THE ORBIT OF NEPTUNE. 55 



depended on the positions of the Nautical Ahnanac stars. For the years 1846-47, 

 the Nautical Almanac right ascensions require the constant correction — O'.OOo, 

 and in 1848-49 the correction +0''.049, to reduce them to those adopted. 



The declinations do not seem so easily reducible to our adopted standard. 

 They are, therefore, not included. 



All the Washington, and some of the Paris and Albany, observations having 

 been compared witli Walker's Ephemeris in years subsequent to 1855, the fol- 

 lowing corrections have been applied for differences of Ephemerides : 



To Pari 



s Corrections. 





Date. 



R.A. 



Dec. 



1856, Sept. 14, 



+ 0.54 



+ 4.68 



Oct. 25, 



+ 0.65 



+ 5.75 



1857, Sept. 19, 



+ 0.676 



+ 5.02 



Oct. 25, 



+ 0.80 



+ 5.82 



Dec. 14, 



+ 0.80 



+ 5.92 



To Washington and Albany Corrections. 



Date. R. A. Dec. 



1861, Oct. 



29, 



+ 0.76 



+ 5.5 



Dec. 



16, 



+ 0.70 



+ 4.9 



1862, Aug. 



25, 



+ 0.90 



+ 6.3 



Sept. 



21, 



+ 0.85 



+ 6.2 





23, 



+ 0.85 



+ 6.2 



Oct. 



31, 



+ 0.76 



+ 5.4 



Nov. 



14, 



+ 0.75 



+ 5.0 



Dec. 



12, 



+ 0.70 



+ 5.1 





17, 



+ 0.70 



+ 5.1 



1863, Sept. 



27, 



+ 0.845 



+ 5.9 



Oct. 



13, 



+ 0.81 



+ 5.6 



Nov. 



6, 



+ 0.78 



+ 5.3 





12, 



+ 0.77 



+ 5.5 



Dec. 



8, 



+ 0.73 



+ 5.2 





14, 



+ 0.73 



+ 5.2 



1864, Aug. 



7, 



+ 0.91 



+ 6.2 



Sept. 



29, 



+ 0.87 



+ 6.0 



Nov. 



9, 



+ 0.90 



+ 5.9 





17, 



+ 0.88 



+ 5.5 



Dec. 



14, 



+ 0.82 



+ 5.8 





20, 



+ 0.82 



+ 5.5 



