Press messages sent by telegraph

Developments in the rapid automatic transmission of press messages by wireless telegraphy that are proof against eavesdroppers were employed by the Marconi Company at a new station erected near Geneva to transmit to London the reports of the League of Nations Assembly. In a room adjoining the Assembly Hall in the newspaper correspondents’ reports were punched by a machine in Morse code cypher on paper “tape”, which was fed into a transmitting instrument at the rate of 100 words a minute. Anyone listening in to the telegraphing of these messages would hear a high pitched constant singing note that no operator, however expert, could transcribe.