xxviii.] CHANGE OF LATITUDE OF SPOTS. 421 



When and where the spots are at the maximum, the faculse 

 and the metallic prominences are at the maximum. If the 

 maximum changes from north to south, as it does, in the spots ; it 

 changes from north to south in the metallic prominences ; and 

 from north to south in the faculse. So that were we dependent on 

 these diagrams alone, representing three years' work, we should 

 be driven to the conclusion that there is absolutely the most 

 Intimate and important connection between spots, the metallic 

 prominences, and the faculse ; and not only that ; we reach finally 

 the fact of the wonderful localisation of these phenomena upon 

 the sun. The spots are never seen north or south of 40 . 1 

 They are invariably seen in smaller quantity at the equator. 

 Similarly while the domes are small all over the sun, the 

 brighter collections of them, the faculse, do not go very much 

 further than 40 north or south, and their minimum is also at 

 the equator. The metallic prominences also never go very 

 much beyond the spot region, and they also have a minimum 

 at the equator. 



But when we pass to the prominences of the quiet sort that 

 is not so. They, like the domes and the pores and the veiled 

 spots, extend from one pole of the sun to the other ; so that 

 whatever it may lead us to, we are bound to consider that there 

 is the most intimate connection between spots, metallic pro- 

 minences, and faculse, and that there is a great difference 

 between the metallic prominences and the quiet ones. That is 

 a result to have arrived at of the first order of importance. 



So far then the facts are in accord with the hypothesis, 

 and indeed the hypothesis closely connects together phenomena 

 which formerly seemed isolated. Thus, for instance, we find 

 explained the close connection between metallic prominences 

 and spots ; the entire absence of metallic prominences with rapid 



1 This requires a small qiialification. A few have been recorded in higher 

 latitudes, notably one observed by Peters in 1846 in N. L. 50, and one by 

 Carrington in July 1858 in S.L. 44, 



