PATHOLOGY. 49 



not having a free discharge, or by the improper 

 application of bandages. 



For the cure of these ulcers, it has been recom- 

 mended to use injections ; but they are often 

 found to produce too great irritation. 



Where we find bandages uselefs, or impofsible 

 to be applied, we must either use the seton, or lay 

 them completely open ; but when the seton can 

 be drawn through the sinus, so as to give a de- 

 pending orifice to the discharge, it is the best 

 means of procuring an union of the sides. 



On Fistulce. 



FISTULA most frequently occur to the horse 

 on the extremity of the neck, commonly called 

 pole evil, or on the withers ; but may take place 

 in any other part. 



FisTULiE is in general produced by bruises, 

 causing abscefs, and forming sinuses. 



When sinuses have been of long standing, the 

 granulations, on the inside surface, are very apt to 

 become unhealthy, and secrete a thinish discoloured 

 fluid, between ichor and pus, the orifices being 



D 



