Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 409
s and expensive. If thezinc is not removed to a large extent, it will, in smelting the ore, carry off by evaporation much of theother metals, gold and silver not excepted. The sulphurets of zinc and lead are very fusible if in- con-tact. In roasting the ore these two sulphurets will invariably melt…
Mechanical engineering
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
