Paper model of an Archimedes Screw (aka Archimedean screw, aka screwpump) created by Steve Seidl.
The Archimedes screw is a machine for raising water, allegedly invented by the ancient Greek scientist Archimedes for removing water from the hold of a large ship. One form consists of a circular pipe enclosing a helix and inclined at an angle of about 45 degrees to the horizontal with its lower end dipped in the water; rotation of the device causes the water to rise in the pipe. -Encyclopædia Britannica
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