168 



G. M. T. App. a App. S 



April26-541140 223°52'36"-2 - 12°3l'37"-9 Markree. 



30-569109 222 52 3-3 20 44 • I Reg. Park. 



May 5-478479 221 37 44 -7 7 44 -9 Markree. 



*' The results are : 



1848, April 300. (Greenwich mean time.) 



Mean anomaly 129° 50' l"-79 



Perihelion on orbit .... 75 38 4 -45 



Node 68 23 40-05 



Inclination 6 36 31 -08 



Angle of eccentricity . . . 13 4111-91 



Log. semiaxis major . . . 0-3823490 



Mean daily motion . . . 947"-2904 

 Time of Revolution, 1368 days. 



"For the middle place this gives the differences (calcu- 

 lation minus observation) - 0"-03 in longitude, and-0"01 in 

 latitude. 



*' Of course the result from so small an interval of time can 

 only be regarded as a rough approximation. I only give the 

 tenths and hundredths of seconds, as what I actually obtained, 

 and as what I used in checking the result. 



" Mr. Hind very opportunely and kindly sent me two ob- 

 servations which he made on April 30 and May 1. I was 

 particularly desirous to get observations on those nights, 

 but failed, on account of the weather. His observations 

 seemed to agree admirably, and I had no hesitation in adopt- 

 ing one of them in my calculation. My own observations 

 were taken with especial care, by both great Equatorial and 

 Meridian Circle, on both nights. On the whole, I trust there 

 is no material error in the elements as given above. 



" I have the honour to be. Sir, 



" Your very affectionate and humble Servant, 

 " A. Graham. 



" Edward J. Cooper, Esq." 



