Perpetual motion: A garden fountain worked by

Perpetual motion: A garden fountain worked by water from upper cistern which is filled with water from an Archimedian screw. The screw is driven by a perpetual motion device using a wheel and lead balls. The balls are supposed to force the wheel round as they fall from the inside of the wheel to its outer circumference. Engraving from Theatrum Machinarum Novum by George Andreas Bockler (Nuremberg, 1673)

1673 Andreas Balls Bockler Circumference Cistern Driven Filled Hydraulics Hydro-dynamics Machinarum Novum Perpetual Screw Supposed Theatrum

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