ish engineer, Valdeiuar Poulsen. The wire. The ribbon, A, passes from one rollover a stand- net off the wire when not in use. principle of the apparatus will be understood ard mounted in the middle of the apparatus to a In order to reproduce conversations with the utmost from the diagram, Fig. 1,… … ces, in which he explained its principles. He goes a series of variations corresponding to Fig. 4.—FOTTLSEN'S BIBBON TELEGBAFHONE. also noted an interesting experiment which the original sound waves. These magnetic has been made by his assistant, M. Pederson, pulsations act in turn upon the steel…
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