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
What Child Is This? What Child Is This? "What Child Is This?" is a Christmas carol whose lyrics were written by William Chatterton Dix, in 1865. At the time of composing the carol, Dix worked as an insurance company manager and had been struck by a severe illness. While recovering, he underwent a spiritual renewal that led him to write several hymns, including lyrics to this carol that was subsequently set to the tune of "Greensleeves", a traditional English folk song. Although it was written in Great Britain, the carol is more popular in the United States than in its country of origin today.