AT THE OBSERVATORY, CAMBRIDGE, MASS. 



439 



DECEMBER 2T, 1849 Continued. 



Remarks. 



emars. 



Four stars of comparison were ued on this night: a = 13 mag-, 1' south of Mars' crntre at 1A. 40m ; ft = 7.8 mag., Bessel 405; c = 8.9 mag., 2' north 

 of Mars ; d = 13 mig. ? 3' south. The star a was best situated and waj most observed, but it was too faint to be (Veil observed. 



Observer, W. C. B. 



Mean by first wire 

 Chronometer fast . 

 Sid. time 



9 86. SO 



58.28 



8 28.02 



A a. 



18.03 



No. of 

 obs. 



h. m. 8. 



Mean by second wire . 937.06 

 Chronometer fast . . 58.28 



Sid lime . .08 38.78 



18.02 



No. of 

 obs. 



Mean by first wire 

 Chronometer last . 

 Sid. time 



A. m. f. 



57 25.22 



58.98 



56 8.94 



An. 



49.12 



No. of 

 obi. 



15 



h. tn. *. 



Mean by second wire . 57 39.97 

 Chronometer fast . . 58.28 



Sid. time . . . . 05841.69 



A a. 



49.54 



No. of 

 obs. 



15 



Mean by first wire. 

 Chronometer fast . 

 Sid. time . . . 



A. m. f . 

 1 929.12 

 58.28 

 1 1 30.24 



39.68 



No. of 

 obs. 



13 



A. m. it 



Mean by second wire . 1 2 43.90 

 Chronometer fast . . 58.28 



Sid. time .... 1 1 45.62 



A a. 



39.42 



No. of 

 obs. 



13 



Mean by first wire 

 Chronometer fast . 

 8id. time . . . 



A. m. t. 

 57 19.95 

 58.28 

 56 21.67 



No. of 

 obs. 



1 6.31 



A. m. f . 



Mean by second wire . 57 39.97 

 Chronometer fast . . 58.28 



Sid. time . . . . 05641.69 



A a. 

 m. t. 



1 6.10 



No. of 

 obs. 



15 



