  A Galilean invariant description of the retarded electric interaction of two
moving charges is carried out, considering the EM action to propagate at the
speed of light. Through the altering of the Li\'enard-Wiechert potential (LWP)
a new retarded, electric potential called retarded Coulomb potential (RCP) is
ordered to the moving charges. RCP depends on the velocities both of the
interacting charges. The force law of the electric interaction of moving
charges is determined by means of the second order approximation of RCP. The
force law obtained is the Galilean invariant Webers force law, surprisingly.
The rediscovery of the Webers force law from a retarded electric potential
confirms its significance and proves it to be an approximated law, based on
retardation. From the fact that the purely electric RCP provides not only the
electric, but even the magnetic forces, a substantial ascertainment follows: In
Galilean invariant description, magnetic phenomena are the manifestation of the
retarded electric interaction exclusively.
