208 A BIOMETRIC STUDY OF BASAL METABOLISM IN MAN. 



ism of. the women is lower than it would be in men of the same age if 

 physical differences were disregarded. The differences range from 

 119.2 to 326.6 calories, or from 8.0 to 19.2 per cent. The results are 

 represented graphically in the lower figure, A, of diagram 27. In this 

 and the following four diagrams the upper row of dots represents the 

 theoretical and the lower row the actually observed average basal 

 metabolism for the groups of individuals. 13 



ISOO*- 



/TOO 

 ISCO 

 ISOO 

 1400 

 1300 





n 



. n 22 ^7 



FIG. A 



DIAGRAM 27. Comparison of metabolism of men and women. Women 



classified according to age. 



The differences between the theoretical and the actual heat- 

 production is not as great in the older groups of women as in the 

 younger. This point will be touched upon later. 



13 In this and the following diagrams the theoretical heat-productions calculated from the 

 linear equations should of course lie in a straight line except for the divergences due to the devia- 

 tions of the individuals in the subgroups from the mid-ordinate values for age, stature, body- 

 weight, and body-surface due to the errors of random sampling. The remarkable agreement of 

 the best-fitting straight line and the calculated mean theoretical heat-production of the several 

 groups of women furnishes a most gratifying justification of the system of grouping adopted. 



