Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 613
waves comingover the wire into sound-waves once more. In all long-distance telephoning, thesethree elements enter: the transmitter, thetelephone-repeater, and the electro-magneticreceiver. But the great achievement ofArmistice Day required still another devicefor its accomplishment. This is the… … THE SPECIALLY SENSITIVETRANSMITTER change the electric waves into sound-waves,and a great wooden horn (or cluster ofthem) not unlike an ordinary megaphone. Inthe present instance, these horns, or pro-jectors, were ten feet long, while their largerectangular mouths were about three feetby a foot and…
Children's literature
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