A rudimentary treatise on the metallurgy of silver and lead .. (1861)
Lamborn, Robert H · London, J. Weale · leaf 156
144 CALCINING IMPURE LEAD. containing less silver, and a rich lead with a large amount of the more valuable metal, and at the same time securing the extraction of many of the above- mentioned impurities, Pattinson’s process is in use. One or both of these operations are omitted in many furnaces,… … Calcining Furnace. as is shown in the accompanying cuts, Figs. 59 and 60, of which the former represents a vertical section, and
Silver · Lead
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