■Ratio 



50 50 100 



200 OOO 



0.5 



0.0 



25 



5050 



200 



>300 



400 



35 



2.5 



S..0 



0.5 



0.0 



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 15G. x x, 



males; o o, females. 



274 



