the entire fetlock region is thoroughly vesicated and,
as soon as the skin has recovered from the effects of the vesicant,
pressure bandages may be employed. In these cases, subjects may be put
into service after all swelling which the injection or the vesicant has
produced has subsided. The pressure bandages are used at night or during
the time that the horse is in its stall and they are not worn by the
subject while at work.

Where no marked swelling occurs within ten days, as the result of the
injection of iodin, the injection may be repeated and, if thought
necessary, the quantity may be materially increased. If swelling does
not occur it is indicative that no particular irritation has been
caused.

Some swelling is desirable and much swelling sometimes results and
persists for weeks. This is not in any way likely to cause permanent
trouble; and if the technic of injection is skilfully executed no
infection will follow.

By persistent and careful use of suitable elastic bandages, the support
thus given the parts, together with the absorption of products of
inflammation which constant pressure occasions, some chronic cases of
synovial distension of tendon sheaths recover in two or three months and
this without other treatment. Such good results are not to be expected
in aged subjects, nor in horses having at the same time, chronic
lymphangitis.

Where bandages of pure rubber are employed great care is necessary, if
one is not experienced in their use, lest necrosis result. Where
bandages are uncomfortably tight the subject will manifest discomfort,
and an attendant should observe the animal at intervals for a few hours
(where there may be some doubt as to the degree of pressure which is
exerted by elastic bandages) and readjustment made before any harm is
done.

Arthritis of the Fetlock Joint.

Anatomy.--The anatomy of the metacarpophalangeal articulation is
briefly reviewed on page 58 under the heading of "Anatomo-Physiological
Review of Parts of the Foreleg."

Etiology and Occurrence.--The chief causes of non-infective arthritis
of the fetlock joint are irritations from concussion and contusions due
to interfering. The condition occurs in young animals that are
over-driven in livery service or other similar exhausting work, where
they become so weary that serious injury is done these parts by striking
the pasterns with the feet--interfering. In these "leg-weary" animals,
that are always kept shod with