Lancaster, PA: The American Physical Society, 1947. Wraps. First Edition. 839-944, ix pp. 4to. Green paper wraps that are quite clean inside and out, very minor age toning to spine. Very Good.
Polykarp Kusch and Michael Foley measured the electron’s intrinsic magnetic moment for the first time in late 1946. Then, in 1947, Karp, Foley and a team of scientists from Columbia University discovered a small discrepancy (on the order of one part in 2000) between Dirac’s prediction and the actual size of the spin g-factor, implying the existence of an “anomalous magnetic moment.” Isador Rabi presented this discrepancy at the Shelter Island meeting in June 1947, and Kusch and Foley went on to confirm the g-factor discrepancy in other elements. This is the paper that first identified a possible g-factor discrepancy.