Subject
- Delaware and Hudson Railway Company1
- Diagrams1
- Drafts (documents)1
- Drops1
- Electrostatics2
- Field Notes1
- Files by subject1
- History of science and technology1
- Hudson River (N.Y. and N.J.)1
- James Bay Region1
- Laboratory Notes1
- Lecture notes1
- Lightning2
- Manuscripts (document genre)2
- Maps2
- Memorabilia2
- Minutes1
- Native Americans1
- Negatives (photographic)1
- New York (State)--Politics and government1