History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c34.8
History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c34.8
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c34.8
*Valuka Yantram* (sand-bath):—A glass flask with a long neck containing mercurials is wrapped with several folds of cloth smeared with clay, and then dried in the sun The flask is buried up to three-fourths of its length in sand placed in an earthen pot, whilst another pot is inverted over it, the rims of both being luted with clay. Heat is now applied till a straw placed on its top gets burnt (Fig. 30 D).