Canada Meter Sisters 5

Document Text (OCR)

Above are shown Dr. Walter S. Huxford of Northwestern University and A. H. Nether- cot, Jr.. testing a German “Lichtsprecher” telephonic communication device. The in- strument provides telephonic communication on rays of invisible light, a principle ex- pounded by researcher John Otto of Chicago who has done considerable work in space craft and extra-terrestial commrunications. The transmission of sound by light rays may hold the secret of communication in space. Radio signals have been...