The recently proposed asymmetry model for the highly viscous flow suggests the equality of the dielectric spectrum with the retardation part of the shear spectrum. The equality was checked using literature data, taken under carefully controlled conditions to ensure the same samples and the same temperature control in both measurements. The relation is valid in two substances at all measured temperatures. In two other substances, one can argue that there are good reasons for the deviations that one finds.

• Received 26 August 2010

DOI:https://doi.org/10.1103/PhysRevB.83.052201