INDEX. 



603 



of iron on potash, 412; preparation of 

 guaiaic acid, 413; conversion of bisul- 

 phuret of copper into the sulphuret by 

 electricity, 442 ; succino-hyposulphuric 

 acid, 447 ; on benzoyl compounds, 449 ; 

 compounds of cyanogen with sulphuret- 

 ted hydrogen, 449 ; on the formation of 

 murexid, 452 ; existence of carbon, hy- 

 drogen, and azote, in plants,459 ; on the 

 action of metallic copper on solutions, 

 480; of copper on antimony, 481; on 

 tin, lead, bismuth, mercury, and silver, 

 482 ; of sulphuric acid on protosulphate 

 of iron, 502 ; on the strength of pyroxy- 

 lic spirit, 511; on ferrocyanides, 513. 



Chevalier (M.) on a dioptric telescope, 

 and of a micrometrical lunette, 578. 



Cinnamic acid, action of peroxide of lead 

 on, 38. 



Circles, method of dividing, 325. 



Clarke (Kev. W. B.) on the geological 

 phaenomena in the vicinity of Cape 

 Town, 531. 



Claudet (A.) on a new mode of prepara- 

 tion of the Daguerreotype plates, 167. 



Clibborn (Mr.) on the Leyden jar, 595. 



Comet, Bremicker's, places of, 327 ^ob- 

 servations on, 577. 



Constellations, on a reformation of the, 

 571, 582. 



Copper, analysis of, 100; acid malate of, 

 312; ores, assay of, 330; conversion 

 of bisulphuret of, into sulphuret, 442 ; 

 action of metallic, on solutions, with 

 reference to the detection of arsenic,480. 



Cornwall, electric conditions of the rocks 

 and metalliferous veins of certain mines 

 in, 483. 



Craig (Mr.) on the boulder deposits near 

 Glasgow, 528. 



Creasote, 41 ; analysis of, ib. 



Croft and Francis's notices of the investi- 

 gations of continental chemists, 41, 184, 

 278, 447. 



Crosse (Mr.) on the perforation of non- 

 conducting substances by the mechani- 

 cal action of the electric fluid, 245. 



Crystal, uniaxal, on a thin lens of, 289 ; 

 form of the black cross in biaxal, 305. 



Cumulus cloud, formation of the, 135. 



Cyanogen, compounds of, with sulphu- 

 retted hydrogen, 449. 



Cyanurets of zinc, double, with alkalies 

 and earths, 282. 



Daguerr Jotype plates, new mode of pre- 

 paration of the, 167; voltaic process 

 for etching, 247. 



Daguerreotypes, observations on the, 196. 

 Daniell (Prof.) on the spontaneous evolu- 

 tion of sulphuretted hydrogen in the 

 waters of the western coast of Africa, 

 and of other localities, 1. 



Darwin (C.) on a remarkable bar of sand- 

 stone off Pernambuco, 257 ; on the 

 distribution of the erratic boulders, and 

 on the contemporaneous unstratified 

 deposits of South America, 536. 



Dawes (Rev. W. R.) on a new binary star, 

 241 ; on Bremicker's comet, 327, 577. 



Degree, on Fernel's measure of a, 445. 



Delalande (M.) on the action of potassa 

 on camphor, 47. 



De Morgan (Prof.) on Fernel's measure of 

 a degree, 445. 



Deville (M.) on oil of turpentine, 187. 



Diffraction, on phaenomena of, 151. 



Disc, circular, on the phaenomena of dif- 

 fraction in the shadow of a, 153. 



Dulong(M.)on the quantity of heat evolved 

 in chemical combination, 19, 178. 



Dumas (M.) on the chemical statics of or- 

 ganized beings, 337, 456. 



Durocher (M.) on the polished rocks of 

 Fontainbleau, 409. 



Draper (Dr.) on some analogies between 

 the phaenomena of the chemical rays, 

 and those of radiant heat, 195. 



Egerton (Sir P. G., Bart.) on the occur- 

 rence of triassic fishes in British strata, 

 522. 



Electric and nervous influences, analogy 

 between the phaenomena of the, 31. 



Electric fluid, perforation of non-conduc- 

 torsby the mechanical action of the, 245. 



Electric thermometer, on an, 391. 



Electrical apparatus, on an atmospheric, 

 246. 



Electrical Society of London, 87, 245, 

 327, 404. 



Electricity : — of effluent steam, 25, 88 ; 



perforation of non-conductors by the ^ 



mechanical action of, 245 ; the effects 

 of vegetable points on free, ib. ; heat 

 evolved by metallic conductors of, 260 ; 

 experiments in, 374 ; conversion of the 

 bisulphuret of copper into the sulphuret 

 by, 443. 



Electro-gilding and electro-plating, 328. 



Electrolysis, heat evolved during, 265. 



Electro-magnetic machine, on a new, 246. 



Electro-metallurgy, 452. 

 Electro-nitrogurets, 97. 



Electrotype manipulation, 246. 



Elements of Chemistry, noticed, 237. 

 Erdmann (M.) on the products of the de- 

 composition of chloride and bichloride 

 of isatin, 192. 

 Espy (J. P.) on the course of the diurnal 



fluctuations of the barometer, 590. 

 Essay on Single Vision, noticed, 86. 

 Euchronic acid, 43. 



Everest (Lieul.-Col.) on a method of di- 

 viding one circle by copying from ano- 

 ther previously divided, 325. 



