A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c13.32
A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c13.32
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v1.c13.32
“Singhana (Jaipore State).—The copper mines at Singhana are situated in rocks belonging to the Arvali series. The earliest account of these mines, which is believed to have been by Captain Boilcan, was published in the year 1831. The principal productions were copper, blue vitriol or copper sulphate, alum, and an ore of cobalt called *sehta* or *saita*.