“…The wide variety of ternary liquid systems was demonstrated by Francis and Smith. 7 Some examples of ternary diagram experiments proposed in this Journal include the lead nitrate−sodium nitrate−water system (gravimetric analysis), 8 the water−acetic acid−1,2dichloroethane system (analysis by refractive index), 9,10 the water−acetic acid−chloroform system (analysis by NMR), 11 and the water−n-heptane−n-propanol system (analysis by gas chromatography, 12 UV or fluorescence spectroscopy, 13 or NMR 14 ). These describe, at ambient temperatures, either two solid + liquid or three liquid component systems.…”