History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c34.23

c34.23

*Dhūpa Yantram* (lit. fumigating apparatus) :—Bars of iron are laid in a slanting position a little below the mouth of the lower vessel and gold-leaves are placed over them, and at the bottom of the vessel is deposited a mixture of sulphur, realgar, orpiment, etc. A second vessel, with its convexity turned upwards, covers the mouth of the lower one, and the rims are luted with clay. Heat is now applied from below. This is called fumigation of gold-leaves. Silver may also be similarly treated (Fig 30 A). 70-74