Installation View of Smithsonian Photography Exhibition, c. 1913, , Smithsonian Institution Archives, This image of a photography exhibition is an example of the day-to-day documentation of Smithsonian life and work that curator Thomas Smillie and his staff regularly performed. Smillie used blue cyanotypes like this one to keep track of the glass-plate negatives his staff made, in part because the medium presented a quick and inexpensive way to create photographic prints. The bulky glass negatives were numbered and filed, and a corresponding blueprint catalogue was kept to help readily locate them..