Item #4185 DETAILS OF CYANIDE PRACTICE. Herbert A. Megraw.


New York: McGraw-Hill Book Co., 1914. First Edition. Hard Cover. Octavo. Item #4185

215pp.,illustrated with many photographic illustrations of mining mills throughout the US and Canada, bound in burgundy cloth, spine lettering gilt A fine copy without dust jacket as issued. Cyaniding is a process used to extract a finer degree of the ore, especially gold during the milling process rather than losing it in the tailings. The author describes each mine's milling process and the cost effectiveness of the use of cyaniding within each mine he visited. Many mines such as copper or silver mines used this process as gold was and still is important by product of their industry. Nice early photographs of mines.

Price: $175.00

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