Page:A History of Hindu Chemistry Vol 1.djvu/218

68 resembles the nipple of a cow and is fitted with a lid, which has a raised head.

"For the purification of silver, the crucible is best made of two parts of the ashes of schrebera swietenoides, and one part each of brick dust and earth."

"Copper yields a blue flame.........that of the tin is pigeon-coloured; that of the lead is pale-tinted ......that of the iron is tawny; ...that of the "peacock" ore (sasyaka) is red."

"A pure metal is that which, when melted in a crucible, does not give off sparks nor bubbles, nor spurts, nor emits any sound, nor shows any lines on the surface, but is tranquil like a gem.