Image ID: SIL-SIL28-062-02
Cite this: Vaeth, J. Gordon (Joseph Gordon). 1966. Langley, man of science and flight, New York : Ronald Press Co.
Original Caption: The Allegheny Observatory as it appeared about the time of Langley's tenure as Director. The present-day observatory is located about one and a half miles to the north of the original site.
