Engineering Photographs and Negatives, 1950-66, 1984, include digital surrogates related to research in departments (e.g. the ILLIAC computers in the Digital Computer Lab, testing plasma jet generators in the Department of Aeronautical Engineering and laboratories, electrical engineering research in the Antenna Lab, and metallurgical and mining engineering research using Filar Micrometer microscopes equipped with relay lenses to measure length of metals at elevated temperatures) as well as faculty portraits (1984) by department.