ஆறு வகையான பேதிக்குங் கற்கள் – According to Tamil Siddhar’s Science the six kinds of mineral solvents as enumerated below:-
1. அன்ன பேதி, Copper sulphate, the solvent of rice food.
2. மாமிச பேதி, a mineral – solvent of flesh or meat.
3. சொர்ண பேதி, that which dissolves gold in it.
4. அஸ்தி பேதி, a mineral which is capable of dissolving bones.
5. சகஸ்திர பேதி, another solvent of a similar nature that could dissolve several substances