Computer Science
Scientific paper
Apr 1886
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1886natur..33..533t&link_type=abstract
Nature, Volume 33, Issue 858, pp. 533 (1886).
Computer Science
Scientific paper
THE critique on Dr. Riggenbach's pamphlet on the Krakatão dust-glows alludes to the peculiar ring since seen surrounding the sun, and known as ``Bishop's Ring,'' as though it had ceased to be visible last year. But the peculiar pink-tinged area surrounding the sun has been constantly seen since then, though perhaps without so definite a succession of tints as to deserve the title of ``halo.'' On almost any day when the sun is hidden by a dense cloud so that the direct light is greatly subdued, there will appear, surrounding the cloud, an area at first intensely white, and then passing into a definite pink tinge. I saw this phenomenon very markedly this afternoon at 5.10 p.m., when walking across the fields from Swinggate, a hamlet between here and Dover, towards the Cornhill Coastguard Station. I have always observed it better when there is a strong southwest wind blowing. Does this mean that the great mass of the dust-particles is still in equatorial regions? Though the phenomenon to which I allude is undoubtedly best seen when the sky has that gray tinge which accompanies a saturated or super-saturated condition, I can hardly think it due to moisture. I did not observe it till after the Krakatão eruption, and I have observed it constantly since that outbreak. Perhaps condensation of moisture in the upper aërial regions may result in the formation of minute particles of water to which the dust-particles become attached, and thus both water and dust may be concerned in the production of the pink-tinged area.
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