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Published online by Cambridge University Press: 15 September 2014
From a peculiar change of colour observed in the electrolysis of a solution of copper-cobalt potassium sulphate, the author was recently induced to make some experiments on the behaviour of cobalt sulphate solution when electrolysed in such a manner that the reducing product of the decomposition could not act on the solution. For this purpose a divided cell was used, so that the two electrodes were practically in separate vessels. The apparatus will be fully described in a future communication.