122 THE CHEMISTRY OF THE SUN. [CHAP. 



replaced by an exceedingly brilliant radiation, so brilliant, 

 indeed, that it is quite impossible to draw a diagram so as to 

 give any idea of the intense brightness of some of these little 

 spots of light which one sees in the spectroscope ; they fatigue 



FIG. 56. Contortions of Fline on disc. 1 and 2, rapid downrush and increasing 

 temperature ; 3 and 4, uprush of bright hydrogen and downrush of cool hydro- 

 gen ; 5, local downrushes associated with hydrogen at rest. 



the eye enormously, although they cover such a very small 

 portion of the field of view, and with these the straight and 

 evenly-bounded image of the slit had given way to an ii regular 

 one. 



FIG. 57. Contortions of F line on disc, in connection with spots and npmshes of 



bright hydrogen. 



Accompanying this intense radiation there was a gradual 

 fading away of the absorption line ; it waned, and faded, and 

 became almost invisible ; while, on the other hand, on the other 

 side or in other places, instead of getting a brilliant patch of 



