同樣地，他們又說，那些與同一個回歸星座等距離的區段——無論是哪一個回歸星座——具有相等的力量。這是因為當太陽進入其中任意一個區段時，白晝與白晝相等，黑夜與黑夜相等，而它們各自的時辰長度也相同。這些區段也被說成彼此「相互觀察」（behold），既是基於上述的理由，也是因為這一對星座中的每一個，都從地平線的同一部分升起，並在地平線的同一部分落下。
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.