American chemical journal . tance is insoluble incold alkalies, but on warming a solution is effected, from which theaddition of an acid precipitates the original substance. According toV. Pechmann and Duisberg, the methyl derivative, on boiling withalkalies, takes up water, passing over into the salt of an acid. Resocyanin treated with nascent hydrogen takes up this purpose it was dissolved in aqueous sodium hydrate, andtreated with sodium amalgam until a drop of the reduced liquidpoured into water failed to cause the characteristic blue fluorescenceof resocyanin. The addition of

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American chemical journal . tance is insoluble incold alkalies, but on warming a solution is effected, from which theaddition of an acid precipitates the original substance. According toV. Pechmann and Duisberg, the methyl derivative, on boiling withalkalies, takes up water, passing over into the salt of an acid. Resocyanin treated with nascent hydrogen takes up this purpose it was dissolved in aqueous sodium hydrate, andtreated with sodium amalgam until a drop of the reduced liquidpoured into water failed to cause the characteristic blue fluorescenceof resocyanin. The addition of acids to the alkaline solution gavea half-solid white precipitate, which soon solidified. For purifica-tion it was crystallised several times from dilute alcohol. gram of substance, dried at 110°, gave gram ofCO2 and gram of H^O. gram of substance, dried at 110°, gave gram ofCO. and 170 gram of HoO. Theory for Found. CioHioOa. CioHjO;,. c H 542 5-36.

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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherbalti, bookyear1879