A rudimentary treatise on the metallurgy of silver and lead .. (1861)
Lamborn, Robert H · London, J. Weale · leaf 162
150 MANIPULATION IN PATTINSON’S PROCESS. and heated rapidly until fused. The heat is continued until the metal is raised to a temperature somewhat higher than that necessary to give it complete fluidity. The fire is then put out, and the mass in the pot partly … 65 and 66 is employed for lifting out the crystals. The lower part is formed of iron, and the upper of wood, that it may be more conveniently handled. It is kept warm, and before being used is plunged several times into the fused metal, that it may assume entirely the same temperature.
Silver · Lead
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