As the disease progresses, the conjunctiva becomes more vascular, the photophobia intolerable, the cornea itself becomes opaque, and sometimes exhibits a vascular appearance. There is considerable itching of the ball, as evinced by the disposition of the dog to close the eye. If the disease progresses in its course, unchecked by any remediate means, the cornea may lose its vitality, ulceration commence, and the sight be for ever destroyed by the bursting and discharge of the contents of the eye. 'Causes.'--Simple canine opthalmia proceeds from many causes, distinct in their character, but all requiring pretty much the same treatment. Bad feeding, bad lodging, want of exercise, extremes of heat, and cold, are the most active agents in producing this affection. 'Treatment.'--The disease in its mild form is very tractable, and requires but little attention; soothing applications, in connexion with confinement to an obscure apartment and low diet, will generally correct the affection in its forming stage. In all inflammations of the eye, tepid applications we consider preferable to cold, the latter producing a temporary reaction, but no permanent good, while the former exerts a soothing and relaxing influence over the tissues and parts to which they are applied. Weak vinegar and water, with a small proportion of laudanum, we have frequently seen used with advantage as a wash in this complaint. When there is fever, it will be necessary to bleed, and purge. Scarifying the conjunctiva with the point of a lancet, has been resorted to by some veterinary surgeons with success. CHRONIC OPHTHALMIA. When the disease assumes this form, the discharge from the eyes is lessened, and becomes more thick, the conjunctiva is not of such a bright arterial red, but more of a brick-dust colour, and the inner side of the lids when exposed will present small prominences and ulcerations. 'Treatment.'--More stimulating collyria will now be necessary, as solutions of sulphate of zinc, copper, acetate of lead, &c. See No. 1, 2, 3, of the Collyria. The direct application of sulphate of copper, or nitrate of silver, will often be of great benefit in changing the action of the parts. The lids should be turned down and brushed over two or three times with the above articles in substance, and the dog restrained for a few moments to prevent him from scratching during the temporary pain inflicted upon him by the application. Laudanum dropped in the eye will also prove very beneficial, allaying the itching and pain, at the same time stimulating the organs to renewed action. If the disease does not succumb under this treatment, a seton placed in the pole will generally conquer it. TRAUMATIC OPHTHALMIA is produced by wounds of poisoned briars, stings of insects, bites of other dogs, the scratching of cats, or the actual presence of foreign bodies in the eye itself, which latter cause frequently occurs, and is often overlooked by the sportsman.