Observations on the Working Ability of Bantu Mineworkers with Reference to Acclimatization to Hot Humid Conditions

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Abstract
Observations were made on a group of Bantu mining recruits and 1 of 8 workers with 4 to 6 months experience. A standardized task at D.B. 90[degree], W.B. 89[degree]F was required to compare with an identical task previously used on European subjects. Three successive expts. were done on each group. Progressive changes in sweat rate, rectal temp. and pulse rate of acclimatization were noted in both groups. The expt. in the conditions with air movements varying from 165 to 300 ft./min., and a single expt. in still air at D.B. 93.3%, W.B. 91.2[degree]F on the experienced group, indicate that these experienced Bantu miners are in no better state of acclimatization than Europeans artificially acclimatized to work at 110 Cals/sq. m./hr. level.

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