ARTHRITIS— GOUT. 
322 
hock, the synovial membrane of the sheath of the perforans was 
sound in the midst of the infiltrated tissues. All the articulations 
of the hock appeared to be healthy interiorly, but the ligaments 
and other tissues that surrounded them participated in the infil- 
tration. Between the bifemoro calcaneus (the gastrocnemius 
externus) and the tendon of the perforans, was a small concretion, 
soft, yellow, easily crushed, surrounded by a yellow, gelatinous 
infiltration, and of an encephaloid character. 
The inflammation of the fore-legs was much less acute — the 
synovial membranes of the bones of the carpi had not undergone 
any change, and it was the same with the articular capsules of 
the metacarpal bones. The right leg presented no lesion what- 
ever, except a little redness of the inter-tendinous cellular tissue. 
There are some very striking analogies between this case and 
that related by M. Ollivier. In both, the disease followed or 
was the consequence of over-fatigue, produced in the mule by 
extra-work, and in the horse from being compelled to stand during 
so long a period. In both animals the attack was sudden, wan- 
dering pains in the limb causing considerable lameness, and 
which was united to a fever of reaction that was mistaken for 
founder. In both of them the pain commenced in the fetlock of 
the left leg, and spread to the other limbs, always attacking first, 
although not confined to, the fetlock. There were the sameaffec- 
tions of the kidneys and the heart in both cases ; and, lastly, in 
both of them the inflammation spread from the fetlock joint to 
the sheaths of the tendons, and then death speedily followed. 
There were also several analogies in the post-mortem lesions. 
The sheaths of the tendons and the articulations of the fetlocks 
presented nearly the same appearances in both. In the one and 
the other the character of the synovial fluid was altered — it was 
thickened, coloured, and heterogeneous; and the membranes by 
which it was secreted presented traces of most acute inflamma- 
tion. A yellow infiltration was observed about the ligaments and 
tendons that surrounded the articulations of the fetlock, and in 
the second case this infiltration extended to above the hock in 
the hind limbs, and into the interstices of the surrounding ten- 
dinous and ligamentous tissues. There were also, in both the 
mule and the horse, lesions which indicated that the kidneys had 
been the seat of inflammation, and the same alterations were 
found in the heart of each. 
This coincidence of affections of the articulations of the fetlock, 
with others of the kidneys and the heart, appear to M. Ollivier 
and ourselves to have no inconsiderable resemblance to the group 
of symptoms which we have often observed in the human being 
in certain rheumatic affections, and particularly with that variety 
