Page:A History of Hindu Chemistry Vol 1.djvu/203

Rh remedy for turning grey hair into black (ibid; p. 162).

It is called Rasāyana because it has a beneficial effect on Rasa or chyle and other elements of the body. Cf. p. 32.

Bitumen is produced from the following four metals: Gold, copper, silver and iron. Gold and other metals in the mountains, when heated by the sun, emit their impurities, oil-like, heavy and clay-like: these are the bitumen.

With certain vegetable drugs and "riparian sulphide of antimony," a linctus is made up with honey into a paste. (Pt. ii. fasc. II. p. 123)