To distinguish between the different kinds of cataract, apply the belladonna. Next place the horse near a window or under a door. Should the sun shine, have the animal led into the full glare of day. Look steadily into the eye from different points of view. Then have the horse's head moved about, all the time keeping your sight fixed upon the part you are desirous of inspecting. Should one spot continue in every position, of one bulk, and of one aspect, never becoming very narrow and always occupying one place throughout the examination,--it is a lenticular cataract that is beheld. [Illustration: DIAGRAM ILLUSTRATING THE DIFFERENT KINDS OF CATARACT. 1. A capsular cataract or an opacity, situated on the envelope of the lens. 2. A lenticular cataract or an opacity, within the substance of the lens. 3. A spurious cataract, or a particle of lymph adhering to the inner surface of the lenticular capsule. ] If the whiteness changes appearances, in some positions seeming very thin or perceptibly less bulky, it is assuredly a capsular cataract which is inspected. Most cataracts may either be partial or complete; but a spurious cataract is always partial, never permanent, and invariably caused by violence. For spurious cataract, treat the injury to the exterior of the eye. For other cataracts, do nothing: there is no known medicine of any beneficial effect. However, it is well to add, the author's and the general opinion favors the absorption of cataract; or that these opacities may appear and after a time go away without the aid of medicine. Nevertheless, to hasten such a process, have the interior of the stable colored. However much in favor a clean white wall may be with grooms or with the lower order, exercise an informed judgment; have the wall shaded of the tint most pleasant to the inhabitants' sight, and the prospect of recovery will by so trivial an outlay be materially facilitated. FUNGOID TUMORS WITHIN THE SUBSTANCE OF THE EYE. These, fortunately, are rare affections. We know of no immediate cause for their production. No man can prophesy their appearance. The horse, to human judgment, may enjoy the top of health; may be in flesh and full of spirit--altogether blooming. Nevertheless, the action of the legs may perceptibly grow higher, and the ears become more active. The animal will wait to be urged or guided, when the road is clear. Also, it may run into obstacles, when the rider does not touch the rein. Should anything be left in the gangway of the stable, it is certain to be upset, by what the groom terms "that clumsy horse." Sometimes it will stand for hours together neglecting its food, with the head held piteously on one side. Occasionally, when at grass, it may be found separated from its companions, alone and dejected, with the head as before, held on one side, while the waters of the eye copiously bedew the cheek. [Illustration: