We propose a method for the determination of magnetic currents in non-
Abelian gauge theories which does not need a projection to Abelian deg
rees of freedom, With this definition we are able to determine the dis
tribution of magnetic currents and electric fields for the gluonic flu
x tube between a pair of static charges. Further we check the validity
of the Gauss law and the dual London equation in a gauge-invariant fo
rmulation. (C) 1997 Elsevier Science B.V.