《明史·志·卷十一》
用弦转限逐次相加，满转中限就去掉，就是各弦望及次朔的限数。
以弦转限累加之，满转中限去之，即各弦望及次朔限。
Use the string turn limit to add gradually, full turn the middle limit to remove it, that is, the limit number of each string, hope and next朔.