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TWELFTH
The process of purification of Copper
(1) Put Tamarind in the milk of she-buffalo and make it loose (dhilusu), pour copper vala 7 into it or by making copper leaf-heated, quench it into it. There takes place the purification of copper (or copper gets purified).
CHAPTER
(2) Rub the lime of Oyster-shell sr. and tin sr. in the milk of Euphorbia nerifolia, or in the milk of Calotropis gigantea sr. for (upto) 1 praharas. Next smear the middle part (peti) of an earthen vessel, give (put) a strong seal into the mouth of the bowl and give it fire for 4 praharas. In the morning, on its getting cooled down, take out the whole essence. Tin, getting melted form its belly (Peti), comes in the middle (inside); grind cinnabar ta. 1, borax (tamkaṇakhāra) ṭā. and Morthuthu and mix them, and stir them up inside into that bowl. Again close the earthen bowl, give it fire for praharas by putting 7 layers of cloth and clay into the mouth of the bowl. Silver.
The process of Pegāmi Navasara (Sal-ammoniac)
(3) Take sal-ammoniae ta. 10, and powder of Nṛtubali1 double (of the former) ta. 20; give sal-ammoniac under and over the latter. Give 7 putas to the whole thing in a Kabaciyantra; go on putting double-double powder in every puta. (As a result) there becomes pamcaramgi (five-coloured) pure pegami navasara. Pure Sal-ammoniac comes from the ship; put that kabacıyantra into that earthen bowl. Cover (it) under and over with double powder, give a lid (śarāvalu) (over it) upside down, put (give) a layer of cloth and clay over it. Fill sand over it, give it fire under it for 1 prahara and give it 7 putas.
Again the process of Chemical action
(4) Grind these things-sal-ammoniac pai. 5, Kalami cuno (a kind of lime) pai. 5, samudrapheņa pai. 5; put them into a big pot (carudo)- under andover, cover it and seal it up. Put seven layers of cloth and clay over it (carudo), dry it up and give it fire into a bhați of a furnace. Next put sal-ammoniac into a pan of Kantiloha (a kind of iron) and make it wet with water; put it there where is air, at night it gets melted and becomes (rasa) (fluid or liquid.) Put it on the furnace in the morning. Give it fire with the wood of cotton till the liquid gets dried up; put it again in the air, again give it fire. It remains in the juice in doing thus. It is produced. 1. Not yet identified.
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