AT THE OBSERVATORY, CAMBRIDGE, MASS. 

 DECEMBER 18 and 10, 1849. 



437 



Remirks. 



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 0', instead of its 

 true value, 170 55' ; the Right Ascension differences will therefore require a small corrcclion. 



Mean by first wire 

 Chronometer fast 

 Sid. time . . . 



h. m. >. 

 11 49 39.90 

 55.23 

 11 48 31.67 



A a. 



27.51 



No. of 

 obs. 



24 



A. m. s. 



Mean by second wire . 11 49 40.86 

 Chronometer fast . . 55.23 



Sid. time . . 11 48 45.63 



A a. 



27.59 



No. of 

 obs. 



24 



DECEMBER HI, 18419. 



Remarks. 



The star at O/i. 30m. is south of Mars' f out!) limb by 47" 

 Observer, C. P. B. 



Mean by first wire 

 Chronometer fast . 

 Sid. time . . . 



A. fn. i. 



II 15.43 



56.02 

 13 19.41 



An. 



51.06 



No. of 

 oba. 



18 



A. m. >. 



Mean by second wire . 01429.21 

 Chronometer fast . . 56.02 



Sid. lime 13 33.22 



A a. 



51.02 



No. of 

 obs. 



18 



