  We examine the mechanism for generating a mass for a U(1) vector field
introduced by Stueckelberg. First, it is shown that renormalization of the
vector mass is identical to the renormalization of the vector field on account
of gauge invariance. We then consider how the vector mass affects the effective
potential in scalar quantum electrodynamics at one-loop order. The possibility
of extending this mechanism to couple, in a gauge invariant way, a charged
vector field to the photon is discussed.
