Digesting gold (bija) in purified mercury

Seeing the purified mercury shining with a lustre like the sun, the physician bows to the siddhas and worships it with care, then puts into it a quarter part of suitable, very red bija (gold) and digests it by the method of garbhadruti. The mercury is strained through a fine cloth folded double; vida impregnated with the three alkalis, trikatu, the salt group and the sour group is placed above and below it, it is tied into a bundle with banana, palasha and lotus leaves, and the bundle is steamed through a dolayantra in a large vessel of kanji to which cumin fourfold has been added; the learned physician does this every night.