HINDU CHEMISTRY
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of the colour of stones. What wonder is it that Rasaka mixed with [certain organic matters] and roasted three times with copper converts the latter into gold?" VII. 31-34
Extraction of Zinc from Calamine.
Rasaka, mixed with wool, lac, T. chebula and borax and roasted in a covered crucible, yields an essence of the appearance of tin: of this there is no doubt." VII. 37-38
Sasyaka. VII. 41-44
[These couplets have been borrowed word for word by r. r. s. Vide Bk. ii; hence repetition is unnecessary.]
Saurāshtri.
Saurāshtri, alum, distillation of: (See under r. r. s., which has also borrowed this description verbatim.) VII. 73-74
The Metals.
"O goddess! listen now to what I say about the metals.
