| 41. | In Halley's diving bell, atmosphere is replenished by sending weighted barrels of air down from the surface.
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| 42. | The book was Bauby's " The Diving Bell and the Butterfly " ( Knopf, $ 20 ).
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| 43. | They are transferred between the surface accommodation and the underwater workplace in a pressurised closed diving bell.
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| 44. | With a simple diving bell, the team of Swedish and Finnish divers retrieved more than 50 of them.
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| 45. | The diving bell is the elevator or lift that transfers divers from the system to the work site.
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| 46. | Vyrelkin said divers would have been able to evacuate survivors quickly using diving bells pressurized from the surface.
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| 47. | Degener remembers that first dive, when he and his partner dropped from a diving bell into the murky sea.
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| 48. | Each consisted of one man in a diving bell that brought them to the bottom and two others outside.
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| 49. | Their Norwegian colleagues assisted from inside a diving bell lowered to the wreckage from the divers'mother ship, the Regalia.
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| 50. | Diving bells were developed in the 16th and 17th century as the first significant mechanical aid to underwater diving.
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