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By GEORGE YOUNG, Ph,D., and ERNEST WITHAM, B. A., B.Sc. IN the following pages, we describe two methods of preparing C-derivatives of hydroxytriazole. The first consists in oxidising a semicarbazone, when action takes place according to the general equation : 9 *NH (A.) R*CH:N*NH*CO*NH,+O = CR.N >OOH + H,O. * That containing rubidium and manganese iS, in part, isotropic.

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By GEORGE YOUNCS. IN a previous communication, in conjunction with Mr. Oates (Trans., 1901, 79, 665), I described the preparation of 3-phengl-1-methyl-5hydroxy-1 : 2 : 4-triazole, R"Meh30H, and, on heating this substance CPh-N' with phosphorus pentasulphide, a product was obtained, the empirical formula for which contained CH, less than that required for 3-phenyl-1-methyl-s-triszole. As this was in agreement with the experience of Andreocci (Atti R. Accad. Lincei, 1890, [ iv], 6, ii, 209), who rPh">C*Me, by heat-C H : N obtained 1-phenyl-3-methyl-1 : 2 : 4-triazole, ing I-phenyl-3 : 4-dimethyl-5-oxy-4 : 5-dihydro-1 : 2 : 4-triazole, with phosphorus pentasulphide, we ascribed t o our product the constitution of C-phenyl-s. triazole, fl-NH>CH.This view of the CPh*N