INDEX. 183 



Silver, principal mines of, iv. 243. Different kinds of, ih, 2ii. 



Its comp'ounds, ib. 245. Modes of extracting and assaying, 



245. Relative value of gold and, 240. Observations on the 



solution of, in ammonia, 268 



lampate of, vi. 322 



■ Persian mode of purifying, viii. 160. On the oxyda- 



tion of copper and, 168. On the decomposition of the chloride 



of, by hydrogen and zinc, 374 



economical preparation of the nitrate of, ix. 405. Gup, an- 



tique, found in North America, 210 



' • on the reduction of the chloride of, x. 453 



ore (red) of Peru, analysis of, xi. 273 



on the use of the nitrate of, in epilepsy, xii. 189. Expe- 

 riments and observations on the atomic weight of, 286 

 • new researches on the composition of the antimoniated 



sulphuret of, xiii. 416 



■ (fulminating) results of experiments on, xvii. 153 

 on a compound of cyanogen with the nitrate of, xix. 159 



Silvester (Mr.), account of his mode of warming and ventilating 



the Derby infirmary, xviii. 337, His method of condensing 



smoke described, 270 

 Sinumbra lamp, description of, x. 101 

 Siren, a new acoustical machine, described, ix. 175 

 Sirium, a supposed new metal, account of, vi. 112. vii. 291 

 Siveright's (Mr.), microscopes of glass, notice of, vii. 308. On 



the pyro-electricity of the tourmaline, 397 

 Size of the heavenly bodies, observations on the apparent changes 



in, x. 9 

 Skin, change of colour of, vi. 379 

 Skull of a deer found in a tree, notice of, xii. 193 

 Slates (artificial), mode of preparing, xiv. 432 

 Slaves, treatment and manners of, at Batavia, vii. 13 

 Sledge (Esquimaux), described, vii. 82 

 Sleep, observations on the cause of, vii. 238. Phenomenon of, 



255 

 Sleeping woman, account of an extraordinary, i. 121 



