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[Hydrogen prominences] [art original] / [H.R. Butler]
Series of 5 paintings depicting the prominences of the chromosphere of the sun. These were originally displayed on the west wall of the Pro-Astronomic Hall (and intended to be installed in the proposed Hall of Astronomy) along with two similar paintings, depicting the prominences observed during the eclipse of 1918, the "Heliosaurus" and the "Eagle."