- Aeronautics (8)
- Aeronautics, Military (2)
- Airships (2)
- Periodicals (2)
- Aeronautics, Commercial (1)
- Balloon gases (1)
- Balloonists (1)
- Civil War, 1861-1865 (1)
- Gliding and soaring (1)
- Kites (1)
- Meteorology (1)
- Meterologists (1)
- Mt. Lowe Railway (1)
- Pneumatics (1)
- Railroads (1)
- Travel (1)
- World War, 1914-1918 (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.