Place
- Massachusetts--Cambridge4
- New York (State)4
- New York (State)--Rochester4
- Pennsylvania--Pittsburgh4
- New Jersey--Camden3
- Pennsylvania--Lower Merion (Township)3
- Pennsylvania--Tarentum3
- University of Pennsylvania3
- Academy of Natural Sciences of Philadelphia2
- Bucknell University2
- Delaware College2
- Delaware--Dover2
- Delaware--New Castle2
- Germany--Berlin2
- Germany--Heidelberg2
- Massachusetts--Princeton2
- New Jersey--Burlington2
- New York (State)--Troy2
- Pennsylvania--Chambersburg2
- Pennsylvania--Lewisburg2