Minerals and Metals in Ancient India v2.c44.s3.12
Minerals and Metals in Ancient India v2.c44.s3.12
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v2.c44.s3.12
Rasaka (Calamine) digested repeatedly with fermented paddy-water, natron and clarified butter, and mixed with wool, lac, Terminalia Chebula and borax and roasted in a covered crucible, yields an essence of the appearance of tin; of this there is no doubt.