Easy electrical experiments and how to make them; (1918)
Dickinson, Leonard Perley, 1874- [from old catalog] · Chicago, F. J. Drake & co · leaf 66
he appearance of the appara-tus as thus far constructed is shown in Fig. 2. In the nextchapter we shall see how to complete the instrument. EASY ELECTRICAL EXPERIMENTS. 51 CHAP. XIV—HOW TO MAKE A SET OF TELEGRAPH IN-STRUMENTS. PART TWO. Having made the coils and mounted them upon the base boardas… … Fig. 3, panying figure. It is Y% inch square, and 2}i inches long. Atone end fasten two pieces of thin brass or iron Y% inch wide andY% inch long. These should project % inch beyond the end ofthe piece of wood. Before fastening them to the wood, punchtwo small holes through them near the projecting…
Electric apparatus and appliances · Electricity
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