502 



NAOKI SUGITA 



V. DISCUSSION 



From the study of table 3 and chart 1, it is seen that the 

 cerebrum of the albino rats does not increase in volume so as to 

 maintain the proportions present at birth, but that the rates 

 of increase differ a little in the several dimensions. 



The diameter W. B. has an almost fixed rate of increase gain- 

 ing a little less rapidly than the cube root of the brain weight 



TABLE 3 



Giving the brain weights for each brain weight group, the cube roots of the brain weights 

 and the linear measurements for width, length and height of the cerebrum. 



Albino rat 



