AT THE OBSERVATORY, CAMBRIDGE, MASS. 



449 



NOVEMBER 30 and 31, 1849 Continued. 



A a cos. I. Micr. No, of 



h. m. s. ' " Rev. obs. 



Mean . . . . 10 18 39.60 3 43.48 22.298 



Chronometer fast 1321.00 0.14 Zero, 50.000 

 Sid, time . . . 10 5 18.60 3 42.34 27.702 10 



Ext. ther. 30'. 



A a cos. J. Micr. No. of 



h. m. s. ' " Rev. obs. 



Mean . . . . 10 38 24.50 4 48.43 30.670 



Chronometer fast 1321.00 0.15 Zeio, 50.000 

 Sid. time . . . 10 25 3.50 4 48.28 29.330 10 



Observer, G. P. B. 



DECEMBER 11 and 13, 1849. 



h. m. ,. 



Mean II 48 26.09 



Chronometer fast 57.08 



Sid. time 11 47 29.01 



Eit. ther. 17'. 



A a cos. (5. Micr. 



' a Ren. 



356.18 25.900 



0.21 Zero, 50.000 



3 55.97 24.100 



Observer, G. P. B. 



No. of 

 obs. 



DECEMBER 12 and 13, 1649. 



Remarks. 



The position circle for these observations was set, by inadvertence, at 183 53' instead of 180 0'. The measured distance must be diminished by 

 1". 80 for the true value. 



Observer, G. P. B. 



57' 



