PLATE XTV. 



This photograph, which shows the hydrogen tlocculi sun'oundlng the si)ot 

 group, should be coini»ared with tig. 1, Tlate X. The brighter regions are in most 

 cases eruptive. In general, tlie liydrogen tlocculi in the less disturbed regions 

 ;ire dark, tliongh they may perha])s be bright or nt^itral where they overhang the 

 penumbra, aud cover some of the smaller sitots of the group. 



159 



