E3: 2.25 inch slides, undated

George used the slides in this series for teaching and presentation purposes. Each of the slides in this series is marked with its frame number, which corresponds to its individual entry in George's photo records. To facilitate identification of specific subjects and locations, a detailed finding aid to the photo log records is available as an Excel spreadsheet. Many of the materials in this subseries are also available as 35mm slides, color transparencies, or negatives.