1 64 



INTERNAL SECRETIONS 



pharmacological observations a negative answer is arrived at. 

 We know that if an excess of certain compounds which play 

 a part in the metabolism is introduced into the organism, 

 this excess will be oxidized or excreted, as, for instance, pro- 

 teins and salts of which only small quantities can be stored. 



Fig. 87. — Section through testicle of rabbit, 8 months old, with eunuchoid penis 

 (Prot. Nr. 41, same litter as Fig. 66; horizontal incisions on the testicle at 

 age of 2 months). Seminal tubules in a state of degeneration; they 

 seem to be less developed than in Fig. 66. Interstitial cells of extraordin- 

 ary dimensions packed, full evidently with fat. — Prepar of Wagner; 

 design of Lehbert. 



Although these substances, such as amino-acids or some ions, 

 have definite biochemical properties, their introduction in 

 increased quantity does not necessarily augment these functions 

 or affect the metabolism in general, provided that certain 

 limits are not surpassed; all we observe is that in such cases 



