A text book of physics, for the use of students of science and engineering (1918)
Duncan, John, d. 1941, Starling, Sydney George, 1873- · London Macmillan · leaf 459
Fig. 4)9.—Principle of the Gaedemolecular air pump. … Construction of the Gaede molecular air pump. speeds of 8000 to 12,000 revolutions per minute are sufficient togive a vacuum better than that produced by any other type ofpump. In practice the pump is constructed as shown in Fig. 420. Thecylinder A is grooved, and a tongue C projects from the case…
Physics
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