STARS IN COMA BERENICES. 351 



For (17) ARGELANDER, 1855, the same weights .were 

 used as are given for Oeltzen-Argelander in Davis. 



The same table was assumed to apply to both right 

 ascensions and declinations. This has been the generally 

 accepted method : but my results indicate that it is not 

 always correct. On the whole, the residuals are larger in 

 right ascension than in declination. Especially is this the 

 case with the older catalogues. I have compared the prob- 

 able errors in the two coordinates obtained from the eight 

 published zones of the A. G. C. (that being my standard 

 of weight) and find a difference, which, though slight, is in * 

 the direction mentioned. A separate table of weights to be 

 used for right ascensions would therefore be desirable. For my 

 purpose, I have not deemed the additional accuracy obtained 

 thereby sufficient to compensate for the labor involved. 



(11) 



