Abstract
LONDON. Physical Society, May 10.—Captain W. de W. Abney, President, in the chair.—Mr. Herroun read a paper on the iodine voltameter. After referring to the usual methods of determining the value of the small currents used in calibrating galvanometers and other apparatus for measuring small currents, and discussing the errors to which they are subject, the author gave his reasons for selecting iodine. He did this since, with the exception of mercury in the mercurous state, iodine has the largest electro-chemical equivalent, and in addition, by titration with sodium thiosulphate, it is possible to determine the quantity of iodine liberated with a greater accuracy than can be obtained by weighing a deposit of copper or silver with the balance. The solution employed in the voltameter contains 10 to 15 per cent, of zinc iodide.
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Societies and Academies. Nature 52, 119–120 (1895). https://doi.org/10.1038/052119a0
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DOI: https://doi.org/10.1038/052119a0