chemists who developed the art of distillation during the Abbasid caliphate , the most notable of whom were Jabir ibn Hayyan (Geber), Al-Kindi (Alkindus) and al-Razi (Rhazes). The writings attributed to Jabir ibn Hayyan (721-815) mention the flammable vapors of boiled wine. Al-Kindi (801-873) unambiguously described the distillation of wine. [2]