American Philosophical Society Library
The American Philosophical Society Library is a major national center for research in the history of the sciences, medicine, and technology. With its roots extending back to the founding of the Society in 1743, it houses over 350,000 volumes and bound periodicals, eleven million manuscripts, 250,000 images, and thousands of hours of audio tape. The collections include Early American History, Maps, Native American Materials, Naval History, Recordings, and more. Located in Philadelphia, Pennsylvania.