Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 412
n electroscope, it isfound to be neutral. In Fig. 386 is shown a gas pistol, consisting of a metallictube permanently stopped at one end with insulatingmaterial, and having a wire inserted in the stopper so thatit nearly touches one side of the tube. The tube is filled FRICTIONAL ELECTRICITY. 389… … Cylindrical Conductor. similar device for exploding gunpowder. It consists of ablock of wood having a central cavity into which areinserted two wires nearly touching. The powder is placedin the cavity, and the spark sent through the wires, and in Fig. 386. o -t^ $^ Gas Pistol. leaping the space…
Physics · Lantern projection · Electric apparatus and appliances
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