The Maxwell "displacement current" and the Lorentz "magnetization current" are important in the history of classical electromagnetism, but neither is a current. The popular belief that the former acts as a current is unfortunate since it hides the fact that there is a dual to the Faraday law, namely that a time-varying electric field is accompanied by a magnetic field. The recognition of this as a fundamental law of nature provides a solid foundation for Maxwell's electromagnetic equations.

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... rding to Lorentz, the magnetization current is an average of the motions of electric charges in the atoms of a magnetized material. It is shown here that he was mistaken and that the error has gone undetected for over a century. As a result, the deduction that B and not H is the fundamental magnetic field vector is not substantiated.