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Scientific American 1918-04-27

ScientificAmerican1918-04-27.jpg Scientific American 1917-07-14ThumbnailsScientific American 1918-06-01Scientific American 1917-07-14ThumbnailsScientific American 1918-06-01Scientific American 1917-07-14ThumbnailsScientific American 1918-06-01Scientific American 1917-07-14ThumbnailsScientific American 1918-06-01Scientific American 1917-07-14ThumbnailsScientific American 1918-06-01

A narrow escape from a German ruse: the decoy periscope mine.