Wilson ratio for kondo lattices.

This is a comment on a paper by Z. Zou and P.W. Anderson. Zou and Anderson's (ZA) remark that "in the presence of spin- orbit coupling, only one selected linear combination of six local f states can hybridize with a conduction state of a given k above ~ and spin" is unexceptionable. However, their calculation of the magnetic susceptibility using such properly hybridized states runs into both experimental and theoretical problems.