《Tetrabiblos》No. IiClaudius Ptolemy（Ashmand 英譯 1822）
In the climate of Southern Britain, the aggregate times of ascension of the first point of Gemini are 29° 43′: the sixth part of the difference between that sum and 57° 44′ of right ascension is 4° 40′ and a fraction, which, added to 15°, makes the diurnal temporal hour of the first point of Gemini, in South Britain, equal to 19° 40′ and a fraction of the equator, as before shown.
段落 tetra-4-noii-8public-domain (Ashmand 1822)
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