AT THE OBSERVATORY, CAMBRIDGE, MASS. 



DECEMBER, 28, 1849 Continued. 



443 



Mean by first wire 

 Chronometer fast , 

 Sid. time 



h. m. s. 

 2 4 24.50 

 58.78 

 2 3 25.72 



A a. 



12.70 



No. of 

 obs. 



20 



DECEMBER 29 and 30, 1849. 



Remarks. 



Two stars (a and J) were used at IU. 20m.; a was north of Mars north limb by 4 , and b by 3 . 



Observer, W. C. B. 



A. m. s. 



Mean by first wire . 11 44 3.36 

 Chronometer fast . . 59.05 



Sid. time . 11 43 5.31 



No. of 

 obs. 



18.28 



A. m. e, 



Mean by second wire . 11 44 16.48 

 Chronometer fast . . 59.05 



Sid. time ... . 11 43 17.43 



A a. No. of 

 s. obs. 



21 



