_Ores_, or _Metals_. ----, artificial, sulphate of lime with half an atom of water, _J. F. W. Johnston_, xxxv, 300. ----, ----, produced by heat, x, 190. ----, ----, oxide of iron about furnaces, xxxvi, 237. ----, ----, feldspar, xxviii, 396. ----, cabinet of, given by Baron de Schutz to the school at Landshut, v, 193. ----, ----, a large, for sale, ii, 169. Mineral resins from peat mosses--Tekoretin, Phylloretin, Xyloretin, Balloretin, _G. Forchhammer_, xli, 402. ---- springs, see _Springs_. ---- veins, remarks on, with the views of _R. W. Fox_, xxxiii, 93; _I. Fournet's_ views, 94. ---- ----, questions on, _R. W. Fox_, xxxiii, 135. ---- waters, artificial, _S. Morey_, iii, 94. ---- ----, native, see _Springs_. ---- wax, a new species, _M. Prinsep_, xviii, 165. Mineralogical hammer, new, _E. Hitchcock_, vii, 175.^f ---- systems, W. Whewell on, xliv, 214. Mineralogy, _P. Cleaveland's_ Treatise on, noticed, i, 35. ----, ----, ibid, 2d edition announced, v, 404. ----, review of _C. U. Shepard's_, xxii, 395; xxviii, 374; xlvii, 333. ----, ibid _F. Alger's_, xlvii, 333. ----, ibid _J. D. Dana's_, xxxii, 387; xlvi, 362.^f Mining company, the Muskingum, xxv, 224. ---- industry of Spain, _F. le Play_, xxviii, 17. Mint, projected branch, of North Carolina, xx, 401. ----, gold coinage, amount of, in the United Stales, xx, 403. ----, amount of gold deposited at, xx, 404. Mirror, metallic, found by the precipitation of silver from the oxide, xlix, 398. Mississippi, mounds of, _R. C. Taylor_, xxxiv, 97. ---- valley, _L. Bringier_, iii, 15; --banks of the Mississippi, 16; driftwood of the Achafalaya, Red river, 17; earthquakes and eruptions, 20; fossil remains of mastodon, 22; marble and other mineral productions, 23. ----, ----, _L. Bringier_, lead mines, iii, 24; iron ores, 26; cove of Wachitta, 26, 28; alum slate, 28; salt, sandhills, 27; hot springs of Wachitta, 29; Indians, 30; mounds, 36. ---- ---- and the lakes, _J. B. Gibson_, xxix, 201. ---- ----, _H. King_, xlvii, 128. ---- ----, lower part of, _R. Nutt_, xxiii, 49. ----, mineralogy and geology of, _E. Cornelius_, i, 317. ----, Upper, polythalamia of, _J. W. Bailey_, xli, 400. ---- river, elevation of banks of, 1811, _F. C. Usher_, xxxi, 294.^f ---- ----, velocity of, vii, 174. ---- ----, headwaters, botany of, _D. B. Douglass_ and _J. Torrey_, iv, 56. ---- waters, medical effects of, viii, 396.