_Symptoms._ In fully developed cases the abdomen is greatly distended and tympanitic. The drumlike resonance is met with in the anterior part of the abdomen including the umbilical region. It extends forward over one-half of the thorax, excepting only a space of 5 or 6 inches square in the right hypochondrium, which represents the situation of the liver, and spleen. Auscultation furnishes no sound in the abdomen, and only in the anterior portion of the thorax is there a distinct respiratory murmur. The heart may beat strongly and rapidly, or weakly and slow, and the pulse is small and thready. The abdomen is tender. The animal stands, dull, and breathes with great effort. If made to walk it is done slowly, stiffly and with head extended, mouth open and tongue protruding. There is no sign of vomiting and this cannot be brought about by tickling the fauces, or even by giving apomorphine subcutem, though retching may be induced. _Course._ The disease may develop into dullness and anorexia in two hours after boisterous health; in twelve hours there may be considerable tympany and dyspnœa; and a fatal result is reached in about thirty-six hours. _Diagnosis._ This is based on the transition from vigorous health to sudden illness, with complete anorexia, inability to swallow or to vomit, tympany of the stomach as shown by percussion, tenderness of the abdomen, dyspnœa, disturbed heart-functions, and inactivity of the bowels. With intestinal obstruction on the other hand there is free vomiting of bilious and feculent matters. With peritonitis there is much greater and more uniform abdominal tenderness, vomiting and higher fever, but less tympany in the anterior abdominal region, and no such complete suspension of defecation. With choking there is no such progressive tympany, appetite and defecation are not so completely suspended, and liquids may often pass the obstruction in small quantities in both deglutition and vomiting. Choking is by no means so speedily fatal. _Treatment_ is essentially surgical. When tympany is already established the gas must be evacuated by a small cannula and trochar. Then resort is had to laparotomy, the incision is made on the right side large enough to introduce the fingers, which must follow the great curvature of the stomach as far as the pylorus which is pulled back into its normal position on the right. The incision is now closed by an ordinary continuous suture. FOREIGN BODIES IN THE STOMACH. HAIR, WOOL, BRISTLE, CLOVER AND COTTON BALLS. Hair balls, wool balls, bristle balls, cotton balls, clover-hair balls, oat-hair balls, paper balls, phosphatic calculi, sand and gravel, nails, wires, needles, pins, etc., cloth, leather, whalebone, playthings, etc. Symptoms: of catarrh or colic, dullness, restlessness, arched back, in dog vomiting of blood, fistula. Diagnosis. Treatment: emetic, feed potatoes, laparotomy.