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 460
of the vapours. Anexternal view of the pump is givenin Fig. 421. Very low pressures can he ob-tained by first exhausting thevessel as thoroughly as possibleby means of a pump. A tubecontaining coconut charcoal, andin communication with the vessel,is immersed in a bath of liquidair. The remainder of… … Fig. 421.—-Gaede molecular air pump. pressures. A vertical tube ABCD is sealed at its top end ; the portionAB is of small bore and there is a large bulb between B and C. Thelower end is connected by flexible tubing to a mercury cistern Efurnished with a tap. A branch at C leads to another tube FG,…
Physics
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