01 n. An instrument for determining the weight or pressure of the atmosphere, and hence for judging of the probable changes of weather, or for as…
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1.
An instrument for determining the weight or pressure of the atmosphere, and hence for judging of the probable changes of weather, or for ascertaining the height of any ascent.
Phrases & compounds
Marine barometer —
a barometer with tube contracted at bottom to prevent rapid oscillations of the mercury, and suspended in gimbals from an arm or support on shipboard.
Mountain barometer —
a portable mercurial barometer with tripod support, and long scale, for measuring heights.
Siphon barometer —
a barometer having a tube bent like a hook with the longer leg closed at the top. The height of the mercury in the longer leg shows the pressure of the atmosphere.
Wheel barometer —
a barometer with recurved tube, and a float, from which a cord passes over a pulley and moves an index.