80 



ANATOMY 



Beginning at birth, nineteen age groups were studied. The 

 brains were fixed in Bouin's fluid and prepared by a uniform 

 technique. The final measurements were corrected for the ef- 



TABLE 46 



Showing the calculated callosal area at different ages of the albino rat. Data on 



standard body weight are taken from table 157 and the calculated callosal area 



determined by formula (11). 



fects of the treatment so as to give values which apply to the 

 fresh cortex. These are entered in table 47 and shown graphi- 

 cally in chart 9. The heavy line A in chart 9 shows that the 

 final average thickness of the cortex is nearly attained at a brain 



