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In several previous communications I have pointed out the existence of a peculiar double acid, C14 H11 N3 O4 , formed by the action of nitrous acid onamidobenzoic acid . This acid, which I have designated as amidodiasobenzoic acid, when again submitted in the presence of hot alcohol to the action of nitrous acid, is changed according to the following equation C14 H11 N3 O4 + 2C2 H6 O + H NO2 = 2C7 H6 O2 + 2C2 H4 O + 2H2 O + 4N Double acid. Alcohol. Nitrous acid Non-nitrogenous acid Aldehyde. The non-nitrogenous acid thus reproduced exhibits the composition of benzoic acid; it differs, however, in its properties essentially from that acid. Since the publication of Kolbe and Lautemann’s experiments on salylic acid, I have found that the acid in question is identical with the latter.

VII. Reproduction of non-nitrogenous acids from amidic acids