Cumming, Linnæus, b. 1843. [from old catalog] · New York, D. Van Nostrand · leaf 324
te ends of the lever, contact is madewith two metal studs (B and G) on the base (Fig. 199).When the ivory knob attached to A is not depressed a spring chap, v.] Electro- Magnetism and Dynamics. 305 holds D constantly in contact with C. E and F are bindingscrews connected with the fulcrum and the… … > LINE. In receiving a message from the distant station, the key isleft alone, the current passing from the line through E—A —C—indicator — earth. In sending a message A is depressed, breaking contactwith the home indicator at 0, and introducing the batterycurrent at B, which now proceeds by the…
Electricity
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