If the _stomach should become ruptured_ there is often vomiting, the ingesta escaping by the nose, without any relief of the general symptoms, but with an increasingly haggard expression of countenance, sunken eye, and accelerated, weak, and finally imperceptible pulse. Cold sweats, which may have been already present, become more marked and the prostration becomes more extreme and the abdominal tenderness more marked. There are muscular tremblings of the shoulders and thighs, dilatation of the pupils, rapid breathing and stupor which presages death. Recovery may be hoped for if rumbling in the bowels commences anew, if defecations continue and become soft and liquid, if urine is passed abundantly and if the general symptoms are improved. Complete relief may be had in five or six hours, and even in protracted cases in two days. _Lesions._ The body is swollen, tense and resonant; the rectum usually projects somewhat and is dark red; the intestines, small and large, are tympanitic; the stomach is double or triple its usual size, tense and resistant, and with its contents may weigh as much as 40 pounds. When cut open its contents are seen to be disposed in the order in which they were eaten, in stratified layers, the motions of the stomach have not operated to mix them. There is no sign of digestion, unless it be in a thin surface layer or film which may be white, pulpy and chymified. The cuticular mucosa is usually unchanged further than its attenuation by stretching, the alveolated mucosa also attenuated is congested, opaque or slightly inflamed. The great curvature may be the seat of a rupture the edges of which are slightly swollen, congested and covered with small blood clots. The escaping ingesta usually remains enclosed in the omentum, which thus looks like a larger stomach with extremely thin gauze-like walls. If this is ruptured then the food floats in masses among the convolutions of the intestines. The peritoneum is red, hemorrhagic and covered with more or less exudation. Another occasional lesion is rupture of the diaphragm. The liver and spleen are usually small and comparatively bloodless, owing to the compression. _Diagnosis._ This is largely based on the speedy supervention of the attack on a feed, the animal having been apparently well before, on the onset by slight colics, rapidly passing into great and continuous suffering and stupor, with tympanitic tension of the abdomen, and suppression of the intestinal movements, in the absence of any distinct or marked hyperthermia. The rapid progress to death or recovery is equally characteristic.