AT THE OBSERVATORY, CAMBRIDGE, MASS. 



DECEMBER 31, 1849. 



459 



JANUARY 1, 185O. 



A*. 



r // 



Micr. No. of 

 Rev. ob*. 

 49.660 



A. 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 9 



Ext. ther. 18. 



& 1. Micr. No. of 



A. m. t. ' " Rev. obs. 



Mean .... 2 7 32.50 32.25 53.325 



Chronometer fast 59.37 0.02 Zero, 50.034 



Sid. time ... 2 633.13 032.33 3.291 2 



Observer, W. C. B. 



JANUARY *, 1850. 



Kit. ther. 24'. 



No. of 



