玉清內書
直符更漏進退圖

直符更漏進退圖

直符更漏進退圖

訣曰:直符合加减時節,須取刻漏,分明合進退,依法用之,更漏合加减定時,候盈縮有徑門而已。但取晝夜長短,刻十二辰子丑寅卯辰巳午未申酉戌亥等。從子時初,於水滴看日,照至丑時,合用多少水。但作桶子,高三尺,内圓闊一尺,近底稜邊鑽一小孔子,内鳥翅翎管緊安其中,蠟塞四面,即盛水令滿、任於滴下,盡即却投在内,任滴,看至一辰位,合用水幾桶子,即知諸時用水桶數。晝夜分十二辰位,約定桶子多少,與秤之更漏无别。如滴水有多有少,即晝夜長短,但用意消息,萬不失一。

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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