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 188
favor. 236. Mercury Pumps. When a very high vacuum is neededglass pumps are used in which mercury plays a part somewhatanalogous to that of a piston. Of these there are two chief forms. In Toeplers form (Fig. 130) a glass bulb A is connected by aflexible tube with a mercury reservoir B which can be…
Physics
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