History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c27.s1.3
History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c27.s1.3
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c27.s1.3
Mica, heated seven times and plunged into sour gruel, or cow's urine, or decoction of the chebulic myrobalans, or cow's milk, is freed from all impurities.