Periscope
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A periscope is a device for observation over, around or through an object, obstacle or condition that prevents direct line-of-sight observation from an observer's current position.
Australian Light Horse troops using a periscope rifle, Gallipoli, 1915. Photograph by Ernest Brooks.
A team of German artillery observers using periscope binoculars, 1943
1889 Arthur Krebs & Jean Rey periscope for the French submarine Gymnote
Officer at periscope in control room of a U.S. Navy submarine in World War II
Morgan Robertson
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Morgan Andrew Robertson was an American author of short stories and novels, and the self-proclaimed inventor of the periscope. Robertson is best known for his 1898 novel Futility, famous for the simil
Periscope
…two small mirrors fixed at each end at 45°. Simon Lake used periscopes in his submarines in 1902. Sir Howard Grubb perfected the device in World War I. Morgan Robertson (1861–1915) claimed to have tried to patent the periscope: he described a submarine using a periscope in his fictional works. Periscopes, in some cases…
Robertson between 1890 and 1900