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The Nuttall Encyclopedia
The mere contact with two dissimilar metals, the science of what is now called Voltaic or current electricity, produced, as in the above instance, from the contact of dissimilar metals, especially that of acids on metals.
Wood, James, ed. Entry for 'Galvanism'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/g/galvanism.html. Frederick Warne & Co Ltd. London. 1900.