Part 2 - Purification of silver

First Process.

Leaves of gold and the other metals are best purified if they are heated and immersed, while still hot, seven times, in each of the following liquids, respectively:—oil, butter milk, cow’s urine, aranala, and decoction of kulattha.

Second process.

Silver is purified, if it is melted for three times with a little of lead and borax thrown upon it, and then immersed each time in the oil obtained from the fruits of jyotismati.

Third process.

The central portion of an earthen pot is to be enclosed by means of a mortar made of ashes and lime. Inside this enclosure is to be kept silver and an equal quantity of lead. The vessel is then to be heated until the lead is burnt and consumed altogether, leaving the silver purs and free from alloys.

Fourth process.

Leaves of silver are purified, if they are heated for three times and immersed in the juice of agastya, each time it is so heated.

Fifth process.

Physically pure silver is to be purified (medicinally) by means of lead, etc. (see process II and III, above). It is then to be made into fine leaves which are to be heated and immersed in the juices of tamarind and raisins.