《Tetrabiblos》Number Of The Modes Of ProrogationClaudius Ptolemy（Ashmand 英譯 1822）
Now, three being the half of six, and 12 being the amount of the excess, the half of 12 is therefore to be taken, giving 6 to be either added to the 58 times, or subtracted from the 70: thus, in either way, producing 64, the required number of times.
段落 tetra-3-numberofth-64public-domain (Ashmand 1822)
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