INTERNAL SECRETION OF TESTICLE 



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Fig, 76. — Section through testicle which 8 months previously 

 had been subjected to autotransplantation [rat). ;x 100. 

 From the same litter as Fig. 77. No spermatogenesis. 

 Hypertrophy of interstitial tissue. — From Steinach. 



149 



Fig. jy.— Section through normal testicle of a rat about 

 g months old. x 100. Complete spermatogenesis ; 

 small quantity of interstitial cells. — From 

 Steinach. 



