68 



Mean N. P. 

 Mean 8. F. 



OPPOSITION OP MARS, 1849-50, 



JANUARY 18, 1850-Coiitlnued. 



Twelve transits . 

 Twelve transits . 



h. m. 



Correction for chronometer at 5 25 

 Correction for chronometer at 5 29 



Results. 



h. m. s. 

 5 24 27.44 

 5 29 6.67 



m. s. 



3.31 

 3.32 



in. s. 



+ 3 37.905 

 + 3 38.943 



Rev. 



13.447 



14.449 



Santiago sid. time N. P. 

 Santiago sid. timeS. F. 

 Interval 



. =4 22.08 

 . =4 41.61 



h. m. s. 

 . 5 23 24.13 

 . 5 28 3.35 

 4 39.22 



A P. F. limbs in A. R. reduced to arc . . . 15.57 



Variation of A. R. in 4m. 39s +0.84 



Observed P. F. diameter 16.41 



h. m. 



A p at 5 22 , 



0.28 



AN. S. limbs micr. in rev 1.002=19.53 



Variation of declination in 4m. 39s. . 0.19 



Corr. lor diam. of micr. wires ... 2.20 



Observed N. S. diameter 17.14 



h. m. 



A f at 5 26 



0.30 



Remarks. 



Much dry haze, with light cirri, and an eitrcmcly minute star, combined to frustrate efforts to observe. There is also a difference in the observed 

 and computed R. A. of the star, amounting to more than fifteen seconds ; and we cannot examine it for want of a copy of Bessel 's Zones. 



Correction for chronometer at 5 12 



Results. 



1 6.57 



111. 6. 



4 1.580 



4 0.750 



Rev. 

 + 16.410 

 + 15.450 



Santiago sid. time N. P. 

 Santiago sid. time S. F. 

 Interval .... 



= 5 19.83 

 = 5 1.12 



h. m. s. 



4 47 32.40 



5 11 1.03 

 23 28.63 



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

 Variation of A. R. in 23m. 29s. . . 

 Observed P. F. diameter . 



h. m. 

 A p at 4 50 . 



12.45 



+ 3.29 



15.74 



0.34 



A N. S. limbs micr. in rev 0.960 = 18.71 



Variation of declination in 23m. 29s. . . 0.86 



Corr. for diam. of micr. wires ... 2.20 



Observed N. S. diameter ..'... 15.65 



h. m. 

 A (i at 5 13 . 



0.32 



