36 



from the discussion of all the observations extant, exclusive of those equatorial 

 measures made with a ring micrometer, or with an undetermined star. The 

 number of days and of observations embraced in each group is 56, having the 

 middle date for the epoch. As far as practicable, each observation has been 

 used the same number of times. This restriction would not apply to the ear- 

 liest and latest groups of an uninterrupted series. 



SIXTH, AND LAST, GEOCENTRIC NORMAL CORRECTIONS OF THE EPHEMERIS, IN FIFTY-SIX DAY 

 GROUPS, HAYING EACH EIGHTH DAY FOR THE MIDDLE DATE. 









Obs.- 



-Eph. 



No. 



Obs.- 



-Eph. 



No. 





Date. 





R. 



A. 



Obg. 

 160 



Dec. 



Obs. 



1846, 



Sept. 



26 



cr 



0".21 



+ < 



)".55 



144 



a 



Oct. 



4 



— 



.11 



210 



+ 



..54 



188 



(( 



(t 



12 



— 



.29 



277 



+ 



.64 



244 



u 



ii 



20 



— 



.26 



336 



+ 



.60 



293 



u 



a 



28 



— 



.20 



349 



+ 



.53 



304 



a 



Nov. 



5 



— 



.11 



343 



+ 



.62 



297 



a 



" 



13 



— 



.04 



317 



+ 



.64 



273 



a 



" 



21 



+ 



.04 



305 



+ 



.70 



258 



a 



(( 



29 



+ 



.08 



272 



+ 



.75 



235 



a 



Dec. 



7 



+ 



.34 



209 



+ 



.69 



179 



ii 



<< 



15 



+ 



.51 



168 



+ 



.84 



148 



a 



a 



23 



+ 



.60 



132 



+ 



.95 



120 



" 



u 



31 



+ 



.95 



90 



+ 



.92 



80 



1847, 



Jan. 



8 



+ 



.79 



63 



+ 



.98 



50 



u 



April 



6 



+ 



.42 



15 





.18 



16 



u 



July 



27 



— 



.49 



53 



+ 



.16 



50 



a 



Aug. 



4 



— 



.59 



68 



+ 



.14 



65 



a 



ii 



12 



— 



.58 



81 



+ 



.15 



75 



it 



" 



20 



— 



.64 



76 



+ 



.19 



71 



ii 



ii 



28 



— 



.76 



83 



+ 



.40 



76 



a 



Sept. 



5 



— 



.61 



76 



+ 



.31 



83 



ii 



<( 



13 



— 



.58 



76 



+ 



.46 



80 



(( 



ii 



21 



— 



.71 



61 



+ 



.48 



67 



(t 



" 



29 



— 



.73 



50 



+ 



.56 



57 



u 



Oct. 



7 



— 



.95 



65 



+ 



.58 



57 



" 



" 



15 



— 



.85 



65 



+ 



.76 



67 



" 



a 



23 



— 



.94 



70 



+ 



.92 



61 



ii 



u 



31 



— 



.95 



63 



+ 



.87 



65 



a 



Nov. 



8 



— 



.96 



46 



+ 



.77 



51 



ii 



ii 



16 



— 



.74 



53 



+ 



.93 



48 



ii 



ii 



24 



— 



.56 



45 



+ 



.99 



45 



a 



Dec. 



2 



— 



.24 



35 



+ 



.89 



30 



a 



ii 



10 



— 



.09 



27 



+ 



.72 



22 



ii 



" 



18 



— 



.44 



18 



+ 



.89 



18 



No. 47. I subjoin the comparison of all the standard observations extant, 

 with the *Ephemeris from Elliptic Elements II, and from Prof Peirce's Tables 



* Appendix I. to Smithsonian Contributions, Vol. II. 



