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Chem. News, xxiv, xxv, 25) has investigatcd two of the best known methods for this purpose, vie., the " chloride of lime " and the " perrnanganate " processes. The results of the former are apt to be vitiated to some extent by loss of chlorine, t o guard against which, the author proceeds as follows : Into a stoppered bottle having a capacity of 1750 cub. cent., he introduces a litre of water, and then 10 cub. cent. ot' a chloride of lime solution containingdoi:10.1039/js8722500173 fatcat:nyt4ltnh3zeuno7lfuf3d6mtgu