36437, Sept 9, 1862). Although the "Keith Process" of ore crushing and smelting worked in the laboratory, he failed to perfect the system on an industrial scale. He was superintendent of several mining operations, including the well known Mammoth mine, which closed when the vein pinched out.
36437, September 9, 1862). Despite the "Keith Process" working effectively in laboratory settings, he was unable to refine it for industrial use. He held positions as superintendent of several mining operations, including the well-known Mammoth mine, which ceased operation when the vein diminished.