102 



OPPOSITION OF MARS, 1851-52, 



Remarks. 



Images sharp and steady, and measures satisfactory. The line bounding the white zone not so dark as when last observed. Dark patches visible 

 on the south preceding quadrant. 



a Evidently in error, and therefore rejected. 



Results. 



Mean S. F. 

 Mean N. P. 



Twenty transits 

 Twenty-one transits 



h. m. 



Correction for chronometer at 8 1 . 

 Correction for chronometer at 8 1 . 



h. m. s. 

 . 8 35.54 

 . 8 42.12 



m. s. 

 . 1 50.20 

 . 1 50.20 



m. s. Rev. 



+ 37.345 .... 5.447 

 + 36.167 . . . . 4.583 



= 1 46.16 

 = 1 29.32 



A P. F. limbs in A. R. reduced to arc . . . 17.67 



Variation of A. R in 7s 0.03 



Observed P. F. diameter 17.64 



h. m. 

 A f at 7 58 . 



0.09 



h. m. s. 



Santiago sid. time S. F - . . 7 58 45.34 



Santiago sid. time N. P 75851.92 



Interval 6.58 



A N. S. limbs micr. in rev 0.864 = 16.84 



Variation ot declination in 7s 0.02 



Corr. for diain. of micr. wires .... 2.20 



Observed N. S. diameter 14.62 



h. m. 

 A f> at 7 58 0.07 



