Equilibrium of Liquids, c1850. Hydrostatics and its applications, including a siphon (17), bellows (paradoxical instrument) (8), Bramah's hydraulic press (19), an intermittent spring, a water reservoir etc. Educational plate published in Wurtemberg, Germany, c1850. (Photo by Oxford Science Archive/Print Collector/Getty Images)
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January 27th, 2021
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