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“Mercury manometer for recording blood-pressure. d g, glass U-tube partly filled with mercury. In one limb is borne a float, e, bearing a recording device f; the other limb is filled with a suitable liquid and connected water-tight with the heart end of a divided artery b, by means of glass connection a. Changes in the mercury level indicated changes of arterial pressure.” —Martin, 1917


Health Care


H. Newell Martin, The Human Body (New York: Henry Holt and Company, 1917) 367


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