Comment on ‘‘Light-scattering investigation of α and β relaxation near the liquid-glass transition of the molecular glass Salol’’

Cummins and collaborators [Phys. Rev. A 46, 3343 (1992)] have interpreted their recent dynamic light-scattering data on supercooled liquid Salol in terms of mode-coupling theory. They asserted that critical slowing down occurs at a temperature ${\mathit{T}}_{\mathit{c}}$ which is much above ${\mathit{T}}_0$ where extrapolated relaxation times in the liquid diverge and above ${\mathit{T}}_{\mathit{g}}$ where the liquid falls out of equilibrium and forms a glass. We argue that this interpretation is incompatible with dielectric susceptibility data on the same material.