The Dielectric Constant of Liquids under High Pressure

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Abstract
Values of the dielectric constant have been determined for ten liquids at two temperatures and at pressures up to 12,000 atm. except in those cases where freezing would occur at lower pressures. For chloro- and bromobenzene, eugenol, hexyl, isobutyl, and ethyl alcohol, and glycerin, the reciprocal of the Clausius-Mosotti function varies linearly with the density. Carbon disulphide, pentane, and ethyl ether, behave in a somewhat more complicated manner. The linear relations can be explained by variations of the constant of the inner field, the polarizability, or both. A theoretical discussion is given. Anomalous dispersion at 247,000 cycles was observed for eugenol, isobutyl alcohol, and glycerin.