Copper, atomic weight of, xlviii, 402. ----, amount produced in Great Britain and Ireland, for the year ending June 30, 1822, viii, 390. ----, determination of, in a binoxide salt, xlvii, 193. ----, partial reduction of the binoxide of, by heat, xlviii, 184. ----, hydride of, _A. Wurtz_, xlviii, 185. ----, silvering of, xxiii, 386. ----, metallic, galvanic formation of, in a mineral vein, xxxiv, 44. ----, protoxide of, xxii, 353. ----, white, artificial, viii, 380. ----, _Witting's_ test for, ix, 201. ----, tendency of iron to protect, when exposed to sea-water, xxv, 203.^f ----, foliaceous, of Vesuvius, xi, 267. ---- and potash, sulphate of, xx, 195. ----, native, in Connecticut, i, 55; vi, 230; xxxiii, 160. ----, ----, connection with trap in Connecticut and Michigan, xlvii, 132. ----, ----, in drift, Massachusetts, _E. Hitchcock_, xlv, 331. ----, ----, in N. Jersey, Summerville mine, v, 401; xxxvi, 107. ----, ----, ----, _L. C. Beck_, xlv, 331. ----, ----, of Michigan, _D. Houghton_, xli, 185; xlv, 331, 332. ----, ----, mass of, from Lake Superior, _H. R. Schoolcraft_, iii, 201.^f ----, ----, ----, presented to Yale College, xxvii, 381. ----, ----, and silver, of Lake Superior, _C. T. Jackson_, xlix, 81. ----, ----, in Missouri, iii, 71. ----, ----, in the trap and amygdaloidal minerals of Nova Scotia, xv, 134; xxx, 350. ----, ----, and ores of, in northern American, at the copper mountains, xvii, 8. ----, carbonate of, in Connecticut vi, 206. ----, ----, in Massachusetts, i, 115; vi, 207. ----, ----, in Michigan, xli, 185. ----, ----, in Pennsylvania, i, 236; viii, 239. ----, crenate of, analysis, _C. T. Jackson_, xxxvii, 398. ----, oxides of, in Connecticut, vi, 206. ----, ----, in Michigan, xli, 185. ----, ----, in Pennsylvania, viii, 239. ----, sulphurets of, in Canada, viii, 47, 75. ----, ----, in Connecticut, i, 316; vi, 206, 231; xxxiii, 160. ----, ----, in Massachusetts, i, 115, 136, 437; vi, 207; x, 215; xxii, 61. ----, ----, in Maryland, xviii, 80; xxvii, 20, 23. ----, ----, in Michigan, xli, 185. ----, ----, in New York, viii, 249. ----, ----, in New Jersey, ii, 192, 198; v, 268. ----, ----, in North Carolina, xli, 183, 348. (See also under _Copper mines_.) ----, phosphate of, in New Jersey, v, 401. ----, silicate, in Michigan, xli, 185. ----, siliceous hydrate in New Jersey, _G. T. Bowen_, viii, 118. ---- mines or ores in Massachusetts, account of, vi, 207; xxii, 61. ---- ----, at Strafford, Vt., xxi, 383. ---- ----, in Connecticut, at Cheshire, vi, 206;--_C. U. Shepard_, xxxiii, 160. ---- ----, ----, at Bristol, vi, 231. ---- ----, in Maryland, xxvii, 22. ---- ----, in N. Jersey, Schuyler's, v, 239. ---- ----, ----, at Summerville, v, 401. ---- ----, ores and the minerals of the vicinity of New Brunswick, N. Jersey, _L. C. Beck_, xxxvi, 107. ---- ----, on Lake Superior, _H. R. Schoolcraft_, vii, 43. ---- ----, ibid, _D.