  It is suggested that virtual gluon-clusters exist in nucleon, and that such
colorless and colored objects manifest themselves in the small $x_B$ region of
inelastic lepton-nucleon scattering processes. The relationship between the
space-time properties of such clusters and the striking features observed in
these scattering processes is discussed. A phase-space model is used to show
how quantitative results can be obtained in such an approach. The results of
this model-calculation are in reasonable agreement with the existing data.
Further experiments are suggested.
