History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c37.s1.27
History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c37.s1.27
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c37.s1.27
"Alum is also manufactured from the water of a hot spring north of Mhurr in Cutch. The impure saltpetre, required for making alum, is obtained by lixiviation of village refuse."—Ball's *Economic Geology of India*, pp. 431-33.