Electrical Conductivity of Metals at the Lowest Temperature*

Abstract

WITH the fairly large supplies of helium now available it is comparatively easy by the liquefaction of this gas to reach temperatures so low as 1° K. (–272° C.). At this low temperature a few of the metals become perfect conductors of electricity. Most of them, however, still exhibit, when so cooled, a decreasingly small but still quite measurable resistance to the passage of a current.