Metallurgy Book by W. Borchers Gold Silver Platinum Refining/Extraction Methods MYOGB-150-240 The cross shaft is 11/16"

The cross shaft is 11/16" in width

• Power: 10X

You may see some White/Grey material on the surface of your sluice

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They each weigh 11

Metallurgy Book by W. Borchers Gold Silver Platinum Refining/Extraction Methods MYOGB-150-240 The cross shaft is 11/16"Metallurgy by W. Borchers A Brief Outline of the Modern Processes for extracting the More Important Metals Originally Published in 1911 we chose to reprint this classic text because of its short and concise descriptions for recovering some of the more important metals such as Gold, Silver, Platinum plus 14 others. Covers mechanical means of recovery, chemical means of recovery, and Electrolytic means of recovery. Great text and must have in every