Gage, Alfred P. (Alfred Payson), 1836-1903 · Boston, London, Ginn · leaf 277
f this defect in a ther-mometer is called the displacement of zero. The graduation of astandard thermometer is made on the glass stem, and thus com-plication due to difference of dilation of different substances isavoided. 218. Determination of extremely high temperatures. Pyrom-eter. Ajiy… … Fig. 203. a change of temperature affects the electricalresistance of a metal. A hydropyrometer indi-cates high temperatures by the number ofdegrees a given mass of water is raised, bythe immersion in it of a platinum ball ofknown weight after it has acquired the tem-perature, for instance, of a…
Physics
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