340 



Comparison of Lalande's Observations with Ephemeris VIL 



Date, 1795. 

 Mean Time, Paris. 



Lalande's Two Observations. 



Correction 

 of Ephemeris VII. 



R. A. 



Deo. 



R. A. 



Dec. 



h. m. s. 



May 8th, 11 10 57 



May 10th, 11 2 55 



213 4l' 3.89 

 213 38 5.16 



— 1135 4.96 



— 1134 5.64 



+ 141.1 



+ 147.8 



+ 39.5 

 + 36.4 



Observed two days' motion 

 Computed do. Elem'ts VII. 



Discrepancy 



— 178".73 



— 185" .42 



+ 59."32 

 + 62."38 





6."69 



3."06 







The small residual discrepancy of 3' is to be ascribed to the ne- 

 glect of the perturbations for the interval of 52 years, and to the 

 small errors of Elements VII. 



Yours truly and respectfully, 



SEARS C. WALKER. 

 To Dr. R. M. Patterson, 



Vice President Am. Phil. Soc. 



