Photo detail

Camera Maker Nikon Corporation Camera Model NIKON D7500
Aperture f/10 Color Space sRGB
Exposure Value -2 EV Exposure Program Aperture Priority
Exposure Time 1/3 sec Flash No Flash
Focal Length 18 mm ISO 200
Metering Mode Pattern Date/Time 2017:12:22 15:21:17
Resolution Unit Inch X Resolution 240 dots per ResolutionUnit
Y Resolution 240 dots per ResolutionUnit Compression Jpeg Compression
Contrast 0 Exposure Mode 0
Saturation 0 Scene Type Directly Photographed
Sharpness 0 Caption Versions of this ingenious pump have been around since ancient times and are still used today. It is usually called an Archimedes Screw, after the Greek scientist who may have invented it. In Leonardo's design, a crank rotates a spiral tube that funnels water from the bottom of the tube to the top. He had in mind a variety of uses, from lifting water out of wells to draining marshes and harbors.