§ 3 



REACTION TO STEROID HORMONES 

 .A.U. 



25 



Fig. 31. Ovipositor growth curves after administration of 

 testosterone-propionate. 



On considering again the relation between the activity and 

 the chemical constitution of the first 10 substances dealt 

 with, we concluded that if one regards the two growing 

 phases which, for androgenic substances, are expressed so 



