The impurities of ores, whether superficial or inseparably combined with them can be got rid of and the metal melted when the ores are (chemically) treated with Tikshna urine (mútra) and alkalies (kshára), and are mixed or smeared over with the mixture of (the powder of) Rajavriksha (Clitoria Ternatea), Vata (Ficus Indica), and Pelu (Carnea Arborea), together with cow's bile and the urine and dung of a buffalo, an ass and an elephant.