  In an earlier paper it was demonstrated that the hypothesized electrostatic
version of the Aharonov-Bohm ("AB") effect does not exist. The conclusion
follows straightforwardly once one recognizes that interference takes place in
the configuration space of the entire system, including the experimental
apparatus, and the wavefunction of the apparatus cannot be ignored. Two
additional results are presented here. 1. Observations of interference that had
been attributed to an analogue of the electrostatic AB effect (or "scalar
effect") are actually due to a magnetic AB effect. 2. In the original magnetic
AB effect itself, there is no phase shift if it is possible effectively to
shield the solenoid from the influence of the passing electron. This result is
not in conflict with the landmark experiments of Tonomura and colleagues if
Wang's recent claim is correct, that superconductive shielding could not have
isolated the toroidal magnet from the magnetic pulse of the passing electron.
