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November 13, 1943

A Critical Analysis of Collapse in Underground Workers on the Kolar Gold Field

JAMA. 1943;123(11):731. doi:10.1001/jama.1943.02840460065030

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This is a discussion of the results of an investigation of the mechanism of heat collapse and its contributory causes in the Ooregum, Mysore, Champion Reef and Nundydroog mines of the Kolar Gold Field from Nov. 18, 1939 to Nov. 17, 1941. The factors observed that may have influenced the incidence of heat collapse were individual, seasonal and underground. Individual factors were determined by a careful history and physical examination of all cases (293) of alleged collapse in underground workers admitted during the two years to the Kolar Gold Field Hospital, irrespective of the mildness of the condition or its cause. Seasonal factors were determined by information on surface conditions obtained from the Kolar Gold Field Observatory. Information on underground factors, such as wet and dry bulb temperatures, humidity and velocity of air at the working places, was obtained from the mine superintendents.

The patients were classified into three groups

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