Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 403
e conducting ofthe degree of heat in the roasting heap is therefore an operation liable to injure the ore instead of bene-fiting it. Ores which melt readily, such as impure iron ores, silver and lead ores, pyrites of all kinds,require more than common watchfulness to insure success in the… … 2311. j np MMJ
Mechanical engineering
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
