GREEK INVENTIONS: THE WATER MILL OF PHILO

 Excerpt from Wikipedia 

Earliest evidence of a water-driven wheel is probably the  Perachora Wheel (3rd century BC). An early written reference is in the technical treatises Pneumatica and Parasceuastica of the Greek engineer Philo of Byzantium.  The British historian of technology M.J.T. Lewis has shown that those portions of Philo of Byzantium's mechanical treatise which describe water wheels and which have been previously regarded as later Arabic, actually date back to the Greek 3rd-century BC original.

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