DETERMINATION OF THE fundamental law of force between two nucleons has occupied many physicists for the past three decades. Because the proton and electron have obvious similarities (elementarily, spin of 1/2, equal-but opposite electric charge, Fermi statistics, antiparticles) the derivation of a nuclear “Coulomb's law” would seem to be a just reward for working in this area. As we have rather slowly and laboriously learned, however, simplicity appears to be inversely proportional to some power of the coupling constant.