MARVELS OF WIRELESS.

Otago Witness, Issue 3399, 7 May 1919, Page 26

MARVELS OF WIRELESS.

Dr Leo De Forrest, the noted wireless telephone expert and inventor, has predicted that in the summer of 1919 it will be possible for the human voice spoken into the transmitter of _ the radio-telephone to be heard 12,000 miles away, or nearly halfway round the .world. The feat would extend the present wireless telephone distance 6000 miles at one leap. Dr De Forrest said: "This advance in the progress of radio engineering "is assured through the experiments of Dr Alexanderson, of the General Electric Company, who has been the world pioneer in the construction of high frequency alternators and in generating alternating currents which can be applied to antennae and radiated from wireless signalling. His latest product is a current of approximately 15,000 meti-es wave length." It was further explained by Dr De Forrest that all this energy can be controlled so as to be modulated in perfect conformity withspeech waves, and be transmitted halfway round the world. He said also that the use of the audio makes possible the .amplification of sounds received to any desired degree, so as to be heard throughout a large auditorium. Music lovers in New Zealand, for instance, will be able to hear concerts by artists in New York, Paris, and London as plainly and dis tinctly as persons attending the actual renditions.