_Lesions._ In case of death there are the usual lesions of gaseous indigestion, with or without enteritis, but with the accumulation of a great quantity of liquid contents, above the ball, which is felt as a firm body impacted in the gut. In other cases the distended bowel has given way and the liquid contents and often the hair ball as well are found free in the abdominal cavity. In such a case the edges of the laceration are covered with blood clots and thickened with inflammatory exudation, and there is more or less peritonitis. _Treatment._ Relief may sometimes be obtained by the extraction of a hair ball lodged in the rectum or adjacent part of the floating colon. In other cases abundant soapy or oily enemata, and the employment of eserine or barium chloride subcutem are indicated. HAIR AND BRISTLE BALLS IN DOG AND PIG. From licking in skin disease. Symptoms: of obstruction. Treatment: manipulation, enemata, oil, antispasmodics, eserine, barium chloride, laparotomy, diet in convalescence. The hair balls of _dogs_ come mainly from licking themselves when affected with skin diseases or parasites. In _pigs_ they are mostly attributed to depraved appetite. The hair balls of the _dog_ are small, open in texture, and easily disintegrated, having little mucus and no earthy salts in their composition. The bristle balls of _pigs_ take the form of straight or curved rods of firm consistency, but without earthy salts. The projecting ends of the bristles render them particularly irritating. The _symptoms_ are those of obstruction of the bowels, and the _treatment_ consists in efforts to dislodge them. If situated near the anus they may sometimes be reached with the finger, or copious oily injections may facilitate their passage. Manipulations through the abdominal walls may be helpful in the dog. Oleaginous laxatives and antispasmodics may be tried, or these failing, eserine or barium chloride. As a last resort laparotomy may be performed, the ball abstracted and the intestine and abdominal wall carefully sutured (Siedamgrotzky). In such a case the diet should be restricted for a week to beef soups, buttermilk, and well boiled gruels, especially flaxseed. INTESTINAL CALCULI. ENTEROLITHS. BEZOARS.