Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 441
^ passesfrom tlie screw C to spring D and … Fig. 521. —Electric bell and its connections.At G is shown a section of the push-button. The figure shows the bell whenthe button is not pressed. The currentmay pass in either direction through thebell.
Physics
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