From the Malacology collection, one of the largest in the world.
Wednesday, April 8, 2009, 2:16 am EDT
Chemical Heritage Foundation, Brown Bag Lecture
Tuesday, April 7, 2009, 1:00 am EDT
Department of History and Sociology of Science, University of Pennsylvania
Saturday, April 4, 2009, 1:03 pm EDT
The Franklin and Istituto e Museo di Storia della Scienza
Saturday, April 4, 2009, 12:00 am EDT
Friends of the Library of the American Philosophical Society
Thursday, April 2, 2009, 1:46 am EDT
Barbara Bates Center for the Study of the History of Nursing, University of Pennsylvania
Wednesday, April 1, 2009, 2:12 am EDT
Chemical Heritage Foundation, Brown Bag Lecture
Tuesday, March 31, 2009, 1:00 am EDT
Department of History and Sociology of Science, University of Pennsylvania
Sunday, March 29, 2009, 4:00 am EDT
Chemical Heritage Foundation
Friday, March 27, 2009, 5:54 pm EDT
Chemical Heritage Foundation
Friday, March 27, 2009, 1:00 am EDT
The College of Physicians of Philadelphia<b></b><b></b>
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