Engraving from Luigi Galvani, De Viribus Electricitatis in Motu Musculari (1791)

On the table left is an electrostatic machine; on the right, a Leyden Jar, which holds an electric charge. Galvani (1737-98) discovered animal electricity by accident in 1771, when he found that an electrical charge could make a dead frog’s leg kick.

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