STARS IN COMA BERENICES. 395 



follows : Col. I shows the Name or the B. A. C. or B. D. number 

 of the star ; 2 and 3 the Right Ascension and Probable Error in 

 Right Ascension for 1875, respectively; 4 and 5 the geometric 

 Precession and Secular Variation respectively ; 6 and 7 the Proper 

 Motion in Right Ascension and its Probable Error; 8 the mean 

 Date of Observation, T^ ; and 9 the Number of Observations 

 from which the results were obtained. Columns 10 to 17 have 

 the same significance as 2 to 9, but refer to the declination. 

 Column 18 contains Chase's number, and 19 the number as- 

 signed by me to the star in question. It should be mentioned, 

 that the declination of B.A.C. 4153 as here given does not in- 

 clude Respighi's observations of that star, which were acci- 

 dentally overlooked, as the omission was not discovered until 

 all the succeeding calculations had been made. The error in- 

 troduced thereby is so trifling, however — being only ©''.03 in the 

 position and o".ooi in the proper motion — that I have not 

 deemed it necessary to carry through the correction. The con- 

 stants of the plates, to compute which these positions are used, 

 would not be changed by doing so. I have, therefore, left the 

 quantities as they were used in the succeeding part of the work, 

 although, of course, the corrected position including Respighi's 

 observations would otherwise have been preferable. 



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