Brewster, David, Sir, 1781-1868, Bache, A. D. (Alexander Dallas), 1806-1867 · Philadelphia : Lea and Blanchard · leaf 235
rpetually fluctuating.But in reality it consisted of the arches expressed in thefigure, as I accurately observed for this very purpose.* Thesearches cut each other in a point at Q, and there they formed aparhelion; the parhelia M, N shining from the common inter-sections of the inner halo, and the… … B C D E, in which there were two mock moons at B and D;one at each side of the moon, consisting of various colors, andshooting out very long and whitish beams by fits. At abouttwo oclock a larger circle surrounded the lesser, and reachedto the horizon. The tops of both these circles were touchedby…
Optics
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