_Maury, M. F._, description of an alembic for distilling amalgam of gold, xxxiii, 66.^f ----, on the gold veins of the U. States mine near Fredericksburg, Va., xxxii, 325. ----, on the navigation of Cape Horn, xxvi, 54. ----, on the Gulf Stream and currents of the sea, xlvii, 161. ----, instrument for finding the true lunar distance, xxvi, 63.^f _Meade, W._, mineral cabinet of, xxvi, 209. ----, on the coal near Tioga river, Penn., xiii, 32. ----, on the anthracites of Europe and America, xii, 75. ----, on the use of anthracite in the making of brick, xviii, 118. ----, mica for spectacle glasses, xviii, 374. ----, analogy of the minerals of northern Europe and N. America, xii, 303. ----, on the artificial preparation of medicinal waters, xxii, 126, 330. ----, on a now mineral spring near Albany, xiii, 145. ----, ibid, at Pittsburgh, xiv, 124. ----, analysis of Lebanon spring, xxxvi, 7. ----, idocrase in New England, vii, 50. Meal from leguminous fruits, vii, 189. _Mease, J._, on spontaneous combustion, xxxiii, 147, 199. ----, on bills of mortality, xli, 306. ----, on some of the vegetable materials from which cordage, twine and thread, are made, xxi, 27. ---- and _H. Perrine_, on the plants used for cordage, xxv, 330. ----, on descents in diving bells, xxii, 327. Measure of a French metre compared with an English yard, xxi, 382. Mécanique Céleste, translated by _N. Bowditch_, xix, 202; xxxv, 17. Mechanics, analytic, a new general principle of, _Jacobi_, xliv, 170. ----, experiment in, xxii, 362. ----, review of _Allen's_, xvii, 338. Meconic acid, _R. Hare_, xii, 293. Meconine, remarks on, xxiii, 380. Medals, remarks on, xxvii, 74. ---- and coins, _J. Allan_, xxxvii, 285. ---- ----, _J. W. Draper_ on, xxix, 157. ---- of New Haven, _J. Allan_, xxxvii, 285. ----, antique, found near Geneva, xx, 391. ---- founded by _De Lalande_, xxv, 190. ---- offered by the Royal Society of London, xxv, 412. Medal of the Royal Society of London, conferred on C. Lyell, xxx, 174. ----, Wollaston, conferred on L. Agassiz, xxx, 382. ----, Geographical Society, awarded to E. Robinson, xliii, 404. ----, Thomson's scientific, xviii, 198. Medical electricity, _J. Hall_, iii, 168. ---- School of South Carolina organized, ix, 392. Medina sandstone, freshwater fossils not occurring in, xlii, 230. Medusa, fossil, _C. S. Rafinesque_, iii, 285.^f Megalonyx, _R. Owen_, xliv, 342. ----, localities of, in the U. States, xxvii, 353; xlv, 209. Megatherium, no bony armor to, xxxvii, 371. ----, remains of, in Indiana, _R. Haymond_, xlvi, 294. ----, of Georgia, xxvii, 353. ----, of New Jersey, _R. Harlan_, xiv, 187. ----, of Patagonia, xxxiii, 105. Melam, _J. Liebig_, xxix, 372. Melamine, xxix, 372. Melanite of Franklin furnace, N. J., analysis of, _H. Seybert_, viii, 300. Mellon, _J. Liebig_, xxix, 371.