ould be firmly secured; an
assistant should part the lids; if necessary, the haw must be secured
within the corner of the eye and then all parts of the ulcer should be
lightly touched with the silver. After waiting a few minutes the eye should
be thoroughly washed out with a very weak solution of common salt. This
operation generally has to be repeated at the end of three or four days. If
healthy action succeeds, the ulcer assumes a delicate fleshy tint, and the
former redness around the ulcer disappears in proportion as the ulcer
heals.

In superficial abrasions of the cornea, where there is no distinct
excavation, this caustic treatment is not needed. The eye should be bathed
several times a day with sulphate of zinc, 30 grains to half a pint of soft
water, and protected against exposure to cold air and sunlight. Excessive
ulceration sometimes assumes the form of fungous excrescence upon the
cornea, appearing to derive its nourishment from loops of blood vessels of
the conjunctiva. Under these circumstances the fungoid mass must be cut
away and the wound cauterized with the nitrate of silver, or else the eye
will soon be destroyed. When ulcers of the cornea appear indolent, with a
tendency to slough, in addition to the treatment already prescribed, tonic
powders of copperas, gentian, and ginger, equal parts by weight, should be
given twice a day, mixed with the feed; dose, one tablespoonful.

STAPHYLOMA.

This is a disease of the eyeball, in which the cornea loses its
transparency, rises above the level of the eye, and even projects beyond
the eyelids in the form of an elongated, whitish, or pearl-colored tumor,
which is sometimes smooth, at other times uneven.

_Causes._--Inflammation is the only known cause, although it may not occur
immediately; it frequently follows catarrhal conjunctivitis and keratitis
as a sequela.

_Treatment._--In a few cases restoration of sight may be effected by
puncturing the projecting tumor and treating it afterwards with nitrate of
silver in the same manner as prescribed for ulceration of the cornea. In
some cases spontaneous rupture has occurred, and healing without any
treatment at all.

CATARACT.

In cataract the crystalline lens becomes opaque and loses its transparency,
the power of refraction is lost--the animal can not see.

_Causes._--Cataract generally arises from a diminution (atrophy) or other
change in the nutrition of the lens; it may occur as a result of
inf