COMPARISON-STARS. 



CX111 



For the stars from the Histoire Celeste of Lalande, the British reductions made and published 

 under the superintendence of Mr. Baily have been employed, but with some endeavor towards 

 critical scrutiny. The numbers of this catalogue are also here employed for reference. One 

 zone, however, that of 1796, March 4, seemed to give places differing so much and so uniformly 

 from other determinations of the same stars, as to render it advisable lo reduce this anew, which 

 was accordingly done. The tables of Hansen and Nissen were found to be computed with 

 entire correctness, and the only possible source of discordance to be in the declinations of the 

 fundamental stars selected from Piazzi, as the basis of the reduction. The stars chosen for 

 determining the constants anew were these : 



From Riimker's Catalogue, N s - 2353, 2383, [2404,] 2477, 2503, 2504, 2533, 2558, 2785, 

 2799, 2840, 2896, 2920, 2955, 2972, 3004, 3012, [3013,] 3016, 3023, 3047, 3097. 



From the Twelve-Year Catalogue, N os - 769, 770, [775,] 802, 804, 809. 



From Argelander's Catalogue, N- 207. 



Those of the above mentioned stars whose numbers are inclosed in brackets proved to have 

 been ill observed by Lalande, and were, consequently, excluded. The result indicates the need 

 of a correction of 2". 3 to the values given by the tables published by Prof. Schumacher, in 

 his Hiilfstafdn, and used for the preparation of Baily's edition of the Histoire Celeste. The 

 average correction to Lalande's declinations for other zones at the same altitude is 3".l, if 

 Bessel be the standard. 



Comparison- Stars from Lalande. 



