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 27
Fig. 4. Fig. 5. flint-glass and ebonite are among the most efficient and convenientfor practical purposes. Glass, however, is apt to become coveredwith a conducting film of moisture deposited from the atmosphere.This can sometimes be prevented by keeping it slightly warm—not hot, as it then…
Electricity · Magnetism
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