er, equal parts, to which add 2 ounces of nitrate of potassium for
each gallon. This should be applied frequently, after the hot water, for
the first day. Afterwards the leg may be dried with a woolen cloth and
bathed with camphorated soap liniment. Internally administer artificial
Carlsbad salts in 2 to 4 ounce doses three times daily. Feed lightly and
give complete rest. This treatment, if instituted early in the attack,
very frequently brings about a remarkable change within 24 hours.

DISEASES OF THE EYE.

BY JAMES LAW, F. R. C. V. S.,

_Formerly Professor of Veterinary Science, etc., Cornell University_.

We can scarcely overestimate the value of sound eyes in the horse, and
hence all diseases and injuries which seriously interfere with vision
are matters of extreme gravity and apprehension, for should they prove
permanent they invariably depreciate the selling price to a considerable
extent. A blind horse is always dangerous in the saddle or in single
harness, and he is scarcely less so when, with partially impaired
vision, he sees things imperfectly, in a distorted form or in a wrong
place, and when he shies or avoids objects which are commonplace or
familiar. When we add to this that certain diseases of the eyes, like
recurring inflammation (moon blindness), are habitually transmitted from
parent to offspring, we can realize still more fully the importance of
these maladies. Again, as a mere matter of beauty, a sound, full, clear,
intelligent eye is something which must always add a high value to our
equine friends and servants.

STRUCTURE OF THE EYE.

(Pl. XXII.)

THE EYEBALL.

A full description of the structure of the eye is incompatible with our
prescribed limits, and yet a short description is absolutely essential
to the clear understanding of what is to follow.

The horse's eye is a spheroidal body, flattened behind, and with its
posterior four-fifths inclosed by an opaque, white, strong fibrous
membrane (the sclerotic), on the inner side of which is laid a more
delicate, friable membrane, consisting mainly of blood vessels and
pigment cells (the choroid), which in its turn is lined by the extremely
delicate and sensitive expansion of the nerve of sight (the retina). The
anterior fifth of the globe of the eye bulges forward from what would
have been the direct line of the sclerotic, and thus forms a segment of
a much smaller sphere than is inclosed by the sclerotic. Its walls, too,
hav