Observations upon the solar eclipse of July 29, 1878

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1878
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Abstract
I'HE Princeton expedition to the Rocky Mountains to observe the recent ecli pse, was organized early in the year, and its expenses were mainly provided for by a liberal appropriation made for the purpose by the trustees of the estate of the late John C. Green.I have said, mainly, because we are also greatly indebted to the kindness of the managers of the Pennsylvania, the Chicago and Alton, and Kansas Pacific Railroads, and to the Amet'ican Expt'ess Company, for the free transportation of persons and instruments, to the authorities of the State of Colomdo for the loan of camp equipage, and to the Western Union Telegraph Company for various courtesies, We are also unrler obligations to Mr. Edison, to Rutgers and Dartmouth Colleges, flnd to the observatory of Harvard College for the gift 01' loan of apparatus.Our principal object was to investigate the spectrum of the corona and chromosphere -not only the visible portion, but also, and especially, the invisible portions below the red and above the violet.It was hoped that some new lines might be discovet'ed in these portions by the help of the thermopile, photography or fluorescence, but in this respect, as will be seen, OUl' hopes were not fulfilled.Indeed we were well aware f!'Om the outset that the chances were considerably against us, and that it was quite likely, as it turned out, that the corona would sympnthize with the present general apathy of the solar surface to an extent wtlich would make the bright lines of the corona spectrum unusually faint and difficult of detection, Our party, under the charge of Professor Brackett and m.vself, consisted of ten persons when we left Princeton on July 1st.We were joined in Missouri by another, and after we went into camp at Denver by still another, making up our proper party to twelve persons.MI'.Ranyard of the Royal Astronomical Society was also with us as our guest, and observed from our camp, and on the day of the eclipse we were assisted by seveml volunteers who came out from the eity for the occasion.Arriving in Denver on July 5th, we went into camp on the 7th in a grove on the bank of Cherry Creek about two and a half miles Routheast of the city, Our position was determined by a triangulation made by Messrs. Libbey and McNeill, connecting us with several well determined points in the city.
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Authors C. A. Young
Journal american journal of science
Year 1878
DOI
10.2475/ajs.s3-16.94.279
URL
https://ajsonline.org/article/63566.pdf
Keywords Keywords not found

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