Merchant, F. W. (Francis Walter), 1855-1937, Fessenden, Cortez, b. 1852 · Toronto : Copp, Clark · leaf 322
agnet. Connect with abattery as in last experiment and try to use the bell forpurposes of signalling. Fig. 253. THE EFFECTS OF THE ELECTRIC CURRENT. 313 7. Electric Telegraph- Experiment 3 illustrates the principle of the electrictelegraph. Instead of closing and opening the circuitby touching the… … Fig. 254. insulated from the frame, and the upper being mountedon the lever L which is connected with the binding postB by means of the frame. The key is placed in thecircuit by connecting the ends of the wire to the bindingposts. When the lever is pressed down the platinum pointsare brought into…
Physics
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