  A system of a metastable phase with a pseudo continuous set of the
heterogeneous centers is considered. An analytical theory for kinetics of decay
of the metastable phase in such a system is constructed. The free energy of
formation of a critical embryo is assumed to be known in the macroscopic
approach as well as the solvatation energy. The theory constructed below is
based on the quasistationary approximation for the nucleation rate.
