A Recording Mercurial Manometer for the Pressure Range 0–760 mm of Mercury

Abstract
A recording mercurial manometer which covers the range 0–760 mm of Hg is presented. A Nichrome V or Chromel A resistance wire is concentrically positioned in the mercury column of a large bulb manometer. The resistance of this wire is part of a direct current bridge circuit with a recording potentiometer as the balance indicating device. An electrical circuit which is designed to handle a variety of experimental conditions is presented.

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