《Tetrabiblos》No. IiClaudius Ptolemy（Ashmand 英譯 1822）
_Of Circumstances regulated by Ascensions_ In any climate whatever, the magnitude of a given day or night is to be computed by the number of ascensional times proper to that particular climate.
段落 tetra-4-noii-1public-domain (Ashmand 1822)
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