AREOMETER
\ˌaɹɪˈɒmɪtə], \ˌaɹɪˈɒmɪtə], \ˌa_ɹ_ɪ__ˈɒ_m_ɪ_t_ə]\
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Apparatus for determining specific gravity of liquids.
By William R. Warner
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An instrument so called because first employed to take the specific gravity of fluids lighter than water. The Areometer of Baumi, which is the most used in Pharmacy, particularly in France, consists of a tube of glass, largely expanded towards its inferior extremity, and terminating below by a small ball, containing mercury or lead, which serves it as a balance, so that it may remain upright in the fluid. This tube is furnished with a graduated scale. If the fluid into which the Areometer is plunged be heavier than water, the instrument rises; if lighter, it sinks. There are various Areometers, as those of the Dutch, of Fahrenheit, Nicholson, &c. The Areometer is also called Hydrometer, (F.) Areometre, Pese-liqueur. There are some hydrometers which have a general application for determining the specific gravities of liquids- as Fahrenheit's, Nicholson's, Guyton de Morveau's, and the common glass hydrometers, including Baume's, Cartier's, Twaddle's, Zanetti's, and the specific gravity beads; others, intended for special application- as for estimating the comparative strength of spirits; the comparative densities of syrups, oils, &c. - as Gay Lussac's, Sikes's, and Dicat's hydrometers, and the saccharometer, urinometer and elaeometer.
By Robley Dunglison
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Instrument for measuring specific gravity of fluids.
By Willam Alexander Newman Dorland
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Syn.: hydrometer. An instrument for measuring the specific gravity of fluids; a hydrometer.[Gr.]
By Smith Ely Jelliffe
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