Abstract
A KNOWLEDGE of this constant is essential to the estimation of the ages of minerals from their helium content. In a paper published in Proc. Roy. Soc., July 28, 1908, I gave the ages of some minerals provisionally on the assumption that the rate was 9.13 × 10-8 c.c. per gram U3O8 per annum. This rate was calculated from Rutherford's indirect data. It has received much support from Sir J. Dewar's determination of the rate of production by radium with its immediate products. I am now in a position to confirm it further by an experiment on the rate of growth of helium in a solution of pitchblende; I speak of a solution, but it has been found impracticable to take up all the constituents by one solvent. Two solutions were necessary.
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STRUTT, R. Rate of Helium Production from the Complete Series of Uranium Products. Nature 81, 158 (1909). https://doi.org/10.1038/081158c0
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DOI: https://doi.org/10.1038/081158c0
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