Smithsonian Report, 1908.— Abbot. 



Plate 3. 



Fig. 1 .—Sun-spot and Hydrogen i^^^i Flocculi. 



1908, June 3, 4'' 58™ kjs p. m. Scale: Sun's cliameter=0.3 iulIlt. 



Fig. 2.— Sun-spot and Hydrogen U/a) Flocculi. 



190S. June o, 51' lorn 51» p. m. Scale: Sun's dianieter=0.o iiioter. 



