Smithsonian Report. |950.--Linclblad 



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1. Photograph of the sun in ultraviolet light, May 12, 1948, showing spot groups, 

 solar faculae, and the general decrease of intensity fr(un center to limb. 

 Stockhohn Observatory. 



2. Six'cl n)!i('liiiL;rani in I lie liy<li-Mge:i line 11 a; take!i with soect roheliograph con- 

 structed by V. r)hinan,Mi)ckli()lin ( >l)servatory, .April :i, l".»l'.). Dark fila- 

 ments, actually prominences, and several bright areas are shown. 



