A rudimentary treatise on the metallurgy of silver and lead .. (1861)
Lamborn, Robert H · London, J. Weale · leaf 140
ng is sometimes performed in heaps in the open air. A portion of the products of the celebrated mines of Bammelsberg, on the Hartz, and Fahlun, in Sweden, are treated in this way. At the metallurgic works connected with the former, a remarkable species of joasting is performed, during which some of… … Heap of Ore ready for Boasting. Rammelsberg, Hartz. a thick layer of pine wood a a a is put down for the foundation ; then the ore b b in pieces decreasing in size toward the top. Above this comes a layer of ore, already burned, which, being in a powdered condition.
Silver · Lead
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
