AT THE OBSERVATORY, CAMBRIDGE, MASS. 



DECEMBER 11, 1849 Continued. 



457 



DECEMBER 18, 1840. 



A. m. s, 



Mean 35 45.00 



Chronometer fast . . . 55.53 



Sid. time 34 49.77 



Ext. ther. 22*. 



A S. Micr. 



' " Rev. 



1 6.58 56.810 



0.06 Zero, 50.016 



1 6.52 6.794 



Observer, G. P. B. 



No. of 



OD8. 



DECEMBER 21, 184-9. 



h, m. s. 



Mean 30 0.00 



Chronometer fast . . . 56.02 



Sid. time . . 29 3.98 



A S. Micr. 



' " Rev. 



46.45 54.750 



0.01 Zero, 50.010 



46.44 4.740 



No. of 

 obs. 



A I. Micr. 



ft. in. s. Rev. 



Mean 2 37 10.40 51.07 55.221 



Chronometer fast . . . 56.02 0.01 Zero, 50 010 



Sid. time . . 23614.38 051.06 5.211 



58' 



F.xt. thor. 48". Observer, G. P. B. 



No. of 

 obs. 



