s can be kept in close proximity, their union may occur in
time. However, chances for partial recovery (which is the best to be
hoped for) are so remote that early destruction of the subject is the
humane and economical thing to do.

Where treatment is instituted, it is found that there is required a long
time for union of the fractured bones to occur (where union does take
place) and the cost of treatment together with the uncertainty of even
partial recovery, makes for an unfavorable outcome. When the best
possible results succeed treatment, a large callosity is formed and
movement of the pastern joint is restricted. Lameness, though not
intense, in the case referred to, where one bone was broken, was
permanent and the subject was out of service for nearly a year.

Inflammation of the Posterior Ligaments of the Pastern (Proximal
Interphalangeal) Joint.

Anatomy.--The ligaments here involved are the four volar ligaments
described by Sisson[24] as follows: "The _volar ligaments_ (Ligg
Volaria) consist of a central pair and a lateral and medial bands which
are attached below to the posterior margin of the proximal end of the
second phalanx and its complementary fibro-cartilage. The lateral and
medial ligaments are attached above to the middle of the borders of the
first phalanx, the central pair lower down and on the margin of the
triangular rough area."

This portion of the inhibitory apparatus is described by Strangeways'
Anatomy as two posterior ligaments which run each from three points on
the sides of the os suffraginis to a piece of fibro cartilage, described
as the glenoid cartilage, and attached to the postero-superior edge of
the os coronae; between them is the insertion of the inferior
sesamoidean ligament.

Etiology and Occurrence.--Everything tending to increase strain upon
these ligaments is contributory to possible fibrillary fracture of these
structures. Excessive leverage as furnished by long toes, long toe-calks
and low heels increases the normal tension on the posterior ligaments of
the pastern joint. Faulty conformation, which throws an abnormal strain
on these ligaments, is a predisposing cause of inflammation of these
structures. Hard pulling upon slippery and rough or frozen roads is a
common exciting cause of this injury. The condition is of comparatively
frequent occurrence and is seen affecting draft horses frequently, in
the hind legs.

Symptomatology.--Lameness is the first manifestati