452 



INDEX. 



a mathematical theory of heat, 202 ; 

 on the theory of elhptically-polar- 

 ized hght, 285 ; on the resistance 

 of the luminiferous medium to the 

 motions of planets and comets, 352; 

 on the relation of pressure to den- 

 sity, 401. 



Chemical notices from foreign jour- 

 nals, 275, 422. 



Chitonida;, on the Permian, 308. 



Chlorous acid, on the prejjaration of, 

 422. 



Cinchona alkaloids, researches on the, 

 218. 



Clausius (Prof. R.) on the mean 

 length of the paths described by 

 the separate molecules of gaseous 

 bodies on the occurrence of mole- 

 cular motion ; with remarks on the 

 mechanical theory of heat, 81. 



Climate, on terrestrial, as influenced 

 by the distribution of land and 

 water, 181. 



Coal, on the vegetable structures in, 

 308. 



Coal-formation, on the probable depth 

 of the, under Oxford and North- 

 amptonshire, 381. 



Cockle (J.) on the theory of equa- 

 tions of the fifth degree, 356. 



Comet, thoughts on the formation of 

 the tail of a, 78. 



Comets, note on the polarization of 

 the light of, 311; on the resistance 

 of the luminiferous medium to the 

 motions of, 352. 



Copper and iron, on a native sulphate 

 of, 449. 



Craters of elevation, on the theorv 

 of, 56. 



Crocodilus Hastingsia, on the dermal 

 armour of, 375. 



Curves of the third order, on, 71. 



Cynochampsa laniarius, description 

 of, 378. 



Dale (Rev. T. P.) on the influence of 

 temperature on the refraction of 

 light, 222. 



Dawes (W. R.) on some large solar 

 spots, 152. 



Dawson (Dr. J. W.) on fossil plants 

 from the Devonian rocks of Canada, 

 147 ; on the vegetable, structures in 

 coal, 308. 



Debus (Dr. II. j on the action of am- 

 monia on glyoxal, 211. 



Density, on the relation of pressui'c 

 to, 401. 



Deville (H. Sainte-Claire) on apatite, 

 Wagncrite, and some artificial spe- 

 cies of metallic phosphates, 129; on 

 the artificial formation of minerals, 



277. 



Diamides, on the, 63. 



Dibromallylammonia, on a compound 

 of, and chloride of mercury, 194. 



Dicynodon, on new species of, 306, 

 380. 



Dove (Prof.) on the difference pre- 

 sented by the jirismatic spectrum 

 of the electric light in vacuo at the 

 positive and negative poles, 79 ; 

 on the stereoscopic representation 

 of print, as seen through Iceland 

 spar, 414 ; on the application of 

 the stereoscope to distinguish prints 

 from reprints, 415. 



Drach (S. M.) on Prof. Smyth's Te- 

 neriffe meteorological observations, 

 450. 



Dumas (M.) on the preparation of 

 calcium, 278 ; on the equivalents 

 of the elements, 423. 



Duppa (B. F.) on the action of pen- 

 tachloride of phosphorus on malic 

 acid, 281. 



Earth, on the thickness of the crust 

 of the, 327, 397. 



Egerton (Sir P.) on the fishes of the 

 old red sandstone, 445. 



Electric conductibility of metallic 

 wires, on the effect of pressure on, 

 441. 



• current, on vibrations produced 



by a, 417. 



light, on the difference jn-esented 



by the prismatic sjiectrum of the, 

 in vacuo at the positive and nega- 

 tive poles, 79 ; on the stratification 

 of the, 10.9, 269, 432, 447. 



Electricity, on the rotation of metallic 

 spheres by, 107, 417; new appa- 

 ratus for observing atmospheric, 

 312 ; note as to the relation of 

 common and voltaic, 345 ; on cer- 

 tain vibrations j)roduced by, 359, 

 417; on the phosphorescence of 

 gases by the action of, 383. 



Electrolytic conduction, on the law of, 

 394. 



Energy, on the conservation of, 250, 

 347: 



