As indicating a favorable termination there may be restoration of the rumbling, the passage of fæces at first perhaps in the form of solid cylindroid masses, and later as a mixture of broken up ingesta, liquid and gas, the tension of the abdomen disappears, the pains lessen and cease, and there is a gradual restoration to health. _Lesions._ The abdominal walls are tense and more or less drumlike, and when these are cut through the large intestines protrude strongly. When punctured there is a free discharge of gas. The most common seat of obstruction is the pelvic flexure, but it may occur in the floating colon, or rectum, in the double colon even at other parts than its pelvic flexure, in the cæcum or in the ilio-cæcal opening. The impacted mass is firm, rather dry, covered with mucus and sometimes blood, and manifestly only partially digested. Its size and form vary greatly as it is moulded into the affected viscus. The mucosa in contact with the impacted mass is covered with a thick layer of viscid mucus sometimes streaked with blood. The mucosa itself is congested, thickened, friable, and marked with spots or patches of various colors (white, gray, green,) indicating commencing necrosis. In old standing cases this may extend to the other coats of the bowel determining perforation or laceration. The portion of the bowel immediately in front of the obstruction is filled with liquid which has been forced down upon the barrier by the active peristaltic movements, and the distension by liquid and gas may have increased until rupture has ensued with the escape of the contents into the peritoneal cavity. Invagination, volvulus and peritonitis are common. _Treatment._ This will vary according to the stage and degree of the illness. In slight cases with transient colics only after meals, a more laxative diet may suffice. Boiled flaxseed, roots, potatoes, apples, green cornstalks, silage, or even sloppy bran mashes, with an abundance of good water and active exercise may prove efficient. Copious injections of warm water, soapsuds, or linseed oil emulsion may be added. In the more violent cases we must resort to more active measures and yet drastic purgatives are full of danger. The free secretion from the vascular small intestines and the active vermicular movements, lead to the speedy overdistension of the bowel just in front of the obstruction, the current being strong and active all around the contracting gut in contact with the mucosa, while a weaker return current sets in in the centre, but is effectually checked and arrested at no great distance in front of the impaction by the strong backward peripheral stream. If therefore the impaction is not broken up, it is inevitable that the gut above must be more and more distended until a rupture ensues.