《晋书·志·第七章》
求弦、望时所在宿度：在上月合朔的基础上度加七，大分加二百二十五，小分加十七点五，大分、小分及度之间的换算，宿度的确定方法如前，则可得上弦时所在宿度。
求弦望日所在度，加合朔度七，分二百二十五，小分十七半，大小分及度命如前，则上弦日所在度。
Finding out the lunar lodge where the moon is located during its first quarter and full moon: add seven to the previous synodic conjunction degree, two hundred and twenty-five to the large fraction, and seventeen point five to the small fraction. The conversion between the large and small fractions and the degree, and the method used to determine the lunar lodge are the same as those mentioned above. Then we can obtain the lunar lodge where the moon is located during its first quarter.