REPORT OF CASES. 
211 
From that day he had been very lame, and about forty-eight 
hours before its admission a flow of synovia had taken place 
through the wound some three inches below the hock. On ad¬ 
mission, the animal is found lame on three legs, the off hind ex¬ 
tremity, the seat of the injury, being much swollen from the foot 
above the middle of the hock. A wound is found below that 
joint with large granulations protruding and a flow of suppura¬ 
ting synovia flows freely from it. On account of the swelling 
and restiveness of the animal no crepitation could be detected, 
and a diagnosis of simple synovitis of the hock was made with a 
doubtful prognosis. For treatment the animal was placed in 
slings, and a constant cold irrigating apparatus applied to the 
part, but this was found so painful to the animal that it had to 
be stopped after three days. By this time a peculiar crepitation 
could be felt on the inside of the hock. Attempts to stop the 
flow of synovia were made with different agents, the repeated 
application of saturated solution of chloride of zinc proving 
most beneficial, but not sufficient, however, to stop it perma¬ 
nently. The appetite of the animal remained capricious, his 
pulse ranging from 75 to 50, and his temperature from 103J to 
101. The treatment was thus kept up until the first of June, 
when a severe blister was applied over the hock. The symptoms 
remaining the same, the crepitation is felt better on the inside of 
the hock only, the leg is considerable atrophied, so is the dorso 
lumbar region of that side. The blister having fallen off by the 
21st of June, and the general condition not having improved, 
the owner gave him up and he was destroyed. 
On post mortem the hock joint was found, on the outer side, 
the seat of an abundant plastic infiltration, so thick that careful 
dissection of the ligaments could not be made. The whole joint 
being boiled and the bones scraped of the soft tissues, a fracture 
of the external small metatarsal was exposed, extending oblique¬ 
ly from the upper part of the bone about one inch below the 
hock, and running upwards into the center of the articular sur¬ 
face of the superior extremity of the bone, entering therefore 
into the joint. The articular cartilages of that bone, that of the 
lower surface of the cuboid, of the superior extremity of the 
