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This beautifully illustrated book gives an account of the vascular patterns found by complete capillary injection of the human brain. Many problems in cerebral circulation that have long been under discussion receive an apparently final answer. The arteries of the brain show a form perhaps to be ascribed to the effect of hydrodynamic forces. As a result of giving off branches under high pressure, the larger vessels pursue a slightly zig-zag or corkscrew course. Branches are given off usually at almost right angles to the main stream, finally ending in terminal arborizations with widely spread limbs. There is a slight conical enlargement at the base of each branch, and the main trunk is slightly narrowed beyond. The old conception of cortical arteries and medullary arteries distinct from one another is incorrect; the vessels running in from the pia supply both gray and white matter. There is a rich anastomosis throughout