INDEX. 



469 



Desains (P.) on Newton's coloured 

 rings, 236. 



Dewar (J.) on the physical constants 

 of hydrogenium, 334. 



Diffraction-gratings, on the manufac- 

 ture and theory of, 81, 193. 



Disk, on the heating of a, by rapid 

 rotation in vacuo, 219. 



Ebonite, on the expansibility of, by 

 heat, 156. 



Electric conductors, on the number 

 and weight of the molecules of 

 aether contained in electric conduc- 

 tors, 190. 



discharge, on the effects of mag- 

 netism on the, through a rarefied 

 gas, 462. 



Electrical machines, on a simple con- 

 densing collector for frictional, 

 49. 



and capillary phenomena, on the 



connexion between, 281. 



resistance, on the absolute value 



of the Siemens mercury unit of, 

 294, 342. 



Electricity, on the action of, on gases, 

 309. 



Electrified conductors, on the dis- 

 charge of, 157. 



Electrodes, on the disintegration of 

 the, in the galvanic arc of light, 6. 



Electromagnet, on the calorific effects 

 of the magnetism in an, with seve- 

 ral poles, 392. 



Electromagnetic unit, on the number 

 of electrostatic units in the, 218. 



Elliptic transcendent identity, on the 

 verification of an, 437. 



Energy, on the measure of work in 

 the theory of, 291. 



Fleming (J. A.) on the new contact 

 theory of the galvanic cell, 401. 



Fluid, on double refraction in a vis- 

 cous, in motion, 390. 



Fog, on the effects produced by, in 

 the atmosphere, on the intensity of 

 sound, 277, 374. 



Fraunhofer's lines, on the determina- 

 tion of the prime angle of incidence 

 and prime azimuth for the different, 

 321. 



Galvanic polarization in liquids free 

 from gas, observations on, 145. 



■ cell, on the new contact theory 



of the, 401. 



Gas-analysis, on an apparatus for, 1. 



Gases, on the action of electricity on, 

 309. 



Geological Society, proceedings of 

 the, 74, 229, 313, 457. 



Geometrical problem, on a direct so- 

 lution of a, 354. 



Gladstone (Dr. J. H.) on an air-bat- 

 tery, 61. 



Glaisher (J. W. L.) on the verifica- 

 tion of an elliptic transcendent 

 identity, 437. 



Gun-cotton, on the spectrum of the 

 light of exploding, 319. 



Hallite, on the crystallographic struc- 

 ture and chemical composition of, 

 264. 



Hautefeuille (P.) on hydrogenized pal- 

 ladium, 397. 



Heat, on the mechanical equivalent 

 of, 1 55 ; on the expansibility of 

 ebonite by, 151. 



Heaviside (O.) on Wheatstone's 

 bridge, 93 ; on telegraphic signal- 

 ling with condensers, 426. 



Helmholtz (Dr.) on galvanic polariza- 

 tion in liquids free from gas, 145 ; 

 on the limits of the effective power 

 of microscopes, 236. 



Herschel (Capt. J.) on a new form of 

 calendar, 357. 



Her wig (H.) on the disintegration of 

 the electrodes in the galvanic arc 

 of light, 6; on the number and 

 weight of the molecules of aether 

 contained in electric conductors, 

 190. 



Hesse (Mr.) on the direct solution of 

 a geometrical problem, 354. 



Holtz machine, on a spark-adjuster 

 for the, 467. 



Hubener (J.) on a peculiar occurrence 

 of crystallized silicic acid, 319. 



Hydrodynamics, on the analytical 

 principles of, 25, 143. 



Hydrogenium, on the physical con- 

 stants of, 334. 



Ice, on some crystalline forms of, 

 122. 



Illumination, on some phenomena of, 

 77. 



Insulated wires, on a method of find- 

 ing faults in, 416. 



Iron, on the molecular changes that 

 accompany the magnetization of, 51. 

 Isomers, on the mathematical theory 

 of, 444. 



