cavity below the opening, a cartilaginous quittor is in the course of
development.

_Treatment._--Hot baths and poultices are to be used until the presence
of pus can be determined, when the tumor is to be opened with a knife or
sharp-pointed iron heated white hot. The hot baths and poultices are now
continued for a few days or until the entire slough has come away and
the discharge is diminished, when dressings recommended in the treatment
for cutaneous quittor are to be used until recovery is completed. In
cases in which the discharge comes from a cleft between the upper border
of the hoof and the coronary band, always pare away the loosened horn,
so that the soft tissues beneath are fully exposed, care being taken not
to injure the healthy parts. This operation permits of a thorough
inspection of the diseased parts, the easy removal of all gangrenous
tissue, and a better application of the necessary remedies and
dressings. The only objection to the operation is that the patient is
prevented from being early returned to work.

When the probe shows that pus has collected under the coffin bone the
sole must be pared through, and, if caries of the bone is present, the
dead parts cut away. After either of these operations the wound is to be
dressed with the oakum balls, saturated in the bichlorid of mercury
solution, as previously directed, and the bandages tightly applied.
Generally the discharge for the first two or three days is so great that
the dressings need to be changed every 24 hours; but when the discharge
diminishes, the dressing may be left on from one to two weeks. Before
the patient is returned to work, a bar shoe should be applied, since the
removed quarter or heel can only be made perfect again by a new growth
from the coronary band.

Tendinous or cartilaginous complications are to be treated as directed
under those headings.

CARTILAGINOUS QUITTOR.

This form of quittor may commence as a primary inflammation of the
lateral cartilage, but in the great majority of cases it appears as a
sequel to cutaneous or subhorny quittor. It may affect either the fore
or hind feet, but is most commonly seen in the former. As a rule, it
attacks but one foot at a time, and but one of the cartilages, generally
the inner one. It is always a serious affection for the reason that, in
many cases, it can only be cured by a surgical operation, requiring a
thorough knowledge of the anatomy of the parts involved, and much