Brinkley on Cotneis. 166 



excellent Instruments at that observatory, viz., by the transit 

 instrument and astronomical circle, eight feet in diameter. 



It rarely occurs that observations of a comet can be made on 

 the meridian, and therefore the results of such observations may 

 afford some interest. Dr. Brinkley computed the elements of 

 the orbit from three observations made on the 4th, 5th, and 6th 

 of J uly, and further corrected the elements so obtained by the 

 observations of the 4th, 13th, and 20th of July. The result 

 was as follows : 



Passage of perihelion, mean time -i 

 at observatory, Trinity College^ jun« 27, 16 26 46 

 Dublin J 



Perihelion distance 0,341051 



Longitude of node 9 3 43 44 



Inclination 80 45 53 



Place of perihelion 9 17 5 5 



Motion direct. 



The results of the comparisons of his observations and ele- 

 ments are as follow : 



