APS offices and the library reading room are closed December 23–January 1 for the holidays. Regular hours resume January 2. The APS museum is open December 26–29, 10 am–5 pm. 

Publications

Celebration of the Hundredth Anniversary of the American Philosophical Society: Proceedings of the APS 1843

American Philosophical Society
Celebration of the Hundredth Anniversary
Transactions of the American Philosophical Society
Volume 107, Part 5
978-1-60618-075-4
Purchase at Penn Press

As part of the 275th anniversary celebration of Benjamin Franklin's founding of the APS, this volume reprints the Proceedings volume published to celebrate the 100th anniversary of the Society.

A new foreword to the volume is provided by Executive Officer Robert M. Hauser.