Description: The South Yard behind the Smithsonian Institution Building, the Castle, is bordered on the east by the Arts and Industries Building and west by the Freer Gallery of Art. In the late 19th century, it was the site of small buildings for the Smithsonian Astrophysical Observatory, Taxidermy Studio, National Zoological Park, and Aerodrome Studio. After World War I, a Quonset hut
Description: The term “personal equation” came into use in the 19th century as scientists found that observers have inherent biases: some anticipate events, and some report events after they have occurred. Recognition of the problem led to a spate of personal equation instruments: some measured biases of this sort, and some reduced the effect of personal errors. Most of these
Showing results 73 - 84 of 314 for Smithsonian Astrophysical Observatory. Langley-Abbot Solar Research Program