204 INDEX. 



Urns, ancient funereal, discovered, vi. 176 

 Useful arts, connexion of, with the sciences, illustrated, vii. 215 

 Utero gestation, observations on the period of, ii. 43. English 

 law on this point, 44 



Vaccination, discovery of, modestly claimed by the French, ii. 169 



a supposed remedy for the plague, vi. 379 



a cure for the hooping-cough, xiii. 441 



benefits of, xiv. 453 



Vacuum, effect of, on alkaline carbonates, xv. 383 



Valais, devastation of, by inundation, described, vii. 166 



Valenzuelia, genus, notice of, iii. 128 



Valetudinarians, remarks on the diet of, xiv. 367 



Valley of Egypt, notice of a memoir on, iv. 98 



Valleys of Cucuta, in South America, description of, iii. 337 



Vapour of sulphuric ether, effects of inhaling, iv. 158 



(aqueous), table of the force, density and expansion of, 



at different degrees of temperature from 0° to 92*^. viii. 306. 

 Observations thereon, 308. Table of the force of, and the 

 full evaporating force of every degree of temperature from 

 20° to 85°, expressed in grains of water that would be raised 

 per minute from a vessel of six inches in diameter, supposing 

 that there were no vapour already in the atmosphere, 311. 

 Observations thereon, 314. Table of results, 322 

 researches on the temperature of, as well as on the 



temperature produced by vapours, xiv. 439 



experiments on the density of, xv. 297 



(metallic), method of condensing, xviii. 270 



increased production of, xix. 148 



Variation transit, directions for making adjustments on, v. 207 ; 

 and for using it, 209 



of the compass, notice of several unsuccessful attempts 



to ascertain, iv. 102; and of the different changes to which 

 the magnetic needle is subject, 104. Pangerous consequences' 



