INDEX. 411 



List of those building, 153 — Account of the progress of steam 

 navigation in Great Britain, 240, 241, 242, 243 — List of steam 

 boats now plying on the river Clyde, 241, 242. 



Steam-Pits, for forcing plants, notice of, 340. 



Steel, Persian mode of making, 160, 161, 



Stomach, beneficial effects of the white oxide of bismuth, on a 

 severe disorder of, 295-298. 



Suicides, number of, in Paris, 189. 



Sun's rays, effects of, on magnetism, 383. 



Swayne (Rev. G.), on the importance of manufacturing British 

 opium, 234, 235 — Description of an apparatus for that pur- 

 pose, 236, 237— Instructions for it, 238, 240. 



Sweden, notice of the universities of, 1 89. 



Tar (coal), observations on a substance produced during the 



distillation of, 287-290. 

 Taylor's and Martineaus (Messrs.), apparatus for producing 



gas from oil, ^-c., described, 120-124. 

 Thenard (M.) observations of, on oxygenated water, 114-120- 



154, 155. 

 Thermometer (differential), description of, 218-220. 

 Thomsons (Dr.), mode of obtaining nickel, pure, 161, 162 — His 



analyses of coal, 163, 164. 

 Tinning, process of, 145-151. 

 Tin-plate, manufacture of, described, 141-151. 

 Titanium found in iron ore, 167. 

 Transit instrument, observations on stars with, 84. 

 Trees, mode of ingrafting, 154 — On the latitude of, in Sweden, 



173. 

 Turnips, lime a remedy for the fly in, 155. 



u. 



Ulmin, artificial, 392. 



Universities of Germany, notice of, 188 — and of Sweden, 189. 



Upata (a capuchin mission in Guayana), described, 269, 270 — 



State of the plantations in its vicinity, 271. 

 Uric acid, action of nitric acid, chlorine, and iodine, on, 157-159. 



Note on the animal substances which generally accompany 



uric acid in calculi, 370-373. 

 Urinary concretion, analysis of, 361. 



V. 



Vapour (aqueous), table of the force, density, and expansion, of, 

 at different degrees of temperature, from 0° to 92°, 30()-308 — 

 observations thereon, 308-311 — table of the force of vapour, 

 and the full evaporating force of every degree of tempera- 

 ture, from 20"^ to 85°, expressed in grains of water, that would 



