Abstract
Essential difficulties of the nucleation theory have been considered, especially those of calculating the number of droplets forming per unit time ν during the condensation of vapor. A more general statistical method using the Gibbs' grand ensemble as the basis has been shown in the case of moderate supersaturations to allow, in a very strict and general manner, the determination of ν, a pre‐exponential factor inclusive. For a particular case of rarefied vapor, the pre‐exponential factor coincides with that found by Frenkel.

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