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 166
Fig. 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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