In a recent paper, Crompton, Elford, and Robertson (1970; hereafter referred to as CER) considered certain questions concerning the steady-state distribution of electrons moving in a neutral gas under the influence of a uniform electric field E. The present communication comments on some aspects of the error discussion in the Appendix of the paper by CER. The analysis will be restricted to the case of isotropic scattering. Two different definitions of the drift velocity are considered by CER, namely( 1) andwhere f (v) is the conventional distribution function, g( v) is the distribution function immediately after collision, andare "path integral" expectation values. In equations (3) and (4) a = -I e/me 1 E, (v)/T -f(V)/T(V).