Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 384
is electrified, present it to theball. If the lea\es mutually repel each other and diverge,electricit) is present. A slight touch of a glass rod, a rub-ber comb (^r ruler, or a wooden ruler, upon the clothing orcarpet, or even uj^tu a wooden surface, develops electricity … Electroscope. 362 EXPERIMENTAL SCIENCE. in sufficient quantities to affect tlie electroscope. Very littlefriction is required to evoke a perceptible amount of elec-tricity. One movement of the clothes brush upon theclothes or carpet affects the electroscope from a long dis-tance. A feather duster…
Physics · Lantern projection · Electric apparatus and appliances
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