The History of Science Collections, located on the 5th floor of Bizzell Memorial Library, is a premier research collection in its field. Holdings of nearly 100,000 volumes from every field and subject area of science, technology and medicine range chronologically from Hrabanus Maurus, Opus de universo (1467) to current publications in the history of science. The Darwin collection consists of all of Darwin’s works in their first editions and several autographed letters, as well as hundreds of subsequent editions and translations. For more information, please visit our Guide to the History of Science Collections. To learn about the history of the Collections, please view The First 50 Years of the History of Science Collections.