TESTICLE AS GLAND OF INTERNAL SECRETION 509 



Testicular Hormonic Deficiencies 



I. Congenital deficiencies 



1. Pure 



(a) Pure early, complete 



(&) Pure later, impotence development, from 30 to 45 ^ 



2. Mixed 



(a) Pituitary 

 (I) Thyroid 



(c) Thymus 



(d) General 



II. Acquired deficiencies 



1. Pure 



(a) Willfully, Mujerados, and Eunuchs 



(b) Excess normal function 



2. Mixed, congenital, and acquired types in other glands, involving 

 the testicle secondarily. 



Experimental Production of the Eunuchoid State in 

 White Leghorn Cockerels 



These birds were all the same age and were operated upon at the same 

 age. Photos were taken at practically the same age. 



Fig. 14. Note the development of ,the 

 comb, wattles, head, ear-lobe, and' tail in 

 the normal unoperated bird 1. 



Fig. 15. Note that in bird 2 which has 

 one-fourth of the testicular volume re- 

 maining after operation that the comb, 

 wattles, head, and ear-lobes are much 

 less developed than in bird 1, and that 

 the tail still retains its adolescent char- 

 acteristics. 



