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    • Surface Radiography with Alpha Rays - Nature

      Nature· 2 days ago

      IT is well known that the short-lived atoms of radium A, B, C, and Câ² are deposited on the surfaces of objects which come in contact with radon. Three of them, namely, radium A, C and Câ², ...

    • [Letters to Editor] - Nature

      Nature· 2 days ago

      THE suggestion was not made by the reviewer, but is made in the work under review (p. 110), where it is stated that “it is most probable that in a very ancient manuscript the delta = 4 was erroneously ...