Abstract
THE CALORIFIC RADIATION OF THE SUN.—Further results relating to the intensity of the solar calorific emissions are published in No. 17 of the Comptes rendus by MM. Millochau and Féry. Using the instrument described in their former note, and considering only the centre of the solar disc, they obtained measures at Meudon (altitude= 150 m.), Chamonix (altitude= 1030 m), and the summit of Mont Blanc (altitude=4810 m.). Accepting the emissive power as being equal to unity, these gave 4820°, 5140°, and 5560°, respectively, when standardised by the electric furnace. All these measures were obtained when the sun was near the zenith, and the observers give a table showing the hourly variation of the apparent temperature from 8 am. to 6 p.m.
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Our Astronomical Column . Nature 75, 40–41 (1906). https://doi.org/10.1038/075040a0
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DOI: https://doi.org/10.1038/075040a0