Abstract
Rivista Scientifico-Industriale, October.—On the crepuscular phenomena of 1883–84, by Prof. Annibale Riccò. These remarks are made in connection with the author's comprehensive work, now nearly ready for the press, on the remarkable after-glows of the years 1883–84. One of the chief conclusions arrived at in this work, after a careful consideration of all the evidence, is that the volcanic theory, first advanced by Mr. Norman Lockyer, is the only one that can be now accepted. The light-effects appeared soon after the great eruption of Krakata˜o on August 27, 1883, were propagated from the neighbourhood of the volcano to the most distant parts, and then gradually died out, precisely in the same way that similar manifestations were made immediately after the eruption of the island ofFerdinandea (Julia) in 1831. It is further concluded that the after-glows were due, not to the ashes or scoriae ejected by Krakata˜o, but to the condensation of the aqueous vapours caused by the volcano, which condensation increased the quantity of solar light reflected by the atmosphere.
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Scientific Serials . Nature 37, 118 (1887). https://doi.org/10.1038/037118a0
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DOI: https://doi.org/10.1038/037118a0