The drift velocity of electrons in an electric field in argon and alcohol mixtures has been measured. The measurement has been taken observing on the screen of a triggered sweep oscillograph the rise time of pulses as given by &agr;‐particles in an ionization chamber. The results give, for the 10 percent mixture, a behavior of thew(E/p) function, of thew=aE/ptype up toE/p=2 v cm−1mm Hg−1values, and of thew=const type for larger values ofE/p. Measurements at 0.5 and 5 percent alcohol concentrations are also reported.