  Anomalous Hall effect arising from the noncoplanar spin configuration
(chirality) is discussed as a probe of the chiral order in spin glasses. It is
shown that the Hall coefficient yields direct information about the linear and
nonlinear chiral susceptibilities of the spin sector, which has been hard to
obtain experimentally from the standard magnetic measurements. Based on the
chirality scenario of spin-glass transition, predictions are given on the
behavior of the Hall resistivity of canonical spin glasses.
