  A non-local gauge symmetry of a complex scalar field, which can be trivially
extended to spinor fields, was demonstrated in a recent paper (Mod.Phys.Lett.
A13, 1265 (1998) ; hep-th/9902020). The corresponding covariant Lagrangian
density yielded a new, non-local Quantum Electrodynamics. In this letter we
show that as a consequence of this new QED, a blackbody radiation viewed
through gaseous matter appears to show a slight deviation from the Planck
formula, and propose an experimental test to check this effect. We also show
that a non-uniformity in this gaseous matter distribution leads to an
(apparent) spatial anisotropy in the blackbody radiation.
