JABIR IBN HAYYAN
HE IS CONSIDERED BY MANY TO BE HE FATHER OF CHEMISTRY

He is widely credited with the introduction of the experimental method in alchemy, and with the invention of numerous important processes still used in modern chemistry today, such as the syntheses of hydrochloric and nitric acids, distillation, and crystallisation.
His original works are highly esoteric and probably coded, though nobody today knows what the code is.

— Ref.: http://en.wikipedia.org/wiki/Geber