Iron(II) sulfate was used in the textile industry for centuries as a dye fixative. It is used historically to blacken leather and as a constituent of ink. The preparation of sulfuric acid ('oil of vitriol') by the distillation of green vitriol (Iron(II) sulfate) has been known for at least 700 years. Together with other iron compounds, ferrous sulfate is used to fortify foods and to treat and prevent iron deficiency anemia. Constipation is a frequent and uncomfortable side effect associated with the administration of oral iron supplements. Stool softeners often are prescribed to prevent constipation. Ferrous sulfate was used in the manufacture
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