454 



INDEX. 



Edison's incandescent paper-carbon 

 horseshoe lamp, measurements of 

 an, 21. 



Electric current, on Boltzmann's me- 

 thod for determining the Telocity 

 of an, 136 ; on the new action of 

 magnetism on a permanent, 301, 

 430. 



discharge in rarefied gases, on 



the, 1 73, 234 ; on the thermic and 

 optical behaviour of gases under 

 the influence of the, 357, 407. 



lamp, on Edison's paper-carbon, 



21. 



resistance of glass, on the, 226. 



expansion, researches on, 



Electrical 

 30. 



Electricity, on changes of elasticity 

 caused by, 34 ; on the cause of the 

 production of, by the contact of 

 heterogeneous metals, 280 ; on the 

 disruptive discharge of, 389. 



Electrodes, on the illumination of, 

 387. . 



Electrodynamic paradox, on an, 215. 



potential, on the employment 



of the, for the determination of the 

 ponderomotive and electromotive 

 forces, 255. 



Electromagnetic unit, on the number 

 of electrostatic units in the, 431. 



Electrometers, on the construction 

 of guard-ring, 72. 



Energy, on the conservation of, 338. 



Eulerian circles, on, 1. 



Evolution by subtraction, on, 190. 



Exner (Prof. F.) on contact electri- 

 city, 280. 



Ferment, on a new digestive, 139. 



Fitzgerald (G. F.) on the conducti- 

 vity of tourmaline crystals, 67 ; on 

 the construction of guard-ring elec- 

 trometers, 72. 



Fletcher (L. B.) on the relation be- 

 tween the mechanical equivalent 

 of heat and the ohm, 436. 



Fluid, on steady motion in an incom- 

 pressible viscous, 342. 



Fluids, on the electric expansion of, 

 35. 



Galvanic calibration of a wire, on a 

 simple method of, 60. 



Galvanometer, on a new form of, 138. 



Gas, on the criterion for determining 

 the critical point of a, 40, 145. 



Gases, on the electric discharge in 



rarefied, 173, 234 j on the absorp- 

 tion of radiant heat by, 210 ; on 

 the thermic and optical behaviour 

 of, under the influence of the elec- 

 tric discharge, 357, 407. 



Gee (W. "W.) on a modification of 

 Bimsen's calorimeter, 171. 



Geological Society, proceedings of 

 the, 63, 131, 447. 



G^rard-Lescuyer (M.) on an electro- 

 dynamical paradox, 215. 



Glass, on the electric perforation of, 

 37 ; on the electric resistance of, 

 at different temperatures, 226. 



Glazebrook (R. T.) on Nicol's prism, 

 247. 



Goldschmidt (H.) on an acoustic 

 method of determining vapour- 

 densities, 300. 



Goldstein (Dr. E.) on the electric 

 discharge in rarefied gases, 173, 

 234. 



Gostynski (L.) on a new form of 

 galvanometer, 138. 



Gravity, on the determination of the 

 acceleration of, for Tokio, 43. 



Gray (T.) on the electric resistance 

 of glass at different temperatures, 

 226. 



Guthrie (F.) on magneto-electric 

 induction, 328. 



Hall (E. H.) on Boltzmann's method 

 of determining the velocity of an 

 electric current, 136 ; on the new 

 action of magnetism on a perma- 

 nent electric current, 301, 430. 



Heat, on the absorption of radiant, 

 by gases and vapours, 210 ; on the 

 relation between the mechanical 

 equivalent of, and the ohm, 436. 



Hennessy (H.) on the figure of the 

 planet Mars, 119. 



Hertz (H.) on induction in rotating 

 spheres, 451. 



Holtz (W.) on the action of hollow 

 in comparison with that of solid 

 steel magnets, 213. 



Hopkinson (J.) on the action of mag- 

 netism on a permanent electric 

 current, 430. 



Hummel (Rev. F. H.) on evolution 

 by subtraction, 190. 



Images, on an application of acci- 

 dental, 134. 



Induction in rotating spheres, on, 

 451. 



