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Ptolemy's Tetrabiblos

Chapter 37: CHAPTER VI THE REGIONS OR COUNTRIES TO BE CONSIDERED AS LIABLE TO BE COMPREHENDED IN THE EVENT
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About This Book

A systematic astrological treatise that explains how the sun, moon, planets and fixed stars are understood to affect weather, geography and human affairs. It lays out technical vocabulary and procedures—signs, houses, aspects, triplicities, exaltations and terms—then applies them across four parts: foundational principles and methods; climatic and regional forecasts including eclipses and atmospheric phenomena; rules for casting nativities and interpreting birth, temperament, health and longevity; and worked examples with tables and commentary. The work emphasizes a disciplined, observational approach to linking astronomical positions with types and timings of terrestrial events.

CHAPTER VI
THE REGIONS OR COUNTRIES TO BE CONSIDERED
AS LIABLE TO BE COMPREHENDED IN THE EVENT

The first of the several branches of consideration just enumerated relates to locality, and is to be exercised in the following manner:—

In all eclipses of the Sun and Moon, and especially in such as are fully visible, the place in the zodiac, where the eclipse happens, is to be noted; and it must be seen what countries are in familiarity with that place, according to the rules laid down regarding the quadrants and the triplicities; and in like manner it must be observed what cities are under the influence of the sign in which the eclipse happens; either by means of the ascendant, and the situations of the luminaries at the time of their foundation, or by means of the mid-heaven of their kings or governors, actually ruling at the time of the eclipse; although such time may be subsequent to the building of the said cities. Whatever countries or cities shall be thus found in familiarity with the ecliptical place, will all be comprehended in the event; which will, however, principally attach to all those parts which may be connected with the identical sign of the eclipse,[83] and in which it was visible while above the earth.[84]