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Megaphone communications, 19th century

Megaphone communications, 19th century

C033/0672

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Credit

SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY

Caption

Megaphone communications. The amplification of the soldier's voice has enabled communication over a distance of some four kilometres. This illustration is from 'Physique Populaire' (Emile Desbeaux, 1891).

Release details

Model release not required. Property release not required.

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