AUTOMATIC RADIO INVENTION.
* SUCCESSFUL EXPERIMENTS. '"ITED PRESS ASSOCIATIO.-. -BJr* £i<fc,CTRX3 lELBGKAFU—COPYRIGHT.) ROME, November 19. The Alarehese Marconi haa successfully experimented with automatic radio-telephony from his yacht Electra at Genoa, and will shortly make tests on a larger scale by connecting the tele* phone systems between Rome and Cagr liari, enabling tt person in Rome to ring up a number at Cagliari, 250 miles away. The impulses will be transmitted by s'iort-wave wireless, and once a connexion is established conversation will be carried on in the ordinary way with wire, less telephony. The conversation will be secret as the system is based on the inversion of audible frequencies, which distorts thfe spoken word, making it unintelligible except when heard through certain apparatus.
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Press, Volume LXVI, Issue 20091, 21 November 1930, Page 15
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121AUTOMATIC RADIO INVENTION. Press, Volume LXVI, Issue 20091, 21 November 1930, Page 15
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