AT THE OBSERVATORY, CAMBRIDGE, MASS. 



DECEMBER 17, 1849 Continued. 



457 



DECEMBER 18, 1819. 



h. m. s. 



Mean 35 45.00 



Chronometer fast . . . 55.23 



Sid. time 34 49.77 



Ext. ther. 22. 



A S. Micr. 



&quot; Rev. 



1 6.58 56.810 



0.06 Zero, 50.016 



1 6.52 6.794 



Observer, G. P. B. 



No. of 

 obs. 



DECEMBER 31, 1849. 



h. TO. S. 



Mean 30 0.00 



Chronometer fast . . . 56.02 



Sid. time . . 29 3.98 



A S. Micr. 



&quot; Rev. 



46.45 54.750 



0.01 Zero, 50.010 



46.44 4.740 



No. of 

 obs. 



A &amp;lt;5. 



Micr. 

 Rev. 

 55.221 



ft. m, s. 



Mean 2 37 10.40 51.07 



Chronometer fast . . . 56.02 0.01 Zero, 50 010 



Sid. time 236 14.38 051.06 5.211 



Ext. ther. 48. Observer, G. P. B. 



58 



No. of 

 obs. 



