Rock Temperatures and Some Ventilation Conditions in the Mines of Northern Ontario

THE mines of northern Ontario have entered the class of deep mines. It has often been asked: How deep can operations be carried on? What will ü:e temperature be? This paper is a résumé of a brief survey of rock temperatures made by the Ontario Department of Mines during the year 1932. Present temperatures were recorded and the geothermal gradients that now exist were determined. No alarming situations were found, but many interesting ones have been noted.
Keywords: Air, galvanometer, geothermal gradient, Kirkland Lake, RocK TEMP., temperature, Geothermal gradients, Kirkland Lake, Mine, Mines, Rock, Rocks, Surveys, Temperature
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