- Aeronautics (2)
- Aeronautics, Commercial (1)
- Aeronautics, Military (1)
- Air pilots (1)
- Aviation Instruction Center, 3rd (France) (1)
- Aviation medicine (1)
- Bradenburg C.I.(U) (1)
- Explorer II (Balloon) (1)
- Hazelhurst Field, Mineola, N.Y. Medical Research Laboratory (1)
- Mining (1)
- Oil wells (1)
- Periodicals (1)
- Wilmer Ophthalmological Institute (1)
- Works of art (1)
Our collections specialists actively work on the conservation, preservation, restoration, and long-term care of the objects in our collection. From full-scale restoration projects to applying preservation techniques and doing regular assessments, these activities form a crucial part of our stewardship of the National Collection.