曆象本要
太陰高早四限

太陰高早四限

以次餘心行於本物之月,則以以輪家近點行於本輪周,朔望起家近,每本輪心離日度,則次輪最近行扵本輪周分度,而月在次輪則行兩度。朔望至張離日九十度,而月行次綸一八十度,至家遠,歇至朔望亦行百八十度,復至家近,故一月行兩縣。

太陰高早四限

一乙本論冣高又遐次輪冡遠為極高。本物突高過次輪家近為次高,本輪家卑還次輪靈道爲次身。本輪最卑又混净輪最遮器極皁出去地遠,地徑小;皁則去地近,視徑大,太陰大差。水訟一表蜀高行滿初九十度至留際,遲積度五度。每自家半行滿腕初九十度至留際,疾積度亦五度奇,是為本輪上遠疾大差,明望用之。居本翰行至留際,又過次給之家遠,則其遲疾各得七度四十分,以爲大差,兩肱用之。是要遲疾大差之四限。一二

End of chapter

Text and scans: Shidian Guji (Peking University – ByteDance open ancient texts). Edition details are given per book. Shidian Guji

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