Abstract
Inoue's turbulon theory is modified by taking into account the age of turbulons and his functional form for Lagrangian correlation function is corrected to coincide with Grant's result.
A turbulon theory of the relative diffusion of moving origin type is constructed by introducing a plausible assumption that the turbulons can be effectively separated into two groups viz, that of smaller turbulons contributing only to the diffusion and that of larger turbulons contributing only to the displacement of the center of cluster, and the same results as those predicted by Batchelor's similarity theory are obtained.
