Cosmic Rays

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THE recent address by Prof. Millikan, printed in NATURE of December 5, together with the popular statements in the daily press, have directed attention once more to certain geophysical problems which have received scant attention lately from British investigators. Details of Millikan's observations on the top of Mount Whitney are still lacking, but it seems clear that another phase in the investigation may now be regarded as terminated.

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    Sitsungsber. d. Preuss. Akad. der Wiss., 34, 1923

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