xxvin.] CONNECTION OF PHENOMENA. 419 



There is the strictest relationship of intensity between the 

 action going on in a spot and its associated prominence, so much 

 so that when there is any very violent change indicated in a 

 spot on the disc the associated metallic prominence is at times 

 seen bright upon the sun. In this case there is little doubt that 

 the prominence is an up-rush pure and simple. 



But we can go further than this. 



FIG. 124. Diagram summarising the results of the Italian observations for the 



years 1881-83. 



6. By the hypothesis, if any phenomena caused ly falls occupy 

 any special zone on the sun, the associated ascending phenomena 

 should le limited to the same zone at the sam-e time. 



Now the most general phenomena are : 



Pores replied to by . . Domes. 



Veiled spots . . ,, ,, Metallic strata. 



Quiet spots . . Quiet prominences. 



These first three are seen in every part of the sun's surface. 

 But when we come to : 



Disturbed spots . replied to by . . Metallic prominences, 



E E 2 



