BY DR. KLEIN. 149 



have already borne young. The fresh organ is placed in 

 common alcohol or dilute chromic acid, without opening it; 

 after four or five daj's it is tit for making sections. Each 

 gland consists of long blind tubes, which may be either single 

 or divided. The glands are closety packed together. In each 

 tube two parts may be distinguished ; one of these, which may 

 be regarded as the duct, is straight, and possesses an epithe- 

 lium of slender pale cylindrical elements. The gland proper 

 is convoluted, and consists of shorter elements. If the sec- 

 tions are steeped twenty-four hours in very dilute carmine, it 

 is seen that this epithelium is much more stained than that of 

 the duct. In the sow's uterus, and in those of the rabbit and 

 mouse, it can be made out that the epithelium is ciliated. 



The glands can be best prepared in lengths from the preg- 

 nant uterus of the sow. For the mode of preparation see 

 Chapter III., p. 60. It is scarcely necessary to observe that 

 for the study of the external organs, injected preparations are 

 important. 



Male Genital Organs. The general structural relations 

 of the testis and epididymis are best studied in sections of 

 fresh organs (frog or mammalia), hardened in common alco- 

 hol ; these must be stained and prepared in Dammar varnish 

 in the usual way. Preparations with the bloodvessels and 

 lymphatics injected must also be used. The latter are easily 

 obtained by the method of puncture. The characteristic epi- 

 thelium of the epididymis must be seen in fresh preparations 

 in serum, as well as in sections. The structure of the vasa 

 deferentia, vesiculse seminales, prostate, urethra, and penis, 

 may be all studied in the organs of the foetus or of children, 

 after hardening in chromic acid. The structure of the erectile 

 tissues cannot be demonstrated without good injected prepa- 

 rations. [For details see the author's paper in Strieker's 

 Hand-book.] 



