The Deposition of Nickel-Cobalt Alloys

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Abstract
A record is presented on voltage readings on Weston standard cells constructed by Carhart and Hulett in 1903 and 1904. The voltage dropped slightly during the first few years of this 25‐year period, but since 1906 has remained constant. It is concluded, therefore, that cells made according to the specifications laid down 25 years ago are reproducible to at least 10 microvolts. All observations recorded indicate that there is a slow diffusion of the dissolved mercurous sulfate to the cadmium amalgam anode. Cadmium sulfate solution hydrolyzes normal mercurous sulfate. A detailed explanation is given of the changes with time taking place in the standard cells.

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