LAMENESS, FROM VARIOUS CAUSES. 363 
bones ar cvncerned ; yet, like spavin, ring-bone, and various other 
diseases, it is accompanied, in certain stages, by pain and lameness, 
and our services as physicians are only secured in view of remoy- 
ing this pain and lameness, so that the animal may be enabled to 
perform the ordinary equine duties. This is what some persons 
please to term a cure, whereas it almost always happens that some 
alteration in the structure of the parts remains, which actually 
renders the horse unsound, because he has that about him which 
may, from overwork or other exciting causes, impair his useful- 
ness, 
VW 
\ 
Hi 
HTT 
\ CM ANNA 
THE PATELLA, OR STIFLE BONE. 
Phis cut shows the appearance of disease on articulatory surfaces when the animal is the 
subject of Osteo Porosis, or Big Head. 
As regards the “alarming” features of big head or big jaw, we 
would inform the reader that almost every lame horse examined 
by us, during a period of six months, in Ohio, had either one or 
the other jaw enlarged. In some cases one angle of the lower jaw 
was the seat of thickening and enlargement, but among the majority 
both angles were affected. These remarks do not apply to other 
obvious or accidental lamenesses which are constantly occurring. 
A short time ago we visited, in company with a practicing vet- 
erinarian whose attention had never been called to this affection, 
three horses, the subjects of lameness, which was said to be occa- 
sioned by eating Hungarian grass. To the astonishment of the 
parties concerned, we demonstrated that they were all the subjects 
of enlargements of the lower jaws. From the history of the cases, 
