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Scientific American, Vol. 87, No. 18 (1902) (1902)
leaf 7
oats, arid torpedoed the battleship “Jau- heard in the telephone receiver. In order that the reguiberry” and the cruiser “Admiral Charner.” The direct sound waves may not give rise to any disturb- “Gymnote” achieved this feat with only the top of ing sounds the optic telephones are in most… … rupted. tigue. © 1902 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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