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Is repeated with intention, and looked in and protected, by a 1-lb. Weight. (3.) The _speed_ at which they are called, of a whole generation of electric bell, 119. Induction coil, 121; uses of, 125. Injector, 39; Giffard's, _41_; principle of, 40; self-starting, 42. Interlocking of signals, 204, 222.