Deepest gold mine in the world is the Robinson Deep in South Africa's Witwatersrand, whence comes more than half of present world gold production. The Robinson Deep has sunk an inclined 3-mile shaft to a vertical depth of 8,380 ft. At that depth miners sweat, stagger and topple in a temperature of 104°, a humidity of nearly 100. Working efficiency is less than 30%. With gold prices soaring and money to spend, the company asked Willis Haviland Carrier, Newark engineer, to plan the world's biggest air-conditioning plant. Last week, with plans drawn up...
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