Aristotle describes a diving bell
Last updated: November 1, 2017 at 2:50 am
[ 332 BCE ] Aristotle describes a diving bell in his Problematum. The bell has an open bottom and is lowered upright into the water. It is used by sponge divers in the Aegean. Aristotle also mentions that the sponge quality improves with depth. The diving bell is also used by Alexander the Great to explore the Mediterranean under the guidance of Ethicus the astronomer, and during the siege of Tyre. The Greek king’s diving bell was called Colimpha. The diving bell was by far the most used method of diving for the next 21 centuries.