\ i inn ION OB ; u:\ \ rORI . 



II 



field was determined to be 1976 .(>:>. The same eye-piece has been employed in all ihc 

 cometary observations. 



The following table shows the true right ascensions and declinations ol the .-t. 

 comparison for the dates ol' observation, according to several authority I 

 observations are found in the Histoire Celeste, pp. 34, 38, 192 and 194. Besscl's 

 from Zones 332, 394, and 506. I have also observed all the stars on the meridian with 

 the transit circle, most of them repeatedly, and the results are given below. The num- 

 bers contained in the last column, are the places actually employed in reducing the ob 

 vations of the comet. 



The observations were corrected for the (Ufferend of refraction between the com< t and 

 star of comparison, by means of the formula? 



Correction in A. R. - 2 r A sin v cos v sec 5 

 ( lorrection in Dec = >■ A cos v 

 Where /• — the difference of refraction for 1' at the given altitude 

 A — the difference of declination of the two objects. 

 v = the angle of variation. 



ft = the mean of the declinations of the star and comet. 

 The places in column fifth arc corrected for refraction, parallax and 

 tin- last column exhibits the corrections of Encke's ephemeris according 

 tions. 



aber 



to tl 



ration, and 



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