Chalk, coralline animalcules in, xxxix, 205. ----, corals and entomostraca in, xxx, 382. ----, of France, viii, 216. ----, see farther, _Cretaceous_. Chalybeate waters, action of cork on, viii, 390. ---- ----, artificial mode of making, viii, 105; xi, 392. Chameleon, change of color, xxviii, 79. _Champion, G._, geology, scenery, &c., of the Cape of Good Hope, xxix, 230. _Channing, W. F._, observations on photographic processes, xliii, 73. _Chapin, A. B._, junction of trap and sandstone, at Wallingford, Ct., xxvii, 104.^f _Chaptal, J. A._, biography of, xxvi, 127. Charcoal, remarks on, xii, 389. ----, manufacture of, xxi, 156. ----, a cheap mode of manufacturing, xxvi, 188. ----, decoloring action of, xvi, 393. ----, bitterness of some substances removed by, xxi, 374. ----, report on Dumont's prepared, xxiii, 346.^f ----, animal, effect of, in preventing the putrefaction of stagnant water, x, 189. ----, ----, action of, _R. Warrington_, xlix, 393. ----, fusion of, _B. Silliman_, v, 108, 361; vi, 341, 349, 378; viii, 147; x, 109, 119. ----, ----, _J. Griscom_, v, 364. ----, ----, _R. Hare_, viii, 288; x, 111, 118; xxxviii, 190. ----, ----, _L. Vanuxem_, viii, 292; x, 102. Charlatanism, or selling pharmaceutical preparations under false denominations, in Paris, xviii, 401. Charring wood, new mode of, by _I. Doolittle_, xvii, 395.^f ---- ---- at low temperatures, xx, 189. Chart, magnetic, of the U. States, _E. Loomis_, xxxiv, 290^f; xxxix, 41.^f Chathamite, xlvii, 350; xlviii, 175, 179. _Chauvenet, W._, solution of a problem in sailing, xlvi, 79. Cheirotherium, footprints of, in England, xxxvi, 394, 397; xxxvii, 223. Chemical attraction, modified by quantity of matter, _E. Mitchell_, xvi, 234. ---- classification, _O. W. Gibbs_, xlix, 384. ---- equivalents, Wollaston's scale of, xvi, 371. ---- ----, scale of, improved, by _L. C. Beck_ and _J. Henry_, xiv, 202. ---- ----, circular scale of, _J. Finch_, xviii, 196. ---- examination of some morbid animal products, _J. F. Dana_, iv, 149. ---- ----, of the odorous fluid of the skunk, iv, 391. ---- force of the indigo-tithonic rays, instrument for measuring, _J. W. Draper_, xlvi, 217.^f ---- manipulation, washing bottle in, xxxi, 292.^f ---- nomenclature, _Berzelius_ on, xxii, 248. ---- ----, _R. Hare_, xxvii, 63; xlix, 249. ---- science, state of, in 1826, _D. Olmsted_, xi, 349; xii, 1. ---- symbols, _Whewell's_, xxi, 369. ---- theory, and a notice of Gorham's Chemistry, iii, 330. Chemistry, _Dumas's_ theory of substitution in, xxxviii, 114. ----, remarks on Berzelius's treatise, _R. Hare_, xxvii, 61. ----, Gorham's, notice of, iii, 330. Cheese, potato, xviii, 395; xxiii, 202. Chené, and the oil it affords, ii, 264. Chert and siliceous petrifactions, Antigua, _S. Hovey_, xxxv, 79. _Chevallier, A._, on the uses of chlorides and chlorine, xxiii, 129.