Description: On January 24, 1925, for the first time in over a century, a total solar eclipse would be visible across the northern part of the United States. How scientists used a dirigible to observe the phenomenon.
Description: The Smithsonian Institution Building, or Castle, was designed by architect James Renwick, Jr. Construction began in 1847 and was finished in 1855. The statue in front of the Castle, which is visible in many of these postcards, is of Joseph Henry, who was the first Secretary of the Smithsonian. The postcards in this gallery provide exterior views of the Castle.