  We briefly review the known properties of Melvin's magnetic universe and
study the propagation of test charged matter waves in this static spacetime.
Moreover, the possible correspondence between the wave perturbations on the
background Melvin universe and the motion of charged test particles is
discussed. Next, we explore a simple scenario for turning Melvin's static
universe into one that undergoes gravitational collapse. In the resulting
dynamic gravitational field, the formation of cosmic double-jet configurations
is emphasized.
