'Diving bell invented by Edmond Halley (1656-1743) being used in salvage operation. Barrel, C, reservoir of air connected by tube to bell. Diver, F, wears helmet connected to bell by tube. Engraving 1782.'.
'Diving bell invented by Edmond Halley (1656-1743) being used in salvage operation. Barrel, C, reservoir of air connected by tube to bell. Diver, F, wears helmet connected to bell by tube. Engraving 1782.'