PLATE VI 



'*H^ 





so 



40 

 30 

 20 

 lO 



B 



EFFECT OF CASTRATION AND TESTOSTERONE ON BULL SEMINAL VESICLES 



Histological sections from a tubule (mag. x 437), and the fructose content 

 of seminal vesicle. 



A. from a bull-calf castrated when three weeks old, and killed when nine 



months old. 



B. from a bull-calf castrated when three weeks old, left untreated till 



eight months old, and then implanted with testosterone (0-5 g.); 

 killed one month later, simultaneously with calf A. 



