Philadelphia Central High School for Boys and Pennsylvania State Arsenal, 1839. This daguerreotype, created by Joseph Saxton, is the oldest known photograph taken in the United States. Image courtesy of the Historical Society of Pennsylvania.
Friday, November 16, 2007, 6:39 pm EST
Pennsylvania Hospital
Thursday, November 15, 2007, 10:00 pm EST
Philadelphia Area Seminar on the History of Mathematics (PASHoM)
Thursday, November 15, 2007, 9:12 pm EST
University of Pennsylvania Bookstore
Thursday, November 15, 2007, 7:30 pm EST
College of Physicians of Philadelphia
Wednesday, November 14, 2007, 8:07 pm EST
The Wagner Free Institute of Science
Wednesday, November 14, 2007, 5:49 pm EST
Barbara Bates Center for the Study of the History of Nursing, University of Pennsylvania
Wednesday, November 14, 2007, 4:37 pm EST
The McNeil Center for Early American Studies
Tuesday, November 13, 2007, 5:00 pm EST
Chemical Heritage Foundation, Brown Bag Lecture
Monday, November 12, 2007, 8:14 pm EST
The Wagner Free Institute of Science
Monday, November 12, 2007, 11:41 am EST
Department of History and Sociology of Science, University of Pennsylvania
© 2026 Consortium for History of Science, Technology and Medicine | Copyright Infringement