  The analysis of a previous paper, in which it was shown that the energy for
the Aharonov-Bohm effect could be traced to the interaction energy between the
magnetic field of the electron and the background magnetic field, is extended
to cover the case in which the magnetic field of the electron is shielded from
the background magnetic field by superconducting material. The paradox that
arises from the fact that such a shielding would apparently preclude the
possibility of an interaction energy is resolved and, within the limits of the
ideal situation considered, the observed experimental result is derived.
