_Symptoms._ These appear suddenly after the drinking of the cold water and consist in the most violent colicy pains, twisting of the tail, kicking at the belly, lying down and rising at short intervals, moaning, looking at the flanks, anxious countenance, and the breaking out of perspirations around the ears, on the neck or belly. There is no tympany of the rumen but there are some fullness and active gurgling on the right side of the abdomen. The attack does not usually exceed one or two hours in length, and a profuse diarrhœa brings relief, the alvine discharges being very watery with considerable mucus and some undigested food principles. In exceptional cases it has lasted for six hours and even in the more transient cases, there is liable to remain for a time dullness and prostration, advancing of the hind legs under the body, anorexia and suspended rumination. Cruzel records two cases in which the small intestine was ruptured as the result of too vigorous driving of the patients. Other cases have perished from the coexistent diarrhœa. Nervous symptoms also may appear as in other gastric disorders. The usual result is recovery after a very transient illness. This short and favorable course, and the evidence of cause and symptoms sufficiently identify the disease. _Treatment._ Prevention should be sought by avoidance of cold water in excess, when the animal is heated, fatigued and thirsty. A little food, an occasional mouthful of water, or a drink of warm water and meal will act prophylactically. When the animal is attacked alcoholic drinks, ammonia, carminatives (pepper, ginger, fennel, caraway, peppermint, chamomile) or even strong tea or coffee may be used to advantage. Careful walking exercise is also useful with friction to the abdomen, or the use of electricity. Cadeac advises stimulants of the peristalsis—eserine, veratrine or pilocarpin subcutem; senna, podophyllin, or castor oil by the mouth. INDIGESTION OF THE FOURTH STOMACH IN THE YOUNG. Causes: Symptoms: Dullness, recumbency, inappetence, colic, acid eructations, abdominal tension, costiveness, diarrhœa, emaciation. Lesions: Sour coagula in stomach, puffy or congested mucosa, undigested casein in bowels and fæces. Prevention as in infector gastro-enteritis. Treatment: Elimination, antacid, antiseptic, carminative, stimulant, rennet. While the fourth stomach in the mature animal is protected against danger by the preparatory work of the first three, and by their action in retarding the food in its progress, and allowing it to pass into the fourth only when thoroughly comminuted and then only in small quantity at a time; in the suckling on the other hand the milk passes at once into the abomasum, which is thus rendered as susceptible as in the monogastric animal.