AT THE OBSERVATORY, CAMBRIDGE, MASS. 



DECEMBER 88, 1849 Continued. 



443 



Mean by first win; 

 Chronometer fast . 

 Sid. time . . . 



A. m. s. 

 2 4 24.50 

 58.78 

 2 3 25.72 



A a. 

 j. 



12.70 



No. of 

 obs. 



20 



DECEMBER 89 and 30, 1849. 



Remarks, 



Two stars (a and i) were used at HA. 20m.; a was north of Mars' north limb by 4', and J 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 



A a. 



s. 



18.28 



No. of 

 obs. 



21 



A. m. e, 



Mean by second wire . 11 44 16.48 

 Chronometer fast . . 59.05 



Sid. time 11 43 17.43 



A o. 



17.88 



No. of 

 obs. 



21 



