《明史》志第十五 历九|正史

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《明史》志第十五 历九|正史

《明史》志第十五 历九


▲回回历法三

土星黄道南北纬度立成上横行,以小轮心定度为引数,起五十度,异累加三度。累加三度。首直行以自行定度为引数,累加十度。求法:简两引数近度,纵横相遇度分,次各用比例法,得细率。 

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分类:正史书名:明史作者:张廷玉等

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