AT THE OBSERVATORY, CAMBRIDGE, MASS. 

 DECEMBER 18 and 19, 1849. 



437 



Remarks. 



Star is 1 north of Mars. 



Observer, VV. C. B. 



N. B. The zero of the position circle on the evening of December 18th and on the morning of the 19th, was supposed to be 180 , instead of its 

 true value, 179 55 ; the Right Ascension differences will therefore require a small correction. 



No. of 

 obs. 



27.59 



2-1 



DECEMBER HI, 1849. 



Remarks. 



The star at OA. 30m. is south of Mars south limb by 47&quot; 

 Observer, G. P. B. 



Mean by first wire 

 Chronometer fast . 

 Sid. time 



h. m. s. 

 11 15.43 

 58.02 

 13 19.41 



A a. 



51.06 



No. of 

 obs. 



18 



h. m. s. 



Mean by second wire . 14 29.21 

 Chronometer fast . . 56.02 



Sid. time 13 33.22 



51.02 



No. of 

 obs. 



18 



