FARTHER CONSIDERATIONS 



COMPARATIVE OBSERVATIONS OF THE DIFFERENCES OF RIGHT 



ASCENSION OF THE MOON'S ENLIGHTENED LIMB WITH 



THE SUN'S CENTRE, AND WITH STARS UNDER 



DIFFERENT MERIDIANS ; 



TOGETHER WITH THE 



ACTUAL RESULTS OF A GREAT NXMEER OF SUCH OBSERVATIONS, MADE IN VARIOUS 

 YEARS, AT THE RESPECTIVE OBSERVATORIES OF GREENWICH AND ARMAGH. 



By the Rev. ARCHIBALD HAMILTON, D. D. M. R. L A. DEAN of CLOYNE. 



Read, Nov. 3, 1806. 



q oooooey^ 



Observatory, Armagh, May I, 1806. 



Having now, fot above ten years, befen in the practice of 

 either observing myself, or of causing to be observed by my 

 assistant, the moon's meridional passages compared with the 

 most suitable of those fixed stars, whose places are so accu- 

 rately settled by our excellent astronomer royal. Dr. Maske- 

 lyne, and being annually furnished with those accurate and 

 valuable observations, made and published under his inspec- 

 tion, I have been thus provided with complete materials fpr 

 ascertaining the merit of the method I formerly submitted to 

 the Royal Irish Academy, for determining the longitudes of 

 VOL. XI. E places 



