African Cold Bokkeveld meteorite, notice of, xl, 199. ---- dialects, _J. W. Gibbs_, xxxviii, 41; xxxix, 255. _Afzelius_, obituary notice of, xxxiii, 211. _Agardh's_ Systema Algarum, announced, ii, 363; iv, 200. Agaric mineral in N. York, xxv, 347. ---- ----, in Vermont, iii, 234, 242. _Agassiz_ on fossil fishes, notice of, xxviii, 193; xxxiv, 212; abstract of, xxx, 33. ----, on the freshwater fishes of Central Europe, xxxix, 390; xlv, 211. ----, on the echinodermata, noticed, xxxiv, 212; xxxvii, 369; xlii, 378; xlv, 399. ----, glaciers and bowlders in Switzerland, xli, 59, 190. ----, former existence of glaciers in Scotland, xli, 191. ----, glacial theory of, xlii, 346.^f ----, visit of, to Mantell's Museum, xxviii, 194. ----, Wollaston medal awarded to, xxx, 382. ----, notice of the several works of, xli, 194. Agate, in Canada, viii, 64. ----, in Connecticut, i, 134; v, 44, 45; vi, 216. ----, in Massachusetts, i, 113, 115; v, 407; vi, 52. ----, in New Jersey, i, 236; ii, 197; v, 239. ----, in North Carolina, v, 261, 264. ----, in Rhode Island, ix, 46. ----, in the Western States, i, 132; iii, 71; vii, 49. ----, cause of red color of, xxxvi, 207. ----, coralline, in the West Indies, i, 141. Agave plant, and cordage from its fibre, xxi, 32. ---- and other plants used for cordage, _J. Mease_ and _H. Perrine_, xxv, 330. Agricultural chemistry, remarks on, xli, 262. Agriculture, rotation of crops in, _M. Macaire_, xxiii, 138. _Aikin, W. E. A._, notices of the country between Baltimore and the Ohio river, xxvi, 219.^f ----, apparent diminution of weight in some circumstances, xxvii, 224. Air, on the color of, by _Count Xavier de Maistre_, xxvi, 65. ----, currents in, see _Winds_. ----, temperature of, see _Meteorology, Heat_ and _Temperature_. Airpump, new, _J. H. Patten_, viii, 143.^f ----, remarks upon, with suggestions, _J. F. Dana_, viii, 275.^f ----, Patten's, remarks in reply to _J. F. Dana_, ix, 92. ----, new, _M. Thilorier_, xxiv, 379. ----, a new construction, _R. Hare_, xxxiii, 237.^f ----, improved, _J. Johnston_, xxxiv, 86.^f ---- receiver, improved, _J. Bell_, xxviii, 353.^f _Akerly, S._, on the language of signs, viii, 348. Alabaster (gypsum) of the Mammoth Cave, Ky., xlii, 206.^f Alasmodonta and Unio, on the genera and species, _D. H. Barnes_, vi, 107^f, 258.^f ----, descriptions of some, xiv, 289; xxv, 341.^f ----, see farther under _Zoology, Mollusca_. Albite, a distinct species from feldspar, vii, 390. ---- of Chesterfield, Massachusetts, analysis of, xxx, 381. Albumen, precipitated by phosphoric acid, xvi, 396. ----, solubility of, _A. Wurtz_, xlviii, 184.