175 
CASE navicular lameness. 
bar shoe, chambered at the inner quarter, and kept easy on the 
frog, which, with two or three days’ rest, and the application of 
the infusum lyttae rubbed into the coronet, he got quite sound. 
He was always after shod with a bar shoe, and continued doing 
his work as well as any ordinary horse up to June L, 1828, a pe¬ 
riod nearly of three years, when he again came in lame on the 
same foot, which I examined, and found a little inflamed, and 
nearly all the inner lateral cartilage diseased. Shoe taken off; 
foot poulticed up to the 6th, when the shoe was again nailed on. 
Ran him out in hand; no better.—7th, Fired and blistered the 
coronet. Two weeks after the blister was repeated; still no ap¬ 
pearance of any amendment. Having succeeded veiy often, in 
the course of practice, in getting horses sound when their carti¬ 
lages became diseased, by treating them as here stated, I was 
very much disappointed in not being able to make him again use¬ 
ful. The owner would not consent to have him unnerved; and I 
gave up the case as hopeless, being convinced, from the nature of 
his lameness, that the navicular joint had become diseased, and 
a circumstance occurred which confirmed me in my opinion. 
Press of business having obliged the proprietor of the horse to 
send him a distance of seventeen miles with a carriage, and being 
hard driven, and not in condition to undergo violent exertion, he 
was seized with acute founder, of which he died in six days. 
Post Mortem Appearances. 
Separation had taken place between the horny and sensitive 
foot; congestion in the blood-vessels of the sole ; lateral and in¬ 
ferior cartilages on the inner side ossified, and formed a bony case 
for a portion of the flexor tendon near its insertion. The laminae 
on both sides of the coffin-bone in an osseous state, particularly 
those on the inner side. The inferior surface of the navicular 
bone had a dark red spot on its centre, and very small bony spi- 
culae beginning to shoot through the articulating cartilage. 
Remarks. 
From the healthy state the navicular cavity was otherwise in, 
it appeared to me to be of a more recent nature than any of the 
other diseased parts; and there cannot be a doubt that it w as the 
cause of his lameness. 
What struck me at the dissection as being very remarkable, 
was, that the horse was able to do his work so well, with the car¬ 
tilages and laminae in such a diseased state; and that such a small 
spot of derangement in the navicular membrane should have 
produced so much pain and lameness to the animal, and baffled 
every effort to give relief. 
