§ 3 



REACTION TO STEROID HORMONES 



19 



Latent period, i hour. Growth ceases after 10 hours. 



b. A4,^-andtostenol- 1 7 -trans-one-^ (trans-testosterone) . 

 With concentrations of Ys, }i, Yz, i and 2 mg per 750 ml 

 water the following growth-curves were obtained (Fig. 21 ).^ 

 The characteristics of these curves are:— 



Fig. 21. Ovipositor growth curves after administration of 

 trans- testosterone. 



Latent period, 2 hours. Growth ceases after 10 hours. 



c. A ^,6'androstenol- ^-trans-one- 1 y ( trans- dehydr oan- 

 drosterone). With concentrations of }i, Yz, i and 2 mg per 

 750 ml water the following growth-curves were obtained 

 (Fig. 22). The characteristics of these curves are:- 



Latent period, i hour. With higher concentration growth 

 continues for more than 1 2 hours. 



d. A ^,6-androstene- 3-trans, 17-trans-diol. With concen- 

 trations of 20 y, V16' >^, >4. >^ and I mg per 750 ml water 

 the following growth-curves were obtained (Fig. 23). The 

 characteristics of these curves are:— 



Latent period, i hour. With higher concentrations, growth 

 continues after 12 hours. 



