SUSCEPTIBILITY TO TRANSPLANTABLE TUMORS 105 



The normal male curve approaches zero, whereas the castrated 

 curve after rising remains at a fixed level, a few males continuing 

 to grow the tumor tissue progressively. 



NORMAL MALES 



21 



OONADECTOMIZED 



WEEKS r 



Figures 20 and 21 



In this particular, the females behave the same as the males 

 although they are not so striking (fig. 20, light, sohd, and dotted 



