- Archival materials (15)
- Collection descriptions (15)
- Photographs (8)
- Reports (3)
- Articles (2)
- Clippings (2)
- Notes (2)
- Photographic prints (2)
- Publications (2)
- Cartes-de-visite (1)
- Diaries (1)
- Financial records (1)
- Logbooks (1)
- Manuscripts (1)
- Maps (1)
- Newsclippings (1)
- Press releases (1)
- Scrapbooks (1)
- Stereoscopic photographs (1)
- Aeronautics (14)
- Aeronautics, Military (5)
- Airships (3)
- Periodicals (3)
- Aeronautics, Commercial (2)
- Balloons, Sounding (2)
- Rockets (Aeronautics) (2)
- Rockets, Sounding (2)
- Stratolab Program (2)
- Stratoscope II (2)
- Vertically rising aircraft (2)
- Astronautics (1)
- Atmosphere, Upper (1)
- Balloon gases (1)
- Balloonists (1)
- Civil War, 1861-1865 (1)
- Gliding and soaring (1)
- Infrared spectroscopy (1)
- Infrared telescopes (1)
- Kites (1)
- Meteorology (1)
- Meterologists (1)
- Mt. Lowe Railway (1)
- Pneumatics (1)
- Project Vanguard (1)
- Railroads (1)
- Rocketry (1)
- Stratoscope I (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.