Minerals, new fluids in cavities of, detected by _D. Brewster_, xii, 214. ----, optical structure of, ix, 384. ----, specific gravities of various, _Breithaupt_, xxxi, 268. ----, Hosack's donation of, iv, 396. ----, pseudomorphous, account of, xlviii, 66, 81. ---- of trap, origin of, _J. D. Dana_, xlix, 49. ---- of volcanic rocks, iv, 212, 215. ----, zeolitic, not formed at the formation of the containing rock, _J. D. Dana_, xlv, 116, 145. ----, ----, rendered hydrous bysteam of eruption, _H. D. Rogers_, xlv, 147. ----, in London, prices of, v, 169. ---- of Europe, value of, xxix, 368. ---- of North America, their analogy with those of northern Europe, _W. Meade_, xii, 303. ----, _Foreign_. ---- of a cavern, upon Bosjesman river, southern Africa, xxviii, 290. ---- of Ceylon, vi, 192. ---- of Greece, xxxiii, 207. ----, oriental, from Sardis, _F. Hall_, xxxiii, 249; Pergamos, 250; Smyrna, 250; Ephesus, 251; Thyatira, 251; Samos, 252; Syra, 253. ----, ----, _Robertson_, xxxiii, 255. ---- found in the Hartz, xix, 112. ---- of New Holland, _F. Alger_, xxxix, 157.^f ---- from Palestine, ix, 337; x, 21. ---- of Peru, San Lorenzo, selenite, calc spar, &c., xxxviii, 201. ---- of Sicily, viii, 203. ----, saline, of the plains of Tarapaca, _J. H. Blake_, xliv, 2. ---- of Vesuvius, account of, from _Monticelli's_ treatise, xii, 185. ----, _North American_. ----, ----, proposed as new, shown to be identical with other species previously known, xlvi, 384. ----, ----, in Alabama, _E. Cornelius_, i, 214, 317. ----, ----, in Canada, _J. I. Bigsby_, v, 205; viii, 60. ----, ----, of northern America, and the vicinity of Hudson's Bay, xvii, 12. ----, ----, of Nova Scotia, _F. Alger_, xii, 227. ----, ----, ----, _Jackson_ and _Alger_, xiv, 305; xv, 132, 201. ----, ----, ----, examined by a party from Williams College, xxx, 330. ----, ----, of Connecticut, Litchfield Co., gneiss range, _J. P. Brace_, i, 351. ----, ----, ----, New Haven and vicinity, _B. Silliman_, ii, 201. ----, ----, ----, _T. D. Porter's_ localities of, with a map, ix, 177. ----, ----, ----, various localities, _C. U. Shepard_, xxxiii, 155. ----, ----, ----, at Stonington, _W. W. Rodman_, xxxv, 179. ----, ----, of Delaware, x, 223. ----, ----, ----, _G. W. Carpenter_, xiv, 1. ----, ----, of Illinois, Shawneetown, i, 52; ii, 176; iii, 244, 367. ----, ----, of Indiana, _W. B. Stilson_, i, 131. ----, ----, of Kewenaw Point, Lake Superior, _C. T. Jackson_, xlix, 86. ----, ----, of Maine, Freyburg and Paris, xviii, 291. ----, ----, of Maryland, _G. W. Carpenter_, xiv, 1. ----, ----, ----, Baltimore and Harford Cos., _P. T. Tyson_, xviii, 78. ----, ----, ----, Bare Hills, _H. H. Hayden_, xxiv, 349.^f ----, ----, of Massachusetts, localities of, in part, _C. Dewey_, i, 337; viii, 1. ----, ----, ----, ibid, _E. Hitchcock_, i, 112, 201; vi, 201; vii, 30; xiv, 215.