History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c36.s6.4
History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c36.s6.4
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c36.s6.4
*Gairika*.—Haematite, which is red and often hard, and limonite, which is yellow or brown; both occur in the form of ochres.