Fig. 1: Luigi Galvani’s experimental frog
"Convulsions were produced in the dead bodies of frogs, apparently without the intervention of any external electrical agent; for this effect took place when the lumbar nerves having been laid bare, and connected together by a hook of copper, were suspended by this hook to a balcony of iron, with the rails of which the muscles of the thighs came in contact by their own weight, fig. 1” (p. 428).
