The validity of applying Fisher's droplet picture to homogeneous nucleation theory is examined. The implica tions of recent computer simulations of droplets are also discussed. in this letter, the impinging rate for nucleation in non-ideal vapors, particularly near the critical point is estimated. Recently [ 11, we discussed the theory of homogeneous nucleation in water vapor by extrapolating Fisher's droplet picture from the critical point of the liquid-gas transition down to the triple point. In our approach, such controversial problems [2 ] as the rotational, translational, configurational, and re placement partition functions can be circumvented by fitting the parameters of the droplet free energy to the measured equation of state near the critical point. Our resulting nucleation rate is found to agree with experiments in water near the triple point [I]. However, Abraham pointed out [3] that the mean free path for single molecules near the critical point is much smaller than the (Kelvin) size of the "critical" droplets whereas at low temperatures it is much larger. Thus it is questionable whether (as we did in ref. [I] ) the same model of (non-interacting) freely moving droplets can be applied for both low temperatures (T < T,) and near the critical point (T w T,). Our main reason for.employing the picture of freely moving droplets even near T, was indirect: the resulting