  The action of certain static magnetic fields on charged test particles is
interpreted as a consequence of the interaction of the particles with electric
dipole distributions emitted by other charged particles in relative motion. The
dipole model of electric forces was initially conceived to emulate Coulomb's
law, but is applied here to a wide class of phenomena, such as forces between
parallel conductors, a relativistic correction of Biot--Savart's law, and the
magnetic moment of a current loop.
