Source: wikibot/archimedes-screw
= Archimedes' screw
{wiki=Archimedes'_screw}
Archimedes' screw is an ancient device used for raising water, attributed to the Greek mathematician and inventor Archimedes of Syracuse. It consists of a helical screw enclosed in a cylindrical casing. When the screw is turned, typically by turning a crank or other mechanical means, water is lifted from a lower level to a higher level. The design features a spiral thread wrapped around a central rod or axle.