Friday, February 6, 2015, 4:30 pm EST
Wednesday, February 4, 2015, 5:30 pm EST
Tuesday, February 3, 2015, 4:00 pm EST
Monday, February 2, 2015, 8:30 pm EST
University of Pennsylvania, History and Sociology of Science, Speaker Series
Sunday, February 1, 2015, 9:00 pm EST
Katz Center for Advanced Judaic Studies, UPenn
Tuesday, January 27, 2015, 4:00 pm EST
Rutgers Center for Historical Analysis, Seminar Series
Saturday, January 24, 2015, 4:00 pm EST
Bibliography Week Lecture, New York Academy of Medicine
Thursday, January 22, 2015, 11:00 pm EST
The Philadelphia Area Seminar on History of Mathematics
Wednesday, January 21, 2015, 5:30 pm EST
Tuesday, January 20, 2015, 11:00 pm EST
Columbia University Seminar (History and Philosophy of Science)
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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