Annals of the Astrophysical Observatory of the Smithsonian Institution (1900)
Washington : Government printing office · leaf 214
e transmissibilities since with these coordinates the resulting plots are nearly linear.1 From such plots were read for each day the transmissions at air masses 3.0 and 1.2, corresponding very closely to the beginning and to the end of a day’s observa¬ tions; the calibration plot (figure 25 of the… … pheric layers concentric with the earth for a vertical column as in the actually observed column which was not vertical. These times for the determination of the vapor, namely, when the sun was at an altitude of 19° 27" and 56° 26", respectively (air masses, 3.0 and 1.2), though perhaps ill chosen…
Infrared spectra · Solar radiation
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