  I discuss the process of magnetic field generation in rotating
superconductors in simply connected and multiply connected geometries. In
cooling a normal metal into the superconducting state while it is rotating,
electrons slow down or speed up depending on the geometry and their location in
the sample, apparently defying inertia. I argue that the conventional theory of
superconductivity does not explain these processes. Instead, the theory of hole
superconductivity does. Its predictions agree with experimental observations of
Hendricks, King and Rohrschach for solid and hollow cylinders.
