The outlines of physics: an elementary text-book (1897)
Nichols, E. L. (Edward Leamington), 1854-1937 · New York, The Macmillan Company; London, Macmillan & Co., Ltd. · leaf 254
nd of the sheet of foil, serves as a handle.By drawing upon the silk thread carefully, the tin foil may be unrolledlike a window shade from its roller. When released it will be rolledup again by the action of the springs. Procedure : (a) Mount the proof plane above the plate of the electroscope,… … Fig. 198. (6) The foil being rolled up, electrify it gradually until the leavesof the electroscope show marked divergence. By means of the silkthread unroll the foil carefully and watch the gold leaves. As theouter suirface of the foil increases In area in the process of being 240 THE OUTLINES OF…
Physics
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