Scope and Contents The subseries Aperture Cards and Slides contains positive film-based images of both people and subjects, as individual frames encased in aperture cards (with associated description on the card) or, to a lesser extent, 35mm slides (with limited description). Most files contain less than 5 images; a few contain several.Topics vary but some that appear frequently include sports, such as golf, basketball, football, and auto racing (Indy and sprint); food; Dayton Newspapers Inc. (DNI)...