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The Magnetic Observatory at the Girard College [graphic] / S. Rufus Mason.

Grumblethorpe, observatory. [graphic].

Transit instrument in the observatory, [Haverford College] [graphic].

Franklin and Marshall Institute, Lancaster.

Swarthmore College, Swarthmore, Pennsylvania.

Swarthmore College, Swarthmore, Pennsylvania.

Observatory, Haverford [College] [graphic].

The Magnetic Observatory at the Girard College.

Views of Chatham Island, South Pacific during United States Transit of Venus expedition.

Views in Fairmount Park Philadelphia, 1884 [graphic] / IHM.