_Dana, J. F._, on arsenical cobalt, and the modes of detecting cobalt, viii, 301. ----, on cantharadin in the Lytta vittata, or potato fly, ii, 137. ----, chemical examination of some morbid animal products, iv, 149. ----, on the connexion of heat, electricity and magnetism, vi, 163.^f ----, concretion from the tonsil, vi, 165. ----, electrical battery, i, 292.^f ----, preparation of euchlorine, vi, 164. ----, galvano-magnetic apparatus by, vi, 330.^f ----, theory of the action of nitrous gas in eudiometry, vii, 338. ----, effect of vapor on flame, i, 401. ----, on the wax of the Myrica cerifera, i, 294. _Dana, S. L._, analyses of coprolites, xlviii, 46. ----, on the indigo of commerce, xlii, 320. Danaite, analysis of, _A. A. Hayes_, xxiv, 386. ----, identical with mispickel, xlvi, 384.^f Danburite, analysis of, _C. U. Shepard_, xxxv, 137. _Darlington, W._, pluviometrical observations at Westchester, Penn., vi, 326. ----, note on Cardamine rotundifolia, xviii, 356. ----, importance of the grasses to man, xli, 365. _Darling, N._, hurricane in New England, Sept., 1815, xlii, 243. Datholite, crystal from Roaring Brook, Ct., _J. D. Dana_, xlvi, 380.^f ----, in Connecticut, xxii, 389; xlvi, 380.^f ----, in New Jersey, ii, 191, 369; v, 400; xl, 69; xliv, 58. ----, in New York, xliv, 58. _Daubeny, C._, on the climate of N. America, xxxv, 288. ----, disintegration of the dolomites of the Tyrol, xlii, 321. ----, remarks on iodine and bromine in mineral waters, xxi, 366. ----, geology of N. America, xli, 195. ----, on the thermal springs of N. America, xxxvi, 88. ----, quantity of salt in seawater, xxxvi, 188. ----, on manures as stimulants to vegetation, xlii, 319. ----, effect of arsenic on vegetation, xxxi, 346. _Daubuisson's_ Elements of Geology announced, ii, 166. _Davenport's_ rotating electro-magnetic machine, xxxii, appendix after 216. ----, electro-magnetic machine, xxxiii, 193. _Davies, C._, demonstration of a problem in conic sections, vi, 280.^f _Davyne_, analysis and figure of, xi, 255.^f Day, possible variation in the length of, _W. W. Mather_, xlvi, 344. _Day, G. E._, on the restoration of the deaf and dumb to hearing, xxx, 301. Dead animals, means of employing, _M. Payen_, xxiv, 326. ----, bodies, preservation of, i, 307. ----, Sea, observations on, ix, 349. ----, ----, level of, xl, 213. ----, ----, barometrical observations made to determine the level of, xlii, 214. ----, ----, account of, _J. D. Sherwood_, xlviii, 1. ----, ----, analysis of waters of, xiii, 395; _B. Silliman, Jr._, xlviii, 10. Deaf and dumb, observations on the language of signs for, by _S. Akerly_, viii, 348. Deafness, cure of, ix, 204; xxx, 301.