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ABSTRACT WE are informed that air-conditioning plant is about to be installed in the well-known Robinson Deep Mine, Johannesburg, South Africa, the deepest point in the mine being 8,380 ft.
below the surface of the earth. The mine is naturally hot and damp, the high temperature (100°-120° F.) being due to adiabatic compression at the lower levels; it is calculated that the
temperature increases 5° for an average depth of every 1,000 ft. of the mine. The air is also very moist, having a relative humidity of 90-100 per cent, owing of course to the necessity of
wetting the mine walls after every blast to prevent siliceous dust from being thrown into the air and being inhaled by the workers, thus causing the silicosis which is well known to be the
scourge of South African mining. It is stated that the air-conditioning, cooling and dehumidifying plant is the largest in the world, and will be capable of dealing with 400,000 c. ft. of
air per minute. It is stated that the cooling effect is equal to 4,000,000 pounds of ice. Access through your institution Buy or subscribe This is a preview of subscription content, access
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Air-Conditioning in Mines. _Nature_ 135, 28 (1935). https://doi.org/10.1038/135028c0 Download citation * Issue Date: 05 January 1935 * DOI: https://doi.org/10.1038/135028c0 SHARE THIS
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