Abstract
IT has been suggested to me that the accompanying photographs (Fig. 1) showing the Fabry-Perot patterns of the red Balmer line for ordinary hydrogen and for a mixture containing an appreciable amount of the heavier isotope, might be of interest to readers of NATURE. They were taken by Dr. E. Gwynne Jones with the arrangement used by him and by Dr. S. Tolansky for their fine-structure researches, in order to estimate the percentage of heavy hydrogen in this mixture, which was being used by Dr. R. W. B. Pearse and me for other purposes. Originally the gas was supplied to Prof. F. Paneth by Dr. P. Harteck.
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ROBERTSON, J. Interferometer Patterns of the Hydrogen Isotopes. Nature 134, 378 (1934). https://doi.org/10.1038/134378a0
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DOI: https://doi.org/10.1038/134378a0
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