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Published online by Cambridge University Press: 15 September 2014
IN approaching the consideration of the problems afforded by the arterial pressure in man, it is unnecessary to enter deeply into the history of the subject. Tigerstedt (1), Hill (2), Vaschide and Lahy (3), and Janeway (4) have fully analysed the voluminous literature which has grown up around it. It will be sufficient to mention the original experiment of Hales (5), in which the arterial pressure was measured by the height to which the blood rose in a vertical tube connected with the artery, and of Poisseuille (6), and Ludwig (7), who introduced and improved the method of estimating the arterial pressure by means of the mercurial manometer, which has since been modified by many subsequent observers. To obviate some of the disadvantages of the mercurial manometer, which will engage attention at a later stage, Chauveau and Marey (8), and Fick (9), almost simultaneously introduced elastic or spring manometers. These have undergone many alterations at the hands of numerous followers.