318 
W. D. CRITCHERSON. 
the bar. A double-edged sage knife was then used to make a 
superficial incision about one-quarter of an inch below the coro¬ 
nary band, extending from the posterior portion of the cartilage 
at the heel forward, thus preserving the coronary baud intact, 
and preventing the possibility of a quarter crack following the 
operation. The same instrument was then inserted at the middle 
of the incision, with the point turned inward; and, while being 
carefully guarded by the hand, in order that the skin covering 
the parts might not be injured during the struggles of the animal, 
it was moved forward, backward and upward. The tissues cov¬ 
ering the parts being thus divided, a right-hand sage knife was 
then introduced, and its edge carried upward till it reached the 
upper border of the cartilage. Then, by turning the blade over 
the cartilage, with its cutting edge directed outward, the point of 
the instrument being brought out first, the entire posterior portion 
of the cartilage was removed. The remaining portion was 
removed in the same manner. (The entire cartilage was under¬ 
going ossification). This was followed by a slight amount of 
hemorrhage. 
There was then discovered, upon introducing the probe, a 
track, commencing at the anterior third of the base of the carti¬ 
lage, and extending downward, between the folds of the podophy- 
lous lamina, to the lateral surface of the os pedis, which could 
be felt as a roughened surface under the probe. The congested 
and infiltrated lamina was cut away, exposing a piece of gangre¬ 
nous tissue the size of a pea. This being removed, the rough¬ 
ened surface of the bone, due to the extension of the inflamma¬ 
tory process which had been going on in the cartilage, was 
observed. The bone was scraped, and a smooth surface of all 
the tissues involved having been obtained, the wound was dressed 
wit 1 ' carbolic solution (1 to 40) and oakum. A bandage with 
moderate pressure was applied, and over all a piece of sacking. 
The cord was then removed from the fetlock, also the liobblesj 
and the animal allowed to get up. She walked to the stall better 
than when led out for the operation. The foot was immediately 
placed in water, and remained in soak till the next morning. 
May 19th, 8 o’clock, a. m. There is slight reacting fever. 
