Sujet
Photographie
Légende
Charles Greeley Abbot, astrophysicist and Secretary of the Smithsonian, with his device: a silver-disc pyrheliometer which measures direct beam solar irradiance ca. 1913-1917
Date
01 janv. 1961
Crédit
Photo12/UIG/HUM Images
Notre référence
UMG22A56_077
Model release
Non
Property release
Non
Licence
Droits gérés
Format disponible
42.0Mo (2.5Mo) / 38.1cm x 27.6cm / 4497 x 3261 (300dpi)