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志第十五歷九
Treatise 15: Calendar 9
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▲回回曆法三
▲ The Islamic Calendar Method, Part Three
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土星黃道南北緯度立成上橫行，以小輪心定度爲引數，起五十度，異累加三度。 累加三度。 首直行以自行定度爲引數，累加十度。 求法：簡兩引數近度，縱橫相遇度分，次各用比例法，得細率。
In the top row of the precomputed table for Saturn's ecliptic latitude north and south of the ecliptic, the argument is the degree fixed at the epicycle center, beginning at fifty degrees; each successive entry adds three degrees. Each step adds three degrees. In the first vertical column, the argument is the planet's own mean longitude, and each successive entry adds ten degrees. To calculate: take the two nearest argument values, find the degrees and minutes where the row and column intersect, then apply proportional interpolation to each in turn to obtain the refined rate.
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表格略
Tables omitted.