---- ----, ----, of Wyoming, on the rocks accompanying, vii, 260. ---- ----, ----, of Wyoming and Lackawanna valleys, account of, _B. Silliman_, xviii, 308.^f ---- ----, on Tioga river, analysis and description of, _W. Meade_, xiii, 32. ---- ----, in the Monongahela valley, _S. P. Hildreth_, xxix, 58.^f ---- ----, Carbon Creek deposit, some account of, _W. R. Johnson_, xxxix, 137. ---- ----, ibid, analysis of coal from, xxxix, 139. ---- ----, bituminous, xii, 69. ---- ----, ----, _S. P. Hildreth_, xxix, 77. ---- ----, Lehigh company, xxiv, 173. ---- in Rhode Island, anthracite, on the uses and characters of, _B. Silliman_, xi, 78. ---- ----, _C. T. Jackson_, xl, 187. ---- in Tennessee, xxix, 141; xxx, 391. ---- in Virginia, beds of, _J. Grammer,_ i, 125. ---- ----, bituminous, remarks on, _J. Pierce_, xi, 54. ---- ----, mines near Richmond, statistical and geological account of, _A. S. Wooldridge_, xliii, 1. ---- ----, bituminous, of Chesterfield Co., analysis of, _B. Silliman_ and _O. P. Hubbard_, xlii, 369. ---- ----, Kenawha valley, xxix, 108^f, 109.^f ---- ----, Wheeling, _S. P. Hildreth_, xxix, 80.^f ---- ----, porous anthracite or natural coke, _W. B. Rogers_, xliii, 175. ---- in eastern Virginia, of the lower oolite epoch, _W. B. Rogers_, xliii, 175. ---- of the Western states, characters, limits, &c. of the beds, _J. Hall_, xlii, 52. ---- mines, explosions in American, xxxvii, 387. ---- ----, accident in the Bovey, in consequence of the compression of the air, xvii, 38. ---- ----, burning of, at New Sauchie, xix, 386. ---- ----, fire damp, at Newcastle, chemical examination of, _E. Turner_, xxxvii, 201. Coast survey, U. States, xlix, 229. Coat of mail, found in Vermont, xiii, 199. _Coates, B. H._, on the Uvularia perfoliata, as a remedy for poisoned wounds, xxxv, 270. Cobalt, modes of detecting, _Prof. J. F. Dana_, viii, 301. ----, spontaneous combustion of, xv, 188. ---- and nickel, _Döbereiner's_ mode of separating, v, 188. ---- and nickel ores, of Chatham, Ct., analyses of, _A. A. Hayes_, xxi, 195. ----, [iron,] arsenical, of N. H., _J. F. Dana_, viii, 301. ----, oxide of, near Silver Bluff, S. Carolina, _J. L. Smith_, xlvii, 131; xlviii, 103. ---- ores, analyses of two, _Wöhler_, xxxvi, 332. ---- ----, localities of, in Connecticut, vi, 209, 235; xxi, 195. ---- ----, in Maryland, iv, 283. ---- ----, in Missouri, xii, 378. ---- ----, in N. Hampshire, viii, 198, 301. Coca of Peru, iii, 397. Coccolite in N. York, v, 269; vii, 57; ix, 40, 250; xix, 224. ---- in Canada, viii, 70. Coffee, consumption of, in Europe, iv, 392. ----, the Astragalus balticus in Sweden, a substitute for, v, 180. ---- tree, leaves of, used for tea, xlix, 401. _Coffin, J. H._, secular acceleration of the moon's mean motion, xlvii, 324.^f Cog-wheels, on the forms of, _E. W. Blake_, vii, 86.^f