The elements of natural philosophy : copiously illustrated by familiar experiments and containing descriptions of instruments, with directions for using : designed for the use of schools and academies (1856)
Sprague, A. W. (Alfred White), 1821-1891 · Boston : Phillips, Sampson & Company · leaf 191
le of electric induction, may be ex-plained the attraction and repulsion shown in sections 152-3. The Electrophorous^ Fig. 153. is an instrument whose actionis due to this same cause. Acircular metallic basin, B, isfilled with melted wax, andcooled, so as to leave a smoothand even surface. This… … State the proposition section 156. How illustrated by the previous experi-ment? Describe the Electrophorous. 16^ 186 INDUCTION. Experiment. — Rub the wax disc of the Electrophorousbriskly with a warm iSiannel, or. which is better, whip it with acatskin, and the wax will become negatively…
Physics
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