Nov 1882
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1882natur..27...77a&link_type=abstract
Nature, Volume 27, Issue 682, pp. 77 (1882).
Physics
Scientific paper
HAPPENING by chance to look into ``Loomis's Meteorology,'' after reading M. Dechevren's account of the blue, white, and red bands visible before sunrise and after sunset at Zikawei, I noticed nuder the above heading the following account of shadow-bands, which not only appear to be very similar to those observed by Dechevrena, but are explained in identically the same way (``Loomis's Meteorology,'' p. 107): ``A similar phenomenon [to the water-bands described in the preceding paragraph] is frequently noticed about fifteen minutes after sunset, when the shadows of clouds near the horizon are projected upon the western sky in the form of radiant beams diverging from the sun. These beams are parallel lines of indefinite length, but from the effect of perspective they seem to diverge from the sun, and if they could be traced entirely across the sky, they would for the same reason converge to a point directly opposite to the ann. Such cases are sometimes, though not very frequently noticed. Similar shadows are sometimes seen in the morning before sunrise, and form a conspicuous feature of the morning twilight. This effect is sometimes noticed us nearly every part of the world. It must have attracted the attention of the ancient Greeks, and is thought to explain that poetic expression ``the rosyfingered dawn.''
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