Online Catalog (Harlow) | Photo Archives | World's Columbian Exposition of 1893 Online Collections | Online Specimen Collection Databases The Library’s collections are an indispensable resource for the Museum’s research, exhibit development and educational programs. The 275,000 volumes of the Main Research Collections concentrate on biological systematics, environmental and evolutionary biology, anthropology, archaelogy, museology and related subjects. Three special collections supplement these holdings: The Mary W. Runnells Rare Book Room, the Photo Archives and the Institutional Archives preserve actively used special materials. These collections document the development of the Museum and its collections and the history of its programs and of the scientific disciplines it pursues. Use our Online Catalog, Harlow Available on the Web since 2002, Harlow provides public access to over 41,000 titles in the Main Research Collections, including 3,000 journals, all books acquired since 1978, and new book acquisitions as they are received. Library Photo Archives The Photo Archives holds over 250,000 scientific and historical images. View a small sample of images and descriptive captions of some of the most frequently requested photographs held in this rich image archive. Price information and order forms are provided for purchasing reproductions. World's Columbian Exposition Online Collections In its special collections the Library holds important original materials from the Exposition and a wealth of material relating to the founding and early history of The Field Museum. Our digital presentation of these collections allows you to browse or search among these holdings and view images at high resolutions using Luna Imaging Inc.’s Insight Browser software. Online Specimen Collections Databases The research departments of the Academic Affairs division offer public access to a number of online databases providing scientific information and images of some of the 22 million objects in the Museum’s collections.