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 165
riG. 95. … 142 GALVANIC OR VOLTAIC BATTERY [100- the copper end is applied against the lower plate of a condensingelectroscope, the top plate of which is touched by the other hand(Fig. 96). If the connections are broken and the top plate is raised, the gold leaves diverge,with negative electricity ;…
Electricity · Magnetism
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