The solubility temperatures of liquid phases were determined in ternary mixtures with a constant mass relationship of (2) and (3), respectively, 15.0:85.0, 30.0:70.0, 45.0:55.0, 60.0:40.0, 75.0:25.0, and 90.0:10.0.The composition of two coexistent liquid phases at 19 °C are also presented in graphical form.