Metalliferous veins, course of, and origin, _R. W. Fox_, xxxi, 373. ---- ----, electro-magnetic properties of, xx, 136. Metamorphic changes at the Lipari Islands, xxxiii, 77. ---- agency, as indicated by certain crystals in some rocks in N. York, &c., _L. C. Beck_, xlv, 143; xlvi, 333. ---- changes in iron ore by trap dikes, in Nova Scotia, xv, 212. ---- ---- by artificial heat in a sandstone, _E. Emmons_, xlv, 146. ---- ---- by heat, through the medium of heated water, _J. D. Dana_, xlv. 104. ---- ----, by dikes, _J. D. Dana_, xlv, 113. ---- origin of granite, _R. H. Bonnycastle_, xxx, 245. ---- granite, _J. D. Dana_, xlv, 108. ---- limestone, Carrara marble an instance of, xxx, 176. ---- limestones, Maine, _C. T. Jackson_, xxxvi, 146. ---- rocks of N. Hampshire, notice of, _C. T. Jackson_, xlv, 145. Metamorphism, related to pseudomorphism, xlviii, 92. ----, heated water an agency in, _B. Silliman_, xliii, 247. Meteors, instances of some remarkable, _D. Olmsted_, xxvi, 133. ---- seen in Canada, April, 1840, xxxix, 383. ---- seen in Connecticut, Dec. 14, 1837, _E. C. Herrick_, xxxvii, 130. ---- ---- ----, at New Haven, March, 1813, _S. E. Dwight_, xiii, 35. ---- ---- ----, at New Haven, March 31 and April 1, 1826, _A. C. Twining_, xi, 184. ---- ---- ----, at New Haven, May, 1840, xxxix, 382. ---- ---- at Boston and N. Haven, in Nov., 1841, xliii, 399. ---- ---- in England, Nov. 26, 1758, xxxv, 231. ---- ---- ----, August 18, 1783, xxxv, 231. ---- ---- in Greece, xxxix, 381. ---- ---- in Illinois, in day time, Aug. 20, 1836, xxxiii, 402. ---- ---- in Maine, Aug. 7, 1823, vii, 170. ---- ---- in Massachusetts, near Boston, October, 1689, xliii, 399. ---- ---- in New Hampshire, at Rochester, 1837, xxxiii, 200. ---- ---- in New York, of a green color, Feb. 11, 1828, _B. D. Silliman_, xiv, 199. ---- ---- in North Carolina, at Fayetteville, xlix, 408. ---- ---- in Vermont, at Burlington, April 14, 1826, _G. W. Benedict_, xi, 120. ---- ---- in West Indies, at Antigua, xxxix, 381. ----, combustible, in Moscow, March, 1832, xxvi, 134. ----, gelatinous, account of, ii, 335. ----, ----, _E. Hitchcock_, xxv, 362. ----, ----, in 1718, in India, xxvi, 133. ----, ----, in 1796, in Lusatia, xxvi, 133. ----, called inflammable snow, _Hermann_, xxviii, 361. ----, mucilaginous, xlvii, 197. ----, theory of, _W. G. Reynolds_, i, 266. ----, see farther, _Shooting star_.