Duff, A. Wilmer (Alexander Wilmer), b. 1864, ed, Guthe, Karl Eugen, 1866-1915, Hallock, William, 1857-1913, Lewis, E. Percival (Exum Percival), 1863-1925, Goodspeed, Arthur W. (Arthur Willis), b. 1860, Carman, Albert Pruden, b. 1861, McClung, Robert Kenning, 1874- · Philadelphia, P. Blakiston's Son & Co · leaf 201
rrying nearthe end of the capillary a fine pointer.The gas is shut off from the outer airby mercury contained in this U-tube.In order to keep the volume of theenclosed gas constant, the mercury isalways adjusted so that its surface on the side of the tube con-nected with the capillary just touches… … Fig. 133. THERMOMETRY. 185 tube, a small correction being necessary on account of the changein volume of the containing vessel. In the standard hydrogen thermometer the hydrogen gas isunder a pressure of 100 cms. of mercury at the temperature ofmelting ice but it will give accurate results, even if…
Physics
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