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Frog's-leg galvanoscope. The frog galvanoscope was a sensitive electrical instrument used to detect voltage [1] in the late 18th and 19th centuries. It consists of a skinned frog's leg with electrical connections to a nerve. The instrument was invented by Luigi Galvani and improved by Carlo Matteucci.
André-Marie Ampère, who gave mathematical expression to Ørsted's discovery, named the instrument after [1] the Italian electricity researcher Luigi Galvani, who in 1791 discovered the principle of the frog galvanoscope – that electric current would make the legs of a dead frog jerk.
A frog galvanoscope connected between the ox's tongue and ear showed a reaction when the circuit was completed through the experimenter's own body. A greater reaction was obtained when Aldini joined two or three heads together into a battery. Later, in the 1840s, Matteucci also created eel batteries, pigeon batteries and rabbit batteries.
Galvanism: electrodes touch a frog, and the legs twitch into the upward position [1]. Galvanism is a term invented by the late 18th-century physicist and chemist Alessandro Volta to refer to the generation of electric current by chemical action. [2]
Experiment De viribus electricitatis in motu musculari Late 1780s diagram of Galvani's experiment on frog legs. Luigi Galvani was born to Domenico Galvani and Barbara Caterina Foschi, in Bologna, then part of the Papal States. [6] The house in which he was born may still be seen on Via Marconi, 25, in the center of Bologna. [7]
A supply of frogs was usually on hand, as they were used in the frog galvanoscope. The electromagnetic galvanometer was available at the time, but frogs' legs were still used by Bird because of their much greater sensitivity to small currents.
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That's a rather unhelpful response (and utterly confusing to those who have not come across your brand of sarcasm before). The article already (in the lead) mentions Galvani and the frog galvanoscope. There is a discussion in that article of the Volta/Galvani dispute, and that might be a better place to link to galvanism.