Jn Account of Observations made at theObsevvatory of TRINITY" 

 COLLEGE, DUBLIN, with an Astronomical Circle, eight 

 feet in diameter, which appear to point out an annual parallax 

 in certain fixed stars. 



Also a Catalogue of North Polar distances of forty-seven prin- 

 cipal fixed stars, from recent observations, and a compariso*i 

 thereof with those of the same stars, obtained by other instru- 

 ments, and by the same instrument, at a former period. By 

 JOHN BRINKLEY, D. D. M. R. 1. A. F. R. S. and 

 ANDREWS' Professor of Astronomy, in the University of 

 Dublin. 



Read May 9, 1 814. 



To prove the motion of the earth about the sun, bj 

 actual observation of change of distance from some of the 

 fixed stars, at different times of the year, has long been an 

 object of research. Soon after the Copernican System be* 

 came generally adopted, and while Astronomy was yet in 

 an imperfect state, tliis was considered in some measure ne- 

 cessary to establish the truth of that system. Afterwards 

 the discoveries in physical astronomy made this enquiry, as 

 far as the above motive was concerned, less interesting. 



YOL. XII. ft 



