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
Today is Friday within his writing. In fact, "Today is Friday" was not the only story within "Men Without Women" to reference boxing, the story, Fifty Grand is explicitly about a boxer training for a prizefight. Hemingway's apparent obsession with boxing is documented in multiple archived letters and he is widely quoted as having said, "my writing is nothing, my boxing is everything" whilst being interviewed by Josephine Herbst. The way in which Hemingway appreciated boxing is made ever more vivid through the way he characterised Christ as a gallant boxer in "Today is Friday". Indeed, the play has been noted one of