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Individual Observations of the Lines Widened in Sunspot Spectra Made at the Solar Physics Observatory, South Kensington, During the Period November 12th, 1879, to December 31st 1897

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Individual Observations of the Lines Widened in Sunspot Spectra Made at the Solar Physics Observatory, South Kensington, During the Period November 12th, 1879, to December 31st 1897

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