INDEX. 405 



Chlorides of potiissium and sodium, analysis of the mixtures of, 

 367, 368 — Of silver, on the decomposition of, by hydrogen 

 and zinc, 374, 375. 



Cinchona, effects of, 182, 183 — Notice of it, in its wild state, 

 272. 



Cinnabar, (native) notice of, 357. 



C/?/de, (river) list of steam-boats actually plying on, 2-11, 242. 



Coaches, number of, that daily leave London, 243. 



Coal, analyses of, 163, 164. 



Coal Tar, observations on a substance produced during the dis- 

 tillation of, 287-290. 



Colours of metals, when heated, researches on, 362-366, 



Comets (new) notices of, 151, 152. 



Commerce of Mecca, 47-50. 



Copper, hydrated carbonate of, 382. 



Copper and Silver, oxidation of, 168-170. 



Copying Machine, substitute for, 346. 



Cornwall, Geological Society, report of, 354, 355. 



Cvpapuy, (a Capuchin mission in Spanish Guayana,) plan of, 

 274— Description of it, 275. 



D. 



Daniell, (J. F. Esq.) on a new Hygrometer, which measures the 

 force and weight of aqueous vapour in the atmosphere, and 

 the corresponding degree of evaporation, 298 — Manner of 

 using the instrument, 301-305 — Tables of the force, density, 

 and expansion of aqueous vapour at different degrees of tem- 

 perature, from 0° to 92°, 306-308 — Observations thereon, 

 308-311 — Table of the force of vapour, and the full evapo- 

 rating force of every degree of temperature, from 28° to 85°, 

 311-314_Observations thereon, 314-321— Table of the re- 

 sults of the foregoing tables, 322 — Application of this Hy- 

 grometer to barometrical measurements, 323-325 — Meteoro- 

 logical Journal, with the Hygrometer, 326-336. 



Day, invariable duration of, demonstrated, 113, 114. 



Dead Sea, Analysis of the water of, 164, 165. 



Delphine, a new vegetable alkali, account of, 165, 156, 157. 



Derbyshire, notice of the mineral productions of, 349, 350. 



Differential Thermometer, described, 218-220. 



Donovan, (Mr.) experiments of, on the compounds of mercury, 

 358-360. 



Douglas, (Sir Howard) observations on M. Carnot's Theory of 

 Defence by Vertical Fire, 290-295. 



Dry Rot prevented, 348. 



E. 



Earth, influence of the changes of, on the latitudes of places, 85. 

 — Observations on the figure of, 108-114. 



