Galvani seems to have concerned himself principally with the

physiological processes which he believed gave rise to the
electric charges, but physicists began immediately to seek for
other sources of the electricity
Galvani seems to have concerned himself principally with the
physiological processes which he believed gave rise to the
electric charges, but physicists began immediately to seek for
other sources of the electricity. The one observation which
seemed to offer a definite suggestion as to the possible source
of the electrical charge was the fact that, in general two
different metals must be used to connect the muscle and nerve
before a discharge would take place from the one to the other.
This made Galvani"s theory that the metals served merely as
conductors seem improbable. On the other hand, it was sometimes
possible to get the muscular contractions by using a single
bent wire or rod to connect the nerve and muscle, especially if
the two ends were of different degrees of polish, or if one end
was warmer than the other.


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