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 Is History? of change. If you are allergic to these processes, you abandon history and take cover in the social sciences. Today anthropology, sociology, etc, flourish. History is sick. But then our society too is sick". Carr deplored the rise of Structuralism. Carr wrote there was the structuralist approach, which Carr called a "horizontal" way of understanding history "which analyses a society in terms of the functional or structural inter-relation of its parts". Against it, there was what Carr called the "vertical" approach "which analyses it [society] in terms of where it has come from and where it is going". Through Carr