  The extraordinary Hall effect coefficients $R_s(T)$ of the canonical spin
glass alloys ${\bf Au}Fe 8 at%$ and ${\bf Au}Mn 8 at%$ and of an archetype
reentrant system ${\bf Au}Fe 18 at%$ were measured as functions of temperature.
The data show a critical cusp-like term superimposed on a smooth background for
the spin glasses, and change of sign with temperature for the reentrant. The
results can be interpreted consistently by invoking a chiral Hall effect
contribution as proposed by Kawamura.
