《Tetrabiblos》No. IiClaudius Ptolemy（Ashmand 英譯 1822）
[287] Thus, the aggregate times of ascension, in a right sphere, of the first point of Gemini are 57° 44′; and, in the climate of Lower Ægypt, 45° 5′: the sixth part of the difference between them is 2° 6′ and a fraction, which, added to 15°, again makes the diurnal temporal hour of the first point of Gemini equal to 17° 6′ and a fraction of the equator.
段落 tetra-4-noii-7public-domain (Ashmand 1822)
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