Calculations and experimental results both indicated that effects of a molecular weight distribution of network chains may become evident in swelling pressure curves under favorable circumstances. More precise experiments are required to establish this definitely. The calculations assume that a simple integration such as is used for a continuous medium may be applied to molecular units of structure deduced from the kinetic theory of rubber elasticity. The validity of this can only be determined by further comparisons with experience. Refinement of the theory might take into account interactions of the units.