The Diving Bell

The diving bell was an early diving submersible used for underwater exploration, sponge fishing, and salvaging sunken cargo. It consisted of a bottomless chamber connected to a compressed-air hose that would both refresh the air inside the chamber and maintain enough pressure to keep water from filling it as it descended. In the 16th century, inventor Guglielmo de Lorena created and used what is considered the first modern diving bell. What 4th-century philosopher first described such a device? Discuss


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