Abstract
IN a letter published in NATURE of Aug. 18 under the above title, I described the excitation of mercury fluorescence using wave-lengths much longer than the resonance line λ2537, and even as long as λ3125. This fluorescence shows the well-known visual green with continuous spectrum. I have since found by photography that, at any rate when the vapour is dense, the spectrum shows, besides the visual maximum, the well-known broad maximum at about λ3300 in the ultra-violet. In this experiment excitation was by the iron arc, filtered by a bromine cell combined with vita glass, and the effective exciting wave-length is somewhere about λ3000.
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RAYLEIGH Fluorescence of Mercury Vapour under Low Excitation. Nature 122, 725 (1928). https://doi.org/10.1038/122725a0
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DOI: https://doi.org/10.1038/122725a0
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