Annals of the Astrophysical Observatory of the Smithsonian Institution (1900)
Washington : Government printing office · leaf 258
228 ANNALS OF THE ASTRQPHYSICAL OBSERVATORY. example, the sun-spot maximum of 1893 was greater than that of 1883 or 1906, yet the temperature curve D indicates a gradual increase of temperature for the three periods. Also the temperature had begun to fall in 1890, although sun spots were … still at the minimum; and the temperature had begun to rise in 1892, although sun spots had not yet reached their maximum. Similar discrepancies occur in other parts of the curves.
Infrared spectra · Solar radiation
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