《Tetrabiblos》The Zodiacal PlanisphereClaudius Ptolemy（Ashmand 英譯 1822）
In applying Ptolemy’s examples, given in Chapter XV, Book 3, to this latitude, it will follow that, when 0° ♉ may be on the ascendant, 0° ♊ will be at A, and will subsequently arrive at the ascendant at C, after the passage of 29° 43′ of the equator.
段落 tetra-4-thezodiaca-21public-domain (Ashmand 1822)
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