Mercurial Barometer
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A mercurial barometer: “The cup or cistern of mercury is at A. By means of the screw C the mercury is forced up until the mercury surface in A is brought to the little pointer shown at B, which is the zero or beginning of the barometer scale. The height of the mercury in the tube is then read off from the scale at C. D is an attached thermometer.” -Waldo, 1896
Keywords
air pressure, mercurial barometer, mercury barometer, meteorology tool, meteorological instrumentGalleries
MeteorologySource
Frank Waldo Elementary Meteorology (New York, NY: American Book Company, 1896)
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