Academy of Sciences of Philadelphia, history of, xlvii, 6. ---- ---- ----, notice of, viii, 399; xix, 88, 355; xxii, 183. ---- ---- ----, Journal of, when commenced, xix, 91. ---- ---- ----, notice of the Catalogue of the Library, xxxiii, 181. ---- ---- ----, _Dr. Burrough's_ collections, xix, 355. ---- ---- ----, _McClure's_ donation to, xxx, 187. ---- ---- ----, notice of Journal or Proceedings of, xx, 414; xxxix, 395; xlix, 183. ----, Maryland, of Science and Literature, xxx, 192, 395; xxxi, 395; xxxii, 204. ----, Delaware, of Natural Sciences, xxiv, 177. ----, St. Petersburgh, of Sciences, xx, 389; xxii, 203. ----, Stockholm, of Sciences, iv, 387. Acarus, _Crosse's_, xxxii, 374^f; xxxv, 125^f; xlix, 227. ----, experiments of _W. H. Weekes_, xliii, 395. ----, the supposed microscopic fungus, xliii, 205.^f Acetic acid, a new process for obtaining from alcohol, xxviii, 358. ---- ----, on crystallizable, _C. Despretz_, xxvii, 197. Achromatic microscope, improvements in, _E. Thomas_, xx, 265.^f Acid, acetic, new process for, from alcohol, xxviii, 358. ----, ----, on crystallizable, _C. Despretz_, xxvii, 197. ----, angelicic, xlvii, 196. ----, apocrenic, _Berzelius_, xxviii, 121. ----, argento-cyanic, xviii, 334. ----, aspartic, xvii, 173. ----, benzoic, xlix, 194. ----, of butter, volatile, _J. U. Lezch_, xlix, 202. ----, boracic, of Tuscany, ii, 349; xxviii, 143; xxxvii, 270. ----, ----, in the waters of Vulcano, ii, 349. ----, butyric, xlviii, 186. ----, carbonic, see _carbonic acid_. ----, chlorovinic, _A. A. Hayes_, xxii, 142. ----, chlorovinous, xxii, 142. ----, citric, from gooseberries, xvi, 385. ----, citricic, _S. Baup_, xxxiv, 206. ----, columbic, _A. A. Hayes_, xlvi, 166. ----, crenic, _J. Berzelius_, xxviii, 121. ----, cyanic, xvi, 258. ----, formic, see _formic acid_. ----, gallic, new process for, _E. N. Kent_, xlvi, 78. ----, hydriodic, preparation of, xvi, 383; xlvii, 192. ----, hydrobromic, xlvii, 192. ----, hydrochloric, experiments with reference to, _Macaire_ and _de la Rive_, xi, 393. ----, hydro-carbo-sulphuric, preparation of, vii, 187. ----, hydroxanthic, vii, 376. ----, iodic, xx, 185; xxviii, 136. ----, ----, combinations with vegetable alkalies, xix, 371. ----, kinic, detection of, _J. Stenhouse_, xlix, 391. ----, malic, _M. Liebig_, xxi, 156. ----, meconic, mode of obtaining, _R. Hare_, xii, 293. ----, metagallic, _M. Pelouze_, xxviii, 126. ----, muriatic, see _Muriatic_. ----, nitric, see _Nitric_. ----, opianic, xlvii, 196; xlix, 205. ----, opiano-sulphurous, xlix, 205. ----, oxalic, _Gay Lussac_, xxvii, 400. ----, phosphovinic, _M. Pelouze_, xxviii, 129. ----, prussic, see _Prussic_. ----, pyrocitric, vii, 187. ----, pyrogallic, _M. Pelouze_, xxviii, 126. ----, pyroligneous, ii, 340; v, 188; ix, 201; xiii, 175. ----, rosaic, in urine, xvii, 385. ----, saccharic, _M. Heintz_, xlviii, 193. ----, silicic, see _Silica_.