INTERNAL SECRETIONS OF SEXUAL GLANDS 83 



the graft took and remained and was observed functioning 

 for more than nine months. The operation was made by 

 Steinach (1916, p. 312) in such a way as to guarantee a good 

 vascularization of the graft. Both testicles were fixed on to 

 the peritoneum or the abdominal muscles, the funiculus 

 spermaticus remaining intact ; a few days later the connection 

 with the funiculus was cut. Similar grafts may remain even 

 for the whole life of the animal. Auto- and homoiotransplanta- 

 tions on guinea pigs and rats were made by Sand (1918), who 



Fig. 46. — Male vat, 8 months old, with testicular autotvans- 

 plantation at an age of i month. Compare with 

 Figs. 7 to 9. Prostate, seminal vesicles and penis 

 developed as in normal animal of same age. Explan. 

 signs as in Fig. 7. — From Steinach. 



succeeded especially when puncturing the graft with a needle; 

 evidently this method assures a better vascularization. 



In view of the experiments performed there can be no doubt 

 that an animal in which the testicles were removed at an early 

 age and to which simultaneously its own testicles or those 

 from another animal were engrafted and took in the new place, 

 can develop in a normal way in regard to somatic and func- 

 tional sexual characters. The prostatic gland, the vesiculae 

 seminales and the penis in such animals are found to be as 

 large as in normal ones (Fig. 46). 



