The sub-divided wheel of Philon of Byzantium (variation of "polykadia"). Photo : Augusta Stylianou Artist
Popular machine for pumping water of medium differences in height that is used even today. It consisted of a large rotating radial wheel with embedded wooden containers which had and opening at the upper part for the inflow of abstractable water when they were at the lower point in their course and for the outflow of water when they were trapped at the higher point. The required energy for the movement of the wheel came from the tread of a worker on the incorporated steps in its circumference or a cooperating treadmill (foot-powered wheel)
Sources: Philon of Byzantium, Pneumatics, Vitruvius De architectura
From "Ancient Greek Technology" exhibition at the Evagoras & Kathleen Lanitis Centre in Carob Mill Limassol
Replicas and Reconstruction by Prof . Kostas Kotsanas and his students
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