THE ORGANS OF REPRODUCTION" 105 



people by the resuscitation and renewal of the 

 weakening secondary characters." We shall see 

 that Dr. Voronoff selected the more difficult graft- 

 ing procedure. 



"The operation is a very simple one," writes Dr. 

 Steinach; "absolutely painless. Quite free of any 

 risk whatever. Takes no longer than fifteen min- 

 utes to perform. Seven to ten days in the hospital 

 are all that's needed afterwards. But the opera- 

 tion must be performed with minute precision ; and 

 for that reason I cannot guarantee results unless 

 I am personally present." 



With the help of a local anesthetic a small in- 

 cision is made and the vas deferens tied and cut off. 

 Care is taken not to injure the blood vessels near 

 by. The result is that the seminal vesicle (either 

 one of the two reservoirs for the semen) and the 

 interstitial gland are completely cut off from one 

 another ; and this in turn gives rise to a multiplica- 

 tion of the interstitial cells, and to an increase of 

 the hormone produced by them. 



Professor Steinach has performed the operation 

 on men on several occasions. In some instances 

 these men were fairly young but physically weak; 

 in others, the subjects were senile men. "The ap- 

 pearance of the subjects became youngish, fresh, 

 their bodily strength increased, the tremor of their 

 hand disappeared, memory and will power re- 

 turned, and the sexual power was restored." 



