Siphon barometer
Barometer Ba*rom"e*ter, n. [Gr. ba`ros weight + -meter: cf. F. barom[`e]tre.] 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. [1913 Webster]

Note: The barometer was invented by Torricelli at Florence about 1643. It is made in its simplest form by filling a graduated glass tube about 34 inches long with mercury and inverting it in a cup containing mercury. The column of mercury in the tube descends until balanced by the weight of the atmosphere, and its rise or fall under varying conditions is a measure of the change in the atmospheric pressure. At the sea level its ordinary height is about 30 inches (760 millimeters). See {Sympiesometer}. --Nichol. [1913 Webster]

{Aneroid barometer}. See {Aneroid barometer}, under {Aneroid}.

{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. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Siphon barometer — Siphon Si phon, n. [F. siphon, L. sipho, onis, fr. Gr. ??? a siphon, tube, pipe.] 1. A device, consisting of a pipe or tube bent so as to form two branches or legs of unequal length, by which a liquid can be transferred to a lower level, as from… …   The Collaborative International Dictionary of English

  • siphon barometer — noun : a J shaped mercury barometer having the longer leg closed at the top and the other exposed to the air * * * siphon barometer, a barometer with the lower end of the tube bent in the form of a siphon …   Useful english dictionary

  • siphon barometer — sifoninis barometras statusas T sritis automatika atitikmenys: angl. siphon barometer vok. Heberbarometer, n rus. сифонный барометр, m pranc. baromètre à siphon, m …   Automatikos terminų žodynas

  • siphon barometer — sifoninis barometras statusas T sritis Standartizacija ir metrologija apibrėžtis Barometras, kurio pagrindinė dalis yra stiklinis U pavidalo vamzdelis su gyvsidabriu. Ilgesnė vamzdelio dalis yra uždaryta. atitikmenys: angl. siphon barometer vok.… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • siphon barometer — sifoninis barometras statusas T sritis fizika atitikmenys: angl. siphon barometer vok. Heberbarometer, n rus. сифонный барометр, m pranc. baromètre à syphon, m …   Fizikos terminų žodynas

  • Siphon — Si phon, n. [F. siphon, L. sipho, onis, fr. Gr. ??? a siphon, tube, pipe.] 1. A device, consisting of a pipe or tube bent so as to form two branches or legs of unequal length, by which a liquid can be transferred to a lower level, as from one… …   The Collaborative International Dictionary of English

  • Siphon bottle — Siphon Si phon, n. [F. siphon, L. sipho, onis, fr. Gr. ??? a siphon, tube, pipe.] 1. A device, consisting of a pipe or tube bent so as to form two branches or legs of unequal length, by which a liquid can be transferred to a lower level, as from… …   The Collaborative International Dictionary of English

  • Siphon condenser — Siphon Si phon, n. [F. siphon, L. sipho, onis, fr. Gr. ??? a siphon, tube, pipe.] 1. A device, consisting of a pipe or tube bent so as to form two branches or legs of unequal length, by which a liquid can be transferred to a lower level, as from… …   The Collaborative International Dictionary of English

  • Siphon cup — Siphon Si phon, n. [F. siphon, L. sipho, onis, fr. Gr. ??? a siphon, tube, pipe.] 1. A device, consisting of a pipe or tube bent so as to form two branches or legs of unequal length, by which a liquid can be transferred to a lower level, as from… …   The Collaborative International Dictionary of English

  • Siphon gauge — Siphon Si phon, n. [F. siphon, L. sipho, onis, fr. Gr. ??? a siphon, tube, pipe.] 1. A device, consisting of a pipe or tube bent so as to form two branches or legs of unequal length, by which a liquid can be transferred to a lower level, as from… …   The Collaborative International Dictionary of English

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