Ether in space, idea of, when introduced, xxxiii, 1. ---- ----, resistance to motion of heavenly bodies, xvii, 389. ---- ----, examination of the theory of, _R. W. Haskins_, xxxiii, 1. ----, boracic, xlviii, 189. ----, chloric, new mode of obtaining, _S. Guthrie_, xxi, 64. ----, hydriodic, _M. Serullas_, xviii, 161. ----, hyponitrous, _R. Hare_, xxxv, 329. ----, nitrous, new process for, _R. Hare_, ii, 326. ----, nitric, process for, _R. Hare_, xxxiii, 241.^f ----, œnanthic, xxxii, 381. ----, perchloric, _C. Hare_ and _M. H. Boyé_, xl, 50, 382; xlii, 63. ----, silicic, xlix, 192. ----, sulpho-cyanic, xvii, 377. ----, sulphuric, on the manufacture of, xxii, 199. ----, sulphurous, _R. Hare_, xxxi, 275. ----, ----, and sulphate of etherine, _R. Hare_, xxxi, 275. ----, vaporization of, vi, 396. ----, action of, on sulphate of indigo, xxiv, 371. ----, odor of wines due to a peculiar, xxxii, 381 (œnanthic ether.) Ethers of the vegetable acids, method of preparing, xlvii, 197. ----, and benzoic compounds, formulas for, _Wöhler_ and _Liebig_, xxvi, 285. Etherine, sulphate of, _R. Hare_, xxxi, 275. ----, sulphate of, on the destructive distillation of, _C. Hare_, xxxvi, 76. Ethule, perchlorate of the oxide of, _C. Hare_ and _M. H. Boyé_, xlii, 63. Euchlorine, preparation of, vi, 164. Eudiometer, improved, _R. Hare_, ii, 312^f; x, 67^f; xii, 36^f; xxxvii, 383. ----, barometer gauge, _R. Hare_, xxxii, 280.^f ----, subsidiary, _R. Hare_, xv, 271.^f Eudiometry, theory of action of nitrous gas in, _J. F. Dana_, vii, 338. ----, new mode, with nitric oxyd, and apparatus for, _R. Hare_, xv, 262-271.^f Eupatorium huaco, xxiv, 279. Europe, northern, rock formations of, xvii, 16. ----, physical geography of, _G. F. Schouw_, xxi, 127. ----, education in, see _Education_. Eupyrchroite of Emmons, a phosphate of lime, _L. C. Beck_, xl, 77; xlvi, 32. Evaporation, mode of accelerating, ix, 203. ---- by means of bladders, xv, 392. ---- of ice, xvi, 390. ---- of spirits, iii, 376. Excavations of basins or pot-holes by water, in the Green Mts., Vt., vi, 252. Exhilarating gas, effects of, in two cases, v, 194. _Exley, T._, specific gravities of nitrogen, oxygen, chlorine, vapors of carbon, sulphur, arsenic, phosphorus, xxxv, 298. Exogenites, vii, 179. Exogyra, see ZOOLOGY, _Mollusca_. Expansion of solid bodies, instrument for, _W. W. Mather_, xxx, 324.^f