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    Article

    How old is the Cambrian System?

    PROF. C. F. DAVIDSON has presented no new evidence free from unambiguous interpretation which would refute our proposed extension of the Holmes B time-scale; or indeed on which an alternative scale could be based...

    K. I. MAYNE, R. ST. J. LAMBERT, D. YORK in Nature (1959)

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    Article

    Production by Cosmic Rays of Helium-3 in Meteorites

    THE helium content of iron meteorites varies from less than 10−9 c.c. to 4 × 10−5 c.c. per gm.1. Since their uranium and thorium content is fairly constant, this variation was considered as an indication of their...

    F. A. PANETH, P. REASBECK, K. I. MAYNE in Nature (1953)