480 VETERINARY SURGICAL THERAPEUTICS, 
amust be mentioned the bad formation of the foot, the vicious direction o 
the pastern, improper shoeing, heredity. Flat feet are much predisposec 
to sidebones. Tapon does not believe in the influence of heredity 
‘mentioned by the majority of authors; for him sidebones of colts an 
«due to permanent stabulation. 
The diagnosis of these troubles, like that of splints, is often difficult a 
“the beginning. All the Zameness of youth are not due to periostitis of the 
cannon; there are those which have for causes phalangeal periostitis o: 
incipient ossification of the cartilages, and sometimes a slight tumefactior 
of the pastern or coronet with an abnormal sensibility are scarcely detectec 
‘by careful exploration. 
The prognosis varies much according to the size of the growth, its origin 
its situation. If, in general, large exostosis produce stiffness or permanen 
ameness, there are many small ones which produce no pain, no func. 
tional disturbance. Periostosis produced by articular phlegmasias are, by 
the fact of the ankylosis which follows, extremely dangerous. In general 
-phalangeal exostosis which are limited, are specially serious when they are 
> situated low, interest the horny box, are within it; cartilaginous exostosi: 
~are so much more serious that they are more anterior. 
To pare the foot in such a manner that the standing of the digita 
region be firm and normal, apply a proper shoe (Coleman or bar shoe 
-according to the form of the foot), avoid excessive work, violent reactions or 
the pavement for young subjects, whose tissues are not yet fully developed | 
‘raise the colts in liberty: such are the principal indications of the pro 
“phylaxis of those tumors. Turning out would often be followed by the 
‘resolution of incipient sidebones. Tapon says that he saw three colts 
“kept in stabulation, have exostosis in two weeks; they were turned out, 
they disappeared on one, diminished on another and remained in the 
‘third. 
The therapeutics of these diseases includes numerous methods amon; 
which a choice must be made. Often one is consulted at,.their beginning 
when there exists only a little thickening, or an abnormal sensibility. Colc 
baths, continued irrigation, poultices, astringent applications, and res 
sometimes give good results; but blistering frictions are generally pre 
ferred. They hasten the march of the disease and shorten the duration 0 
‘the lameness. Ointment of bichromate of potasse has been beneficial wit! 
Feelen and Peuch. 
When the exostosis is formed, it is yet to alteratives that one must resort 
If blisterings may relieve the lameness due to a young tumor, made o 
spongy vascular tissue, they are generally powerless with old, hard anc 
“compact growths. Cauterization itself, though more powerful, is truly goor 
-only against recent growths; it is applied in lines, superficial or needli 
