Image of Andrew W. Mellon. Mellon, who served as the Secretary of the Treasury and ambassador of the United States to the Court of St. James, was a patron of the arts and sciences. Image courtesy of the Historical Society of Pennsylvania.
Friday, April 17, 2009, 6:33 pm EDT
The Academy of Natural Sciences, Ewell Sale Stewart Library
Friday, April 17, 2009, 4:25 pm EDT
American Philosophical Society Museum, Philadelphia Area Center for History of Science
Friday, April 17, 2009, 1:00 am EDT
Philadelphia Area Seminar on the History of Mathematics (PASHoM)
Friday, April 17, 2009, 1:00 am EDT
The College of Physicians of Philadelphia
Thursday, April 16, 2009, 2:00 am EDT
The Historical Society of Pennsylvania
Thursday, April 16, 2009, 1:04 am EDT
Barbara Bates Center for the Study of the History of Nursing, University of Pennsylvania
Wednesday, April 15, 2009, 4:00 pm EDT
The Library Company of Philadelphia
Wednesday, April 15, 2009, 4:29 am EDT
Chemical Heritage Foundation
Tuesday, April 14, 2009, 1:00 am EDT
Department of History and Sociology of Science, University of Pennsylvania
Thursday, April 9, 2009, 4:00 am EDT
Rittenhouse Astronomical Society
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