Engraving showing Sanctorio sitting in the balance that he constructed to determine the net weight change over time after the intake and excretion of food stuffs and fluids

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Engraving showing Sanctorio sitting in the balance that he constructed to determine the net weight change over time after the intake and excretion of food stuffs and fluids. Attribution 4.0 International (CC BY 4.0). Source: Wellcome Collection.