《Tetrabiblos》Number Of The Modes Of ProrogationClaudius Ptolemy（Ashmand 英譯 1822）
In conformity with the foregoing remarks, when it may happen that the prorogatory and preceding place may be actually on the oriental horizon, it will be proper to reckon, at once, the ascensional times which may intervene until the meeting of the degrees; because, after the same number of equatorial times, the anæreta will arrive at the prorogatory place; that is to say, at the oriental horizon.
段落 tetra-3-numberofth-24public-domain (Ashmand 1822)
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