History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c15.s2.51
History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c15.s2.51
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c15.s2.51
(2) Make a paste with the juice of the plant *arka* (*Calotropis gigantea*), the gelatine from the horn of the sheep, and the dung of the pigeon and the mouse ; apply it to the steel after rubbing the latter with sesame oil. Plunge the steel thus treated into fire ; and when it is red hot, sprinkle on it water or the milk of horse (camel or goat), or ghee (clarified butter), or blood, or fat, or bile. Then sharpen on the lathe.—(Varahamihira, *Khargalakshanam* Chap. XLIX, slokas 23,—26).