DISEASES OF THE XJBINAEY ORGANS. 163 



(protractile) portion of the penis, that organ is to be withdrawn from 

 its sheath until the nodule is exposed and can be incised. If behind 

 the scrotum, the incision must be made in the median line between 

 the thighs and directly over the nodule, the skin having been rendered 

 tense by the fingers and thumb of the left hand. If the stone has 

 been arrested in the intrapelvic portion of the urethra, the incision 

 must be made beneath the anus and the calculus extracted with for- 

 ceps, as in stone in the bladder. The wound in the urethra may be 

 stitched up, and usually heals slowly but satisfactorily. Healing will 

 be favored by washing two or three times daily with a solution of a 

 teaspoonful of carbolic acid in a pint of water. 



Preputial calculus {calculus in the slieath, or Mlocular cavity). — 

 These are concretions in the sheath, though the term has been also 

 applied to the nodule of sebaceous matter which accumulates in the 

 blind pouches (bilocular cavity) by the sides of the papilla on the 

 end of the penis. Within the sheath the concretion may be a soft, 

 cheesy-like sebaceous matter, or a genuine calculus of carbonate, 

 oxalate, phosphate and sulphate of lime, carbonate of magnesia, and 

 organic matter. These are easily removed with the fingers, after 

 which the sheath should be washed out with castile soap and warm 

 water and smeared with sweet oil. 



