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Scientific American

July 4, 1914

1 min read

An Underwater Siren to Prevent Collisions at Sea

Prof. R. A. Fessenden's Latest Invention

By P. Harvey Middleton

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More by P. Harvey Middleton

This article was originally published with the title “An Underwater Siren to Prevent Collisions at Sea” in Scientific American Magazine Vol. 111 No. 1 (July 1914), p. 8
doi:10.1038/scientificamerican07041914-8

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