8 INDEX. 



America, botanical researches of MM. Humboldt and Bonpland 

 in, ii. 52-54} 



(North) geological divisions of, iii. 84, 85 



• ravages of locusts in, vi. 102. Account of an Ameri- 

 can sea-serpent, 163-164. Notice of ancient coins disco- 

 vered in, 180. Account of a water-burner invented in, 367. 

 Meteoric iron found in North America, 369 



notice of a scientific excursion in, vii. 198 



scientific expedition into the interior of, viii. 188. 



Description of Indian antiquities there, 224-232 



antique silver cup, found in, ix. 210 



statistics of, x. 203. Census of, 432 



— — tyrant shrikes of, observations on, xx. 267-285 



Amethyst, globules of water found in, xx. 187 



Amici, (Prof.) account of some optical inventions by, xii. 398-401 



• abstract of the microscopical observations of, xvi. 388-393 



Ammonia, observations on the solution of silver in, iv. 268-273 

 combinations of with chlorides, v. 74-77. A specific 



remedy for the bite of an adder, 141. On the oxide of silver 



by ammonia, 368, 369 



i lampate of, vi. 321 



— experiments on the carbonate of, vii. 294-296 



Ammonia, formation of, ix. 182. Notice of calculi, composed of 

 urate of ammonia, ix. 405-406 



. solution of oxide of copper in, xiii. 226 



— (bi-phosphate and bin-arseniate of,) on the relation 



between the crystalline form and chemical proportions of, xiv. 203- 

 204. And of the arseniate and phosphate of ammonia, 204-205 



, — muriate of, from coal strata, xv. 169-170. Discovered 



in lava, 169 



experiments on a per-sulphate of iron and, xv. 381, 382 



on the presence of, in the rust of iron formed in houses. 



xvi. 380, 381 



. — and carbon, re-action of the sulphuret of, and on the 



combinations thence resulting, xviii. 149-155 



the oxalate and formiate of, converted into liydrocy- 



anic acid, xviii. 397 



