History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c15.s1.43
History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c15.s1.43
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c15.s1.43
The black colour is evidently due to the formation of ferrous silicate. There is no evidence that it is due to carbon as has been suggested by some.