a lusterless yellow, and the depth of the eye
presents more or less of the greenish-yellow shade. The pupil remains a
little contracted, except in advanced and aggravated cases, when, with
opaque lens, it is widely dilated. If, as is common, one eye only has
suffered, the contrast in these respects with the sound eye is all the
more characteristic. Another feature is the erect, attentive carriage of
the ear, to compensate to some extent for the waning vision.

The attacks vary greatly in severity in different cases, but the
recurrence is characteristic, and all alike lead to cataract and
intraocular effusion, with pressure on the retina and abolition of
sight.

_Prevention._--The prevention of this disease is the great object to be
aimed at, and this demands the most careful breeding, feeding, housing,
and general management, as indicated under "Causes." Much can also be
done by migration to a high, dry location, but for this and malarious
affections the improvement of the land by drainage and good cultivation
should be the final aim.

_Treatment_ is not satisfactory, but is largely the same as for common
internal ophthalmia. Some cases, like rheumatism, are benefited by
1-scruple doses of powdered colchicum and 2-dram doses of salicylate of
soda twice a day. In other cases, with marked hardness of the globe of
the eye from intraocular effusion, aseptic puncture of the eye, or even
the excision of a portion of the iris, has helped. During recovery a
course of tonics (2 drams oxid of iron, 10 grains nux vomica, and 1
ounce sulphate of soda daily) is desirable to invigorate the system and
help to ward off another attack. The vulgar resort to knocking out the
wolf teeth and cutting out the haw can only be condemned. The temporary
recovery would take place in one or two weeks, though no such thing had
been done, and the breaking of a small tooth, leaving its fang in the
jaw, only increases the irritation.

CATARACT.

The common result of internal ophthalmia, as of the recurrent type, may
be recognized as described under the first of these diseases. Its
offensive appearance may be obviated by extraction or depression of the
lens, but as the rays of light would no longer be properly refracted,
perfect vision would not be restored, and the animal would be liable to
prove an inveterate shyer. If perfect blindness continued by reason of
pressure on the nerve of sight, no shying would result.

PALSY OF THE NERVE OF SI