68 THE EVOLUTION OF MAN 



after birth, the postnatal retardation. During the first year, 

 growth in both weight and height is rapid the boy increasing 



AGE 

 o 5 



10 



is 



YEARS 

 SO 25 



70 



60 



50 



3O 



.-VX 



Males 

 Females 



I4O 



too 



80 



60 



FIG. 25. GROWTH CURVES FOR INCREASE IN 

 WEIGHT AND STATURE FOR 



BOTH SEXES 

 From Donaldson, after Roberts. 



