The =papillomata= result from hypertrophy of the normal papillæ, and their general appearance resembles those of the pharynx, gullet and paunch. They sometimes grow to the size of the fist or larger, with a cauliflower appearance, their increase and the formation of pedicles being favored by the active contractions of the muscular coat of the manifolds. They may be red and vascular if recent, are usually white if older, and may become somewhat horny on the surface, but soft and friable within. When they attain a large size they may obstruct the passage to the fourth stomach, tending to impaction of the manifolds and arresting digestion and nutrition. =Sarcoma= of the third stomach has been recorded by Paule, Kitt and Schütz as developing in the subserous tissue and forming a layer on the surface of the organ. This bulges out in rounded swellings of irregular sizes, and may show various degenerations—caseous, calcic or necrotic. The structure shows fusiform and rounded cells more or less numerously imbedded in a fibrous stroma. ACTINOMYCOSIS OF THE ABOMASUM. This has been seen once by Professor Axe. Its true nature is unrecognizable during life, but if other formations of the same kind betray the nature of the lesion, the treatment by iodide of potassium may be resorted to with good hope of success. INDIGESTION OF THE ABOMASUM. Causes: excess of water—ice cold, or after privation. Symptoms: colicy pains, local perspirations, right flank gurgling, diarrhœa, arched back, anorexia, or nervous symptoms. Prevention: Treatment: stimulants, carminatives, exercise, electricity, friction, stimulants of peristalsis. This has been observed as the result of ingestion of an excess of water, and especially ice cold water, by work oxen, or overdriven animals which have been long exposed to the heat of the sun and subjected to violent exertions without drink. The habit of allowing water only at long intervals, though it is being abundantly eliminated not only by kidneys and bowels, but also by the accelerated breathing and the sudation, causes consuming thirst, and when brought to the drinking place, the subject drinks inordinately before eating. Much of this liquid is passed at once into the abomasum, which with a capacity of 20 to 25 quarts, becomes overdistended and irritated. Much of the water passes speedily into the bowels, rousing these also into unwonted action. The sudden distension appears to cause spasmodic contractions of the abomasum, which are aggravated if the liquid is cold, and a violent though transient suffering is induced.