Smithsonian Report, 1908.— Abbot. 



Plate 1. 



Fig. 1.— Sun-spot and Hydrogen \Ua.} Flocculi. 

 1908, May 29, 4h 26™ p. m. Scale: Sun's diameter=0.3 mett-r. 



Fig. 2.— Sun-spot and Hydrogen (//«) Flocculi. 



1908, June 2, G'l 10" a. m. Scale: Sun's diameter=0.3 muter. 



