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 468
ment aperiodic. The coil isdivided into two parts, which may be movedalong a divided scale, and thus the sensitivenessmay be varied at pleasure. There may be severalsets of coils with wires of various thicknesses.The mirror is placed in a small chamber with aglass front, and can be turned in any… … Fig. 309.
Electricity · Magnetism
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