INDEX. 401 



Trees, the growth of, how promoted, 388 



Turnips, preservation of, 141 



Turpentine, succinic acid discovered in, 161 



U 



Uranite, analysis of, 168 



Ure (Dr.) mode of protecting the specula of reflecting telescopes, 

 52-54 



V 



Vacuum, effect of, on alkaline carbonates, 383, 384 



Vapours, experiments on the density of, 297 



Faria<2ore of thermometers, 160; 369 — 371 ; and of barometers, 



371, 372. 

 Vauquelin (M.) on a crystalline matter formed in a solution of 



cyanogen, 302, 303. Analytical examination of touchstone 



by, 315, 316. And of an aerolite, 316 

 Vegetation in atmospheres of different densities, experiments 



on, 388 

 Vesuvius, accountof the eruption of, in October 1822, 175 — 183. 



Notice of mesotype from, 389 

 Vibrations of heavy bodies, researches on, 90—103 

 Voltaic apparatus, new form of, 143 



W 



Ware (Samuel, Esq.) on the curvature of the arches of the 

 bridge of the Holy Trinity, at Florence, 1 — 8 



Water, hydraulic, instrument for raising, 137. Change of water 

 at falls, 172. Maximum density of water, 372. Action of 

 phosphorus on water, 383 



Wax, (virgin) analysis of, 384 



West (Wm. Esq.) analysis by, of a new sulphur spring at Har- 

 rogate, 82—89 



Wine, process for clarifying, 385 



Y 



Yeast, expeditious modes of making, 141 



Yeats, (Dr.) on a cure of an affection of the brain by cold, &c., 

 8—11 



Zeise (W. C.) experiments of, on the hydroxanthic acid, and 



some of its compounds, 304 — 309 

 Zinc, (sulphuret of) experiments on, 150 



