Elementary lessons in electricity & magnetism (1895)
Thompson, Silvanus P. (Silvanus Phillips), 1851-1916 · New York and London, Macmillan and co. · leaf 47
an electrified body at any point, partof the charge flows into it, and it may be then removed,and the sample thus obtained may be examined with agold-leaf electroscope in the ordinary way. For some CHARGE ON SURFACE 39 purposes a metallic bead, fastened to the end of a glassrod, is more convenient… … Fig charge. But if the proof-plane be carefully insertedthrough the opening, and touched against the inside ofthe globe and then withdrawn, it will be found thatthe inside is destitute of electrification. An electrifiedpewter mug will show a similar result, and so will evena cylinder of gauze wire.…
Electricity
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