INCREASE OF THE BRAIN IN WEIGHT. 



should show that the approximation of the curves at 

 fourteen years was really significant. Again, the pre- 

 maximal rise in weight is to be noted, but its meaning 



B 10 



16 IS 



YEARS 

 20 2Z 2-4 



J300 



1400 



12CO 



1000 



800 



600 



4-00 



200 



V 



Mc-lc* 



Ter t icdt s 



FIG. 17. Curves showing the variations in brain-weight 

 during the first twenty-five years of life. Based on 

 Table 17. 



has already been discussed. Should this curve be 

 extended to ninety years, there would be found nearly 



