BLOOD PRESSURE OF NORMAL GIRLS FROM THREE TO SIXTEEN YEARS OF AGE

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Abstract
THE PRESENT study of blood pressure was begun at the Child Research Council in Denver. Much of the literature was covered at that time and initial experiments concerning blood pressure were carried out. The data for the study have been gathered from girls at the University of Chicago Laboratory School. REVIEW OF LITERATURE The first to measure blood pressure was Stephen Hales, in England, who in 1733 attached a glass tube 12 feet and 9 inches (389 cm.) long to the left carotid artery of a horse, held the tube vertically and found the blood to rise to a height of 9 feet and 6 inches (290 cm.).1 Poiseuille introduced the U form of mercury manometer in 1828.2 Von Basch3 was the first to perfect a sphygmomanometer for clinical use. His had a glass cylinder containing a rubber bulb connected with a mercury manometer, later with a spring

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