Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 413
d, the doors of the furnace are opened, moreeat is given, and the mass, ore and sings, thoroughly melted, with the addition of some pure quick-lime, which is occasionally thrown into the melting mass, and well stirred along with the ore. Most ofthe lead is yielded by the ore in this operation,…
Mechanical engineering
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