pidity,
and from their nature this disease is sometimes known as "dumminess" or
"immobility." A horse so afflicted is called a "dummy." Among the
symptoms are loss of intelligence, stupid expression, poor memory, etc.
The appetite is irregular; the horse may stop chewing with a wisp of hay
protruding from his lips; he seems to forget that it is there. Unnatural
positions are sometimes assumed, the legs being placed in clumsy and
unusual attitudes. Such horses are difficult to drive, as they do not
respond readily to the word, to pressure of the bit, or to the whip.
Gradually the pulse becomes weaker, respiration becomes faster, and the
subject loses weight. Occasionally there are periods of great excitement
due to temporary congestion of the brain. At such times the horse
becomes quite uncontrollable. A horse so afflicted is said to have
"staggers." The outlook for recovery is not good.

Treatment is merely palliative. Regular work or exercise and nutritious
feed easy of digestion, with plenty of fresh water, are strongly
indicated. Intensive feeding should not be practiced. The bowels should
be kept open by the use of appropriate diet or by the use of small
regular doses of Glauber's salt.

TUMORS WITHIN THE CRANIUM.

Tumors within the cranial cavity and the brain occur not infrequently,
and give rise to a variety of symptoms, imperfect control of voluntary
movement, local paralysis, epilepsy, etc. Among the more common tumors
are the following:

Osseous tumors, growing from the walls of the cranium, are not very
uncommon.

Dentigerous cysts, containing a formation identical to that of a tooth,
growing from the temporal bone, sometimes are found lying loose within
the cranium.

Tumors of the choroid plexus, known as brain sand, are frequently met
with on post-mortem examinations, but seldom give rise to any
appreciable symptoms during life. They are found in horses at all ages,
and are slow of development. They are found in one or both of the
lateral ventricles, enveloped in the folds of the choroid plexus.

Melanotic tumors have been found in the brain and meninges in the form
of small, black nodules in gray horses, and in one instance are believed
to have induced the condition known as stringhalt.

Fibrous tumors may develop within or from the meningeal structures of
the brain.

Gliomatous tumor is a variety of sarcoma very rarely found in the
structure of the cerebellum.

Treatment for tumors of the