|Series III: Aeronautical Research and the Aerodromes|
This series consists of notes, data, drawings and memoranda from Langley's aeronautical research at both the Smithsonian and the Allegheny Observatory. Subseries 2 contains material used in various Smithsonian exhibitions of the Langley Aerodromes. Other drawings are included in Series IX. Additional notes and drawings are included in Series XI.