Easy electrical experiments and how to make them; (1918)
Dickinson, Leonard Perley, 1874- [from old catalog] · Chicago, F. J. Drake & co · leaf 185
SY ELECTRICAL EXPERIMENTS. before winding the wire, and provide also circular woodenends for the coil, which fit tightly upon the iron core, andhold the wire in place. The end of core should project %inch beyond end of coil. Make a base board by taking a piece of smooth pine, orwhitewood, % inch… … place by a block screwed to the base, the lower part of theiron core being fitted into a slot cut in the base. At a distance of 2% inches from the same end of theboard, and in the center, mount very firmly a post, 2% incheshigh and y2 inch square. This is shown at P. Having procured an old clock,…
Electric apparatus and appliances · Electricity
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