16.7 MB (939.9 KB compressed)
3000 x 1945 pixels
25.4 x 16.5 cm ⏐ 10.0 x 6.5 in (300dpi)
NYPL / SCIENCE PHOTO LIBRARY NYPL / SCIENCE PHOTO LIBRARY
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.
Model release not required. Property release not required.