_Symptoms._ There is indisposition to suck or eat, the patient leaves the teat or the food, and looks dull, depressed and disposed to lie down apart. There is evident salivation and on opening the mouth we may find the offensive odor, the tartar covered teeth with red or ulcerated gums, and on the cheeks, lips and tongue dark red patches of congestion, or whitish or yellowish gray, soft, pulpy spots of disintegrating epithelium. This is followed by shedding of these epithelial patches, and the formation of rounded ulcers of a line in diameter or less. These are tender, and bleed readily. They may extend to the skin of the lips, or deeply into the mucosa, the muscles or bones, and the attendant morbid process may cause loosening and evulsion of the teeth. There may be implication of the pharynx, the lymph glands, the nose, the eyes, the stomach, the liver, or the intestines with corresponding symptoms. Death may supervene in from six to thirty days, or a more or less speedy recovery may take place. _Treatment._ The first step as a rule is to remove the tartar from the teeth. This is often done with a wooden spud dipped in a weak solution of hydrochloric acid. A steel scraper will usually act well and without the solvent action of the acid. Next will come the removal of all diseased teeth which are operating as local irritants and as centres for infectious microbes and their hurtful products. Then antiseptics in the form of liquids applied as in the other animals with each meal, will be necessary to counteract infective action, and give the tissues an opportunity to re-establish their integrity. Cadeac recommends a 10 per cent. solution of oil of thyme, as a safe and efficient application. Boric acid, borax, salol, salicylic acid, tannic acid, sulphurous acid, or carbolic acid largely diluted may be substituted. Internally iron tonics and bitters are of great value in improving the tone of the system and securing antisepsis of the intestinal canal. The sulphites too may be given with advantage internally. In depressed conditions alcoholic stimulants may be used both as local antiseptics and general stimulants. As in other animals ulcers may be touched with a rod dipped in tincture of iodine, or a strong solution of chloride of zinc, or nitrate of silver. MERCURIAL STOMATITIS.