The Measurement of Direct Potentials Originating in Circuits of High Resistance

Abstract

Various methods of detecting direct potentials in circuits of high resistance are discussed and appraised. A new instrument for such measurements is described and a variety of its applications indicated. With this instrument and a robust galvanometer of moderate sensitivity, it is possible to detect potentials to better than 0.1 millivolt in circuits having resistances of the order of 10¹¹ ohms.