COLLECTION ABECASIS / SCIENCE PHOTO LIBRARY COLLECTION ABECASIS / SCIENCE PHOTO LIBRARY
Century diving bell. Scottish engineer Charles Spalding. This early diving apparatus allowed someone to breath underwater by supplying the diver with air from inside the bell through a hose. Spalding improved on existing designs by adding a system of balance-weights to ease the raising and lowering of the bell, along with a series of ropes for signalling the surface crew.
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