Smithsonian miscellaneous collections 



VOL. 52, PL. XXXVI 



Fig. 1.— HYDROGEN FLOCCULI, PHOTOGRAPHED WITH THE Ho. LINE 

 1901, May I, 4h 48m P. M. Scale : Sun's diameter --= 0.2 meter 



Fig. 2.— HYDROGEN FLOCCULI, PHOTOGRAPHED WITH THE Hh LINE 

 1908, May I, 5I1 07m P. M. Scale : Sun's diameter = 0.2 meter 



