Letter, 1905 Nov. 6, Washington, to Mary L. Herrick, Cleveland.
There are 2 Entities related to this resource.
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....