_Treatment._ Though the presence of the grub constitutes no disease, some think it well to diminish their number by all convenient means. One simple way of effecting this is, by turning up with a plough a furrow of earth in the sheep-pasture, into which the sheep will thrust their noses on the approach of the _[oe]strus_, and thus many of them escape its attacks. Some farmers smear the noses of their sheep occasionally With tar, the odor of which is believed to repel the fly. Another plan, deemed efficacious in dislodging the larvæ from the sinuses, is as follows: Take half a pound of good Scotch snuff, and two quarts of boiling water; stir, and let it stand till cold. Inject about a table-spoonful of this liquid and sediment up each nostril, with a syringe; repeat this three or four times, at intervals, from the middle of October till January. The efficacy of the snuff will be increased by adding half an ounce of asaf[oe]tida, pounded in a little water. The effects on the sheep are immediate prostration and apparent death; but they will soon recover. A decoction of tobacco affords a substitute for snuff; and some recommend blowing tobacco smoke through the tail of a pipe into each nostril. HOOF-AIL. The first symptom of this troublesome malady, known, likewise, as foot-ail, which is ordinarily noticed, is a lameness of one or both of the fore-feet. On daily examining, however, the feet of a flock which have the disease among them, it will readily be seen that the lesions manifest themselves for several days before they are followed with lameness. The horny covering of the sheep's foot extends up, gradually thinning out, some way between the toes and divisions of the hoof, and above these horny walls the cleft is lined with skin. When the points of the toes are spread apart, this skin is shown in front, covered with short, soft hair. The back part of the toes, or the heels, can be separated only to a little distance, and the skin in the cleft above them is naked. In a healthy foot, the skin throughout the whole cleft is as firm, dry, and uneroded as on any other part of the animal. The first symptom of hoof-ail is a slight erosion, accompanied with inflammation and heat of the naked skin in the _back parts_ of the clefts, immediately above the heels. The skin assumes a macerated appearance, and is kept moist by the presence of a sanious discharge from the ulcerated surface. As the inflammation extends, the friction of the parts causes pain, and the sheep limps. At this stage, the foot, _externally_, in a great majority of cases, exhibits not the least trace of disease, with the exception of a slight redness, and sometimes the appearance of a small sore at the upper edge of the cleft, when viewed from behind.