Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 385
described lateron. An ordinary elastic rubber band drawn across the edgeof the desk develops sufficient electricity to widely diverge … Experiment with Electroscope. the leaves. The rubber band affords a curious example ofthe distribution of electricity on an extensible surface. Ifafter electrification the rubber band is held over the electro-scope, and alternately elongated and allowed to contract,the leaves of the electroscope…
Physics · Lantern projection · Electric apparatus and appliances
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