AT THE OBSERVATORY, CAMBRIDGE, MASS. 



JANUARY 10 and 11, 1850. 



447 



Remark*, 



The star is south of Mars, and is the same as used for micrometer measurements of the 10th p. M. 



Observer, W. C. B. 



h. m. s. 



Mean by first wire 10 12 53.55 



Chronometer fast 1 0.70 



Sid. time . 10 11 52.85 



A a. 



16.14 



No. of 

 obs. 



