Thursday, November 13, 2014, 9:00 am EST
Wednesday, November 12, 2014, 5:00 pm EST
Wednesday, November 12, 2014, 4:36 pm EST
Samuel X Radbill Lecture, College of Physicians of Philadelphia
Tuesday, November 11, 2014, 4:35 pm EST
Rutgers Center for Historical Analysis, Seminar
Tuesday, November 11, 2014, 4:31 pm EST
Chemical Heritage Foundation, Brown Bag Lecture Series
Tuesday, November 4, 2014, 4:29 pm EST
Rutgers Center for Historical Analysis, Seminar
Tuesday, November 4, 2014, 4:27 pm EST
Chemical Heritage Foundation, Brown Bag Lecture Series
Tuesday, November 4, 2014, 4:00 pm EST
Monday, November 3, 2014, 4:26 pm EST
University of Pennsylvania, History and Sociology of Science, Speaker Series
Monday, November 3, 2014, 3:19 pm EST
Drexel University, Center for Science, Technology, and Society
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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