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the continuous spectrum reflected by our
atmosphere should be greatly weakened, while
a bright line would suffer no diminution by
the high dispersion. On October 20th Lockyer,[10]
having news of the eclipse, but not of Jansen’s
observations the day after, was able to see
these lines. This was a splendid perfor-
mance, for it enabled the prominences to be
observed, not only during eclipses, but ev-
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