Columbia subject headings:
American Philosophical Society. Library--Catalogs.
Astronomers--United States--Biography.
Astronomy--United States--History--19th century--Archival resources.
Geophysicists--United States--Biography.
Geophysics--United States--History--19th century--Archival resources.
Libraries--Special collections--Astronomy--Catalogs.
Libraries--Special collections--Geophysics--Catalogs.
Harvard subject headings:
American Philosophical Society. Library--Catalogs.
Astronomers--United States--Biography
Astronomy--Bibliography
Astronomy--United States--History--19th century--Manuscripts--Catalogs.
Geophysicists--United States--Biography.
Geophysics--Bibliography
Geophysics--United States--History--19th century--Manuscripts--Catalogs.
Libraries--Special collections--Astronomy
Libraries--Special collections--Geophysics
Princeton subject headings:
American Philosophical Society. Library--Catalogs.
Astronomers--United States--Archival resources.
Astronomers--United States--Biography.
Geophysicists--United States--Archival resources.
Geophysicists--United States--Biography.