The theory proposed in the previous paper was examined in a quantitative manner, which was based on the assumption that initial transient crystals with nonintegral folding (NIF) chain lengths deposited immediately transform into once folded crystals (F1C) or extended chain crystals (ECC) via sliding diffusion mechanism within the NIF crystals. A simple theory on thickening and thinning gave a result that the ratio, of the activation energy for the sliding diffusion for the thickening E_d1, to that for the thinning E_d2, should be less than two. The experimental data showed a rough agreement with this prediction, except the case of poly(ethylene glycol) (PEG) with M_n=4,250. It was predicted, by assuming the transformation from F1C to ECC respectively. Finally, the results of Cheng et al. on PEG with M_n=4,250, which showed a nearly constant crystallinity over a wide rage of isothermal crystallization temperatures, were discussed in terms of the thinning and thickening of the N1F crystals.