Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 402
are endless. The machine itself presents a weird and Fig. 371. … Effect of the Hand on the Discharge. interesting appearance in the dark. From the positive col-lector a luminous brush extends from each point, as shownin Fig. 369, while on the points of the negative collectoronlv stars or luminous points are seen, as represented inFig. 370. Besides these effects…
Physics · Lantern projection · Electric apparatus and appliances
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