- Archival materials (12)
- Collection descriptions (12)
- Photographs (5)
- Correspondence (3)
- Publications (3)
- Scrapbooks (2)
- Articles (1)
- Diaries (1)
- Glass negatives (1)
- Lantern slides (1)
- Manuscripts (1)
- Maps (1)
- Photographic prints (1)
- Postcards (1)
- Stereoscopic photographs (1)
- Transparencies (1)
- Woodcuts (1)
- Aeronautics (12)
- Kites (4)
- Aeronautics, Military (3)
- Aeronautics, Commercial (2)
- Gliding and soaring (2)
- Periodicals (2)
- Aerial photography (1)
- Aeronautical instruments (1)
- Airplanes (1)
- Buffalo (Airship) (1)
- Charliere hydrogen balloon (1)
- Civil War, 1861-1865 (1)
- Ganymede (Airship) (1)
- Great Western (Airship) (1)
- Langley Aerodrome No 5 (1895-96) (1)
- Madame Carlotta (Airship) (1)
- Phantom Balloons (Airships) (1)
- Research aircraft (1)
- Russo-Japanese War, 1904-1905 (1)
- Scientific apparatus and instruments (1)
- South African War, 1899-1902 (1)
- Spanish-American War, 1898 (1)
- The Aerial (Airship) (1)
- U.S. Signal Corps SC-1 free balloon (1)
- Works of art (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.