INDEX. 



Stnith, Mr. E. on ilic manufacturing of 

 threacl, and articles resembling flax, 

 hemp, tow, and cotton, from the 

 fibres of the common nettle, l6l 



Sodalite, a new mineral, 2S5 



Sodi-sm and potassium, natureof, 35, 38 



Sounds, qualities of, 236 



Stahl's near discovery of the pure alka- 

 lis, 117 



Stings of insects and fishes^ means of 

 curing, 314 



Stratingh, M. on the combustion of 

 ether, metals, &c. in oximuriatic 

 gas, 140 



Strawberries, improved method of cul- 

 tivating, 214 



Sweiger, M. on tortoises, 240 

 T. 



Tarry, Dr. H. on the processes employ- 

 ed to cause writing to disappear from 

 paper, to detect the writing that has 

 been substituted, and to revive that 

 which has been made to disappear, 

 339— His improvement of common 

 ink, 341— Notice of a new ink, that 

 resists the action of chemical agents, 

 154, 343 



Taylor, Mr. J. his method of ventilat- 

 ing mines and hospitals, by extract- 

 ing foul air from them, 330 



Tlienard, M. see Gay-Lussac. 



Theory and Hypothesisy Remarks on the 

 meaning of the terms, and their dif- 

 ference, 144 



Thompson, Mr. James, his analysis of 

 the sulphate of harytes, 225 



Thomson, Dr. Thomas, on allaaite, 47 

 —On sodalite, 285 



Thistles, description of an implement 

 for destroying, 301 



Thrashing machine, an improvement 

 in, described, 274 



Thread manufactured from the fibres of 

 common nettles, 161 — From those of 

 the bean stalk, 278 



Tin, its combustion in oximuriatic gas, 

 140 



Tobacco, analysis of, 153 — PeouBaf 



principle in, 153 

 Tortoises, new species of, 239 

 Tow, made of the fibres of nettles, 161 



— Of the fibres of bean stalks, 278 

 Trees, buds of, their formation and 



growth, 1.— Cause of death in, 6— 



Various juices of,8, 12— Fir tribe, 202 

 Turquoises, artificial, 154 



Vauquclln, his analysis of tobaccos 

 and belladonna, 153— On the de- 

 leterious effects of the juice of dead- 

 ly nightshade, 514— On the analys>is 

 of an ancient bell, 315 

 Ventilation of mines and hospitals, 330 

 Vines, see Grape house.— Composition 



to stop the bleeding of. 111 

 Volcanoes, extinct, in France, 311 

 Voltaic battery, ratio of its power of ig- 

 niting wires, 81 



U. 



Upas, poison of, experiments on, 314 



W. 



Water decomposed by the diamond, 79 



Water pipes of iron, 136 



Wernerian Natural History Society^ 



proceedings at its sessions, 152, 235 

 Wilkinson,Dr. on the ratio of the p©wer 



of ignition in the voltaic battery, SO 

 Wine, distillation of, 154 

 W. N. on conductors for lightning, 309 

 Wollaston, Dr. his experiments on al- 



lanite, 48, 55— On sodalite, 286 — His 



Swedish natrolite probably the sam« 



as Werner's fettstein, 287 



Yvart, M. on the means of improving 



agriculture by rotations of green 



crops, 314 



Z. 

 Zebra, offspring of, by a male ass, de« 



scribed, 127 

 Zeno, on Mr. Moore's paper on the mo' 



tion of Rockets, 384 



END OF THE TWENTY- NINTH VOLUME, 



Stratford, Frmter, Crown Court, Temple bar. 



