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 71
electrifying the inner surface of a glass tumblerby rubbing it upon the knob of the prime conductorand placing the tumbler over some pith balls on thetable. Experiment 40.—Place a dozen pith balls or someFig. 157. bits of tissue paper on a table between two booksabout 2 inches (5 cm,) thick. Place…
Electricity · Magnetism
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