Synopses & Reviews
Synopsis
Excerpt from Electro-Physiology
In support of his position Galvani asserted, and apparently dem onstrated, that it was possible to excite contractions, though perhaps feeble ones, by contact of homogeneous metals; but Volta replied that, when metals were believed to be perfectly homogeneous, there were on their surfaces slight differences in temperature, hardness, polish, etc., which were sufficient to produce the electricity. Galvani then employed mercury as a metallic conductor, to which he thought the Objections Of Volta could not apply; by dipping, the limb into the mercurial trough contractions at once resulted. To this experiment Volta replied that the surface of mercury was wanting in perfect homogeneity from the contact of air and moisture, and, therefore, capable of developing electricity.
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