130 METABOLISM AND GROWTH FROM BIRTH TO PUBERTY. 



In studying these diagrams, we may ask: Is the metabolism of a 

 child of given height, age, and weight the same as that of another 

 child of the same height, age, and weight? Are there individual 

 differences in metabolism? What is the influence per se of height, 

 weight, age, and area on metabolism? What are the sex differences? 



Cals. 



per 

 sq. m. 



1275 



1175 



Total 

 cals. 

 600 1075 64 



700 975 58 



Kgs. 

 600 13 



500 11 



4QO 9 



No.166(F.)- 



No.158(M.)- 



Cals. 



per 

 sq. m. 



U75 



Total 

 cals. 

 800 975 58 



6mos. lyr. 



Total 

 cals. 

 800 1000 60 



700 900 54 



Kgs. 



600 14 48 



500 12 



Pulse 



rate 



400 10 100 



300 8 50 



6 mos. tyr. 



FIG. 21. Body-weight, pulse-rate, and basal heat production per 24 hours 



(Nos. 153, 155, 158, and 166). 



Alljthese problems may only adequately be studied by an intelligent 

 comparison of extensive series of metabolism measurements. The 

 individual curves show the general relationships between growth and 

 metabolism, but they give information only obscurely and indirectly 

 which may be used for a comparison of one child with another on the 

 basis of age, height, and weight, and throw no light on sex differences. 



