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    		• Abbot, C. G.
     
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    		• South Yard
     
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    		• Scientific apparatus and instruments
     
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    		• Instruments
     
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    		• Solar radiation
     
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    		• Solar energy -- Research
     
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    		• Astrophysicists
     
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    		• Pyrheliometers
     
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    		• Observatory equipment
     
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    		• Secretaries
     
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    		• Astrophysics
     
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    		• Solar energy
     
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    		• Secretariats
     
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    		• Silver Disk Pyrheliometer
     
     
    Secretary Charles G. Abbot Reading the Pyrheliometer
     
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    Catalog: 
    Historic Images of the Smithsonian
    Title: 
    Secretary Charles G. Abbot Reading the Pyrheliometer
    Date: 
    c. 1940
    Contained In: 
    Smithsonian Institution Archives, Accession 90-105, Box 1, Folder: Abbot, C. G.
    Summary: 
    In the South Yard behind the Smithsonian Institution Building , the Fifth Secretary (1928-1944) of the Smithsonian Charles G. Abbot is taking a reading from a pyrheliometer. Charles G. Abbot was an astrophysicist and patented the pyrheliometer in 1941. A pyrheliometer is an instrument for measuring the sun's radiant energy that is received on the earth.
    Usage: 
    Restrictions: No restrictions
    Physical_Description: 
    Number of Images: 1; Color: Black and white; Size: 7.9w x10h; Type of Image: Person Medium: Photographic Print
    Negative Number: 
    SIA2007-0180
    Ordering Information: 
    For permission to reproduce or publish, contact osiaref@si.edu or call 202-357-1420. To order reproductions, call 202-633-1933 or contact photos@si.edu.
    Digital Reference: 
    Images
    Digital Copies: 
    SIA2007-0180.tif 400 dpi
    Subject: 
    Abbot, C. G. (Charles Greeley), b. 1872
    South Yard
    Scientific apparatus and instruments
    Instruments
    Solar radiation
    Solar energy -- Research
    Astrophysicists
    Pyrheliometers
    Observatory equipment
    Secretaries
    Astrophysics
    Solar energy
    Secretariats
    Silver Disk Pyrheliometer
    Contact Information: 
    Institutional History Division, Smithsonian Archives, 600 Maryland Avenue, SW, Washington, D.C. 20024-2520, SIHistory@si.edu
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    Historic Images of the SmithsonianAdd Copy to MyList

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