Abstract
The basal metabolic rates were studied in 100 normal men, 20 in each decade from 40-89 yrs., also in 2 men at 91 yrs., and one at 101 yrs. The fall observed in the rate of metabolism between 40 and 89 can be expressed by the equation: Cal. lost per sq. m. per hr. = 39.138[long dash]0.0678 X age. The negative correlation is[long dash]0.3328 [plus or minus]0.0889. In each decade, the degression is 0.664 cal. per sq. m. per hr. Statistical analyses of the results are given.

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