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Published online by Cambridge University Press: 15 September 2014
In former papers laid before this Society, I showed that when any two metals are rubbed against each other, a current of electricity is produced; and that this current agrees in direction with the thermo-electric current for the same two metals, and is neater approximately at least, in proportion as the metals rubbed are far apart on the thermo-electric scale,—the greatest current, as far as I have yet observed, being got from antimony and bismuth.