Discussion For the six polar liquids so far tested, a significant discontinuity in the slope of the static dielectric constant-temperature curve has been found in the neighborhood of the melting point in each case. On the other hand, no such effect has been observed with any non-polar or slightly polar liquids, suggesting that the magnitude of the change in slope may be related-at least in a qualitative way-to the permanent dipole moment. In Table I1 are ...