THERMODYNAMICS OF THE LIQUID-LIQUID CRITICAL MIXING REGION.

An improvement was made upon the apparatus used for heat capacity measurements and the measurements were refined to the extent that they can now reasonably be expected to give data of the high order of precision required for crucial tests of theories. The bulk of the report is devoted to a description of the apparatus developed, the art involved in its operation, and the results obtained on two particular critical systems. An attempt was made to measure the partial vapor pressure and hence the fugacity of components in a liquid-liquid near-critical mixture as a function of composition.