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horizontal waterwheel
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airplane in flight (plane, aircraft, flying)
7 Puzzling Plane Disappearances
Paul Revere. "The bloody massacre perpetrated in King Street Boston on March 5th 1770 by a party of the 29th Regt.," engraved by Paul Revere. Boston Massacre.
There’s a Riot Goin’ On: Riots in U.S. History (Part One)
Middle East bee locator map
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Lake Mead (the impounded Colorado River) at the Hoover Dam. The light-coloured band of rock above the shoreline shows the decrease in water level in the first few years of the 21st century.
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An ancient egyptian hieroglyphic painted carving showing the falcon headed god Horus seated on a throne and holding a golden fly whisk. Before him are the Pharoah Seti and the goddess Isis. Interior wall of the temple to Osiris at Abydos, Egypt.
11 Egyptian Gods and Goddesses
Estimated battle casualties, Normandy invasion, World War II. WWII, D-Day
Estimated Battle Casualties During the Normandy Invasion and Campaign to Liberate Paris (June–August 1944)
Close up of praying mantis walking on stone ground against a blurred background in Japan
6 Animals That Eat Their Mates

horizontal waterwheel

Learn about this topic in these articles:

use in energy conversion

  • Study how a series of gears in a waterwheel translates a stream's energy to a millstone
    In energy conversion: Waterwheels

    A horizontal-shaft water mill was first described by the Roman architect and engineer Vitruvius about 27 bce. It consisted of an undershot waterwheel in which water enters below the centre of the wheel and is guided by a millrace and chute. The waterwheel was coupled with…

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