DECLINATIONS OF CERTAIN NORTH I'OLAR STARS I95 



ure the places obtained and combining them with arbitrary 

 weights as follows : 



Ccfhci 147 Hs. ] (W. D. + 2 W. R. + E. D.) for declina- 

 tion above pole, combined with equal weight with position 

 below pole. 



Cephci 149 Hs. \ (2 W. D. + W. R. + E. R.) for declina- 

 tion above pole, and then treated like preceding star. 



Caniclop. s 664. Mean of the four positions above pole. 



Urs. inin. 33 Hs. \ (W. D. + E. D.) for position below pole, 

 combined with half weight with observations above pole. 



£ Urs. mm. W. D. below pole combined with ^ weight with 

 the mean of the remaining observations. 



In Table II in comparing the stars of the list with the zero 

 stars observed on the same night, differential flexure was ap- 

 plied. No attempt has been made to give weights to the means 

 depending on the number of zero stars employed. The final 

 declinations obtained by the two methods are found to agree 

 closely. 



Table III gives a summary of the observed declinations to- 

 gether with the declinations given in Newcomb's " Fundamental 

 Catalogue of Stars," and those given in the Berliner Jahrbuch 

 for 1900, so far as the observed stars are found in either cata- 

 logue. The Berliner Jahrbuch for 1906 gives also in the ap- 

 pendix definitive corrections to the places as given in the main 

 catalogue. The last column of Table III has been formed by 

 adding these corrections to the catalogue places, and reducing 

 from 1906 to 1900, employing the Berliner Jahrbuch values 

 for precession without including proper motion. In the first 

 column of observed declinations the five values obtained, as 

 described above, from incomplete sets of observations are 

 bracketed. 



University of Michigan, 

 Anx Arbor, May, 1904. 



