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 114
Fig. 50. Fig. 51. their mutual fiiction the particles of the two powders become elec-trified, the red-lead positively and the sulphur negatively, and theyconsequently attach themselves to parts of the surface of the resinwhich have been electrified in the opposite way to themselves.The lines formed…
Electricity · Magnetism
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