《宋史·志·卷四》
柱星出现在外面一个月，谷物贵三倍；出现两个月、三个月，依次加倍地贵；出现在外面不满两问，预兆发大水。
柱外出一月，谷贵三倍；出二月、三月，以次倍贵；外出不尽两间，主大水。
The column star appears outside for one month, the grain is three times more expensive; appears for two months, three months, and is successively more expensive; appears outside for less than two questions, indicating a flood.