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Ptolemy's Tetrabiblos

Note 278 — Chapter X · THE PERIODICAL DIVISIONS OF TIME

J. M. Ashmand translation

The Greek is simply εις τα επομενα κατα ξωδιον; but the context proves that the entire meaning must be as now given, although the Latin translation of Perugio renders it “one year to each degree.” Whalley explains that by annual periods “the author intends profections: for the taking of which, for every year from the birth, add one sign to the sign in which the aphetics are at birth, and the sign which ends at the year desired is the sign profectional for that year, and the lord of that sign is chronocrator (arbitor) for that year; so far as the degrees of that sign reach.” For example, if a prorogator at birth be in 15° of Gemini, to 15° of Cancer serves the first year; but the first six months are ruled by Mercury, and the last six by the Moon and Jupiter; and so on.

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