Easy electrical experiments and how to make them; (1918)
Dickinson, Leonard Perley, 1874- [from old catalog] · Chicago, F. J. Drake & co · leaf 173
EXPERIMENTS. with one end straightened, and projecting about y2 inch. Theother end is coiled about the rod and is soldered to the latterat A. At K is represented an ordinary spark coil, such as may bebought at dealer in electrical supplies. It can be made veryeasily however by an ingenious boy.… … Lights a Lamp, as to form a very compact bundle. On this as a core, andcarefully insulated therefrom, wind six layers of No. 14 doublecotton covered magnet wire. The coil thus made is represe-sented merely at K. Now connect one terminal of the coil to one terminal of abattery of three sal-ammoniac…
Electric apparatus and appliances · Electricity
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