it 



e 



450 



INDEX. 



Telescopes achromatic, observations on, 

 106,309 



, new method of measuring 



their power, 162 



Temperature, differences of, 16 — appli- 

 cation of a high one to the evaporation 

 of liquids, 172 



Tetrapoda, meaning of the word, 336 



Thenard, M., on the preservation of 

 butter^ 170— alluded to, 276 



Thermometer, mercurial formula for re- 

 ducing, 167 



Thomson, Dr. A. T., on the efficacy of 

 bark,316,319 



his experiments on indigo,268 



Thorina, a new earth, discovery of, 412 



Thorite, analysis of, 297 



Tin, alloys of, 185 



Tobacco, investigation of, 417 



Towns, large, noxious atmosphere of, 67 



Turkish, filthy state of, 124 



Townshend, Lord John, anecdote of, 145 



Transition-rocks, 40 



Trap, its presence in Arran, 263 



Trees, petrified, in the isle of Portland,435 



Trembley, observation of, 283 



Tremellae described, 284 



Tristran, Count de, on the progress of 

 storms, 214 



Turkey, travels in, reviewed, 113 



Turner, Dr., on mixed gases, 354 



Turpin, M., on the system of M. Gaillon, 

 207 — on the nature and character of 

 robts, 423 



Tussilago /cagrans, power of, 59 



Ude, works of, 137 



Ultramarine, artificial, production of, 



182, 412 

 Unguipedates, their characteristics, 343 

 Ure, Dr. Andrew, on some pharmaceuti- 

 cal preparations of iron, 388 

 Urea, preparation of, 418 

 Urinary disorders, treatise on, 235 



Valz, M., on a new method of measuring 

 the power of telescopes, 162 



Van der Boon, Mesch, A. H., 197 



VanMons,M.,onsulphuretofsilicium,181 



Varvicite, 421 



Vauquelin, M., observation of, 182 — 

 process of, 187 — on pectic acid, 189 — 

 on the formation of acids, 191 — his 

 analysis of the Ipecacuanha Branca, 194 



Vegetables, formation of acids In, 191 

 — useful properties of, 308 — active 

 principles in, 323 



Vegetable-physiology, curious pheno- 

 menon in, 425 



VegetaIs,adumbrationsofastomachin,279 



Vegeto-alkalies, new, obtained from cin- 

 chona, 417 



Venables, Robert, on siliceous gravel, 

 234 



Vermin, destruction of, in ships, 169 



Vessel, sailing qualities of one, 221 



Vignal, M., 436 



Violet ray, its magnetic influence, 402 



Vogel, M ., on the decomposition of sul- 

 phates in water, 180 



Voltaism, carburet of sulphur decom- 

 posed by, 409 



Voss, M., experiments of, 211 



Walker, Mr., his instantaneous light ap- 

 paratus, 180 

 Walls, mode of cultivating plants in, 53 

 Wasp, vegetating, of Guadaloupe, 437 

 Water, running, force of, 162 — decompo- 

 sition of sulphates in, 180 — thawing 

 power of a small stream of, 433 



cresses, dangerous plant growing 



among, 427 

 Watt, Mr., experiments of, 251 

 Werner, on the classification of rocks, 37 

 Wiegmann, M., on the influence of che- 

 mical solutions on plants,, 212 

 Winter garden, want of, in England, 70 

 Woehler, M., experiment by, 178 

 Wollaston, Dr., on a method of rendering 

 platina malleable, 97 — catalogue of his 

 works, 152 

 Worari and Sirvatan, remarks on, 50 



Yarrow, analysis of the flowers and leaves 



of, 195 

 Yellowley, Dr., 234 

 Young, Dr., catalogue of his works, 154 



Zantedeschi, Professor, on the magnetic 

 influence of the violet ray, 402 



Zenneck, Professor, on a new method of 

 analyzing alloys of copper and silver, 

 412 



Zinc plate, form of, 72 



Zuber, M., process of, 182 



END OF SECOND PART FOR 



London : Printed 1>y W. Clowes, Stamford-Street, 



