Insanity, _B. W. Dwight's_ cases of, i, 431. ----, connection of civilization with, xxii, 379. Insects, circulation in, xxx, 186. ----, miscellaneous observations on, _J. T. Plummer_, xl, 146. ----, a means of protecting trees from, x, 204. ----, method of destroying, xxxiii, 273. ----, on the preservation of, _T. Roger_, xix, 213. ----, produced, as supposed, by galvanism, _A. Crosse_, xxxii, 374^f; xxxv, 125.^f ----, ibid, _W. H. Weekes_, xliii, 395. ----, not produced by galvanism, xxxiii, 272; xlix, 227. Inspiration of inflammable gas, xiv, 370. Institute, Albany, transactions of, noticed, xvii, 208, 415; xix, 173, 360. ----, Mechanic's, New York, notice of proceedings, xxxi, 415. ----, National, a society established at Washington, xli, 203. Interest, new mode of computing, _G. R. Perkins_, xlvii, 51. Interference of light, new case of, _Powell_, xxxviii, 107. ---- ----, apparatus for experiments on, _E. S. Snell_, xlix, 26.^f Iodate of soda, iodate of magnesia, and a borate, &c., Tarapaca, _A. A. Hayes_, xxxviii, 410; xxxix, 378; xliv, 6. Iodic acid, crystallization of, xx, 185. ----, action of, with morphine, xx, 184. ---- ----, combinations of, with vegetable alkalies, xix, 371. ---- ----, preparation of, xxviii, 136. Iodide of azote, preparation of, _Serullas_, xviii, 154. ---- of calcium and potassium, xvii, 177. ---- of lead, decomposition of, xv, 188. Iodine, iii, 386. ----, acidification of, by nitric acid, xxi, 376. ----, atomic weight of, _J. J. Berzelius_, xix, 383. ----, crystallization of, xvii, 168. ----, ----, _W. W. Mather_, xviii, 84.^f ----, action of, on the protochloride of mercury, xvi, 395. ----, a reagent for hydrosulphuric acid, _A. du Pasquier_, xl, 123. ----, used as a dye, xv, 394. ----, medical uses of, iii, 386; vi, 383. ----, ---- ---- of tincture of, xx, 196. ----, ---- ----, ibid, in a report by _Dumeril_ and _Magendie_, xx, 386. ----, ---- ----, in Anguina pectoris, xx, 411. ----, ---- ----, in causing disappearance of the breasts, xi, 395. ----, ---- ----, in gout and Anguina pectoris, xvi, 176. ----, ---- ----, as a cure for the goitre and scrofula, v, 387. ----, occurrence of, in coal, _Bussy_, xl, 217. ---- and bromine in mineral waters, remarks on, _C. Daubeny_, xxi, 366. ---- in a mineral spring in Italy, vii, 387. ---- in the Saratoga mineral water, xvi, 217; _J. H. Steel_, xvi, 242. ---- in the Kenawha waters, xviii, 260. ---- and bromine in the salt springs of Athens, Ohio, _W. W. Mather_, xlix, 211. ---- in plants and mosses, xlv, 227. ---- in sponges, ii, 363. ----, in an ore of zinc, xvi, 389. ----, cyanide of, a mode of obtaining, xiii, 181. ----, fluoride of, _H. B. Leeson_, xlix, 205. ---- and phosphorus, heat from, xxvii, 200. ---- and oxygen, new compound of, (hyperiodic acid) xxviii, 141.