Photo de stock - Diving bell with two divers on board, circa 1820. An improved version of Edmond Halley's diving bell, this hermetically sealed diving chamber was supplied by air through a copper pipe from the surface. Handcoloured copperplate engraving from Friedrich Johann Bertuch's Bilderbuch fur Kinder (Picture Book for Children), Weimar, 1823.

Photo de stock: Diving bell with two divers on board, circa 1820. An improved version of Edmond Halley's diving bell, this hermetically sealed diving chamber was supplied by.

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