Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 399
Lengthening the Spark. charge is as illustrated in Fig. 363. In Fig. 364 the dis-charge of positive electricity to a point is exhibited, and Fig. 367. … Discharge over Finely Divided Metal. in Fig. 365 the ends of the discharge rods are shown as theyappear when a considerable distance apart, the machine being FRICTIONAL ELECTRICITY. 377 arranged for the silent discharge. The muhiple appearanceof the small spark of the silent discharge, \vhen the…
Physics · Lantern projection · Electric apparatus and appliances
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