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INDEX. 



Electrical machine, on a friction and 

 induction, 160. 



Electrodes, on the electrical polarity 

 and inequality of the amalgamated 

 zinc, in sulphate of zinc, 475. 



Electrodynamic phenomena, on the 

 new conception of, suggested by 

 Gauss, 445. 



Electrophorus machine, on the quan- 

 tity of electricity produced by the, 

 expressed in absolute measure, 

 236. 



Equation in differences of the second 

 order, on an, 225. 



Ethylene-sodium, on the compounds 

 of, and of its homologues, 11 7, 1 75 ; 

 on some reactions of hydrated ox- 

 ide of, 358. 



Flame of a Bunsen's burner, on the 

 shape of the, 160. 



Flames, on the temperature of, and 

 its relations with the pressure, 

 111; on the temperature of, and 

 dissociation, 156. 



Fluid, on the uniform motion of an 

 imperfect, 370. 



Forbes's (D.) researches in British 

 mineralogy, 321. 



Gases, on the dispersive power of, 

 75; on the spectra of the flames 

 of, containing carbon, 208 ; on the 

 spectra of certain, in Geissler's 

 tubes, 405. 



Gauss, on the new conception of 

 electrodynamic phenomena sug- 

 gested by, 445. 



Geological Society, proceedings of 

 the, 145, 309. 



time, and the probable date of 



the glacial period, on, 206. 



Gibbs (W. B.)on Tyndall's cometary 

 theory, 404. 



Glaciers, on the physical cause of the 

 motion of, 201, 229, 363. 



Gold, analyses of native, 321. 



Gore (G.) on hydrofluoric acid, 470. 



Graham (T.) on the relation of hydro- 

 gen to palladium, 122. 



Granites, on a comparison of the, of 

 Cornwall and Devon with those of 

 Leinster and Mourne, 306. 



Guthrie (Prof. F.) on the thermal re- 

 sistance of liquids, 468. 



Haidinger(W. von) on the luminous, 

 thermal, and acoustic phenomena 

 attending the fall of meteorites, 

 246. 



Haughton (The Rev. S.) on the gra- 



nites of Cornwall and Devon, Lein- 

 ster and Mourne, 306. 



Heat, on the production of, by the 

 rotation of a disk in vacuum, 26, 

 97, 287; on a development of, 

 which accompanies the bursting of 

 Prince Rupert's drops, 478. 



Herschel (Lieut. J.) on the lightning- 

 spectrum, 142. 



How (Prof.) en the mineralogy of 

 Nova Scotia, 264. 



Huggins (W.) on some spectrum ob- 

 servations of comets, 456. 



Hydrofluoric acid, researches on, 

 470. 



Hydrogen, on the spectra of, 405. 



Hydrogenium, observations on, 122 ; 

 on the motion of a palladium plate 

 during the formation of, 424,474. 



Kohlrausch (Prof. F.) on the quan- 

 tity of electricity produced by the 

 electrophorus machine, expressed 

 in absolute measure, 236. 



LeConte (Prof. J.) on some pheno- 

 mena of binocular vision, 131. 



L'Hote (M.) on the generation of 

 ozone in oxygen and in air under 

 the influence of the electric spark, 

 79. 



Lielegg (Prof. A.) on the spectra of 

 the flames of gases containing car- 

 bon, 208. 



Light, on the measurement of the 

 luminous intensity of, 227 ; on the 

 absorption of, by the air, 293 ; on 

 the polarization of, by cloudy mat- 

 ter, 384. 



Lightning-spectrum, on the, 142. 



Lignite, analysis of, 265. 



Liquid waves, on the interference of, 

 240. 



Liquids, on some phenomena con- 

 nected with the boiling of, 161 ; on 

 the galvanic resistance of, 271 ; on 

 the thermal resistance of, 468. 



Lissajous (M.) on the interference of 

 liquid waves, 240. 



Lockyer (J. N.) on the spectrum of a 

 solar prominence, 43; on spectro- 

 scopic observations of the sun, 144. 



Logarithmic waves, on two remark- 

 able resultants arising out of the 

 theory of rectifiable compound, 

 375. 



Magnet, on a new form of permanent, 

 18. 



Magnetism of chemical compounds, 

 on the, 314. 



