The Potentials About a Point Electrode and Apparent Resistivity Curves for a Two-, Three-, and Four-Layer EarthThe Potentials About a Point Electrode and Apparent Resistivity Curves for a Two , Three , and Four Layer Earth was first published in 1956. Minnesota Archive Editions uses digital technology to make long unavailable books once again accessible, and are published unaltered from the original University of Minnesota Press editions. This publication will be useful to geophysicists, geologists, and others engaged in exploration for minerals by electrical