Elementary treatise on electricity and magnetism : (1905)
Foster, G. C. (George Carey), 1835-1919, Joubert, J. (Jules François), 1834-1910, Porter, Alfred W. (Alfred William), 1863-1939 · London ; New York ; Bombay : Longmans, Green, and Co. · leaf 477
Fig. 317. … Fig. 318. of copper, A and b (Fig. 317), with an interval between them whichmay be closed by a plug. When the plugs are in their places theyconnect the contact pieces into a virtually continuous rod of negli-gible resistance, but when any given plug is removed the corre-sponding coil is brought…
Electricity · Magnetism
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