PHILOSOPHICAL 
TRANSACTIONS. 
XIV. On the parallax of certain fixed stars. By the Rev . John 
Brinkley, D D. F. R. S. and Andrews professor of astronomy 
in the university of Dublin. 
Read March 5, 1818. 
The attention of the Royal Society has been lately called to 
the subject of the parallax of the fixed stars, by the astro- 
nomer royal ; and as this has been occasioned principally by 
the results of observations which I have made at the Obser- 
vatory of Trinity College, Dublin, I have taken the liberty 
of offering a few remarks relative to, and connected with this 
subject. 
The Royal Society did me the honour to publish an extract 
of a letter to the late Dr. Maskelyne on the parallax of a 
lyrag ; since which time, in pursuing my observations, I 
have met with apparent motions in several of the fixed stars, 
the cause of which I was unable to explain, unless by attri- 
buting them to parallax. Among these stars « aquilag exhi- 
bited the greatest change of place. 
The results of my observations have been published in the 
12th volume of the Transactions of the Royal Irish Academy 
MDCCCXVIII. O O 
