J.) on the question of 

 valency in gaseous ionization, 

 547. 



Fresnel's theory of the reflexion of 

 light, on some consequences of, 

 305. ' 



