C. G. DARWIN.—(1) On the magnetic moment of o the electron. Starting from the wave equations for an electron and the associated electric density and current, it is shown how the electromagnetic fields of a moving electron can be attributed partly to the convection of electricity and partly to an intrinsic magnetisation. A geometrical construction shows the relation between the wave constants and the magnetisation. The formulae,firstworked out for slowmotion, are easily generalised by relativity for high speeds, and in this case there are electric as well as magnetic moments, and various invariant properties are given.
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Properties of Electrons1. Nature 122, 980 (1928). https://doi.org/10.1038/122980a0