《Tetrabiblos》The Signification Of MeteorsClaudius Ptolemy（Ashmand 英譯 1822）
All halos formed around the Moon should also be observed; for, if there appear one only, bright and clear, and decaying by degrees, it promises serene weather; but, if two or three appear, tempests are indicated: and, if they seem reddish and broken, they threaten tempests, with violent and boisterous winds; if dark and thick, they foreshow storms and snow; if black and broken, tempests with both winds and snow; and, whenever a greater number may appear, storms of greater fury are portended.
段落 tetra-2-thesignifi-6public-domain (Ashmand 1822)
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