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Spectroscopic Notes*


SPECTRUM OF A SOLAR SPOT, APRIL 9, 1870, P.M. EXAMINED the spectrum of a large group of spots a little north and east of the sun's centre. The nucleus of the most southerly member of the group reversed the C line finely, turning it into a conspicuous bright line for about 20″ of its length, without any distortion, however, such as is common upon this (dark) line in the neighbourhood of spots.

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YOUNG, C. Spectroscopic Notes*. Nature 2, 338 (1870).

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