OPPOSITION OF MARS, 1851-52. 



NAVAL OBSERVATORY, WASHINGTON. 



DECEMBER 17, 1851. 



The planet restless and indistinct no observations possi ble. 



DECEMBER 33, 1851. 



The difference of temperature between the exterior and interior of the dome (all the doors and windows being open) renders the stars so blurred 

 and indis:inct as to make observations impossible. 



DECEMBER 36, 1851. 



No certain contact with the wire could be made within half a revol ution of the micrometer. 



JANUARY 1, 1853. 



No observations possible. 



* All the comparisons at this opposition of Mars are taken with mean time chronometer 2019, Dent. 



