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  2. 3rd century AD
    • According to 2 sources
    The earliest known mechanical mill is the Hierapolis sawmill, a Roman water-powered stone mill at Hierapolis, Asia Minor dating back to the 3rd century AD. Other water-powered mills followed and by the 11th century they were widespread in Spain and North Africa, the Middle East and Central Asia, and in the next few centuries, spread across Europe.
    During the 3rd century A.D., Romans invented one of the earliest kinds of mechanical mills. This water-powered mill was called the Hierapolis sawmill. By the 11th century, water-powered sawmills were prevalent across the Middle East and Central Asia.
     
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    In 537 AD, ship mills were ingeniously used by the East Roman general Belisarius, when the besieging Goths cut off the water supply for those mills. These floating mills had a wheel that was attached to a boat moored in a fast flowing river. See more

    A watermill or water mill is a mill that uses hydropower. It is a structure that uses a water wheel or water turbine to drive a mechanical process such as milling (grinding) See more

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    In 1870 watermills still produced 2/3 of the power available for British grain milling. By the early 20th century, availability of cheap electrical energy made the watermill obsolete in … See more

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    There are two basic types of watermills, one powered by a vertical-waterwheel via a gear mechanism, and the other equipped with a … See more

    Typically, water is diverted from a river or impoundment or mill pond to a turbine or water wheel, along a channel or pipe (variously known as a See more

    Bark mills ground bark, from oak or chestnut trees to produce a coarse powder for use in tanneries.
    Blade mills were used for sharpening … See more

     
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  5. wind·mill
    noun
    1. a building with sails or vanes that turn in the wind and generate power to grind grain into flour.
    More about windmill
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  8. Windmill | Definition, History, Types, & Facts | Britannica

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  10. Sawmill - Wikipedia

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  13. Overview of the Gristmill · George Washington's Mount Vernon

  14. History of Saw Milling – WoodchuckCanuck.com

  15. A Brief History of Sawmills — your one stop sawmill source

  16. The History of the Water Wheel - ThoughtCo

  17. Windmill - Wikipedia

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  20. Gristmill - Wikipedia