A

David

Darling

bathysphere

A bathysphere was a hollow steel sphere suspended by cables from a surface ship and used for deep-sea research before the development of the bathyscaphe. The first bathysphere was built and used by the the engineer Otis Barton and the naturalist William Beebe in 1930; diving of Bermuda in 1934 they reached a then-record depth of 3,023 feet (923 meters).