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 43
the globe. Remove themquickly, being careful that their edges do not touch the sphereafter the first separation. (Fig. 138.) Bring first one shell and thenthe other near the electroscope; they are electrified. Bring the globeitself near the electroscope. It is no longer electrified.… … Fig. 139. Experiment 29.—By means of a few sparks from the electro-phorus, charge an insulated hollow sphere, having an orifice in the FRICTIONAL ELECTRICITY, 213 top. Bring a.proof plaue (made by fastening a disc of gilt paper toa long, thin insulating handle) into contact with the outer surfaceof…
Electricity · Magnetism
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