The original formula was given by Sreenath but Donald Qualls did work on it and introduced it to the photo community. His original instructions are here:
http://silent1.home.netcom.com/Photo...html#Parodinal
His version is cloudy.If you want a version that is clear the procedure summarized by Mr O'Connor on p2 of the link I posted above is as good as it gets.The performance of the cloudy and clear versions is identical. Read the safety notes on sodium hydroxide, it is caustic and dissolves people or parts thereof.
Acetaminophen=Tylenol=Paracetamol for this purpose.