LVII.

COPPER AND COPPER MINES.

ANTIQUITY OF COPPER.—USE OF IT AMONG THE ANCIENTS.—OLDEST COINS.—THE COLOSSUS OF RHODES.—COPPER MINES OF ENGLAND AND OTHER COUNTRIES.—NATIVE COPPER.—HOW IT IS WORKED.—OVERTHROWING A MASS.—A LUMP WEIGHING EIGHT HUNDRED TONS.—MALACHITE. 817