Abstract
THAT the rainfall of certain parts of the earth tends to vary periodically with the sun-spots has been shown with considerable probability by Messrs. Meldrum and Lockyer, and Prof. Köppen* has detected a similar tendency in the temperature of the atmosphere, most distinctly shown (as might have been anticipated) at stations in the tropical zone.† These discoveries indicate that there is at least some ground for the truth of Sir W. Herschel's surmise, that the heat emitted by the sun undergoes a periodical increase and decrease, concurrently with the varying disturbance of the solar atmosphere, as evidenced by the number of spots and prominences on his surface. But except Mr. Joseph Baxendell, who has published two papers on the subject in the fourth volume of the Transactions of the Literary and Philosophical Society of Manchester (new series), I am not aware that anyone has attempted to investigate the more direct evidence afforded by observations of the black-bulb thermometer.
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BLANFORD, H. Solar Heat and Sun-Spots . Nature 12, 147–148 (1875). https://doi.org/10.1038/012147b0
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DOI: https://doi.org/10.1038/012147b0