fforts to avoid
slipping. In runaways, it sometimes occurs where sharp-edged implements
are bounced against the legs in such fashion that division of the tendon
results.

Symptomatology.--With division of the tendo Achillis or of the
musculature of the gastroenemii and the superficial flexor
(perforatus), there remains nothing to inhibit tarsal flexion except the
deep flexor tendon (perforans) and this does not support the leg. When
attempt is made to sustain weight with the affected member, abnormal
flexion of the tarsus takes place and the hock sinks almost to the
ground. The symptoms are so characteristic that recognition is always
easy even in case no wound of the skin exists.

Prognosis.--Spontaneous recoveries occur and such cases are reported
by Bouley who is quoted by Cadiot as having observed division of the
tendo Achillis due to a sword wound wherein at the end of four months
recovery was complete. Division of this tendon in brood mares has been
practiced by the early settlers of parts of the United States for the
purpose of preventing their straying too far from home. In such
instances one leg only was so mutilated and in most instances, it is
reported that spontaneous recovery took place.

In unilateral involvement without complications, the prognosis is not
unfavorable if provisions for giving necessary attention are available.

Treatment.--The subject is to be confined in a sling and the member
bandaged and supported by means of leather splints. Immobilization as
for fracture is not necessary but, nevertheless, movement is to be
restricted as much as possible. In case of open wounds, the exposed
tissues are cared for along general surgical lines. Where the divided
parts of the tendon are maintained in fairly close and constant
relation, granulation of tissue, sufficient to sustain weight takes
place in from six weeks to three months.

Spring-Halt. (String-Halt.)

Occurrence.--This condition is a myoclonic affection of the hind leg
which is discussed in works on theory and practice under the head of
neuroses, but the cause or causes have not been established. Theories
that heredity is responsible have their supporters and advocates of
hypotheses attributing it to disease of the sciatic nerve, patellar
subluxation, fascial contraction of various muscles, "dry spavin"
(tarsal arthritis), iliac exostoses, disease of the foot and contraction
of the hoof, are on record in veterinary literature. This ail