太古土兌經
鐵粉法

鐵粉法

鐵粉法

成水。

右取鐵錯為末，以烏牛尿中浸一宿，出之，内甆器中，一重鐵末，一重餘甘子末，如是三十一重，密蓋埋屋北陰下，三七日成矣。

End of chapter
紫油丹成伏汞法鍊鉛華法

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

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