If the disease commences as a subacute affection there may have been for a month, capricious appetite, general ill-health and falling away before any other symptom is noticed. Now the breathing is manifestly excited, a small, short cough is heard at intervals, the pulse is accelerated but weak, and pinching auscultation and percussion detect unequivocal signs of pleurisy. From this the symptoms become more decided though for a length of time they are very slight, the animal meanwhile becomes increasingly emaciated, and perishes ultimately in a state of great weakness. Such insidious cases are always to be suspected of tuberculosis. The _post mortem appearances_ resemble those of the horse. The surface of the lung beneath the diseased portions of pleura, however, often presents a marbled appearance from the infiltration of the areolar tissue between the adjacent pulmonary lobules. The organization of the false membranes begins on an average about the tenth day. _Treatment._ The same general principles must be followed as in the horse. Bleeding can rarely be employed, partly because the disease so often assumes a subacute form, and partly because when first seen considerable effusion has often already taken place and severe depletive measures are thereby contraindicated. A laxative dose (1 ℔.) of sulphate magnesia, may be given in warm gruel, and the same means by compresses, hot fomentations and counterirritation adopted, and the same sedative and diuretic medicines given as in the horse. In the advanced stages and in the low types of the disease the stimulating diuretics (sweet spirits of nitre, and liquor of the acetate of ammonia) and vegetable and mineral tonics are especially indicated. The diet in these last types must be nutritive, laxative and easily digested. Tapping of the chest is equally applicable as in the horse, (_see Hydrothorax_.) In the chronic forms everything is to be done to support the general health whether by food stimulants or tonics, and counterirritants may be applied several times. PLEURISY IN SHEEP. Causes, exposure, after clipping, washing in cold weather, alternations from hot buildings to cold fields, shedding of the wool. Symptoms, hyperthermia, troubled breathing and pulse with catching inspiration, tender intercostals, friction sound, and signs of effusion. Treatment, preventive, shelter, febrifuges in food or water, aqua ammonia to sides.