Rogers_, characters of some recent, as bearing upon the dynamics of geology, xlv, 341. ----, ----, undulatory character of, xlvii, 274. ----, ----, on undulations of, a cause of flexure in rocks, xliii, 177; xlv, 341. ----, effects of, on the growth of wheat, ix, 208. East and West Rock, N. Haven, Ct., geological structure of, vi, 44. ----, scenery of, vii, 1. _Eastman, R._, improved rotary saw machine, v, 146.^f _Eaton, A._, alcohol, observations on, xvi, 173. ----, geology of the Highlands, N. York, v, 231. ----, ---- and meteorology west of the Rocky Mts., xxv, 351. ----, ---- along the Erie canal, viii, 358; ix, 355; xiii, 383. ----, ----, coal formations of N. York, xix, 21. ----, ---- of northern states, notice of Index to, i, 69. ----, ----, Cherty limerock, xxxvi, 61. ----, ----, coal, anthracite, Washington Co., N. Y., xvi, 299. ----, ---- of Southampton Lead mine, i, 136. ----, ----, diluvial deposits in N. York and elsewhere, xii, 17. ----, gravel near Troy, v, 22. ----, North American localities, showing equivalency of rocks on opposite sides of the Atlantic, xxxix, 149. ----, cardinal points in stratiographical geology, xxi, 199. ----, geological equivalents, xxi, 132. ----, ----, nomenclature of rocks, xiv, 145^f, 359. ----, ----, Prodromus, xvii, 63. ----, gold rock of the south is talcose slate, xviii, 50. ----, ----, ----, of Mexico equivalent to that of the Carolinas, xx, 124. ----, Boletus igniarius, analogous to animal substances, vi, 177. ----, Crotalus reliquus, xx, 122.^f ----, gases and salts forming near Erie canal, xv, 233. ----, living antediluvial animals, xv, 233. ----, number _five_ a favorite in nature, xvi, 172. ----, magnetic needles, improvement in manufacture of, xii, 14. ----, trilobites, xxii, 165. ----, notice of new edition of the Geological Text Book of, xxii 391. ----, remarks by _D. Thomas_ on the views of, on the coal formations of New York, xix, 326. Ebullition by cold, apparatus for producing, _R. Hare_, xxxiii, 248.^f Echinus, see ZOOLOGY, _Radiata_. Echo, in Virginia, _C. G. Page_, xxxvi, 174. ----, in N. York state, _J. B. Church_, xxxvi, 175. ---- a means of determining the depth of a sea, not effectual, _C. Bonnycastle_, xxxviii, 160. Eclipse, solar, Feb. 12, 1831, xxii, 189. ----, ----, in 1834, observation on, _L. Brant_, xxvii, 386. ----, ----, of May, 1836, observations on, xl, 29. ----, ----, of Sept., 1838, observations on, xxxviii, 158, 163, 172, 174; xl, 29. ----, ----, ----, observations on, _D. Olmsted_, xxxv, 174. ----, ----, ibid, micrometric measures, _E. P. Mason_, xxxv, 176. ----, ----, of July, 1842, xlii, 175; xliii, 401; xliv, 211. ----, ----, ----, observations suggested by, xlii, 395. Edinburgh, on the geology of Calton Hill, near, _J. W. Webster_, i, 230.^f ----, freshwater limestone of Burdie House, _S. Hibbert_, xxviii, 365.