Secretary Abbot with Solar Equipment

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Astrophysicist and fifth Secretary of the Smithsonian Institution (1928-1944) Charles Greeley Abbot with his harmonic analyzer developed to discover and evaluate periodicities in solar variation. Abbot is seen here sitting at a desk with the instrument in front of him. There are charts of "solar variation" on the wall in front of him.


  • Abbot, C. G (Charles Greeley) b. 1872
  • Smithsonian Astrophysical Observatory


Historic Images of the Smithsonian


There are several other photos of instruments in SIA RU 7005, Bx 187, F: 12.

Contained within

Smithsonian Institution Archives Record Unit 7005 Box 187 Folder 12

Contact information

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

Restrictions & Rights

No restrictions


  • Secretariats
  • Astrophysics
  • Instruments
  • Secretaries
  • Inventions
  • Harmonic analysers


  • Photographic print
  • Person, candid

ID Number


Physical description

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

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