Further experiments with liquid helium. L. The persistence of currents without electromotive force in supra-conducting circuits

Abstract

All the phenomena, that were dealt with in the preceding sections (J) ¹) showing the persistence of the magnetic moment of the coil, without the action of an electro-motive force, agree with what was deduced on the supposition, that a current flows through the coil of the value calculated, and which diminishes according to the time of relaxation calculated. At the same time, it was desirable to have a conclusive proof, that the magnetic moment of the coil is really caused by a current. We should then be able to prove conversely by the continuation of the moment, that the time of relaxation of the current is very long, and a value, or otherwise an upper limit could be given for the micro-residual-resistance of the conductor in which this current flows.