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
National Linseed Oil Trust National Linseed Oil Trust The National Linseed Oil Trust of St. Louis, Missouri, was a major company trust formed in 1885 to protect linseed oil interests in the United States. Once used extensively in painting, the oil today is also commonly known as "flax seed oil". The Trust was dissolved in 1920 after the U.S. Department of Justice charged they broke the Sherman Antitrust Act. Omaha millionaire Clark Woodman was an influential director on the board. Viewed today as one of many imitators of the Standard Oil Company, the Linseed Oil Trust's peers included the Cotton Oil Trust, Lead Smeltering