I. The minimum-point of change of potential of a voltaic couple

Abstract

In a previous communication on “ The Effect of Chlorine on the Electromotive Force of a Voltaic Couple ” (‘ Roy. Soc. Proc.,’ May 3rd, 1888), I described a phenomenon which I now venture to term the “Minimum-point of Change of Potential of a Voltaic Couple.” In that description a “ thermo-electric pile ” is mentioned as having been used for the purpose of balancing the electromotive force of the couple, whilst finding the “ minimum-point of change.”