As far as the stomach is concerned, an effective relief can be had through the probang or stomach pump. A small one-half inch hollow probang may be safely passed through the nose and gullet into the stomach, and any gas or liquid allowed to escape. With proper attachments this may be fixed to a stomach pump and the viscus exhausted of all available liquid, after which an equal amount is pumped in and again withdrawn, until the contents are reduced to a normal amount. The water pumped in may be rendered antiseptic by sodium chloride, sodium bisulphite, or other antiferment, so that further extrication of gas will be prevented. If it is necessary to use the ordinary probang or stomach tube introduced through the mouth, great care must be taken in introducing it to see that the soft palate does not deflect it downward into the larynx. Its presence in the gullet above and beyond the larynx can be felt by manipulation from without, and until this is ascertained it should on no account be pushed onward. The importance of a measure of mechanical relief such as this, is the greater that the stomach of the soliped is non-absorbing, and relief from undue pressure of contents can only be had by their passage upward or downward. Then again, the horse cannot vomit like the carnivora and omnivora, nor regurgitate like ruminants, and if left to himself with engorged stomach, his case is hopeless indeed. The contingent weakness in cases of recovery may demand careful feeding and a course of bitter tonics. GASTRIC INDIGESTION IN CARNIVORA. Causes: too frequent feeding, indigestible food, epidermic products, bones, tendons, rubber, cords, marbles, pebbles, catarrh, inflammation, intestinal lesions, fever. Symptoms: dullness, restlessness, eating grass, vomiting, seeks seclusion, colics, giddiness, tense, tender abdomen. Treatment: emetic, diluents, dieting, tonics. _Causes._ Unintermittent work of the organ wears out its tone and indigestion follows. The more indigestible the food, and the admixture with the food of indigestible materials the greater the tendency to this fatigue and atony. Thus epidermic materials, hair, horn, wool, bristles, feathers are often injurious; also bones, tendons, and above all pieces of rubber, caouchouc, cords, marbles, pebbles and other small objects. Fortunately such agents are usually rejected by vomiting, but if retained, the movements of the viscus become tardy and its secretions defective, and fermentation, indigestion and irritation ensue. The evil effects however mostly come of catarrhal and other inflammations of the stomach, and serious lesions of the intestines, (inflammation, obstruction, volvulus, intussusception, tumors, strangulated hernia,) or acute fever. In any such case the stomach ceases to act, and its contents become a center of active fermentation with more or less irritation.