Young, Charles A. (Charles Augustus), 1834-1908, Young, Anne Sewell, b. 1871., ed · Boston, New York [etc.] Ginn and Company · leaf 165
same substance. The hydrogen and helium lines, 1 See second note on page 160. §207] NATURE OF THE CORONA. 149 and H and K of calcium, have also been photographed as brightlines in the corona spectrum; but observations made in 1893 and1896 prove that they are caused by reflection (in our… … Fig. 59. — Corona of Eclipse of 1900, Wadesboro, N.C. presence of dark Fraunhofer lines, and these have now been photo-graphed. The corona therefore unquestionably contains some matterwhich reflects sunlight. The faint continuous spectrum which formsthe background for the bright and dark lines…
Astronomy · Constellations
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