UPPER EXTREMITY. 26 Y 



near its posterior surface, and rolls between the finger and 

 thumb searching for it in the substance of the cord. 



The epididymis can be felt as a dense, oblong body, 

 situated at the upper and -back part of the testis ; its posi- 

 tion is, however, variable. It may lie in apposition with 

 the lower border of the testis, and constitute what has 

 been called " inversion of the testis." Its relations with 

 the testis and with the spermatic cord should be carefully 

 appreciated. 



The external conformation of the genital organs should 

 be studied ; especially the variable degree of development 

 characterizing the frenum preputii, and the greater depen- 

 dence of the left testicle than the right, by which their 

 mobility is increased and their liability to be compressed, 

 one against the other, by the thighs, is diminished. The 

 introduction of the catheter should be practised. 



In the female the vulva is to be examined, and the vagi- 

 nal exploration of the os uteri practised. The meat us of 

 the female urethra is situated about half an inch below the 

 clitoris, just above the protruding border of mucous mem- 

 brane forming the orifice of the vagina. The lips of the 

 meatus offer a small tubercle to the touch. The introduc- 

 tion of the female catheter, without the aid of sight, should 

 be repeatedly performed. 



The prostate may be felt, as a rounded and dense body, 

 shaped like a chestnut, situated at the neck of the bladder, 

 on introducing the fore finger, oiled, into the rectum, as far 

 up as it can reach. It lies between the rectum and the 

 symphysis pubes. Its dimensions vary, and measurements, 

 as regards its size, are arbitrary. In early life it is small, 

 in old age it is hypertrophied. Behind this organ, "in the 

 median line, the over-distended bladder may be punctured 

 through the rectum. 



UPPER EXTREMITY. 



The greater tuber osity of the humerus is on a line with 

 the external condyle of the same bone. 



The cephalic vein, and the inferior acromial branch of 

 the thoracica acromialis artery, lie in the depression which 

 marks the interval between the pectoralis major and del- 

 toid muscles. 



The axillary artery traverses the axilla nearer to the 

 anterior than the posterior border of that space. Dividing 

 the axilla, longitudinally, into thirds, the line of union 



