461 



INDEX to VOL. IX. 



Acoustical observations, 27& 



Acoustics, on some lecture-experi- 

 ments in, 75. 



Amalgams, on two new, 146. 



Ayrton (Prof. W. E.) on a disper- 

 sion-photometer, 117 ; on the de- 

 termination of the acceleration of 

 gravity for Tokio, 292. 



Berthelot's thermo-chemistry, obser- 

 vations on, 367. 



Bidwell (S.) on the influence of 

 friction upon the generation of a 

 voltaic current, 374. 



Birt ( W. E.) on the cyclones of the 

 Bay of Bengal, 221. 



Bismuth, on some crystalline forms 

 of, 185. 



Blake (Rev. J. F.) on the Portland 

 rocks of England, 151. 



Boltzmann (Prof. L.) on gas-friction, 

 and on the velocity of electricity 

 in the electric current, 307. 



Books, new : — Rand Capron's Au- 

 roras, their characters and spectra, 

 65 ; Plante's Recherches sur l'Elec- 

 tricite, 71 ; Lunge's Manufacture 

 of Sulphuric Acid and Alkali, 148 ; 

 Beyer's Volcanos of Bohemia, and 

 Stanniferous Rock-formation in 

 the Erzgebirge, 149 ; Geology of 

 "Wisconsin, 302 ; Minchin's Trea- 

 tise on Statics, 305 ; Blanford's In- 

 dian Meteorological Memoirs, 377. 



Bosanquet (R. H. M.) on the mea- 

 sure of the intensity of sound, 174. 



Boutigny (P.-H.) on the laws which 

 govern matter in the spheroidal 

 state, 457. 



Bridge (J.) on a calculating appara- 

 tus based on Napier's rods, 191. 



Cailletet (L.) on the compression of 



gaseous mixtures, 235. 

 Calculating apparatus, on a, 191. 

 Calculations, on a method of check- 

 ing, 56. 



Capron (J. R.) on the relative inten- 

 sity of the spectral lines of gases. 

 329. _ 



Carbonic acid, on the behaviour of, 

 in relation to pressure, volume, and 

 temperature, 393. 



Causal research, on method in, 

 356. 



Challis (Prof.) on Newton's Regula 

 tertia philosophandi, 21, 448 ; on 

 the hydrodynamical theory of the 

 physical forces, 448. 



Chemical affinity, on the determina- 

 tion of, in terms of electromotive 

 force, 237, 331. 



Chlorine, on the constitution of, 35. 



Clausius (Prof. R.) on the behaviour 

 of carbonic acid in relation to pres- 

 sure, volume, and temperature, 393. 



, on a general theorem advanced 



by, 458. 



Cockle (Sir J.) on primary forms, 

 348. 



Conductivity, on the, of bodies, 386. 



Cooke (J. P., jun.) on Berthelot's 

 thermo-chemistry, 367. 



Copper, on some crystalline forms of, 

 180. 



Crystallization, a suggestion in regard 

 to, 267. 



Crystallographic notes, 180. 



Crystals, on the dilatation of, on 

 change of temperature, 81. 



Cyclones of the Bay of Bengal, 221. 



Deville (H. Ste.-Claire) on the deter- 

 mination of high temperatures, 

 390. 



Dielectrics, on the dioptric actions of, 

 157. _ 



Dispersion-photometer, on a, 117. 



Douglas (J. C.) on the use of silver 

 films in improved instruments of 

 the camera-lucida class, 409. 



Draper (Prof. J. W.) on a new stand- 

 ard of light, 76, 



