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BELL SYSTEM TECHNICAL JOURNAL 



Fig. 6 — Prominences around the sun on Oct. 31, 1938. This image was obtained 

 with a scanning hole 0.013 inch in diameter which had 1/10 the area of that used 

 for the other photographs. 



Fig. 7- 



-A pair of prominences taken without optical filter (i.e., in white light) 

 on Oct. 3, 1938. 



