Annals of the Astrophysical Observatory of the Smithsonian Institution (1900)
Washington : Government printing office · leaf 251
1913.9 radiation as a whole, and not for particular wave lengths. Let us further suppose that all the drift curves so obtained during 1913 and 1914 were reduced to unit intensity at the center of the solar disk. We should then find, still confining ourselves to a consideration of the short- period… … Fig. 29.— Variations of solar constant and solar contrast in 1914.9 The results of 1914 indicate a larger ratio of change of contrast compared to change of solar constant than those of 1913. This may be possibly a real difference caused in the sun, but it should be noted that the range of variation…
Infrared spectra · Solar radiation
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