Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 401
ith the fur-nace. At the Treadwtll mill. Douglas Island, Alaska, six Spence furnaces were used fordesulphurizing j)yrites concentrates for chlorination, with the result that slightly more than3 tons i)er 24 hours were roasted dead, with an expenditure of ^ cord of wood per ton ofore. Two men per… … Fig. 3.—The Ollara roasting-furnace. processes being performed at one operation. Attached to an endless chain at proper dis-tances apart are iron frames formed into a triangular shape; on these frames are a numberof plows or hoes set at an angle. One set turn the ore toward the center, the next set…
Mechanical engineering
Internet Archive · Boston Library Consortium · Public Domain Mark 1.0. Free to use for anything.
