How do the editor's footnotes define bija, garbhadruti and vida?

Bija is a metal that, put into another metal while it is being cooked, gives it its own colour, and pure gold and silver are also called bija; garbhadruti is making what mercury has swallowed liquid inside the mercury; vida is the mixture of alkalis, sour substances, sulphur, cow urine, salts and the like used to digest what mercury has swallowed.