to such a degree as to resemble an artery. A diffused
swelling, with great tenderness, may extend along the affected vessel
and the animal manifest all the symptoms connected with acute fever and
general functional disturbance.

_Pathology._--The disease is only serious when large veins are affected.
The coats undergo the same changes as in arteritis; clots of blood and
lymph plug the inflamed vessel, and, if the inflammatory process
continues, these are converted into pus, which ruptures the vessel and
produces a deep abscess; or it may be carried away in the circulation
and produce metastatic abscess in the lungs or other remote organs. In
mild cases the clots may become absorbed and the vessel restored to
health. Phlebitis in the course of the veins of the limbs frequently
leads to numerous abscesses, which may be mistaken for farcy
ulcerations. A very common result of phlebitis is an obliteration of the
affected portion of the vein, but as collateral circulation is readily
established this is seldom of any material inconvenience.

_Treatment._--Phlebitis should be treated by the application of a smart
blister along the course of the inflamed vessel; early opening of any
abscesses which may form; the animal should have complete rest, and the
bowels be kept loose with bran mashes. When the fever runs high,
half-ounce doses of nitrate of potassium may be given in the drinking
water, which may be changed in two or three days for 1-dram doses of the
iodid of potassium. If the animal becomes debilitated, carbonate of
ammonia, 1 dram, and powdered gentian, 3 drams, may be given every six
hours.

VARICOSE VEINS, VARIX, OR DILATATION OF VEINS.

This may be a result of weakening of the coats from inflammatory disease
and degeneration. It may also be due to mechanical obstruction from
internal or external sources. It is sometimes found in the vein which
lies superficial over the inside of the hock joint, and may be due to
the pressure of a spavin. Occasionally it may be observed in stallions,
which are more or less subject to varicocele, or dilatation of the veins
of the testicular cord. Hemorrhoidal veins, or piles, are occasionally
met with, generally in horses which run at pasture. Varicose veins may
ulcerate and form an abscess in the surrounding tissues, or they may
rupture from internal blood pressure and the blood form large tumors
where the tissues are soft.

_Treatment._--Stallions which manifest a tendency to