M'hen the pressure is equal to 760 iiini. the boiling point is indicated. I ani greatly indebted to Llr. Edward 0. Heuse for assistance ren-Other applications of the moving drop of mercury are being planned. dered in connect ion \vi t h this investigation.

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the formation of a substance far more soluble in ether and benzene than the original compound. Distillation of the Reduction Product with Zinc Dust.-An attempt was made to reduce the substance still further by distilling with zinc dust, this method having been used by v. Baeyer in converting oxindole into indole; as a result an oily mixture of substances was obtained from which colorless leaflets separated which were found to be carbazole. The oily substance formed a t the same time showed most intense bluered fluorescence but was present in quantities too small to admit of identification. It is proposed to examin this reaction further. DEPARTMENT O F CEEMISTRY, UNIVERSITY O F WASHINGTON.

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