97-05U

The thermodynamic function such as magnetic susceptibility, heat capacity and entropy of regular spin net in Ising model $S=1$ for knot subsystem in mean field approximation are investigated. Their behaviour in the low and higt temperatures vicinity has been studied. The dependence of various components of thermodynamic functions upon the total number of particles in the systems is examined. The dependence of some important parametres in the criticel point on the number of spins in the link is examined and the in comparison with results for the lattice is conducted.