• WordNet 3.6
    • n eudiometer measuring instrument consisting of a graduated glass tube for measuring volume changes in chemical reactions between gases
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Webster's Revised Unabridged Dictionary
    • n Eudiometer (Chem) An instrument for the volumetric measurement of gases; -- so named because frequently used to determine the purity of the air.☞ It usually consists of a finely graduated and calibrated glass tube, open at one end, the bottom; and having near the top a pair of platinum wires fused in, to allow the passage of an electric spark, as the process involves the explosion and combustion of one of the ingredients to be determined. The operation is conducted in a trough of mercury, or sometimes over water. Cf. Burette. Ure's eudiometer has the tube bent in the form of the letter. U.
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Century Dictionary and Cyclopedia
    • n eudiometer An instrument originally designed for ascertaining the purity of the air or the quantity of oxygen it contains, but now generally employed in the analysis of gases, for the determination of the nature and proportion of the constituents of any gaseous mixture. One form consists of a graduated glass tube, either straight or bent in the shape of the letter U, hermetically sealed at one end and open at the other. Two platinum wires, intended for the conveyance of electric sparks through any mixture of gases, so as to cause the union of certain of them, are inserted through the glass near the shut end of the tube, and closely approach but do not touch each other. The nature and proportions of the constituents of the gaseous mixture are determined by the diminution in volume after the passing of the spark.
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Chambers's Twentieth Century Dictionary
    • n Eudiometer ū-di-om′e-tėr an instrument for measuring the purity of, or the quantity of oxygen contained in, the air
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Webster's Revised Unabridged Dictionary
Gr. fair, clear weather, fr. fine, clear ( said of the air or weather) + -meter,: cf. F. ediomètre,
Chambers's Twentieth Century Dictionary
Gr. eudios, clear, metron, measure.


In literature:

The combination of the two gases is brought about in a tube called a eudiometer.
"An Elementary Study of Chemistry" by William McPherson
The consideration of the high qualities of art must not be interrupted by the work of the hammer and the eudiometer.
"Modern Painters Volume I (of V)" by John Ruskin
DETONATING TUBE, a species of eudiometer, being a stout glass tube used in chemical analysis for detonating gaseous bodies.
"The New Gresham Encyclopedia" by Various