i62 INTERNAL SECRETIONS 



function even when the testicular mass is greatly reduced 

 (Lipschutz, 1922 d, 1923 b). 



Yet the fact remains that in many animals at any rate an 

 hypertrophy of the interstitial cells takes place, and that the 

 number and the size of the interstitial cells are really increased 



«»>^&|. •'^^ 



^t 



■7^%*t 







*:^:V 













1 ti' ' •i--.' 



Fig. 86. — Section through testicle oj rabbit 14 months 

 old, unilaterally castrated when i|- months old (Prot. 

 Nr. 86). X 280. The biggest testicle we observed 

 in rabbits ; the weight was 3 -8 gr. Normal quantity 

 of interstitial cells. To be compared with Fig. 52. 

 — Prepar. of Wagner; photo of Kull. 



under different conditions affecting the testicle. If now the 

 interstitial cells are an endocrine apparatus, one might suppose 

 that under conditions of hypertrophy there should be also 

 an increased hormonic action. As already mentioned above, 

 Steinach records having observed an abnormally great sexual 



