Modern electricity and magnetism, theoretically and practically considered (1885)
Avery, Elroy M[cKendree], 1844- [from old catalog] · New York and Chicago, Sheldon and company · leaf 78
lashof light. (§ 362.) Experiment 64.—Divide a circleinto black and white sectors, as shownin Fig. 170, and attach it to a whirl-ing table (§ 74). Revolve it so rapidlythat the colors blend and the disc ap-pears a uniform gray. Darken theroom and illuminate the rapidly re-volving disc by the… … Fig. 170. Experiment 65.—In a dark room, place a pieceof loaf sugar in contact with the outside coat of acharged Leyden jar. Place one knob of the dis-charger upon the sugar and bring the other nearthe knob of the jar. When the jar is dischargedthus through the sugar, the sugar will glow forsome…
Electricity · Magnetism
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