The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 180
melt the silver and lead, but not the copper,which former are allowed to pass off through the oiiening at the lower endof the retort into a suitable vessel, leaving the copper almost free from thesilver and lead, which two metals are to be afterwards separated by the or-dinary process of… … Fig. 7 2 5 Ann The first part of this specification relates to a mode of constructing a fur-nace, the arrangement of which will be seen by the accompanying diagrammarked Fig. 1, which is a longitudinal section, a, is a shaft for feeding thefire with coal or coke ; b, the fire grate ; c, the hearth…
Architecture · Civil engineering · Science
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