Elementary treatise on electricity and magnetism (1903)
Foster, George Carey, 1835-1919, Joubert, Jules François, 1834-1910. Traité élémentaire d'électricité, Porter, Alfred William, 1863- joint author · London, New York, Longmans, Green, and co. · leaf 124
contact with the glass,further pressure does not increase the electrification. The surfaceof the rubber should be covered with a conductor such as that 72] FRICTIONAL MACHINE 101 variety of sulphide of tin known as aurum muaiimm, oi, still better,with Kienmayers amalgam, which is composed of zinc,… … Fig. 54. difference of potentials between them, the glass becoming positivelyelectrified, and the rubber negative. This difference of potentialsis at first very small, since the equal oppositely electrified surfacesare very close together. But as each portion of the glass movesaway from the rubber,…
Electricity · Magnetism
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