《Tetrabiblos》Number Of The Modes Of ProrogationClaudius Ptolemy（Ashmand 英譯 1822）
The number of years, depending on the distances between the prorogatory and anæretic places, cannot be always gathered simply and at once from the ascensional times[156] of each respective degree; but only in cases when the ascendant itself, or some other specific degree or body, actually ascending in the oriental horizon, may possess the prorogation.
段落 tetra-3-numberofth-22public-domain (Ashmand 1822)
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