AT THE OBSERVATORY, CAMBRIDGE, MASS. 

 DECEMBER 17, 1849 Continued. 



457 



No. of 

 obs. 



DECEMBER 18, 1849. 



A. m. f. 



Mean 35 45.00 



Chronometer fan . . . 55.23 



Bid. time 34 49.77 



Ext. ther. 22. 



A t. Micr. 



i it An. 



I 6.58 56.810 



0.06 Zero, 50.016 

 1 6.52 6.794 



Observer, G. P. B. 



No. of 



ulis. 



DECEMBER HI, 



A. m. f. 



Mean 30 0.00 



Chronometer fast . . . 56.02 



Sid. time . . 29 3.98 



At. 

 i ii 



Micr. 

 Rev. 



46.45 54.750 



0.01 Zero, 50.010 



46.44 4.740 



No. of 

 obs. 



A. m. . 



Mean 2 37 10.40 



Chronometer fait . . . 56.02 



Bill, time 2 36 14.38 



Exl. thrr. 48. 



58 



Micr. 

 Rev. 

 55.221 



At, 



51.07 

 0.01 Zero, 50010 

 51.06 5.211 



Observer, G P. B. 



No. of 

 obs. 



