xtending exterior coil was at two centimeters from the extremity of from near the coast for a distance of 30 or 40 miles inland, it the inducing coil. The currents produced by the voice in a is absolutely unknown elsewhere in the world. The trunk second telephone caused no variation in the height… … the wires joined the battery and the manipulator as being very fond of anything practical, and as be- with the receiver of a Morse apparatus; the earth line ing delighted with anything in the shape of experi- was formed by the gas pipes. The two extremities ment, even, apparently, when practiced…
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