— —, at Ekatherinenburg, xvii, 25.
— —, Rio Tinto, Spain, yield of, xxviii, 144.
— mountains, Northern America, xvii, 8.
— ores, on the roasting of, xxix, 374;
–in Sweden, xxviii, 145.
— sheathing of ships, on the corrosion of, H. Davy, ix, 207.
— —, causes of the destructibility of, Prideaux, xlii, 322.
Copperas manufactured at Stratford, Vt., viii, 180; xxi, 383.
— — from pyrites in Morris Co., N. J., v, 28.
Coralline agates in the West Indies, i, 141.