A general solution of the rate equations representing the degradation of chain molecules is given. The treatment may be applied to any set of equations and to any initial distribution. Model calculations are performed for random scission, Gaussian probability of scission, and scission exclusively at the mid point of the chain. The starting MWD is of the Schulz type, differing in non-uniformity. Results demonstrate that, by fitting the model parameters to experimental distributions, full kinetic infonnation on the degradation process may be obtained. -- AATA