The Jewel Mine of Mercury

...one should grind with goat's milk. Having ground it for a pair of yāmas, put it in a crucible, and having dried it, seal it. In the Vajramuṣā, that mercury is killed. Shri. Thus, in the Rasaratnākara composed by Nityanatha Siddha, the son of Parvati, in the Rasa-khaṇḍa, the second chapter called the Rasa-rudhna-māraṇa The Killing/Fixing of Mercury is finished. 2. Now the Rasa-jāraṇa digestion/absorption of mercury is described. Now, the Jāraṇa digestion: first, with the seed, the killing should be done. Whatever seed is undigested, one should not cause that mercury to do. ... Therefore, with all effort, one should kill the digested mercury. Having placed it in a smoke-vessel type of crucible of cow-dung, and above that, putting oil of Kaṭutumbī, throw the mercury in. The juice of Kākamācī Solanum nigrum, twice the oil, again and again. Throwing in sulfur of the measure of a grain, one should seal it. Afterward, give fire. When it is digested, the fire rises; it becomes cool. The digested oil, sulfur, and Kākamācī juice, one should digest by the fire of ṭaṅkāra borax. Below the crucible, place moist cow-dung, and above, place the fire. Six parts of sulfur are digested by the mercury. In this way, it becomes the face ready for use. One should grind that mercury in a mortar with Jambīra juice for a day. One sixty-fourth part, and previously one-twentieth part, then again one-sixteenth part; one should digest the pure [substance] in the mercury. Smeared with... in oil, throw it in the mercury for a yāma with Jambīra juice. Grind as before... fill the crucible with Jambīra juice...