Elementary treatise on electricity and magnetism : founded on Joubert's "Traité élémentaire d'électricité" (1909)
Foster, G. Carey (George Carey), Porter, Alfred William, 1863-1939, Joubert, Jules François · London : Longmans · leaf 138
Fig. 61. … Fig. 62. the carriers of the replenisher. The influencing conductors arerepresented by two strips of tinfoil fixed to the centre of the paperarmatures. They are connected with two small biushes whichtouch the studs just before their passing under the combs; thesebrushes play the same part as the…
Electricity · Magnetism
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