Calstronbarite, supposed new mineral, _C. U. Shepard_, xxxiv, 161. ----, not a mineral species, xliii, 366. Cambrian system, _Sedgwick_, xxxvii, 220. Cambridge, England, improvements in, xlvi, 403. Cambridge course of mathematics, review of, v, 304. Cameos, from shell, xxxii, 257. _Campbell, A. W._, an electro-magnetic engine, xxxv, 343.^f Camphor, crystallization of, _M. John_, xiii, 175. ----, odor of, destroyed temporarily by electric action, xix, 380. Canada, maps of, in course of preparation, xvi, 380. Canada, vegetable coloring materials in, xviii, 186. ----, cave containing bones at Lanark, ix, 354. ----, supposed volcano in, xxx, 238, 241. ----, highest mountain in Lower, xxx, 239. ----, geology and minerals of the vicinity of Kingston, xviii, 104. ----, transition rocks of the Cataraqui, _R. H. Bonnycastle_, xviii, 85; xx, 74^f; xxiv, 97^f; xxx, 233.^f ----, various fossils in, _J. Bigsby_, viii, 60. ----, geological survey of, ordered, xlviii, 404. Canals, mathematical problems relating to contents of, _D. C. Lapham_, xxvii, 127.^f ----, navigable, _Girard_ on, iv, 102; vii, 286. ----, Amsterdam, v, 181. ----, in the U. States, extent of, _Prof. Henry_, xxxiii, 296. ----, method of conducting surveys of, in the state of New York, _E. F. Johnson_, xxiv, 19.^f ----, Erie, tolls on, x, 398. ----, of Ohio, xx, 416; xxv, 241. ----, Ohio and Pennsylvania, xxxi, 40. ----, of Pennsylvania, _E. Miller_, xxv, 85; xxvi, 108. ----, route of the Michigan and Illinois, _C. U. Shepard_, xxxiv, 138. ----, Louisville and Shippingsport, Ky., xiv, 65.^f Canal, Welland, U. C., account of, _W. H. Merritt_, xiv, 159.^f ----, to connect Lake Superior with Lake Huron, xlvi, 213. ----, locks at Cincinnati, Ohio, plan of, _D. Lapham_, xxiv, 70.^f ----, navigation, mode of, vii, 190. Cancer, fossil, in New Jersey, xvii, 287. Cancers, cured by surgery, xii, 386. Candle, motion of the melted grease in warming, _C. Fox_, xxxiii, 198.^f ----, ---- ----, note on, xl, 148. Candlenut tree, of the Sandwich Islands, xxxiv, 209. Cannel coal, see _Coal_. Canova, statue of, by _Ceccarini_, iv, 197. Cantharides, vesicating principle of, _G. W. Carpenter_, xxi, 69. Cantharidin, in the potato fly, _J. F. Dana_, ii, 137. Caoutchouc, electrical properties of, xx, 404. ----, _Mitchell's_ mode of working, xix, 195. ----, sheet, xvii, 399. ----, cloth coated with, xxxiii, 400. ----, rendered impermeable to gas, xlvii, 194. ----, mineral, vi, 370; xl, 215. ----, ----, in Connecticut, vi, 370. Cape of Good Hope, geology, scenery, &c., _G. Champion_, xxix, 230. ---- ---- ----, fossils of, xlix, 213.