  An arrangement of mesoscopic experiments is considered when the conductance
of a mesoscopic normal metal sample is governed not only by the magnetic flux
threading the sample but by the supercurrent inside the superconductor coupled
to the normal metal sample as well. The conductance of the system is shown to
be associated with the SNS Josephson current $j_J$ through the normal part of
the system. By way of example we consider a model when quasi1D wire is
connected to a superconductor by its ends and coupled to two reservoirs of
electrons by the normal metallic leads. The conductance oscillations caused by
change of magnetic field and the supercurrent inside the superconductor have
been calculated. The possibility of direct observation of the Josephson current
through measurement of the thermal noise in the normal conductor is suggested.
