Description of the Collection Negatives and contact prints of black and white images documenting scientists and research projects of Armour Research Foundation (later, IITRI). Negatives are 2¼" sq. and 4x5" and are housed in paper envelopes with numbers corresponding to the images in the index list below. Negatives also have an inventory number (3 or 4 digits) which is different from that on the envelope. This appears to be a earlier...