After four years of additional study Kylin offers a thoroughly revised and enlarged edition on hypertension adapted as a text for physicians. Dealing as it does with a subject so basically controversial and in connection with which there is such a paucity of complete data, the book is refreshingly free from metaphoric aphorisms, rehash and startling therapeusis. The bibliographic background, as well as his own research, is wide and authoritative.
Kylin first investigates the normal values of the arterial and capillary pressure. On consideration of an extensive critique of the clinical methods and statistics, he establishes the normal systolic arterial pressure as from 100 to 145 mm. of mercury under 40 years of age, and from 145 to 150 mm. over that age. Daily fluctuations are not in excess of 15 mm. The normal capillary pressure is from 80 to 200 mm. of water, with daily variations not exceeding 40