Putti deprive a bird of air in a vacuum experiment, one plays at billiards, another plays with magnetised keys, while outside a storm rages: representing physics. Etching by B. Picart, 1729, after himself.

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Credit: Putti deprive a bird of air in a vacuum experiment, one plays at billiards, another plays with magnetised keys, while outside a storm rages: representing physics. Etching by B. Picart, 1729, after himself. Credit: Wellcome Collection. Attribution 4.0 International (CC BY 4.0)