Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 412
ttle copper, is returned to the cal-cined ore, and smelted along with it. In this operation fluxes are added in case the ore does not con-tain sufficient flux for smelting. Iron forms the best flux, and for these reasons: copper pyrites, whichalways contain more or less iron pyrites, are the most…
Mechanical engineering · Mechanics · Engineering
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