spherical deep diving apparatus (lowered by a cable) for underwater exploration
The Bathysphere (Greek words β?θu? (bathus), "deep" and σφα?ρα (sphaira), "sphere") is a spherical deep-sea submersible which was unpowered and lowered into the ocean on a cable, and was used to conduct a series of dives off the coast of Bermuda from 1930 to 1934. The Bathysphere was designed in 1928 and 1929 by the American engineer Otis Barton, to be used by the naturalist William Beebe for studying undersea wildlife.
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