136 INDEX. 



dients of minerals Ly the oxygen, which they do not contain, 

 238 



Minerals, instrument for distinguishing, v. 139 



— double refraction of, x. 168. xi. 199 



— pyro-electricity of, xiii. 430 



■ new fluid discovered in the cavities of, xv. 375. Ex- 

 istence of bitumen in, 3S9 



' (new), found in Mount Vesuvius, xvii. ISO 



— extraordinary, discovered at Warwick, Orange County, 



New York, xx. 186 

 Mineral substance (new), notice of, xii. 191 



■ on the existence of iodine in, xx. 173 



Mineral Waters (artificial) mode of preparing, observations on 



the analysis of, x. 217. Tests and apparatus required for, 218. 



Examination of by tests, 219. Analysis of, 222 



• on the sulphureous nitrogen in, xii. 409 



(thermal), of St. Nectaire, analysis of, xiii. 396. 



Of Montd'Or, 417 

 (sulphureous), mode of estimating the quantity of 



sulphuretted hydrogen gas in, xiv. 445 



presence of iodine discovered in, xvii. 180 



analysis of those in Windsor Great Park, xx. 264 



Mineral and Mosaical geologies, comparative estimate of, xv. 108 



Mines of tin in the Isle of Banca, notice of, ii. 191. Of lead at 

 Dufton, in Westmoreland, geological account of, 198 



observations on the temperature of, vii. 401 



Mining intelligence, vi. 345 



Mint (Roman), notice of, xi. 411 



Minutes, table of equivalents, for converting into space, xiii, 394 ; 

 and into time, 395 



MiRBEL (M.), general views of vegetable nature by, ii. 35. De- 

 velopment of the law by which different tribes of vegetables 

 are distributed over the globe, ih. Local circumstances, a 

 cause of the variation of temperature, 44. Effects of cold, 

 heat, and light, on vegetation, 46. Botanical researches in the 

 Pyrenees and Alps, 50 ; and in America, 52. On the growth 



