A text-book of general astronomy : for colleges and scientific schools (1888)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston ; London : Ginn & Company · leaf 210
Reversal of Spectrum screen S sia-l-p±\:—U—s ^§J/T … Fig. 109.—Reversal of the Spectrum. 315. Chemical Constituents of the Sun. — By taking advantageof these principles we can detect the presence of a large number ofwell-known terrestrial elements in the sun. The solar spectrum is crossed by dark lines, which, withan instrument of high…
Astronomy
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