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The heliomagnetic field has a considerable influence on the intensities of cosmic rays as measured upon the earth in high magnetic latitudes and elevations. The difference of intensities (integrated over the whole atmosphere) between Omaha and Saskatoon is decreased by it to the extent of about 50 percent. Diurnal and annual variations of the solar effect are calculated. They lie below or just on the verge of the present experimental error.
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Paul S. Epstein (1938) studied this question.
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