INDEX. 467 
Tread-wheel, application of, to canal navigation, 431 
Tredgold (Mr.), on the strength of cast-iron, 223’; his work 
commended, 224 
Trifolium Incarnatum, recommended to agriculturists, 452 
Trusses, improvement in, 433 > 
Tunbridge-Wells, hints on a mode of procuring soft water at, 
345—348 
Turmeric Paper, action of salts on, 234: 
Tutenag, analysis of, 232 
Uranium, experiments on the oxides and salts of, 86=-91 ; phos- 
phoric acid found in the green ore of uranium, 453 
Ure (Dr.) on the ultimate analysis of vegetable and animal sub- 
stances, 388—391 
Vaccination, benefits of, 453 
Valetudinarians, remarks on the diet of, 367, 368 
Vapour, researches on the temperature of, as well as on the 
temperature produced by vapour, 439, 440 
Vauban (M.), anecdote of, 221 
Vauquelin, (M.) on the combination of acetic acid and alcohol 
with volatile oils, 425—427 
Vegetables, on the existence of sulphur in, 234; ultimate ana- 
lysis of vegetable and animal substances, 388—391 ; the in- 
fluence of motion in the direction of vegetables, 450—452 
Velocity of sound, results of experiments for determining, 433 
Verdigris, analysis of, 228 
Vesuvius, notice of an eruption of, 236; electric experiments 
on Vesuvius, in June and July 1819, 333, 334 
Volatile Oils, experiments on the combination of acetic acid 
and alcohol with, 425 —427 
Volcanoes, geological remarks on the actions of, in producing 
certain elevations of land, 262—295; observations on the 
volcanoes of Sicily, 322—324 
Vulliamy (B. L.) improved method by, of constructing the dead 
escapement for clocks, 334 —340 
Walls, mode of preventing the effect of damp on, 433 
Warra, an inland kingdom of Africa, notice of, 4 
Water, action of, on metallic arsenic, 233; on the effects of 
boiling water, 237, 238 
Watering-places, remarks on, 363, 364 
Wells of London, account of, 145, 146 
Welter (M.) on the laws of the propagation of heat, 207 
Wine, improved by chalk, 227. 
