Abstract
Faraday Society, March 30.—A new electrical hardening furnace: E. Sabersky and E. Adler. The furnace consists of a fireclay crucible containing a bath of metallic salts. By means of an electric current these salts are melted and kept at any desired temperature up to 1400° C. An alternating current of a voltage not exceeding 70 is employed. The process consists in heating the steel to a temperature above the transition line and then rapidly cooling it down. The cost of operating this electrical furnace is lower than that of gas-fired muffle or bath furnaces.—The relation between composition and conductivity in solutions of meta- and ortho-phosphoric acids: Dr. E. B. R. Prideaux. The results of simultaneous determinations of amounts of HPO3 and H3PO4 and of the electrical conductivity show that the conductivity of the changing solution decreases at first slowly and then more rapidly, and then more slowly again.—The electro-analysis of mercury compounds with a gold kathode: Dr. F. Mollwo Perkin. The results obtained were always slightly too high, from 0.5 per cent, to 1 per cent. This was at first attributed to occluded hydrogen, but this was finally not considered to be the cause, and no good explanation could be found. With silver kathodes similar results were obtained. Two new quartz vessels for depositing mercury on a mercury kathode were also described. It is considered that for mercury determinations a mercury kathode with rotating anode should be employed.
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Societies and Academies . Nature 80, 209–210 (1909). https://doi.org/10.1038/080209a0
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DOI: https://doi.org/10.1038/080209a0