Conservation
Posts related to the Conservation Department
January 7, 2022
It is impossible for any sensitive person to look at a star-filled sky without being stirred by thoughts of creation and eternity. The mystery of...
September 23, 2021
Once I had solved the problem of resewing John Blair’s Chronology and History of the World from Creation to the Year of Christ, 1788, which...
June 23, 2021
Contact: 215-701-4427 [email protected] Philadelphia [June 23, 2021]— The Declaration of Independence is an iconic document, famous for the signers’ distinctive signatures and the bold heading...
April 29, 2021
When last I mentioned Joseph Priestley’s copy of John Blair’s Chronology and History of the World from Creation to the Year of Christ, 1788, the...
February 25, 2021
While iron gall ink was an incredibly popular ink from the 4th to the 20th centuries, it is now known to have damaging effects on...
October 7, 2020
Sometimes a project arrives in the conservation lab as a mystery. It might be damaged, so in order for the cataloguers and librarians to safely...
August 26, 2020
Joseph Priestley, a chemist who isolated oxygen and several other gases, was also a teacher. His focus on pedagogy led him to create some of...
April 3, 2020
Willman Spawn Conservation Intern Joanna Hurd spent only two weeks at the American Philosophical Society before the novel coronavirus sent everyone home, but in that...