Description: Records of Iota Sigma Pi and it local affiliate, the Iodine Chapter (formerly Alpha Theta Chi), including local and national constitutions, by-laws and Officer's Handbooks (1917-63), recordbooks (1915-72), convention reports (1924-60), correspondence (1924-67, 1972-74), local and national history (1915-63), the Iotan (1944-69), membership directories (1919-46), membership records (1952-66), minutes of the meetings of the local chapter (1918-42, 1967-71), newsletters (1931-41), and photographs (1960-63).