THE OllBIT OF URANUS. 109 



Declination. 



The discordance of the clock corrections makes a satisfactory determination of 

 the right ascension very difficult. I deem it best to reject the doubtful observa- 

 tion of 17 Virginis, and the discordant one of x Virginis. The result will then 

 be 



h. m. i. 



Observed transit of Uranus, 8 50 44 



Correction for clock and instrument, 2 24 17.6 



Observed right ascension of Uranus, 11 15 1.6 



Declination. 

 Z. D. R. Doc. Eq. Pt. 



o Leonis, 43 52 1 40" +0 7 55" 7 34' 51" 51 28' 26* 



Uranus, 45 45 30 -j-0 59 



v Virginis, 43 20 20 -j-0 54 8 7 11 51 28 25 



17 Virginis, 44 34 10 -f 56 6 53 33 51 28 39 



x Virginis, 60 23 5 +1 41 8 55 42 51 28 64 



Circle reading for Uranus, 45 46' 29" 



Mean equatorial point, 51 28 38 



Observed declination of Uranus, +5 42 9 



The next observations in the order of time are two by Bradley, discovered by 

 Mr. Hugh Breen, but still unpublished. The following are the results as given 

 by Mr. Breen in the Aetronomiache NachricJiten, No. 1463. 



Mean Time. R. A. N. P. D. 



h. m. . h. m. t. " 



1748, October 21, 7 6 18.4 21 4 37.93 107 29 



1750, September 13, 10 8 57.8 21 40 0.23 104 42 33.9 



