Note 6 — Chapter VII · OF THE CIRCULATION.

Whenever there is any interruption to the ordinary flow of the circulating fluids, the powers of the anastomosing circulation are capable of being increased to a surprising extent. The aorta itself has frequently been tied in animals of considerable size without destroying life; in the human body it has also been found obliterated by disease in different parts of its course, in one case as high as the termination of its curvature. In the cure for aneurism the external iliac artery has been tied by Mr. Abernethy with success; the subclavian artery below the clavicle by Mr. Keate; the common carotid by Sir Astley Cooper; the subclavian artery above the clavicle by Mr. Ramsden; the internal iliac artery by Dr. Stevens; the arteria innominata by Dr. Mott, of New York; and lastly, the abdominal aorta itself, by Sir A. Cooper. Mr. Grainger tied the abdominal aorta of a dog; when the animal had recovered from that operation, the carotids and the great trunks of the anterior extremities were tied: in this manner the whole course of the circulation was altered. The dog, which was of very large size, survived all these operations, and appeared to enjoy its ordinary health. Grainger's General Anatomy, p. 251-253.