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Samuel Pierpont Langley, Secretary, Smithsonian Institute, 1913. Creator: Harris & Ewing.
HRM23A22_305

Samuel Pierpont Langley, Secretary, Smithsonian In...

Langley, Samuel Pierpont, Secretary, Smithsonian Institute - Memorial Tablet in Entrance of Smithsonian, 1913.
HRM22B30_207

Langley, Samuel Pierpont, Secretary, Smithsonian I...

Samuel Pierpont Langley, Secretary, Smithsonian Institute, 1913. Creator: Harris & Ewing.
HRM23A22_304

Samuel Pierpont Langley, Secretary, Smithsonian In...

American aviation pioneers Charles M. Manly and Samuel Pierpont Langley, c1890s. Creator: Unknown.
HRM21B20_399

American aviation pioneers Charles M. Manly and Sa...

Portrait of Samuel Pierpont Langley (1834-1906), Before 1890. Creator: James Notman.
HRM21A86_273

Portrait of Samuel Pierpont Langley (1834-1906), B...

Portrait of Samuel Pierpont Langley (1834-1906), August 22, 1887. Creator: James Notman.
HRM21A86_272

Portrait of Samuel Pierpont Langley (1834-1906), A...

Langley Aerodrome Number 5, 1896. Creator: Smithsonian Institution.
HRM21A87_472

Langley Aerodrome Number 5, 1896. Creator: Smithso...

Langley Quarter-scale Aerodrome, 1903. Creator: Smithsonian Institution.
HRM21A87_473

Langley Quarter-scale Aerodrome, 1903. Creator: Sm...

Professor Samuel P Langley's aeroplane, 1903. Creator: Unknown.
HRM19D78_345

Professor Samuel P Langley's aeroplane, 1903. Cre...