INDEX TO VOLUME XIX. 



A. 



Academy of Natural Sciences of Phila- 

 delphia, notice of, 88, 355. 



Adulterations in chemical substances and 

 medicines, 70. 



Aix waters, sulphuric acid from, 176. 



Albany Institute, transactions of, 173, 360. 



Alcohol, impurities in, 71. 



Aldebaran, occultation of, 169. 



Almond, bitter, 384. 



American Annals of Education, &c. 174. 

 steel, 175. 



Ammonia, impurities in, 72. 



Animals, rules for the preservation of, 

 in Nat. Hist., 52. 



Annals of education and instruction, 357. 



Anthophyllite, hydrous, of Dr. Thomson, 

 859. 



Anthracite region In Pennsylvania, 1. 



Aqueducts, Roman, 389, 



Aranea aculeata, 61. 



Arsenic, tests for, 339. 



Arrow root, impurities in, 72. 



Arts, Chemistry of, 362. 



Aurora borealis, essay upon, 235. 



B. 



Barley sugar, crystallization of, 177. 



Barn Swallow, 172. 



Bedford and Bath springs, (Pen.) 97, 204. 



Beet sugar, 203. 



Bertero, Dr., on the plants of Chile, 63, 



299. 

 Binomial theorem, demonstration of, 50. 

 Birds, preservation of, in Nat. Hist. 52. 

 Blasting rocks, 199. 

 Blood, coloring matter of, 381. 

 Boring for salt water, 203. 

 Bottles, strength of, 196. 

 Bowditch, N., translation of the Mecan- 



ique Celeste by, 202. 

 Bromine, atomic weight of, 383. 



— discovery of, in the Baltic, 382. 



Brown, J. B. on a singular impression in 



marble, 361. 



Brown, Lt. on the relative strength of 

 certain kinds of timber, 228. 



c. 



Calomel, impurities in, 72. 



Camphor, 380. 



Caoutchouc, method of working, 193. 



Cast steel, fabrication of, 284. 



Cement from iron filings, 190. 



Central forces, 46. 



Chart of Long Island Sound, 163. 



Chemistry, elements of, a new work, 343. 



Chemistry of the arts, 362. 



Chile, on the plants of, 63, 299. 



Chimnies, mode ^{ extinguishing, 186. 



Chloride of lime in U. S. Navy, 164. 



bleaching rags, 166. 



, disinfecting powers of, 



177. 



Chloride of soda, use of, 363. 



Chlorine, phosphorus and sulphur, anew 

 compound of, 382. 



Chromate of lead, impurities in, 73. 



Clemson, T. G., on the Hartz, 105. 



Coal measures in New York, 326. 

 Pennsylvania, 21. 



jCoal mine on fire, 386. 



Common salts, detection of impurities in, 



! 178. 



'Comstock, Dr. on explosions in blasting 



I rocks, 199. 



Comstock, Dr. on the steam boiler, 176. 



Copaiva, impurities in, 73. 



Crystallization, tendency of salts to, 381. 



Cuvier, Baron, memoir of Count Rum- 

 ford by, 28. 



D. 



Darlington, Dr. notice of the Encyclope- 

 dia of plants by, 160. 



Decrepitation of common salt, 198. 



Diamond mines in Russia, 199. 



Disinfecting powers of Chloride of Lime, 

 177. 



Dy.^pepsia, Prof. Hitchcock on, 167. 



Dix, Miss, on Aranea aculeata, 61. 



