, the absolute dimensions of the model were computed. The total energy comes out less than for the Bohr model, and the ionizing potential, 25.62 volts, agrees closely with the experimental value. The magnetic moment is zero.Application of the Quantum Theory to Coupled Electrons.---The success of the semi-circular model in giving the correct value for the ionizing potential of helium suggests that in the case of coupled electrons the quantum theory should be applied not to the momentum of the individual electrons according to the relation

\ensuremath{\int}\mathrm{pdq}=\frac{h}{2\ensuremath{\pi}}

, but rather to the momentum which, by being relayed from one electron to another, passes in each direction around the nucleus.

DOI: 10.1126/science.51.1329.605

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\frac{h}{2\ensuremath{\pi}}

\ensuremath{\int}\mathrm{pdq}=\frac{h}{2\ensuremath{\pi}}

, but rather to the momentum which, by being relayed from one electron to another, passes in each direction around the nucleus.