sary removed, and the bone curetted with a Volkmann's spoon; or, if
showing itself as a sequestrum, removed with a scalpel and a strong pair
of forceps. Care must be taken that every particle of the diseased bone
is removed, and that no part of it is left to act as an after-source of
irritation. With removal of the diseased portion and a strict attention to
antisepsis healing soon takes place.

_Reported Cases of Periostitis and Ostitis_.--1. 'Figs. 150 and 151
represent the phalangeal bones of the off fore-leg of a thoroughbred horse
named Osman, who was well known as a hunt steeplechaser of considerable
merit in the Midland counties some twenty years ago. I may say that this
horse was under my observation pretty regularly during the whole of his
career, and up to the time of his death, from ruptured aorta, when eight
years old. My attention was called to him as a yearling by his owner, who
told me that he sometimes fancied the colt was lame. I went over to see
him, and found that he was unmistakably lame on the off fore-leg. Careful
examination showed no heat or enlargement anywhere. I advised rest and the
colt became pretty sound, though not quite so--in fact, he never did become
quite sound, and sometimes he was very lame indeed.

[Illustration: FIG. 150.--EFFECTS OF PERIOSTITIS ON THE PEDAL AND NAVICULAR
BONES.]

'Every imaginable sort of treatment was tried short of neurectomy, without
avail. The curious part of the case was that there never was much heat or
any apparent change of structure, nor was "pointing" a very noticeable
feature. The foot always remained a good-looking one. As the horse won a
good number of races he was of some value, and was seen by a good many
members of the profession, who were by no means unanimous as to the cause
of lameness. The favourite theory was that it was a sequence of "split
pastern." A post-mortem examination showed that there was no fracture.
There was no adherence of the tendon to the navicular bone nor any
ulceration. The morbid changes consisted entirely of osseous deposit as
shown in the photographs. The under surface of the navicular bone was much
enlarged and roughened by this bony deposit, which extended on to the os
pedis, causing complete anchylosis at each extremity of the navicular. The
lateral cartilages were healthy. The interesting points in connection with
the case are the insidious commencement of osseous disease, its extensive
development, and the entire abs