Indian Science and Technology in the Eighteenth Century: Some Contemporary European Accounts c23.s5.t1.3
Indian Science and Technology in the Eighteenth Century: Some Contemporary European Accounts c23.s5.t1.3
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c23.s5.t1.3
*Surma* (No.4) is distinguished by its red appearance and is usually found mixed with the above, it perhaps contains arsenic and is always carefully picked out, and thrown away; *Peera* (No.3) or yellow ore, is the yellowish brown variety—always intermixed with the other kinds, and marking by its difference of colour their concentric lamellar form, it rarely occurs separate, its streak is yellow.