The standard electrical dictionary : a popular encyclopaedia of words and terms used in the practice of electrical engineering (1898)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · London : Crosby Lockwood and Son · leaf 443
of air below, itcuts off the tube, rising vertically from it. This tube, d in the fullfigure connects with a vessel <?, pressure gauge p^ and tube c, thelatter connecting with the object to be exhausted. The bulb Bbeing filled, the cock in is closed, giving the position Y and the 438 STANDARD… … Fig. 276. Geissler Air Pumi. from the vessel connected to C. This process is repeated until fullexhaustion is obtained. In practice the first exhaustion is often STANDARD EIvBCTRICAIv DICTIONARY. 439 effected by a mechanical pump. By closing the cock on the outlettube c but little air need ever…
Electricity
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