Abstract
I HAVE been following with interest the communications which have been made from time to time to Science by Mr. W. H. Pickering regarding the photography of the corona in full sunshine. Whilst admiring the manner in which he has built up his theoretical objections to its possibility, I am forced to dissent from his deduction from the fact that the theory does not fit in with the results actually obtained during the eclipses observed in Egypt and the Caroline Islands. I have in my hands at present spectrum and other photographs of the corona made during the expeditions to those localities, and from them I gather he has evidently much underestimated the photographic brightness of the corona as compared with that of the sky. As I propose shortly to read a paper before the Royal Society on the subject, I cannot enter into details at the present moment. All I will say is that the comparative photographic intensity of both can be estimated with approximate exactness from the data I have by me.
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ABNEY, W. Photography of the Corona. Nature 33, 53 (1885). https://doi.org/10.1038/033053a0
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DOI: https://doi.org/10.1038/033053a0
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