This investigator has thoroughly studied the principles and significance of blood pressure measurement. He has particularly gone into the study of oscillometry, expounding the various phases of a blood pressure curve. For the more accurate study of blood pressure phases and the contour of the impulses in these phases von Recklinghausen presents a new instrument, the gryptonograph. This apparatus appears compact and practical for office use. Many case reports are appended to present the clinical value of the instrument and the methods employed. In addition, studies are presented comparing phases of simultaneous pressure in the four extremities and variations under physiologic and pathologic conditions. This book should serve as an excellent introduction to the subject. The printing and illustrations are good. The references include the most important contributions to date.