Results for "Expositions"

1. 

   One of the Instruments Used to Determine Sunlight Intensity and Sky Brightness

   • Date: 1930 Between 1930 and 1934

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   Expert Mechanician Making Delicate Instruments for Solar Observations

   • Date: 1930 Between 1930 and 1934

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5. 

   Carrying Water for Solar Station on Mount Brukkaros S.W. Africa

   • Date: 1920 Between 1920 and 1934

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7. 

   Mount Montezuma, Chile, Site of the Best Solar Observing Station

   • Date: 1920 Between 1920 and 1934

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9. 

   View from Solar Station on Mount Brukkaros S.W. Africa

   • Date: 1920 Between 1920 and 1934

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11. 

    Solar Cooker at Mt. Wilson, California, Cooks Food by Sun Heat

    • Date: 1920 Between 1920 and 1934

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13. 

    Solar Observing Station on Table Mountain California in Winter

    • Date: 1920 Between 1920 and 1934

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15. 

    Astrophysical Observatory

    • Date: 1909

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17. 

    Living Quarters at the Solar Station on Mt. Montezuma, Chile

    • Date: 1920

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19. 

    Astrophysical Observatory at Washington where Solar Instruments are Made and Records Studied

    • Date: 1909

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21. 

    Aerial View of Smithsonian Institution Building and Natural History Building

    • Date: 1932
    • Creator: Army Air Corps
    • Creator: Army Air Corps

22.  

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