“A graduate student in astronomy observing sunspots with spectrohelioscope. The solar image is reflected by mirrors from the roof of the Whitin Observatory to a basement laboratory.” Wellesley College, 1939. 
(Wellesley College Archives)

A graduate student in astronomy observing sunspots with spectrohelioscope. The solar image is reflected by mirrors from the roof of the Whitin Observatory to a basement laboratory.” Wellesley College, 1939. 

(Wellesley College Archives)

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