232 



COSMOS. 



established by Argelander. At the end of September, a frosh. 

 diminution of its light commenced. By October, the 'tar 

 was no longer visible in the comet-seeker, but it appeared 

 again in February, 1846, and by the beginning of June had 

 reached its usual magnitude (the 6th). Since then it has 

 maintained this magnitude, if we overlook some small 

 fluctuations whose very existence has not been established 

 with certainty. To this enigmatical class of stars belong 

 also variabilis Aquarii, and probably Janson and Kepler's 

 star in Cygnus of 1600, which we have already mentioned 

 among the new stars. 



TABLE of the Variable Stars by F. Argelander. 



