INDEX. 7 



Almonds, notice of a crystallized deposit in the oil of, xv. 376 



Alps, analysis of the red snow of, ix. 199-201 



Alsop (Mr.), method of, for secret writing, xix. 140. On the 



properties of Margosa oil, 162, 163 

 Alstenia Teiformis, account of, ii. 92. Experiments on by M. 



Palacio Faxar, 93. And by M. Faraday, 93, 94 

 Alta Gracifi (Capuchin mission of), notice of, ix. 24, 25 

 Altar (Roman), notice of, xi. 411 

 Altitudes, influence of different, upon vegetation in different zones 



of the earth, x. 262-26G 

 Alum, phenomena attending the process of solution of, i. 25, 26 



prepared from soda, vi. 363 



chemical analysis of, xi. 342. Found in decomposed mica 



slate, xii. 414 



analysis of, and number of alumina, xiii. 227 



formations, analysis, and uses of soda-alum, xiii. 276-278 



crystals, method of colouring, xiv. 445-446 



action of, on blue colours, xviii. 396 



• slate of Freinwald, analysis of, xii. 278-282 



stone of Tolfa, analysis of, xii. 277,278 



Alumina, fusion of, by the blow-pipe, ii. 110 



• new method of obtaining pure, iv. 387. Analysis of 



silicated hydrate, and siliceous sub-sulphate of, v. 139-140, 

 376 ; and potassa, analysis of the sub-sulphate of, xi. 3S9 



Alumina, analysis of the hydrate of, xiii. 436 



on a peculiar sulphate of, xiv. 435 



notice of native phosphate of, xv. 168. Of the native 



sulphate of iron and alumina, 389 



■ geological notice of, xix. 82-83 



Aluminite, component parts of, xi. 342 



Aluminous soap prevents the ravages of moths in cloths, xi. 



393 

 Amalgamation of nickel and cobalt by arsenic, xvi. 106 

 Amaria, genus, notice of, iii. 127 

 Amaryllis, genus, review of, ii. 342-371 

 Amber, on animals preserved in, xvi. 41-44, 393, 391-. Remarks 



on its nature and origin, xvi. 44-4S. 



