Abstract
ON Sunday, July 15, as a heavy thunderstorm was passing away from over this place, a brilliant rainbow appeared a little to the south of east about 5.45 p.m. There was a complete primary arch and a nearly perfect secondary one, and on being led to examine the former in consequence of its appearing unusually broad, it appeared to be made up of three bows, one directly below the other. The red of the spectrum being repeated three times was what drew my attention to this point. The two lower bows appeared smaller than the top primary arch. Thinking I must be suffering from some optical illusion, I got my wife, brother, and my little girl of nine, all to look carefully at the rainbow, and found that they all saw three distinct bows in the primary arch, in addition to the secondary arch. Is not this an unu ual occurrence?
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R. Treble Primary Rainbow. Nature 28, 344 (1883). https://doi.org/10.1038/028344d0
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DOI: https://doi.org/10.1038/028344d0
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