Experiments and Observations Relative to the Influence Lately Discovered by M. Galvani and Commonly Called Animal Electricity

The author reports systematic experiments probing whether the twitching seen when dissimilar metals touch animal tissues arises from ordinary electricity. He tests many metals and conditions, finding that contractions appear only with metals and usually require contact between two different metals; calcined or chemically combined metals fail; zinc is most effective, especially paired with gold, silver, or copper, while tin and lead also work. Larger metal mass and greater contact area strengthen responses. He uses the phenomenon as a sensitive indicator of residual muscle contractility, records observations carefully, and notes occasional ambiguous single-metal instances that merit further scrutiny.