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Moving into Library Hall
Museum Exhibition "From the Laboratory to the Parlor: Scientific Instruments in Philadelphia, 1750–1875,"
Northwest View of 5th and Chestnut after demolition of Drexel Building
Open House at Philosophical Hall
Open House at the American Philosophical Society
Plan for Independence National Park
Plan of an ancient work
Plan of the nitre cave described by Dr. Samuel Brown
Plaque designating Philosophical Hall as a National Historic Landmark
Pope John Paul II with members and guests of the American Philosophical Society
Reading Room, Library Hall, ca. 1980s
Reception in the Reading Room
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