A WONDERFUL DISCOVERY

Hawera & Normanby Star, Volume LXXVII, Issue LXXVII, 6 June 1919, Page 5

A WONDERFUL DISCOVERY

VOICE CARRIED ON LIGHT RAYS

BY CABLE—PBESS ASSOCIATION-COPYRIGHT

(Aus.-N.Z. Cable Assn.)

LONDON, June 4. The Admiralty has approved of an invention by Dr A. Rankine, of the University College, London, of electric instruments which transmit and receive the natural voice along beams of light—for example, a searchlight or heliograph ray. The invention has been successfully tested over a mile and a half. Dr Rankine says it is easy to greatly enlarge the range, and considers it will be specially useful for vessels to communicate with shore. Persons on the earth will be able to speak to aircraft, and it should prove of great service for sunny countries. It has the advantage of secrecy, as the sound waves cannot be tapped.