Introductory course of natural philosophy for the use of schools and academies. Ed. from Ganot's popular physics. By William G. Peck (1869)
Ganot, Adolphe, 1804-1887, Peck, William Guy, 1820-1892 · New York A.S. Barnes · leaf 382
Fig. 249. Fitr. 250. If now a piece of a resinous body, as sealing-wax, berubbed with cloth and brought near the excited pith ball,the latter is immediately attracted to the former. In likemanner, if the sealing-wax be first presented to the pen-dulum, it will be attracted and then repelled. If…
Physics
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