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The benzene and acetic acid liquid system has been the subject of several investigations with conflicting results concerning the possibility of it belonging to a system having a maximum vapor pressure. Golodetz1 described the separation of toluene from acetic acid by adding benzene, which formed an azeotropic mixture with the acetic acid. Lécat2 reported a minimum boiling point of 80.05°for 97.5 mole per cent, benzene.Schmidt3 applied the static method in a study of this system and reported a definite maximum vapor pressure at about 80 mole per cent, of benzene. On the other hand, the results recorded by the following investigators seem to indicate that this system belongs to a normal class of binary liquid mixtures having the usual deviations expected when structurally different substances are used. Linebarger4 used the air saturation method and Rosanoff and Easley5 a vapor bubbling method. Zawidski6 and also Othmer7 used the ordinary distillation method.A preliminary investigation of this system was conducted by one of us8 using the static method.

Notice to Readers.-For the convenience of those who may wish to cut out the corrections and attach them to margins of the articles corrected, they have been printed upon one side of the page only. 1921, \rOL. 43

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