AT THE OBSERVATORY, CAMBRIDGE, MASS. 



NOVEMBER 30 and 31, 1849 Conttnned. 



449 



A a co?. &amp;lt;5. Micr. No. of 



ft. m. s. i a Rev. obs. 



Mean . . . . 10 18 39.60 3 42.48 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. S. Micr. No. of 



h. m. s. i n Rev. obs. 



Mean . . . . 10 38 24.50 4 48.43 20.670 



Chronometer fast 1321.00 0.15 Zero, 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. s. 

 Mean 11 48 26.09 



Chronometer fast 57.08 



Sid. time 11 47 29.01 



Ext. ther. 17. 



A a cos. &amp;lt;J. Micr. 



a Rev. 



3 55.18 25.900 



0.21 Zero, 50.000 

 3 55.97 24.100 



Observer, G. P. B. 



No. of 

 obs. 



DECEMBER 13 and 13, 1849. 



Remarks. 



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

 1&quot;. 80 for the true value. 



Observer, G. P. B. 



h. m. s. 



Mean 10 28 42.11 



Chronometer fast 56.40 



Sid. time . . 10 27 45.71 



A a cos. &amp;lt;5. 



Micr. 

 Rev. 

 39.124 



2 4G.57 



0.09 Zero, 49.998 



2 46.48 10.874 



No. of 

 obs. 



