Lantern slide of the South Street bridge, Philadelphia, PA, c. 1900.
Thursday, September 15, 2016, 5:30 pm EDT
Thursday, September 15, 2016, 2:16 pm EDT
Philadelphia Area Seminar on History of Mathematics (Villanova, PA)
Tuesday, September 13, 2016, 11:00 pm EDT
Center for Science & Society at Columbia University (New York, NY)
Tuesday, September 13, 2016, 6:22 pm EDT
New York Academy of Medicine (New York, NY)
Tuesday, September 13, 2016, 5:30 pm EDT
American Center for Physics (College Park, MD)
Saturday, September 10, 2016, 4:00 pm EDT
Linda Hall Library (Kansas City, MO)
Friday, September 9, 2016, 12:00 am EDT
Linda Hall Library (Kansas City, MO)
Monday, July 18, 2016, 11:00 pm EDT
The New York Academy of Medicine (New York, NY)
Monday, July 11, 2016, 2:00 pm EDT
University of Pennsylvania and the Penn Museum (Philadelphia, PA)
Thursday, June 16, 2016, 9:00 pm EDT
History Seminar on Contemporary Science and Technology (Washington, D.C.)
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