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Easy electrical experiments and how to make them; (1918)

Dickinson, Leonard Perley, 1874- [from old catalog] · Chicago, F. J. Drake & co · leaf 89

An illustration from Easy electrical experiments and how to make them;, 1918, leaf 89 — ft hand side to thesmall brass screw just below it, and this part of our apparatuswill be complete. The cover of the box may be screwed on,and we will be ready next to set up the various parts of ourtelephone. 74 EASY ELECTRICAL EXPERIMENTS. CHAP. XXI —HOW <TO MAKE A SET OF TELEPHONE… … F.G.I Fig. *. should be made from a piece of ^-inch board. It should beabout 20 inches long and io inches wide. Fasten the box con-taining the movable hook to the upper part of this board by-screws passing through the bottom of the box. Fasten the trans-mitter first constructed at a convenient…

Electric apparatus and appliances · Electricity

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