WHEREAS HALF A CENTURY AGO RAPIDITY OF TRANSMISSION OF INFORMATION WAS MEASURED BY THE SPEED OF COURIERS, MODERN ARMIES EMPLOY ELECTRICITY FOR DISSEMINATION OF MILITARY INTELLIGENCE, .USING INSTRUMENTS SIMILAR TO THE EFFICIENT LITTLE BUZZER, HERE ILLUSTRATED from the ' Military Signal Corps manual ' by James Andrew White, Publication date 1918 Publisher New York : Wireless Press, inc.

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Location: USA
Photo credit: © Historic Illustrations / Alamy / Afripics
License: Royalty Free
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