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Published online by Cambridge University Press: 15 September 2014
During the course of an investigation on the cerite metals we found that peroxide of hydrogen, added to the precipitated hydrates in presence of excess of alkali, is a very delicate test for cerium, even in presence of Lanthanum and Didymium, owing to the formation of a dark yellow or brown compound, probably a peroxide, which differs from that produced by chlorine under the similar circumstances.