Abstract:Part I. A Comparison of the Methods of Determination, especially as Applied to the Mercury Cathode. By SYDNEY DUNNILL. THERE are two main difficulties which stand in the way of a quantitative theory of overvoltage. (1) Metallic surfaces cannot be reproduced exactly, and their properties change during the passage of the current. (2) There is still a considerable difference of opinion as to which of the methods of determination gives the true value, namely, the " commutator method," by which the potential of the… Show more
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