184 DISEASES OF THE HORSE. 
one ounce; linseed meal, two ounces; mix and divide 
into twenty powders. Bathe the eye with the follow- 
ing: Belladonna, one ounce ; rain-water, one pint: or, 
nitrate of silver, eight grains; distilled water, four 
ounces; mix: or, sulphate of zinc, one half drachm ; 
diacetate of lead, one drachm; water, one and a half 
pints: or, take a piece of sulphate of copper, (blue- 
stone,) shave it thin and smooth, and pass it carefully 
between the eyelid and the eyeball twice a day until 
the eye is cleared up. 
CATARACT. 
This disease is usually the result of termination of 
specific ophthalmia, causing an opacity or breaking up of 
the crystalline lens, situated directly behind the pupil, 
presenting a white and cloudy appearance in the centre 
of the eye, and causing partial or total blindness. Little 
can be done by way of treatment in this disease as it 
occurs in the horse. 
