Rayons du Crépuscule


MY father tells me that he sees this phenomenon about five times in the year on the average in this climate. But the display at 4.40 this afternoon was unusually brilliant. The morning had been very wet, and when it cleared in W.N.W. at 2.30 we noticed the clear sky to be of an unusually green tint.

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LEY, A. Rayons du Crépuscule. Nature 19, 54 (1878). https://doi.org/10.1038/019054a0

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