Chicago : [Popular Engineering Pub. Co.] · leaf 629
Cal. solving a pound of sodium bichromate Answer — Procure one zinc and two in a gallon of water, and adding slow- carbon plates, all eight inches long, four ly a pound of strong sulphuric acid. inches wide and y. inch thick. Make This cell gives two volts and a large a clamp of wood which has been… … \\ ATCH DEMAGNETIZE!*. HOME-MADE BATTERY. livering alternating current. Make a — the zinc plate between the two car- cardboard frame a few inches long, and bons. The wood strips of the clamp arc large enough to enclose the watch. each seven inches long; the outer strips Probably the sliding cover…
Electricity
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