Monday, February 11, 2013, 8:30 pm EST
Department of the History and Sociology of Science, University of Pennsylvania
Friday, February 8, 2013, 10:30 pm EST
American Philosophical Society
Thursday, February 7, 2013, 8:00 pm EST
Johns Hopkins Program in the History of Science, Medicine and Technology
Thursday, February 7, 2013, 4:45 pm EST
Wednesday, February 6, 2013, 10:00 am EST
Wednesday, February 6, 2013, 9:00 am EST
Tuesday, February 5, 2013, 5:45 pm EST
Tuesday, February 5, 2013, 5:00 pm EST
Chemical Heritage Foundation, Brown Bag Lecture
Tuesday, February 5, 2013, 4:00 pm EST
RCHA Tuesday Morning Seminar Series, Rutgers University
Monday, February 4, 2013, 8:30 pm EST
Department of the History and Sociology of Science, University of Pennsylvania
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.
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