Iridescent Clouds


A BRILLIANT iridescent zenith arc was seen to-day at 3.15 to 3.30 p.m., without either the primary or secondary solar halos which usually accompany it. A faint “mock sun” was, however, observed in the west at 4 p.m.

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LOVEL, J. Iridescent Clouds. Nature 43, 464 (1891).

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