S 3 



REACTION TO STEROID HORMONES 



Latent period, i hour. Linear growth ends after 4^ 

 hours. Growth continues to some extent after this. 



b. Allo-pregnanedione, ^-20. With concentrations of 

 5, 10, 20, 50, 100 and 150 y per 750 ml water the follow- 

 ing growth-curves were obtained (Fig. 9). The character- 

 istics of these curves are:— 



Latent period, i hour. Linear growth ends after 4 hours. 



02460246 



hours 



Fig. 9. Ovipositor growth curves after administration of 



allo-pregnanedione, 3-20. 



Fig. 10. Ovipositor growth curves after administration of 

 allo-pregnanol-3-one-20. 



