Annals of the Astrophysical Observatory of the Smithsonian Institution (1900)
Washington : Government printing office · leaf 85
er much from the standard desired, it is a part of our requirements of the observers at any station that they shall keep these ratios as constant as possible at their original figures by refocusing the spectroscope, or slightly altering the time of swing of the galvanometer, if necessary. As these… … Fig. 10. — Normal pyranometry, Table Mountain. Turning now to pyranometer excess, we quote as follows from Annals, volume 5, pages 115-116: If the atmosphere were tranquil, and neither cleansing rains, polluting fires, high winds, nor other disturbances occurred to alter its dustiness, then the sky…
Infrared spectra · Solar radiation
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