On the Longitude Effect of Cosmic Radiation

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Abstract
It is shown that if the equivalent magnetic dipole describing the earth's magnetic field at large distances is placed at the magnetic center of the earth as calculated by Schmidt, the theory of the latitude and azimuthal effects developed by Lemaitre and Vallarta also accounts for the longitude effect found by Clay, van Alphen and Hooft and, independently, by Millikan and Neher. Further it is shown that if the distribution function of magnetically deflectable particles capable of reaching the earth's tropical belt is substantially an exponentially decreasing function of their energy, the theory quantitatively agrees with experiment.