CLAUDIUS PTOLEMY:

TETRABIBLOS

OR THE QUADRIPARTITE MATHEMATICAL TREATISE


22. 0f Places and Degrees.

Some have made even finer divisions of rulership than these, using the terms" places" and" degrees." Defining "place" as the twelfth part of a sign, or 2 1/2°, they assign the domination over them to the signs in order. Others follow other illogical orders; and again they assign each "degree" from the beginning to each of the planets of each sign in accordance with the Chaldaean order of terms. These matters, as they have only plausible and not natural, but, rather, unfounded, arguments in their favour, we shall omit. The following, however, upon which it is worth while to dwell, we shall not pass by, namely, that it is reasonable to reckon the beginnings of the signs also from the equinoxes and solstices, partly because the writers make this quite clear, and particularly because from our previous demonstrations we observe that their natures, powers, and familiarities take their cause from the solstitial and equinoctial starting-places, and from no other source. For if other starting-places are assumed, we shall either be compelled no longer to use the natures of the signs for prognostications or, if we use them, to be in error, since the spaces of the zodiac which implant their powers in the planets would then pass over to others and become alienated.




Ptolemy's Tetrabiblos

Main Library