Sulfuric acid the Hellenistic alchemical works of Zosimos of Panopolis, in the treatise "Phisica et Mystica", and the Leyden papyrus X. Medieval Islamic era alchemists, Jābir ibn Hayyān (c. 721 – c. 815 AD, also known as Geber), Razi (865 – 925 AD), and Jamal Din al-Watwat (d. 1318, wrote the book "Mabāhij al-fikar wa-manāhij al-'ibar"), included vitriol in their mineral classification lists. Ibn Sina focused on its medical uses and different varieties of vitriol. Sulfuric acid was called "oil of vitriol" by medieval European alchemists because it was prepared by roasting "green vitriol" (iron(II) sulfate) in an iron retort. There are
Ji (Korean name) Ji (Korean name) Ji, also spelled Jee, Chi, or Chee, is a Korean family name, as well as a popular element in Korean given names. The meaning differs based on the hanja used to write it. As a family name, Ji may be written with either of two hanja, one meaning "wisdom" (), and the other meaning "pond" (). Each has one "bon-gwan": for the family name meaning "wisdom", Pongju Village, Pongsan County, North Hwanghae in what is today North Korea, and for the family name meaning "pond", Chungju, Chungcheongbuk-do in what is today South Korea. The 2000 South Korean