Samuel Pierpont Langley and his aerodromes 1980 [manuscript]
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Langley, S. P. (Samuel Pierpont), 1834-1906
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Samuel Pierpont Langley (1834-1906) was the third Secretary of the Smithsonian Institution. He also served as the director of the Allegheny Observatory and a professory of astronomy at the Western University of Pennsylvania (now known as the University of Pittsburgh). While at the Smithsonian he founded the Smithsonian Astrophysical Observatory....
Martin, Hunt V.
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A paper presented before the Historical Society of Western Pennsylvania on October 12, 1980. From the description of Samuel Pierpont Langley and his aerodromes 1980 [manuscript] (Historical Society of W Pennsylvania). WorldCat record id: 610439601 ...