《Tetrabiblos》No. IiClaudius Ptolemy（Ashmand 英譯 1822）
In the latitude of Southern Britain, the times of ascension between the same points as above mentioned are 236° 2′, which, divided by 15, give 15 hours 44 minutes and a fraction of equatorial time, as the length of the day of the first point of Gemini; and, if divided by 12, they produce 19° 40′ and a fraction of the equator, as the length of the diurnal temporal hour.
段落 tetra-4-noii-6public-domain (Ashmand 1822)
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