[Article] The variable sun, By C.G. (Charles Greeley) Abbot | Harper's Magazine

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[Article]

The variable sun

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20th century Astrophysics Bolometer C.G. (Charles Greeley) Abbot Mount Wilson Observatory (Calif.) Observations Plants, Effect of solar radiation on Research S.P. (Samuel Pierpont) Langley Smithsonian Astrophysical Observatory (Washington, D.C.) Sun

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