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APR! 7 25 ©C1B657845
RADIO BROADCAST
Vol. 7, No. 1
May, 1925
A New Method of Transmitting Pictures by IVire or Radio
A Review of Existing Methods of Sending Photographs — Details of the Cooley System Never Before Published — An Efficient and Very Fast Transmitter Whose Applications are Many and Important
By CHARLES C. HENRY
IMAGINE, a hundred messengers delivering photographic reproductions of business letters, photographs, printed matter, legal papers, social correspondence, and innumerable forms of communication received from distant points by a single instrument. The instrument that will accomplish this is already known to many as a phototelegraphic receiver. Few even of those who -havefollowed the recent developments in phototelegraphy appreciate the huge commercial and economic importance it will have in the near future.
Most of us read with interest the accounts of the transmitting of photographs across the Atlantic and admired the engineering achievement of reproducing them with such fidelity here in America. In hundreds of magazines and papers, copies of the received pictures of President Coolidge, Secretary Hughes, the Prince of Wales, and others were prominently displayed.
The whole world has heard about the transmission of the 1924 Republican Presidential Convention pictures by the American Telephone and Telegraph Company. The quality
of the pictures received in New York from Cleveland compare favorably with the average newspaper picture.
The Chicago Tribune, the New York Daily News, and the Los Angeles Times have been tied together for several months with the Marvin Ferree system of phototelegraphy operating over leased telegraph lines. Pictures are exchanged daily between these prominent newspapers and appear in their columns beside other news pictures. There is no noticeable difference in quality between the two. The trade name "Telepix" is attached to all of these telegraphed photos.
Not long ago, C. Francis Jenkins, of Washington, D. C, conducted radio phototransmission experiments between Anacostia, Maryland, and Medford Hillside, Massachusetts. His received pictures were badly mutilated by commercial radio telegraph traffic because of the particular wavelength used; but with better radio facilities at his command, it is likely that his test pictures would have been quite successful.
Edouard Belin is at present in New York engaged in the intensely interesting experiment