Dr. Earl S. Johnston

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Earl S. Johnston of the Smithsonian Astrophysical Observatory, Division of Radiation and Organisms, working on a piece of equipment.


  • Johnston, Earl S
  • Division of Radiation and Organisms Smithsonian Insitution Building
  • Radiation and Biology Laboratory Division of Radiation and Organisms
  • Smithsonian Astrophysical Observatory Division of Radiation and Organisms


Historic Images of the Smithsonian


  • Secretary Charles Greeley Abbot established the Division of Radiation and Organisms in 1929. Its function was to investigate the effects of radiation upon living organisms, mainly plants, and the division was placed administratively under the Smithsonian Astrophysical Observatory.
  • The Division of Radiation and Organisms was located in the basement of the Smithsonian Institution Building and dedicated to studying the effects of sunlight on plants.
  • See also image numbers SIA2011-1306 and 11036F

Contained within

Smithsonian Institution Archives, Record Unit 7005, Box 186, Folder: 2

Contact information

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



Restrictions & Rights

No restrictions


  • Assistant directors
  • Observatories
  • Equipment
  • Scientific apparatus and instruments
  • Smithsonian Institution
  • Personnel management
  • Employees
  • Biophysics
  • Experiments
  • Smithsonian Institution--Employees
  • Research--Equipment and supplies


  • Photographic print
  • Person, candid

ID Number

34425 or MAH-34425

Physical description

Color: Black and White; Size: 8w x 10h; Type of Image: Person, candid; Medium: Photographic print; Number of Images: 1;

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