COMMENTATIO ASTRONOMICA. 245 



« inslrument, I am not al present disposed to admit. 1 had inlended concludiii" wilh 

 « some nolices respccting Mr. Pond's paper on the parallax of a Lyiae , read before 

 « the Royal Society on the same day as ihat relative to the southern molion ; but as 

 « that paper requires lobe particularly rcraarked on, I shall here confine myself to the 

 « cousideration of the north polar distances, and. as connected therewith of the sou- 

 (( ihem motlon. " 



Neque non cito id, quod pollicilus erat, praeslitit. Scilicet Marlii 11 , 1824 cum So- 

 cietate denuo quaedam communicavit (• ), 



Scriptionis argumentum exordio salis indicatur. 



« The paper of the Astronomer Royal on the parallax of « Lyrae , in Ihe first part of 

 « the Transactions for 1823 , from Ihe manner in which the rubject is there irealed 

 « appears to me likely to mislead as to the actual state of Ihe queslion relative to ihe 

 « existence , or non-exislenee , of visible parallax in » Lyrae. . . . 



« In Ihe view which Mr. Pond has taken of the queslion, some important circum- 

 (( stances of my observalions are so imperfecily related , that I am apprehensive the 

 « Greenwich rcsults will appear to possess a weight beyond what a close examinatiou 

 « will show belongs to them." 



« From the facls that I shall produce, I think a more correct eslimate may be for- 

 « med of the relative merits of the Dublin and Greenwich circles. " 

 « The subject divides ilself iuto Iwo parts. 



« 1.) On the difference of parallax belween <y Draconis and« Lyrae. 

 <t 1, ) On the absolute parallax of a Lj'rae. 

 « I shall remark on each separately. " 



Itaque scrjptionem Pondianam perlustrat, examinal, corrigit, reprehendit, huraa- 

 niler ille quidem , uti solebat ulerque, sed cordialiter tarnen el vivaciier. Quae huc enim 

 pertinent, fundilus omnia eruuntur, et digesta per annos traciantur. Et primum quidem 

 Caput ita lerminatur: 



« The conclusions relative to the parallax of a Lyrae, which Mr. Pond deduced from 

 « his observalions of that slar and y Draconis, formerly appeared to me more adverse 

 « than any thing eise to my results. " 



« When , some lime ago, in examining the Greenwich observalions, I found that a. 

 « comparison of the intercepted arcs of the mural circle between Polaris and « Lyrae , ■ 

 « in Summer and winter, gave a parallax for » Lyrae equal to what I had found by 

 « the College circle, I cousidered, that Mr. Pond's argument from y Draconis was 



« greal 



(*) Phil. Trans, 1S24. P. II. p. 471, Tilulus est: Bemarics on the parallax of a l^rae, By John 

 Brinkley, 



Hh3 



