---- ----, in New Hampshire, xviii, 129, 131. ---- ----, in Vermont, i, 115; vi, 245. ---- ----, in Massachusetts, viii, 54; x, 18; xxii, 51. ---- ----, in Rhode Island, viii, 199. ---- ----, in Connecticut, i, 49; v, 44; vii, 56; x, 13; xxxiii, 160. ---- ----, in New York, v, 12, xix, 224; xxv, 350; xxviii, 172^f; xlvi, 36.^f ---- ----, in Pennsylvania, iv, 4; viii, 239; x, 222; xiv, 5, 6, 8, 13. ---- ----, in Ohio, xvi, 156. ---- ----, in New Jersey, v, 28. ---- ----, in Maryland, xviii, 80. ---- pyrites, in North and South Carolina, iii, 3; v, 262; xli, 183. ---- ----, in Alabama, xxiv, 9. ---- ----, in Canada, viii, 75. ---- ----, in Nova Scotia, xv, 213. ---- sand, in Massachusetts, i, 115. ---- ----, in Connecticut, vi, 232. ---- ----, in Canada, viii, 75. ----, silicate of, Bodenmais, xviii, 164. ----, specular, association of, in Jefferson and St. Lawrence Cos., _E. Emmons_, xl, 81. ----, ----, of volcanic origin, theory of formation of, _G. Bischof_, xxxvi, 237. ----, ----, ibid, _Mitscherlich_, xxxvi, 237. ----, ----, in Canada, viii, 76. ----, ----, in Maine, x, 17. ----, ----, in Massachusetts, i, 115, 438. ----, ----, in New Hampshire, xviii, 131. ----, ----, in New York, iv, 250; xxi, 329; xl, 81. ----, ----, in Pennsylvania, iv, 4; xiv, 9. ----, ----, in Rhode Island, ix, 46. ----, sulphate of, in Massachusetts, i, 115; viii, 56. ----, ----, in Connecticut, v, 36; viii, 260; x, 13. ----, ----, in New York, iv, 250; xv, 243. ----, ----, in New Jersey, v, 265. ----, titanic, near Baltimore, Maryland, _T. G. Clemson_, xvii, 42. Irradiation, notice of _B. F. Joslin's_ memoir on, xxvii, 389. Ischil, salt mines of, xxix, 225. Islands, floating, _A. Pettengill_, xii, 122. ----, sudden formation of, from volcanic action, _G. Bischof_, xxxvi, 267. ----, volcanic, near Sicily, thrown up, xxi, 399.^f Isomeric compounds, xix, 383. ---- bodies, _J. J. Berzelius_ on, xxvi, 178. Isomerism, remarks on, xxviii, 356. Isomorphism, _H. Kopp's_ views on, xlvi, 369. ----, exceptions to the law of, xxxv, 302. Isopyre, analysis of, xv, 388. Italy, see _Vesuvius_ and _Volcano_. _Ives, A. W._, chemical examination of hop, ii, 302. _Ives, Eli_, on a species of Limosella, i, 74. ----, on the amount of nutritious matter afforded by an acre of land cultivated with potatoes or wheat, i, 297. ----, new species of Asclepias, i, 252.^f ----, on spring pasture, iii, 355. Ivory paper, iii, 370. ----, vegetable, xlix, 400. J.