The spectrum for the distribution of the relaxation times that leads to the universally observed Kohlraush law, or stretched exponential relaxation exp(-(t/tau(0))(alpha)) (0 < alpha < 1), for the time correlation function in glassy systems, is calculated. For alpha = 1/2, we obtain explicitly the distribution of the relaxation spectrum. For general values of ct, all the moments of the distribution are computed explicitly. We find that for alpha < 1 the distribution has a broad spectrum with the width of the distribution and the average relaxation time diverges over tens of orders of magnitude as alpha becomes close to 0. The plausible connections with the Vogel-Fulcher and Arrhenius laws are also discussed.
