CLAUDIUS PTOLEMY:

TETRABIBLOS

OR THE QUADRIPARTITE MATHEMATICAL TREATISE

11. Of the Nature of the Signs, Part by Part, and their Effect upon the Weather.

Now the sign of Aries as a whole, because it marks the equinox, is characterized by thunder or hail, but, taken part by part, through the variation in degree that is due to the special quality of the fixed stars, its leading portion is rainy and windy, its middle temperate, and the following part hot and pestilential. Its northern parts are hot and destructive, its southern frosty and chilly.
The sign of Taurus as a whole is indicative of both temperatures and is somewhat hot; but taken part by part, its leading portion, particularly near the Pleiades, is marked by earthquakes, winds, and mists; its middle moist and cola, and its following portion, near the Hyades, fiery and productive of thunder and lightning. Its northern parts are temperate, its southern unstable and irregular.
The sign of Gemini as a whole is productive of an equable temperature, but taken part by part its leading portion is wet and destructive, its middle temperate, and its following portion mixed and irregular. Its northern parts are windy and cause earthquakes; its southern parts dry and parching.
The sign of Cancer as a whole is one of fair, warm weather; but, part by part, its leading portion and the region of Praesepe is stifling, productive of earthquakes, and misty; its middle temperate, and its, following parts windy. Its northern and southern parts are fiery and parching.
The sign of Leo as a whole is hot and stifling; but, part by part, its leading portion is stifling and pestilential, its middle part temperate, and its following portion wet and destructive. Its northern parts are unstable and fiery, its southern parts moist.
The sign of Virgo as a whole is moist and marked by thunder-storms; but, taken part by part, its leading portion is rather warm and destructive, its middle temperate, and its following part watery. Its northern parts are windy and its southern parts temperate.
The sign of Libra as a whole is changeable and variable; but, taken part by part, its leading and middle portions are temperate and its following portion watery. Its northern parts are windy and its southern moist and pestilential.
The sign of Scorpio as a whole is marked by thunder and fire, but, taken part by part, its leading portion is snowy, its middle temperate, and its following portion causes earthquakes. Its northern parts are hot and its southern moist.
The sign of Sagittarius as a whole is windy; but, taken part by part, its leading portion is wet, its middle temperate, and its following part fiery. Its northern parts are windy, its southern moist and changeable.
The sign of Capricorn as a whole is moist; but, taken part by part, its leading portion is marked by hot weather and is destructive, its middle temperate, and its following part raises rain-storms. Its northern and southern portions are wet and destructive.
The sign of Aquarius as a whole is cold and watery ; but, taken part by part, its leading portion is moist, its middle temperate, its following part windy. Its northern portion brings hot weather and its southern clouds.
The sign of Pisces as a whole is cold and windy ; but, taken part by part, its leading portion is temperate, its middle moist, and its following portion hot. Its northern parts are windy and its southern watery.




Ptolemy's Tetrabiblos

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