A small cheap underwater breathing device?

What was the earliest device for breathing underwater?

  • Answer:

    1535: A diving bell was developed by Guglielmo de Loreno. 1650: Guericke developed the first air pump. 1715: John Lethbridge built an underwater cylinder that was supplied via an air pipe from the surface with compressed air.

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1535: A diving bell was developed by Guglielmo de Loreno. 1650: Guericke developed the first air pump. 1715: John Lethbridge built an underwater cylinder that was supplied via an air pipe from the surface with compressed air. !

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