  A system with a metastable phase and a pseudo continuous set of the
heterogeneous centers is considered. An analytical theory for kinetics of the
process of condensation in such a system is constructed. The free energy of
formation of the critical embryo is assumed to be known in the capillary
(macroscopic) approach as well as the solvatation energy of the embryo. The
theory is based on the quasistationary approximation for the nucleation rate
which has been justified analytically. An effective iteration procedure is
presented. The iterations are calculated analytically. The approximate
universal form of the spectrum is established.
