How? or, Spare hours made profitable for boys and girls (1887)
Holbrook, Kennedy · New York, Worthington co. · leaf 283
ctricity from passing off. The tray is also insulatedby placing it upon two tumblers. The sheet of paper is now heated quite hot, placed on a 278 THE ELECTROPHORUS. wooden table, and rubbed with a hard and very dryclothes-brush. Then it is lifted and placed on the tray. The paper is negatively… … The strips by which the paper is lifted can be broughttogether, and held by the thumb and finger of one hand,leaving the other free to take the spark. The paper maynow be replaced. By touching the lower surface of thetray, and lifting the paper as before, another spark maybe obtained, and so on for…
Handicraft · Amusements
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