Abstract
The Archimedes screw, consisting of a helix (or helicoid, to be precise) inside a tube, is an efficient machine for lifting water (Fig. 43.1). Its elegant design has a distinctly “modern” look, and it is still the mechanism of choice for some engineering applications. Surprisingly, the Archimedes screw was in common use already in classical times, by the Greeks, Romans, and Egyptians. It is described in detail in several classical texts, including Vitruvius’ De Architectura, where the invention was ascribed to Archimedes.
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