SAO Equipment Outside Smithsonian Institution Building

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Photograph of silver-disk pyrheliometers and a pyranometer outside the Smithsonian Institution Building (SIB), the "Castle," c. 1931-1940. Fifth Secretary of the Smithsonian Institution (1928-1944), Charles Greeley Abbot developed and used these instruments during his research at the Smithsonian Astrophysical Observatory.


  • Abbot, C. G (Charles Greeley) b. 1872
  • Smithsonian Astrophysical Observatory
  • Smithsonian Institution Building (Washington, D.C.)


Historic Images of the Smithsonian

Contained within

Smithsonian Institution Archives, Record Unit 7005, Box 187, Folder: 12 and Record Unit 95, Box 52, Folder: 14

Contact information

Institutional History Division, Smithsonian Institution Archives, 600 Maryland Avenue, S.W., Washington, D.C. 20024-2520,



Restrictions & Rights

No restrictions


  • Pyranometer
  • Observatories
  • Instruments
  • Inventions
  • Silver Disk Pyrheliometer


  • Photographic print
  • Object

ID Number

9772-A or MAH-9772

Physical description

Color: Black and White; Size: 8w x 10h; Type of Image: Object; Medium: Photographic print

Full Record

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