The arteries are, as a general rule, quite free from disease, but not wholly so. The principal affections are, aneurism and calcification. Inflammation of the arteries is a very rare disease, occurring chiefly in very old age; but sometimes in syphilitic and other affections, a peculiar kind of inflammation of the coating of the arteries occurs. It is followed by a chalky deposit, which is known as calcification of the artery. We have met several cases in which this process had extended to such a marked degree that the hardened arteries could be felt in various parts of the body, giving to the fingers the sensation of a pipestem broken in various fragments. Aneurism of the arteries is a disease which frequently arises from this same kind of inflammation. It is further described in the section devoted to surgery.