Back MatterSource: The Scientific Monthly, Vol. 64, No. 6 (Jun., 1947)Published by: American Association for the Advancement of ScienceStable URL: http://www.jstor.org/stable/19222 .

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44

...a Kodak color film you canl process yourself * Ektachrome Film meets the need parency from which color prints can of the worker who wants to compare be made if wanted. the finished photographic result in full Ektachrome comes in the same sheet color with his specimen while it is still sizes as Kodachrome Professional Film, set up. in both daylight and Type B (3200?K.

The user of Ektachrome processes it source) color balance with approxi- in his own darkroom in ninety minutes, mately the same emulsion speeds. without special equipment and with Ektachrome Film and Ektachrome materials just as safe as ordinary de- Processing Kits with instructions are velopers. He obtains a positive trans- now available from your Kodak dealer.

EASTMAN KODAK COMPANY ROCHESTER 4, N. Y.

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RCA Communications' new world-wide automatic tape relay re.dio system speeds Radiograms.

New wings for words around the world!

Radiograms "Via RCA" to and from overseas points now are processed by automatic machines which speed your messages through such gate- way cities as New York, London, San Francisco and Manila, without delay.

This advanced technique in in- ternational radiotelegraphy is the result of war-time research and development. It gives to private messages the same speed, accuracy and dependability which were at- tained through its use by the U. S. Army Commuinications Service during the war.

IR (A T Lah,r t"r i, n".-o of the.

world's foremost centers of radio and electronic research-is contin- ually pioneering and advancing radio communications in service to the Nation and the public.

When you buy an RCA Victor radio or television receiver, Victrola radio-phonograph, or phonograph record, you are getting, thanks to RCA research and engineering, one of the finest produc-ts of its kind science h-s achieved.

"Victrola" T. M. Reg. U. S. Pat. 01.

Radio Corporation of America, RCA Build- ing, Radio City, NIew York 20. Listen to the RCA Victor Show, Sundays, 2:00 P. M., Eastern Daylight Saving Time, over- NBC.

At RCA CorinmniiicatioiiLs, "Package Sets" contain an auito- matic sending and receiv'ing unit for a foreign gatewav city. Mes- sages in tape form and received through these machines, are ready for delivery or immediate trans- mission to any part of the world.

'4 RADIO CORPORATION of AMERICA

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