《Tetrabiblos》The Number Of Prorogators, And Also The Part Of FortuneClaudius Ptolemy（Ashmand 英譯 1822）
Again, let the Sun’s oblique ascension, taken in the ascendant, be subtracted always from the oblique ascendant of the ascendant, as well in the day as in the night, and the remaining difference be added to the Moon’s right ascension; the sum will be the right ascension of the part of Fortune, which will have the Moon’s declination.” It is shown also by this dissertation, that the situation of the part of Fortune must be necessarily confined to the lunar parallels; that it can but rarely be in the ecliptic; and that its latitude is ever varying.
段落 tetra-3-thenumbero-7public-domain (Ashmand 1822)
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