Use the APS Library

The American Philosophical Society Library is an international center for research with specialties in the history of the sciences, early American history, Native American ethnography and linguistics, and digital innovation.

With roots extending back to the founding of the Society in 1743, the Library of the American Philosophical Society houses over thirteen million manuscripts, 350,000 volumes and bound periodicals, 250,000 images, and thousands of hours of audio tape. The Library's holdings make it among the premier institutions for documenting the history of the American Revolution and Founding, the study of natural history in the 18th and 19th centuries, the study of evolution and genetics, quantum mechanics, and the development of cultural anthropology, among others.

Notable manuscript collections include the papers of Benjamin Franklin, the Journals of Lewis and Clark, a large corpus of Charles Darwin correspondence and printed material, the records of pioneering anthropologists , the holdings of the Eugenics Records Office, and the papers of seven Nobel Laureates.

Among the many extraordinary books are first editions of Sir Isaac Newton's Principia, Charles Darwin's Origin of Species, a presentation copy of Thomas Jefferson's Notes on the State of Virginia, the elephant folio of Audubon's Birds of North America (for which the APS was an original subscriber), as well as a majority of Benjamin Franklin imprints and a significant portion of Franklin's personal library.  

From the blog

Will Fenton
American Philosophical Society