110 A BIOMETRIC STUDY OF BASAL METABOLISM IN MAN. 



groups of individuals of the age-range here under consideration total 

 heat-production decreases with increasing age. 



Nine of the 12 values are over 3 times as large as their probable 

 errors. They are, however, extremely irregular in magnitude, ranging 

 from 0.092=^0.126 in the first supplementary series of men (A r = 28) 



TABLE 36. Statistical constants of age in adults. 



TABLE 37. Correlation between age and total heat-production and partial correlation between age 

 and heat-production for constant stature and for constant body-weight. 



to 0.501 0.116 in the second supplementary series (jV = 19). While 

 the probable errors of these constants are relatively very high because 

 of the small numbers of individuals available, this need not be taken 

 as the final explanation of the highly irregular values. Both stature 

 and body-weight vary greatly in human individuals, and, as pointed 

 out on page 63, this variation in the adult is largely independent of 



