'Treatment'.--This species of ophthalmia is best subdued by the application of emollient poultices, depletion, purgation and cooling washes. If a seed, small briar, or other substance has got in under the lids, or inserted itself in the globe of the eye, the dog keeps the eye closed, it waters freely, and in a short time becomes red and inflamed. The removal of the article alone, will generally produce a cure; sometimes it is necessary to use a cooling wash and administer a purge or two. Great care should he had for the extraction of extraneous substances from the eyes of dogs, as their presence often causes great suffering to the animal even while diligently employed in the field. The writer has seen dogs more than once rendered useless while hunting, by grass, cloverseeds, or other small particles burying themselves under the lids. 'Ophthalmia of Distemper'.--This species of inflammation will be spoken of when treating of this latter affection. SYMPATHETIC OPHTHALMIA arises from the presence of some other disease located in another portion of the body, as derangement of the stomach, mange, surfeit, &c. The presence of one of these affections will indicate the cause of the other. 'Treatment'.--Soothing applications to the organ itself, and remedies for the removal of the primary affection. HYDROPHTHALMIA though not a common affection in the canine race, is occasionally met with; several cases have come under the observation of the writer, and no doubt there are but few dog-fanciers who have not seen the eyeballs of some dog suffering with this malady, ready to start from their sockets. This affection depends upon a superabundance of the humours of the eye, occasioned by over-secretion, or a want of power in the absorbent vessels to carry off the natural secretions of the parts. Old dogs are more apt to suffer from this disease than young dogs: nevertheless, the latter are not by any means exempt; we once saw a pup, a few days old, with the globe of the eye greatly extended by this affection. As the disease progresses, the eye becomes more hard and tender, the sight is greatly impaired, and ultimately, if not arrested, the eye bursts, discharges its contents, and total blindness ensues, greatly to the relief of the poor animal. 'Treatment'.--This disease is very intractable, and is to be combated by saline purges, bleeding, and stimulating application to the organ itself. Mercurial ointment, rubbed over the eyebrow, will assist in stimulating the absorbents. When the disease has progressed for a long time, and the pain, as is often the case, seems intense, it will save the animal great suffering, by opening the ball and allowing the humours to escape. This may be done by puncturing the cornea or the sclerotic coat with a needle. Setons introduced along the spine would have a good effect. CONGENITAL BLINDNESS