PICTURES BY WIRELESS

Evening Post, Volume CXII, Issue 3, 3 July 1926, Page 20

PICTURES BY WIRELESS

PHOTOGRAPH IMPRESSIONS THROUGH V THE NIGHT.

Flashing through the night, electric impulses which carry photographic impression have been shot out over the Pacific in new efforts to harness science to practical ends (says the Montreal "Witness"). The Radio Corporation of America, reversing previous tests, attempted to send news pictures from New York to Honolulu, relaying them fiota a high-powered Alexanderson alternator at the firm's 200 kilowatt station in San Francisco. Pictures tfßve been sent from Honolulu to the United States on two occasions, first when the United States fleet was operating in Hawaiian waters, and again when Commander John Eodgers and his crew of the Navy seaplane PN 9-1 were saved after their dramatic voyage. Tho Kodgers photographs came through fairly successfully, but radio officials feel that better results can be obtained, and arranged this new test. A. J. Koenig, photo-radio engineer, was sent from New York to Honolulu to handle the reception, and B. E. Mathes was the engineer in Charge of the experiment at San Francisco. Pictures are sent through the air in much the same way as by closed circuit telegraph or telephone wires. An intense light is directed to a glass cylinder, containing the film. A hammer device, registering on a photo-electric cell, is controlled by the light as it passes through the film. The light and dark places cause different motions, and the device Records these currents, which aro then amplified and sent into the air. The receiving station reverses the process, and tho light and dark spaces of the original photographs are recorded. /