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nences showed a bright line spectrum, indi-
cating the presence of hydrogen and other
gases. So bright was it that Jansen ex-
˜
claimed: ” Je verrai ces lignes-lA en dehors
˜
des Aclipses .” And the next day he ob-
served the lines at the edge of the uneclipsed
sun. Huggins had suggested this observa-
tion in February, 1868, his idea being to use
prisms of such great dispersive power that
481