IT may be remarked that I showed long ago that the ionisation associated with the decay of active nitrogen was dependent on the gases mixed with it (Proc. Roy. Soc., vol. 86, pp. 60, 61, 184, 1911–12). In particular, sodium vapour greatly increased the effect obtained with nitrogen alone, and oxygen or nitric oxide greatly diminished it. Mercury had little effect, as in the experience of Mr. Constantinides. The views expressed by him scarcely seem adequate to cover all the above facts. But the subject is doubtless well worth pursuing, with the much greater theoretical illumination of the present time.
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RAYLEIGH Ionisation Phenomena in Active Nitrogen. Nature 119, 163 (1927). https://doi.org/10.1038/119163c0
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