Abstract
The text explains that zodiac signs positioned equally from a tropical sign share equal strength, since when the sun enters these signs, the length of day and night is the same. These signs are also described as "beholding" one another because they rise and set from the same points on the horizon.
Again they say that the parts which are equally removed from the same tropical sign, whichever it may be, are of equal power, because when the sun comes into either of them the days are equal to the days, the nights to the nights, and the lengths of their own hours are the same. These also are said to “behold” One another both for the reasons stated and because each of the pair rises from the same part of the horizon and sets in the same part.