AT THE OBSERVATORY, CAMBRIDGE, MASS. 



439 



DECEMBER 2T, 1849 Continued. 



Remarks. 



Four stars of comparison were u=ed on this night: a = 13 mag., 1 south of Mars cpntre at U. 40m. ; f&amp;gt; = 7.8 mag., Bessel 405; c = 8.9 mag., 2 north 

 of Mars ; d = 13 mag. ? 3 south. The star a was best situated and was most observed, but it was too faint to be well observed. 



Observer, W. C. B. 



Mean by first wire 

 Chronometer fast . 

 Sid. time 



A. m. . 



9 26. 30 



58.28 



8 28.02 



A a. 



18.03 



No. of 

 obs. 



h. m. s. 



Mean by second wire . 937.06 

 Chronometer fast . . 58.28 



Sid. lime 08 38.78 



A a. 



18.02 



No. of 

 obs. 



Mean by first wire 

 Chronometer last . 

 Sid. time 



h. m. s. 

 57 25.2-2 

 58.28 

 56 26.94 



No. of 

 obs. 



49.12 



h. m. $. 



Mean by second wire . 57 39.97 

 Chronometer fast . . 58.28 



Sid. time . 55 41.69 



A a. 



49.54 



No. of 

 obs. 



Mean by first wire. 

 Chronometer fast . 

 Sid. time 



h. m. t. 

 1 2 29.12 

 58.28 

 1 1 30.24 



No. of 

 obs. 



39.68 



h. m. s, 



Mean by second wire . 1 2 43.90 

 Chronometer fast . . 58.28 



Sid. time . 1 1 45.62 



39.42 



No. of 

 obs. 



13 



Mean by first wire 

 Chronometer fast . 

 Sid. time . . 



h. m. t. 

 57 19.95 

 58.28 

 56 21.67 



1 6.31 



No. of 

 obs. 



14 



h. m. s. 



Mean by second wire . 57 39.97 

 Chronometer fast . . 58.28 



Sid. time . 05641.69 



1 6.10 



No. of 

 obs. 



15 



