FISTULOUS WITHERS. 



355 



mentous tissue covering the sides of the superior spinous process of 

 the third dorsal vertebra became necrotic. 



The mare was left in hospital on the 5th March. At that date the 

 dead tissue was removed. The dressings used were 3 per cent, creolin, 

 tincture of iodine, iodoform, and iodoform gauze. 



On the i2th March the skin was seen to have become separated 

 over the median line in front of the superior spinous process of the 

 third dorsal vertebra, where a smooth spot appeared. Treatment was 

 continued until the 28th March without much improvement. At that 



Fig. 34. 



date marked swelling appeared in front of the wound, pointing to 

 recurrence of necrosis in the supra-spinous ligament. We determined 

 not to operate further, but to continue the antiseptic treatment. 



From the ist to the 15th April the wound did not show the slightest 

 improvement. Towards the back for a distance of about six inches 

 it was healing, but the separation of the skin and the swelling around 

 the anterior angle caused us to fear that necrosis was extending in the 

 supra-spinous ligament. 



