Ratio 



Ratio 



Z5 



SO 5O IOO 



OO 



3OO 



4OO 



5O5O 



IOO 2OO 



3OO 



4OO 



4.0 



3.5 



3.0 



2.5 



2,0 



1.5 



0.5 



QO 



Chart 49 nos. 18-20. Showing the changes in the relative percentage weights 



of the thymus, testes and ovaries based on the data in table 156. x x, 



males; o o, females. 



274 



