=Treatment.= In cases of gastritis or acute gastro-duodenitis moderate bleeding (three to four quarts) and local stimulation were formerly recommended. This practice certainly has its advantages, provided it is not pushed to excess. Sinapisms give good results, but as they must be left in position for a considerable time, it is often better to apply vesicants over the lower right hypochondriac region. At first purgatives are useful, because they unload the digestive tract, arrest the organic fermentation which results from stagnation in the movement of food along the alimentary tract, and diminish the tendency to intoxications or infections. At a later stage small doses of laxatives and bicarbonate of soda should be given daily, the diet being of an emollient character, and consisting of milk, starchy or farinaceous foods, and small quantities of good hay. Linseed, bran, cooked grain, decoctions of pellitory, barley and various cereals may also be administered with advantage. CATARRHAL GASTRITIS IN SWINE. =Definition.= Inflammation of the gastric mucosa, with muco-purulent discharge. =The causes= comprise irritants, fermented or putrid swill, decomposed food, excess of brine, alkalies (washings from table dishes, hotels, etc.), gastric parasites. The condition occurs also in hog cholera, swine plague, rouget, etc. The chief =symptoms= are: Inappetence, vomiting, uneasiness, colic, constipation or diarrhœa, fever, stiffness, tense and tender abdomen, arched back, frequent grunting, limpness of the tail. Sudden vomiting may bring about a rapid recovery. =Treatment= calls for a complete change of food, which may include freshly cooked roots, linseed or meal, butter milk, boiled milk, etc. As an emetic 30 grains of ipecacuanha may be given. Constipation can be relieved by a dose of calomel or jalap. If diarrhœa is persistent small doses of grey powder should be given, and to combat the irritation of the gastric mucous membrane bismuth subnitrate is also useful. The piggery should be cleansed and disinfected, and the litter frequently changed. ULCERATIVE GASTRITIS. Ulcerative gastritis (ulcer of the abomasum) is recognised after death, but hitherto it has been impossible to so clearly identify the symptoms as to permit of diagnosis during the animal’s life. It has been found after death in adults and in calves (Ostertag). =Causation and Pathogeny.= The cause of gastric ulceration is decidedly obscure, though we know that certain forms occur during infectious diseases like cattle plague, foot-and-mouth disease, gangrenous coryza, and as a consequence of certain direct local infections; other forms result from the administration of drugs; and finally some are of secretory origin.