Abstract
Because of its importance wherever thermodynamics is used, reference is made to the need of improved knowledge of the relation of the international scale of 1927 to the thermodynamic scale. The published results of James A. Beattie comprise comparisons between the scales from 32 F to 832.28 F and indicate that the thermodynamic-scale temperature as a maximum is 0.26 deg F greater than the international scale at about 750 F. The new thermometric information makes possible a thermodynamic consistency test of vaporization data, vapor pressures, and volume data from the steam investigation sponsored by this Society up to 1935. It is suggested that additional volume data are desirable above 860 F. Comments are offered on the known thermodynamic properties of water, ammonia, methane, ethylene, and mixtures of a number of the eleven pure gases of the list selected by the Research Committee on Properties of Gases and Gas Mixtures.
