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 25
2. Electrification by Contact.—If a pith-ba,ll (a) hung by a fine fibre of raw silk (Fig. 1) is allowed to touch a piece of glass (d),that has been electrified by friction, it is lepelled by the glass aftercontact (Fig. 2). Again, a second pith-ball, similarly hung by a A FUNDAMENTAL PHENOMENA [2-… … Fig. 1. Fig. 2. in fact, they respectively behave towards the glass and india-rubber,and towards each other, just as a second pair of pieces of glassand india-rubber which had been rubbed together would do. Thatis, the two pith-balls have acquired properties exactly like those ofthe glass and…
Electricity · Magnetism
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