Further study of the solar corona

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Abstract
IT was one of the proposed objects of the U. S. Eclipse Expedition to West Africa, in December, 1889, to make an effort to secure some photographs of the Solar Oorona.on a large scale, in order that certain measurements might be taken which would test fully the validity of the equation that I have assigned to the coronal curves.Inasmuch as we failed to obtain the desired pictures, in consequence of the clouds that prevailed during the minutes of totality, I have since my return to the United States made a series of measures upon photographs of the Ooronas of 1878, July 29, 1889, Jan. 1, and 11:$89, Dec. 22, which have been gel1erously placed at my disposal by the Superintendent of the Naval Observatory, and by the Directors of the Harvard College and the Lick Observatories respectively.I am also greatly indebted to Professor William Harkness for allowing me to use the Transit of Venus Measuring Engine, by Stackpole
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Authors F. H. Bigelow
Journal american journal of science
Year 1890
DOI
10.2475/ajs.s3-40.239.343
URL
https://doi.org/10.2475/ajs.s3-40.239.343
Keywords Keywords not found

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