AT THE OBSERVATORY, CAMBRIDGE, MASS. 



DECEMBER 31, 1849. 



451 



a cos. 



Micr, No. of 



a cos. I. 



Micr. No. of 



h. in. s. 



Rev. 



oils. 



Mean .... 31 25.40 1 26.00 58.810 



Chronometer fa>t 59.18 0.07 Zero, 50. 035 



Sid. time . . . 03023.22 125.93 8.77J 5 



A. m. s. Rev. 



Mean . . . . 44 34.66 1 7.72 56.843 



Chronometer fast 59.18 0.06 Zero, 50.035 



Sid. time . . . 04335.48 1 7.66 6.808 



obs. 



Ext. thcr. 18. Observer, G. P. B. 



JANUARY 6, 1850. 



A. m. a. 



Mean 1 941.50 



Chronometer fast 1 1.09 



Sid. time 18 40.41 



A a co.. .?. 



Micr. 

 Rev. 

 55.360 



52.27 

 - 0.05 Zero, 50.026 



52.22 



5.334 



Observer, G. P. B. 



No. of 

 obs. 



20 



A. m. s. 



Mean I 53 25.92 



Chronometer fast ] 1.09 



Sid. time 1 52 24.83 



A a cos. 3. 



i n 



25.11 



0.02 Zero, 50.026 



Micr. 



Rfv. 



47.464 



No. of 

 obs. 



25.09 



2.562 



E. thcr. 17. 



