Spider-legged saxifrage, found on Cornwallis Island by Penny and Sutherland. From Curtis's Botanical Magazine, ser. 3, v.7. 1851. Plate 4621. Image courtesy of Linda Hall Library
Saturday, January 17, 2015, 7:00 pm EST
PhACT (Philadelphia Association for Critical Thinking)
Friday, January 16, 2015, 6:00 pm EST
Wednesday, January 14, 2015, 10:15 pm EST
History of Material Texts workshop, University of Pennsylvania
Wednesday, January 14, 2015, 5:00 pm EST
Tuesday, January 13, 2015, 8:30 pm EST
Drexel University, Center for Science, Technology, and Society
Tuesday, January 13, 2015, 4:45 pm EST
Wednesday, December 17, 2014, 5:30 pm EST
Friday, December 12, 2014, 6:15 pm EST
Thursday, December 11, 2014, 11:30 pm EST
Hagley Museum Research Seminar
Thursday, December 11, 2014, 11:00 pm EST
Philadelphia Area Center for History of Science
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