明史 · 佚名 · Chapter 39 of 333

志·卷十五

PinyinModern Translation
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lì jiǔ

◎历九

huí huí lì fǎ sān

▲回回历法三

tǔ xīng huáng dào nán běi wěi dù lì chéng shàng héng xíng yǐ xiǎo lún xīn dìng dù wèi yǐn shù qǐ wǔ shí dù yì lèi jiā sān dù

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。

lèi jiā sān dù

累加三度。

shǒu zhí xíng yǐ zì xíng dìng dù wèi yǐn shù lèi jiā shí dù

首直行以自行定度为引数,累加十度。

qiú fǎ jiǎn liǎng yǐn shù jìn dù zòng héng xiāng yù dù fēn cì gè yòng bǐ lì fǎ de xì lǜ

求法:简两引数近度,纵横相遇度分,次各用比例法,得细率。

biǎo gé lüè

(表格略)

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