470 



INDEX. 



Dalzell (J.) on the existence of sul- 

 phur dichloride, 309. 



De la Rive (A.) on the action of mag- 

 netism on gases traversed by elec- 

 tric discharges, 21 1. 



Douglas (J. C.) on increasing the 

 rigidity of long thin metallic poin- 

 ters, magnetic needles, &c, 67. 



Dumas (M.) on the constitution of 

 milk and blood, 129. 



Earth, on the thickness of the crust 

 of the, 98, 280, 400. 



Electrical resistance, on the increase 

 of, with rise of temperature, and its 

 application to the measure of tern* 

 peratures, 150. 



Electricity, on the direct conversion of 

 dynamic force into, 53; on the 

 transmission of, in liquids, 389, 444. 



Electrodynamic effects, on the velo- 

 city of propagation of, 232. 



Electromotive force of induction in 

 liquid conductors, on the, 465. 



Electro-telegraphy, note on, 159. 



Equation, on the application of a me- 

 chanical, to the motion of a material 

 point round a fixed centre, 321. 



Equations, on a supposed new inte- 

 gration of differential, of the second 

 order, 28, 197, 302. 



Everett (Prof. J. D.) on the general 

 circulation and distribution of the 

 atmosphere, 199. 



Exchanges, on the theory of, 341. 



Fluorescent solutions; on the colour 

 of, 393. 



Fritz (M.) on the connexion of sun- 

 spots with planetary configuration, 

 75. 



Gases, on the cause of the interrupted 

 spectra of, 41 ; on the action of 

 magnetism on, traversed by electric 

 discharges, 211 ; on the spectra of 

 the simple, 395. 



Gauss's Pentagramma mirificum, on, 

 311. 



Geological Societv, proceedings of 

 the, 76, 155, 228, 315, 385. 



Glaciers, on the descent of, 138, 332, 

 415. 



Gladstone (Dr. J. H.) on a law in 

 chemical dynamics, 226. 



Glaisher (J. W. L.) on a class of de- 

 finite integrals, 294, 421. 



Gordon (J. E. H.) on the effect of 

 small variations of temperature on 



steel magnets, 335; on a method 

 of measuring the lateral diffusion 

 of a current in a conductor, 444. 



Gray (J. St. -Clair) on the origin of 

 nerve-force, 413. 



Guthrie (F.) on a spiral Leyden jar, 

 447. 



Hail, on the microscopic structure of, 

 79. 



Heat, on the dynamic theory of, 1, 

 161; on the emission theory of, 34 1 . 



Helmholtz (Dr.) on the velocity of pro- 

 pagation of electrodynamic effects, 

 232. 



Hermann (Dr. L.) on the electromo- 

 tive force of induction in liquid 

 conductors, 465. 



Hudson (Dr, H.) on the theory of ex- 

 changes, 341. 



Huggins (Dr. W.) on the spectrum of 

 Uranus and the spectrum of Comet 

 I., 1871, 223. 



Hydrogen, on the spectra of, 395. 



Hydrokinetic solutions and observa- 

 tions, 362. 



Induction, on the electromotive force 

 of, in liquid conductors, 465. 



Insulators, on a method for detect- 

 ing bad, 103. 



Integrals, on a class of definite, 294, 

 421, 437. 



Jochmann (E.) on the reflection and 

 refraction of light by thin layers of 

 metal, 452. 



Kirk wood (Prof. D.) on the testi- 

 mony of the spectroscope to the 

 truth of the nebular hypothesis, 

 399. 



Leyden jar, on a spiral, 447. 



Light, on the reflection of, from trans- 

 parent matter, 81 ; on the action 

 of, on chlorine and bromine, 290 ; 

 on the reflection and refraction of, 

 by thin layers of metal, 452. 



Liquid, on the steady flow of a, 184, 

 349 ; on the motion of free solids 

 through a, 362 ; on the equilibrium 

 of vapour at a curved surface of, 

 448. 



Liquids, on the transmission of elec- 

 tricity in, 389. 



Loewy (B.) on sun-spots, 75. 



Macaluso (Dr. D.) on the transmis- 

 sion of electricity in liquids, 389. 



Magnetic needles, on increasing the 

 rigidity of long, 6J. 



