《Tetrabiblos》Number Of The Modes Of ProrogationClaudius Ptolemy（Ashmand 英譯 1822）
[183] That is to say, at the time of the 1st point of Aries transiting the cusp of each angle respectively. If, however, the preceding place should be distant from either angle two temporal hours, which are the third part of 6, then, in that case, the third part of 12, the amount of the excess, must be taken, viz.
段落 tetra-3-numberofth-66public-domain (Ashmand 1822)
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