A string telephone. Engraving from ''Le Telephone'' by T. De Moncel, Paris, 1878.

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Size: 4941px × 4245px
Photo credit: © Universal History Archive/UIG/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1870s, 19th, century, communication, de, engraving, france, le, moncel, paris, physical, physics, sound, string, telephone, waves