Wednesday, February 8, 2012, 5:00 pm EST
Barbara Bates Center for the Study of the History of Nursing, University of Pennsylvania
Tuesday, February 7, 2012, 5:00 pm EST
Chemical Heritage Foundation, Brown Bag Lecture
Saturday, February 4, 2012, 5:00 pm EST
Academy of Natural Sciences
Friday, February 3, 2012, 9:00 pm EST
Philadelphia Area Center for History of Science
Wednesday, February 1, 2012, 11:30 pm EST
Academy of Natural Sciences
Wednesday, February 1, 2012, 10:00 am EST
Wednesday, February 1, 2012, 9:00 am EST
Tuesday, January 31, 2012, 5:00 pm EST
Chemical Heritage Foundation, Brown Bag Lecture
Saturday, January 28, 2012, 2:00 pm EST
New Jersey State Museum
Wednesday, January 25, 2012, 10:00 pm EST
Penn Humanities Forum
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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