_Symptoms._ These usually develop six or more hours after a feed. The earlier symptoms are those of digestive disorder. There is colic, nausea, retching, vomiting of septic or bilious matter, ardent thirst, dry mouth, furred tongue, redness of the buccal mucosa, and tenderness of the abdomen. Diarrhœa sets in early and may become bloody, fœtid and dysenteric. There is usually much prostration and debility so that apart from his compulsory movements under the colics the animal remains most of the time curled up. Fever is usually slight but the temperature may rise to 105° F. Death may take place in 3 hours, or may be deferred 24 hours or longer. _Lesions._ There is usually gastro-enteritis, the mucosa being congested, red œdematous, with petechiæ, and congestion and swelling of Peyer’s patches, the solitary glands, the mesenteric glands, the liver and kidneys. The contents of the bowel are brownish red, and an effusion into the peritoneum is common. The spleen is often engorged and enlarged. Congestions of the lungs and brain are common. _Treatment._ Evacuate the stomach by ipecacuan, etc., and the bowels by a purgative. Next seek elimination of the toxins by potassium iodide and other diuretics. Antiseptics (calomel, salol, naphthalin) to counteract the further formation of toxins, and demulcents by draught and enema are indicated. In cases of great prostration, heart and nerve stimulants may be useful. DIARRHŒA, SCOURING. Definition. Concomitant of other affections. Causes: Congestion, effusion from small and large intestine, irritants in bowels, or blood, chill or other shock acting as reflex, cold drink and violent exercise, aqueous food, cooked, pulped; irritants, feculent concretions, parasites, fermentation products, diseased teeth, jaws or salivary glands, drink after grain, gastric hepatic or pancreatic disease, spoiled food, purgative agents in food, fever products, purgative waters, rains, dews, damp stalls, etc., fear, “washy” horses, nervous animals, root diet, œstrum, hepatic torpor, equine susceptibility. Symptoms: with root diet, with much or little bile, slight cases do not affect system, in severe cases, tympany, pawing, straining, fœtor, in infective diseases; complications, laminitis, enteritis, pneumonia. Treatment: remove or expel cause, demulcents, laxatives, anodynes, antiseptics; chronic cases, iron, bitters, antiseptics, astringents, dietetics, rest. _Definition._ A frequent discharge of fluid or semi-fluid evacuations from the bowels without excessive griping or painful straining. This is a common condition attending many diseases, rather than a specific disease of itself yet it is such a prominent feature of these various affections, and one so very characteristic that it seems well to give it a special place, even at the risk of repeating much of what must necessarily appear elsewhere.