Smithsonian Report. 1940— McMath 



PLATE 5 



Sunspot-Type Prominences of September 7. 1939. and September 21, 1939, 



Ha SPECTROHELIOGRAMS. 



A, September 21, UW.SQni; B, September 21, 1.5h5.09ra; C, September 21, 16h58.48'»; D, September?, 16hf).25"° 

 E, September 7, 18h40.98'"; F, September 7. 20h36.81", O. C. T. 



