_Smith, J. L._, on the means of detecting arsenic, xl, 278; xlii, 75.^f ----, action of some alkaline salts on the sulphate of lead, xlvii, 81. ----, instrument for estimating the carbonate of lime in calcareous substances, xlv, 262.^f ----, action of phosphates of alkalies on carbonate of lime, &c., xlviii, 97. ----, chromate of potash, a reagent for distinguishing the salts of baryta and strontia, xxxvi, 183. ----, action of potash in cholesterine, xliv, 60. ----, notice of _V. Regnault_ on the dilatation of gases, xliv, 63. ----, on _Varrentrapp_ and _Will's_ mode of determining the nitrogen in organic compounds, xlii, 253^f; xlv, 267. ----, composition and products of distillation of spermaceti, and its oxidation by nitric acid, xliii, 301. ----, composition of marl from Ashley river, S. Carolina, xlviii, 101. ----, on fluorine in bones, xlvii, 131; xlviii, 99. ----, oxide of cobalt at Silver Bluff, S. Carolina, xlvii, 131; xlviii, 103. ----, a new method of making permanent magnets, by galvanism, xxxvi, 335.^f _Smith, J. P._, lectures on geology, xli, 387. _Smith, J. V. C._, remarks on his "Fishes of Massachusetts," xxxvi, 337. _Smith, L. W._, suspended animation from drowning, v, 125. _Smith, N._, obituary notice of, xvi, 211. _Smith, S._, on the salt springs and manufacture of salt at Salina and Syracuse, xv, 6. _Smith, W._, labors of, in English geology, xl, 219; xliii, 226. _Smithson_, notice of, xx, 306. Smoke, production and prevention of, _H. Dircks_, xlvi, 400. ---- disperser, _Millet's_, xvii, 164. Snail, edible, economical notice of, xxxii, 254. Snails, habits of, _J. T. Plummer_, xlviii, 93. ----, see farther under ZOOLOGY, _Mollusca_. Snake, copper-head, _C. S. Rafinesque_, i, 84. Snakes, fascination of, xii, 368. ----, ibid, objected to, xiii, 388. ----, preserving of, xii, 288. ----, two headed, _S. L. Mitchill_, x, 48.^f ----, remarks on, _S. Woodruff_, xxix, 304. ----, suspended by spiders, xxvii, 307.^f Snake Hill, Saratoga lake, ix, 1.^f Snake-root, Turman's, a supposed antidote for the bite of rattlesnake, N. Carolina, xlii, 43. _Snell, E. S._, instrument for exhibiting a certain optical deception, xxvii, 310. ----, facts relative to the temperature of the year 1839, from observations at Amherst College, xxxix, 36.^f ----, a singular case of parhelion, and the theory of halos, xlix, 73.^f ----, on some new articles of philosophical apparatus, xlix, 20.^f