Abstract
IN February last Mr. P. H. Hepburn directed my attention to some surprising light-bows he had observed on several occasions on the surface of one of the ponds on Hampstead Heath. On February 24 we examined them together. A footpath lighted by three electric street-lamps runs along the southern edge of the pond. As one passed along this path bright bows of strange forms cast by the lamps were seen to soring out from the edge. The night was dark, the air still and slightly foggy, and the water smooth and covered with a film of scum extending as far as we could see in the dim light. There was no frost. The bows were judged to be on the surface of the water, which was only about a foot below the level of our feet.
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BARTRUM, C. A Rainbow Inside Out. Nature 105, 388–390 (1920). https://doi.org/10.1038/105388a0
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DOI: https://doi.org/10.1038/105388a0
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