A 2D Heron's Fountain Behaves Weirdly

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Heron's Fountain is a mind bending hydrodynamic mechanism. It appears to be perpetual motion but it fact it's a really clever mix of pneumatics and hydraulics. This 2D presentation helps to explain how it works.

Image credits:

Soxhlet extractor image - Vivi! (https://commons.wikimedia.org/wiki/File:Soxhlet.JPG)
Washout toilet - Flammingo (https://commons.wikimedia.org/wiki/File:Klo_flachsp%C3%BCler_mit_altem_Sp%C3%BClkasten.JPG)
Toilet diagrams - SouthHamsian (https://en.wikipedia.org/wiki/File:Four_types_of_pedestal_WC.svg)

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Видео A 2D Heron's Fountain Behaves Weirdly канала Steve Mould