Spon, Ernest, Haldane, Robert, Lock, Charles G. Warnford (Charles George Warnford), 1853-1909 · London ; New York : E. & F.N. Spon · leaf 414
Generally the metal does not recourse must be had to the wet way. fuse, though the melting-point of copper The roastius; alluded to above is per- may be reached and surpassed : it re- formed on the hearth of an ordinary tains the form of little cubes, and is revcrberatory furnace, or in more com-… … The materials, granulated mattes, are earlier steps in the reduction of the charged through the openings iu tlie matte or speiss consist of processes arch ; they are roasted Ijy the o.xidiziug very similar to those employed iu Ihime of a sort of blow-pipe entering the smelting of copper. The…
Workshop recipes · Technology · Industrial arts
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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