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Updated: May 20, 2025
At 2000 feet the mine will increase in heat 28°, at 4000, 57°; to this must be added the constant temperature of 50° 5', so that at 2000 feet it would be 78° 5', and at 4000, 107° 5' Fahr. By actual trial on July 17, 1857, in Duckingfield Pit, the temperature at 2249 feet was 75° 5'. From this it may be conceived in what great heat the men have to work, and the work is very hard.
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