  A resonance model for two-pion production in the pion-nucleon reaction is
developed that includes information obtained in the analysis of pion-nucleon
scattering in a meson-exchange model. The baryonic resonances Delta(1232),
N*(1440), N*(1520), N*(1535), and N*(1650) are included. The model reproduces
the total cross sections up to kinetic energies of the incident pion of 350 MeV
and obtains the shapes of the differential cross sections in reasonable
agreement with the data.
