Apparatus for Sulfur Mining
Description:
Patent for "new and useful improvement" for sulfur mining by Mr. Robert Carmichael. This device has particular application for mining in subterranean environments, "by use of pumping a heated fluid down into contact with a sulfur strata" (lines 14-15).
Date:
December 9, 1919
Creator:
Carmichael, Robert E.
Item Type:
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