Siren, invented by Charles Cagniard de la Tour (1777-1859), French engineer and physicist. Engraving, London, 1874.

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Photo credit: © Universal History Archive/UIG/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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Keywords: 1870s, 19th, century, engineer, engraving, french, invention, kingdom, london, physical, physicist, physics, siren, sound, uk, united