Sun's observed and computed right ascensions, &c. 443 
render them comparable with the observations of Blackman- 
street, and Greenwich; Mons r . Bouvard having, however, 
kindly annexed to the Paris observations, the names of the 
stars used each day, in determining the clock's error, and 
having also put me in possession of the catalogue used at the 
Paris observatory, to find equations, by which each observa- 
tion might be expressed in terms of the Greenwich catalogue, 
became only a matter of calculation. 
Dr. Brinkley having likewise been equally indulgent, 
the Dublin observations are, by similar treatment, available 
to my purpose. 
Tables XII. and XIII. contain the sun's right ascension 
computed for the meridian of Paris, on such days as the sun's 
transit was observed at the Paris, and Blackman-street obser- 
vatories, during 1821 and 1822 ; whilst Tables XIV. and XV. 
answer the same purpose for the meridian of Dublin. The 
longitude of the former, being assumed as 9 min - 2i sec - of time 
east ; whilst that of the latter is regarded as 25 mIn - 22 8ec • of 
time, west of the Royal Observatory at Greenwich. 
Tables XVI. and XVII. exhibit the sun’s right ascension, 
as observed at Paris, by the Paris Catalogue, in values of the 
Greenwich Catalogue ; and Tables XVIII. and XIX. serve 
the like purpose to the Dublin observations, reduced by the 
Dublin Catalogue. 
Tables XX. and XXI. show the differences between the 
sun’s observed and computed right ascensions, by Green- 
wich observations of 1821 and 1822. 
Tables XXII. and XXIII. indicate the differences by Paris 
observations ; and Tables XXIV. and XXV. exhibit the dis- 
cordances by Dublin observations. 
