Electricity for public schools and colleges (1891)
Larden, W. (Walter), b. 1855 or 6 · London : Longmans · leaf 407
igure has a negative poleat the centre, and a positive pole at each end. 3So ELECTRICITY CH. XXII. When the exhaustion is what is usually called good for a lowvacuum, say, for example, that the pressure is only half a millimetreof mercury or about yr^^,^ of an atmosphere, there is observed on… … FiG. i. cules which are charged by contact with the — pole and are thenrepelled. It seems that such molecules are projected from the —pole normally to its surface ; they beat back the other molecules, andat the surface over which this conflict is most energetic there is thebrilliant light as…
Electricity
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