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posed and can be incised. If behind the scrotum, the incision must be 

 made in the mediaa 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 intra-pelvic 

 portion of the urethra, the incision must be made beneath the anus and 

 the calculus extracted with forceps, 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. 



Pre])utial calculus. — Galciihis in the sheath or bilocular 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, phos- 

 phate 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. 



