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
Guess What We Learned in School Today? Guess What We Learned in School Today? Guess What We Learned in School Today? (also released in the United States as I Ain't No Buffalo) is a 1970 film directed by John G. Avildsen and written by Eugene Price. The movie premiered at the Cannes Film Festival in 1970 and opened in the United States in 1971. Although it was shot before Avildsen's "Joe", it got distribution afterward due to "Joe's" success. Tagline: "Love American style with a touch of X." Parents in a small, conservative community want to ban sex education in schools, labeling it a Communist plot. However,