METABOLISM AS AFFECTED BY GROWTH. 



127 



meter of body-surface with an increase in age is worthy of consider- 

 ation. With No. 115, for example, the heat per kilogram of body- 

 weight rises from 49 calories at the age of 1 month to 61 calories at 

 the age of 5 months, the whole trend of the curve being upwards. 

 When measured on the basis of body-surface, the heat is as low as 

 765 calories at 1 month and rises to 1,061 calories at the end of 5 months. 



54 375 1050 



51 325 1000 



275 950 



Kgs. 



6J5 225 900 



Pulse 



rate 



575 100 



4.75 



375 



50 



2 mos. 3 



Total 

 cals. 



450 



Cals. 



per 

 sq. m. 



1300 



Cals. 

 per 

 kilo. 

 71 1250 



68 1200 



Total 



cals. 



65 500 



400 



Pulse 

 rate 

 100 



CALORIES 



Kgs. 



No.160(F.) r 



CALORIES PER SO. 



TOTAL CALORIES 



\ 



WEIGHT 



FIG. 19. Body-weight, pulse-rate, and basal heat production'per 24 hours 



(Nos. 115, 123, 136, and 160). 



An examination of other charts, such as that for No. 113 (fig. 18) 

 and those for the younger children, shows similar general trends, 

 namely, low heat values on the bases of body-weight and body-surface, 

 with a gradual increase as the age advances from 7 months to 1 year. 

 Of special significance is the fact that these wide variations in the 



