  With appropriate gauge transformations, field can replace electric charge in
quarks. Classical quarks, in a necessary non-gauge invariant formulation, are
used for illustration, bringing to the fore the limitations of the usual
electric charge densities for single particles in Coulomb equations. The
results are encouraging; the solutions for the Coulomb potentials apply
individually to each quark in a shell structure. A remarkably simple relation
emerges between the Coulomb and weak potentials.
