Intolerance of the abomasum for food already ingested and ruminated may extend to the omasum. Peristalsis of the rumen then ceases, and slight tympanites occurs. The most characteristic condition is the existence of obstinate constipation. If ulceration takes place without producing any important vascular lesion, which, however, is rare, the fæces are hard and coated, but without other peculiarity; if, however (and this appears to be the rule), local hæmorrhage occurs, the extravasated blood is modified by the gastric and intestinal juices, and the fæces appear of a black, tarry colour. This coloration is very significant, and differs from that produced by the bile. It occurs only in gastric hæmorrhage, and at intervals. =Diagnosis.= The diagnosis of gastric ulcer is difficult, and can only be arrived at with confidence when the above-mentioned coloration of the fæces can be detected. =Prognosis.= From an economic standpoint the prognosis is grave. The patient may recover; the ulcers may heal, but cicatrisation is always prolonged, and as, on the other hand, the glandular apparatus of the abomasum is generally more or less injured, complete recovery is impossible. [Illustration: $1] =Treatment= should be directed towards checking hæmorrhage, diminishing intolerance to food, and assisting the healing of the lesions. These objects are facilitated by prolonged complete rest in the stable, by injecting ergotine, or, ·7 per cent. saline solution, at the time when the hæmorrhage occurs, and, if possible, by placing the animals on milk diet or on emollient food, like gruels, emollient infusions, barley, milk, cooked roots, etc. Stimulation over the region of the abomasum is also of value. At a later stage, when the acute symptoms have diminished, Carlsbad salts, in doses of 1 to 2 ounces per day, can be given. Bicarbonate of soda is also of considerable value. CHRONIC TYMPANITES. Chronic Indigestion—Obstruction of the Abomasum—Chronic Gastritis—Dyspepsia. Among pathological conditions of the stomach in ruminants a certain number are clinically marked by one constant symptom, viz., chronic tympanites, a fact which was formerly recognised as indicative of chronic indigestion.