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
Is This What You Want? the Walrus",<ref name="Staunton/RM 04">Terry Staunton, "Jackie Lomax: "Is This What You Want?"", "Record Collector", July 2004; available at Rock's Backpages (subscription required; retrieved 31 October 2012).</ref> and, conversely, pre-empting the similar-sounding "Come Together" by a full year.<ref name="Unterberger/AM">Richie Unterberger, "Jackie Lomax "Is This What You Want?"", AllMusic (retrieved 31 October 2012).</ref> Recording for "Is This What You Want?" began at EMI Studios in London in June 1968 and continued through the summer in between Harrison's work on the Beatles' White Album. While working alone at Trident Studios, down the hall from where the band were recording, Lomax was invited to