162 SPECIAL RESULTS IN THE URANOLOGICAL PORTION 



Remarks : by Fr. Argelander. 



Zero, in the column of minimum, denotes that the star 

 is then fainter than the 10th magnitude. For the sake of 

 indicating, in a convenient and simple manner, the smaller 

 variable stars, which for the most part have neither names 

 nor other designations, I have permitted myself to attach 

 letters to them ; and as the greater part of the Greek and 

 small Latin alphabets have been already employed by 

 Bayer, I have taken capital letters. 



Besides the stars given in the table, there is an almost 

 equal number which are surmised to be variable because 

 different observers have assigned to them different mag- 

 nitudes. But as such estimations were only occasional, 

 and not made with great precision, and as different ob- 

 servers follow different principles in the estimation of 

 magnitudes, it seems safer not to include such stars until 

 a decided variation in them at different times shall have 

 been found by the same observer. This is the case with 

 all the stars given in the above table, and the fact of their 

 change of light is well assured, even where no determination 

 of its period has yet been possible. The periods assigned 

 rest, for the most part, on my own investigations and ex- 

 aminations, both of older published observations, and of 

 those made by myself and still unprinted which extend 

 over more than ten years. The exceptions will be stated 

 in the following notices. 



In these notices the positions are for 1850, and are ex- 

 pressed in Eight Ascension and Declination. The often- 

 employed expression, gradation, signifies such a difference 

 of brightness as can be securely recognised, either with the 



