The electronic transport processes in metallic superlattices are studied by solving Boltzmann's equation with inclusion of a temperature gradient as well as an external magnetic field and by adopting the treatment of interface scattering processes in our revious interpretation of electric conduction characteristics. Variations with modulation wavelength of the thermoelectric power, the electronic thermal conductivity, the Thomson and Hall coefficients are derived for Nb/Ti superlattices. Further experimental investigations on the transport properties of metallic superlattices are expected to help the understanding of the electronic processes in such artificial materials.