An illustration of an Archimedes' screw (also called an Archimedes screw,an Archimedean screw or a screwpump). This is a device invented by Archimedes in the 3rd century BC to transfer water from a lower level into higher irrigation ditches. Turning the screw inside the hollow pipe lifts the water | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / NYPL |
Bildgröße: | 3000 px × 1945 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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