of the cord glioma or the mixed gliosarcomata are
found to be the most frequent, tumors may form from the meninges and the
vertebrae, being of a fibrous or bony nature, and affect the spinal cord
indirectly by compression. In the meninges we may find glioma, cancers,
and psammoma, fibromata; aneurisms of the spinal arteries have been
discovered in the spinal canal.

_Symptoms._--Tumors of the spinal canal cause symptoms of spinal
irritation or compression of the cord. The gradual and slow development
of symptoms of paralysis of one or both hind limbs or certain muscles
may lead to a suspicion of spinal tumors. The paralysis induced is
progressive, but not usually marked with atrophy of the muscles or
increased sensibility along the spine. When the tumor is within the
spinal cord itself all the symptoms of myelitis may be present.

_Treatment._--General tonics and 1-dram doses of nux vomica may be
given; iodid of iron or iodid of potassium in 1-dram doses, three times
a day in feed, may, in a very few cases, give some temporary benefit.
Usually the disease progresses steadily until it proves fatal.

NEURITIS, OR INFLAMMATION OF A NERVE.

This is caused by a bruise or wound of a nerve or by strangulation in a
ligature when the nerve is included in the ligation of an artery. The
changes in an inflamed nerve are an enlargement, reddening of the nerve
sheath, spots of extravasated blood, and sometimes an infiltration of
serum mixed with pus.

_Symptoms._--Acute pain of the parts supplied by the nerve and absence
of swelling or increased heat of the part.

_Treatment._--Hypodermic injections of from 3 to 5 grains of morphia to
relieve pain, hot fomentations, and rest. If it is due to an inclusion
of a ligature, the nerve should be divided above and below the ligature.

NEUROMA, OR TUMOR OF A NERVE.

Neuroma may be from enlargement of the end of a divided nerve or due to
fibrous degeneration of a nerve which has been bruised or wounded. Its
most frequent occurrence is found after the operation of neurotomy for
foot lameness, and it may appear after the lapse of months or even
years. Neuroma usually develops within the sheath of the nerve with or
without implicating the nerve fibers. It is oval, running lengthwise
with the direction of the nerve.

_Symptoms._--Pain of the affected limb or part is manifested, more
especially after resting a while, and when pressure is made upon the
tumor it causes extreme sufferin