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| | Inventor of the Week: Archive |
 | | In 1932, the pair tested a larger bathysphere off the coast of Nonsuch Island, Bermuda, where they were successfully submerged 3,028 feet and set a world record that stood for 15 years, until Barton created a vessel called a Benthoscope in 1949, which allowed submersion to a depth of 4,500 feet. |
| | A bathysphere is a hollow, steel sphere with very thick walls made to maintain a reliable pressurization at depths where diving unaided is not possible. |
| | The interior of the bathysphere was rather small and cramped, with only a light and telephone, oxygen tanks, and chemicals soda lime to absorb carbon dioxide and calcium chloride to absorb moisture. |
| web.mit.edu /Invent/iow/barton.html (600 words) |
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