ON SHOEING. 61 



A quittor may also arise from the foot being 

 pricked in shoeing, and the matter forcing itself 

 through the coronet. 



When the ulcer has arrived at this state, the 

 orio:inal cause will be immaterial, the treatment 

 must be uniform in this particular, viz. to get to 

 the bottom of the sinus. The number, depth, 

 and direction of the sinuses may generally be 

 ascertained by the probe. 



If there is only one sinus, the orifice may 

 be enlarged with the knife, and some butter of 

 antimony may be introduced, at the same time 

 dressing the surface with common digestives; 

 but if there are more sinuses, and in a tortuous 

 direction, it will be necessary to lay the whole 

 open, and to cut away all the diseased part, 

 after which it becomes a simple wound. This 

 operation should be performed by a skilful hand, 

 as there is danger of injuring both the capsular 

 F 2 ligament 



