Modern electricity and magnetism, theoretically and practically considered (1885)
Avery, Elroy M[cKendree], 1844- [from old catalog] · New York and Chicago, Sheldon and company · leaf 25
Fig. 127. 315. Two Kinds of Electricity. — I7i^ elec-tricity developed on glass is different in kind fromthat developed on sealing-iuax. They exhibited op-posite forces to a third electrified body, each attractingwhat the other repels. … 194 FRlCTIONAL ELECTRICITY. Experiment 22.—Hold tlie silk pad in a piece of slieet-rubberand, with it, rub the glass rod. Suspend the glass rod and bring the silk pad near it. The electrifiedpad will attract the glass, but willrepel a suspended stick of sealing-waxthat has been rubbed with flannel.…
Electricity · Magnetism
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