MALIGNANT CORONITIS. 
275 
dressed by injection?, of solution of perchloride of mercury, and 
the external openings dusted with iodoform. The animal was 
also given a laxative, followed by powders of iron and arsenic 
internally. After ten days the setons were removed and the 
wounds rapidly closed. In three weeks, as the animal walked 
and trotted sound, she was put to work and behaved very well 
for about a month, when she again went lame and a swelling 
appeared upon the coronet about one inch and a half in front of 
the most forward original wound. Soon the swelling burst and 
the foot was apparently in worse shape than at first. The mare 
was cast and an anaesthetic given ; a section of the wall of the 
hoof was removed by sawing through about one inch from the 
ground surface and separating it above from coronary band and 
stripping it off. About one-third of the wall was removed in 
this manner ; the sinuses were then thoroughly curetted and 
cauterized with the thermo-cautery (which, by the way, is not 
a good instrument to use when part operated upon is very moist), 
and dressed with iodoform gauze, oakum and bandaged. After 
a week the patient was sent out to a pasture owned by a veter¬ 
inarian, who attended closely to the injury. This was in May. 
The following September the mare was shod with suitable shoes 
and put to work, and I have reason to believe that, with the ex¬ 
ception of a slight irregularity of the hoof, the patient has made 
a good recovery. 
Case II .—Grey gelding, aged, belonging to Little Sisters of 
the Poor, and used to draw a heavy carriage. This was a simi¬ 
lar case, and was operated on at once by the last method men¬ 
tioned. As there was apparently no improvement after two 
months treatment, and as the animal .was almost valueless, even 
when sound, destruction was advised. 
Case III .—Work horse, used for heavy draught, was oper¬ 
ated on by slitting the sinuses and passing hot iron through 
sinuses and out at the side of the wall and introducing seton 
for drainage, dressing with strong mercuric chloride solution. 
Case IV .—About same condition as Case No. Ill, and oper¬ 
ated upon by same method, both making a good recovery and 
