INDEX. 



Thomf5on, Dr. 193, 2^8 

 Thompson, Mr. ^. T. 343 

 Thunder-storms oil the 19th August, 62 

 Tilloch, Mr. 35 



Timber, causes and prevention of de- 

 cay of, 287 

 Tobacco, empyretimatic oil of, experi- 

 ments with, 302, 335 

 Traill, Dr. on the migration of s^vallows, 



213 

 Trees, mode of packing for exportation, 



339 

 Trembley, M. 217 

 Trommsdorff, M. 293 



Vapour, natural history of, 48— Produc- 

 tion and transmission of sound in, 1 69 

 Vauquelin, M. 10, 156, 293, 351— His 

 chemical examination of a white fila- 

 mentous substance, found in the, ca- 

 vities of the cast iron that adheres to 

 the sides of high furnaces, 74 — Mis 

 examination of zeolite, 133 — On the 

 acid phosphate of potash, 238— His 

 experiments on some preparations of 

 gold, 248— On human bones, 256— 

 On mixtures of sulphuric acid and 

 water, 319 — On amer, 356— On the 

 analysis of hedge hyssop, 365. 



Vegetable poisons, 295, 324 



Vegetable substances, dessiccation of, 

 193 



Vegetables, see Plants 



Vegetation, its action on water, 72 



Vergi.e, M. his analysis of the mineral 

 ■water of St. Felix de Bagnere, 79 



Vibrations of sound, 321— See Sound 



Vitalis, M. 239 — On the amalgam of 

 mercury and silver, called arbor dimKB, 

 1^6 



Yogol, M. 379 

 Volatile acid, see Acid 



Upas of Java, experiments with, Sf/ 

 Ussat, mineral waters of, analysed, 7^ 



W. 



Washing roots, machine for, 336 

 Waste lavid rendered valuable, 273 

 Water, how affected by vegetation. It 



—Decomposed by galvanism, 183 

 Water, mineral, of Bagnere, analysis of,. 

 79— Of Ussat, 79— Of Niederbrunn, 

 80 

 Water-colours, improvement in, 33 

 Waters, distilled, mode of preserving, 



379 

 Weather, indications of changes of, 

 from observation of^ the clouds, 35,— 

 62 

 Welther, M. on amer, 351, 56^ 

 W. H, B. inquiiy from, relative to the 



economy of ants, 10 

 White, a beautiful and permanent, for 



water colours, 3S 

 Windows, sashes of, constructed so as 

 to be capable of being cleaned within- 

 side of the house, 129 

 Woodhood, Mr. J. 341 

 Woorara, experiments with, to ascertain 

 the action of its poison, 324, 332— 

 Results, 335 



X. 



Xanthorrosa, of Nc 

 tion of, 310 



Holland, descrip- 



Zeno, answer to, 93 

 Zeolite, composition of, 135. 



ERRATA. 



74 Note, /or xxvii, p 192, reed Ixxiii, p, IGft, 

 127 line bfor H.J. B. read H. T. B. 

 156 Note, for Ixii, read Ixxit. 



END OF THE THIRTIETH VOLUME, 



Stratfwrd, Printer, Grown Court, Te-mple iiar. 



