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Purify zinc by melting it. If mineral calamine sr. is melted, there remains 1 pau from sr. 1.9=(2) of (the mixture). Take the juice of the root of Ajhijhārā (a kind of vanaspati) 1 srs; mix 3 srs. of juice of the root of colocynth with it. Melt mineral calamine in an earthen pot. After melting, give coya (drops) to it by putting the previous juice and give it fire of the Wood of poplar-leaved fig tree (=Ficus religiosa) and it is to be stirred up by a wooden piece of pipal. The essence is accomplished. Melt together these three-copper, silver and the essence. There become's silver. 1
Rub all these together, mercury-Tola 1, oxide of arsenic tola 1 and alum tola 1 with curd for three days. Next put the lump into curd. Then take it out after 11 days and rub it in the juice of citrus lemon for 4 praharas. Next put it into a samputa and give a gentle fire of cowdung, for 4 praharas. On its being cooled down, there becomes the essence. Mix 1 masa of the essence with one tola of copper. There becomes silver."
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Take sal-ammoniac, rub it in the juice of visakhapara (Pig weed or Horse Purslane) for 4 praharas. Next make powder of it by crushing it. Melt kathir (a kind of tin) and put sal-ammoniac into it. Sal-ammoniac will come up, remove it. Thus put sal-ammonic 3 or 4 times. There will be silver.3
Take water of Kathir (a kind of tin), put 1 masa of it into 1 tola of copper by melting it. There becomes silver. Water dries up (gets dried up),
The means of making silver soft:
Take out the root of white Visakhāparā (Pig weed), take its bark and get it dried up. Keep it by making its powder. Melt that which becomes Phuta (not explained) dhata, (metal) and spread that powder over it. It will be soft. The substance is produced."
1. Ibid. 4. 9.
2. SRSS., Ch. 4. 13.
3. SRSS., Ch. 4. 15.
4. SRSS., Ch. 4. 16.
5. Ibid.
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