AT THE OBSERVATORY, CAMBRIDGE, MASS. 

 DECEMBER 11, Is in. 



459 



JANUARY 1, 1850. 



At. 



h. m. . 



Mean . . . . 1 51 49.33 3.67 



Chronometer fast 59.37 0.00 Zero, 50.034 



Sid. time . . 1 50 49.96 3.67 0.374 



Micr. No. of 

 Rev. obs. 

 49.660 



Ext. ther. 18". 



A I. 



A.m. . ' 



Mean .... 2 7 32.50 32.25 



Chronometer fast 59.37 0.02 Zero, 50.034 



Sid. time . . . 2 6 33.13 032.23 3.291 



Observer, W. C. B. 



Micr. No. of 

 Rev. obs. 

 53.325 



JANUARY 4, 1850. 



Mean .... 

 Chronometer fait . 

 Sid. time 



h. m. >. 



1 47 59.42 



1 0.60 



1 46 58.82 



AJ. 



46.08 

 0.03 

 46.05 



Kit. ther. 25', 



Micr. 



Rev. 



45.340 



Zero, 50.032 



4.692 



No, of 

 obs. 



