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How did people pump water in ancient times?
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 | | An Archimedes' screw is a simple kind of pump used for raising water. |
The Archimedes' screw is a pumping device named after the ancient Greek scientist Archimedes (282-212 BC). It is thought that he invented it to pump water from ships. The pump consists of a screw fitted inside a sloping cylinder. The lower end of the cylinder is placed in a stream, and the screw rotated by a handle. This 'screws' the water up the cylinder through the screw's thread, until it reaches the top.
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Previous:
Back
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Book:
1001
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Section:
Science and Technology
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Chapter:
Machines
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