o judge as to this part of the work,
but one may consider that a quantity between three and ten cubic
centimeters of equal parts of tincture of iodin and alcohol constitutes
the proper amount to employ. Where much synovia is contained within the
sheath at the time of injection, there occurs great dilution of the
agent injected and consequently less irritation results.

The object of such injections is to check synovial secretion, and this
is sought by the local effect of iodin in contact with the secreting
cells together with the reactionary swelling which occasions pressure.
An increase in the local blood supply also follows. In all cases where
it is possible to employ suitable bandages, this should be done. The
ordinary derby bandages serve well and if their use is continued for a
sufficient length of time, good results follow.

There are other methods of treating these affections, and each has its
advantages and disadvantages. Line-firing, instead of the vesicant is
made use of by some, but the object desired is the same and results
obtained are similar.

Sheaths may be opened surgically by means of a knife, and the removal of
a portion of the wall of distended and atonic tendon sheaths is
possible. These operations belong to the realm of surgery and are not
properly a part of this treatise. However, in passing, it may be said
that if a perfect technic is possible in doing the last named
operation, a permanent recovery is the outcome.

Fracture of the Metacarpus.

Etiology and Occurrence.--As the result of all sorts of violence, such
as falls and injuries in accidents of various kinds wherein the
metacarpals are subjected to contusions, fractures may result. In the
horse it is unusual for fracture of one of the small metacarpal bones to
take place without there being at the same time a fracture of the third
(large) metacarpal bone.

Classification.--Fractures of the metacarpal bones as they occur, are
as likely to be compound as simple, and the multiple and comminuted
varieties are occasionally observed. The manner in which the third
(large) metacarpus is fractured, largely determines the outcome in any
given case.

Symptomatology.--Abnormal mobility of the broken parts of bone and
crepitation mark fracture of the metacarpus, and the condition is easily
diagnosed. In many instances, when compound fracture exists, broken ends
of bone are protruding through the skin. No weight is borne upon the
fractured mem