Scope and Content Correspondence, 1895-1936, concerning his botanical studies, including his work on the American Midland Naturalist, and his chemical studies, including correspondence with researchers at Du Pont, such as W.H. Carothers and W.S. Calcott, documenting his progress in perfecting the formula for neoprene; botany lecture notes, notes taken by Nieuwland as a student, manuscripts of works by Nieuwland, pamphlets, patents by...