18ß GERA R DI REGNERl FOCKENS 



Ad hfipc Bailliiis animaflvertit ('), priorem Hailei animadvcrsionem, quae est de 

 magnitudiae stellaruai , confirmari observalione curiosissima occultae y^irginis y duplicig. 



§ 12. 



Venlum est ad Bradleium, quem reverentia quadam prosequi decet, Sed ab initj» 

 ordiendum est (f). j,,', ,.^,1 



Molvnucius idem ille, cui parallaxeos res a Wallisio tarn cordialiter erat com- 

 niendata , elsi non secutus melhodum ab illo propositam,, nihilomiaus deternjinandae pa- 

 rallaxeos laborem aggressus est. Qua in re quo melius versa re tur , Bradleium amicuta 

 Tidetur consuluisse , alque rogasse , ut hie, qui Wansteadiae habilaret, ideutidem 

 Kiobam veniret, observationesque secum inslitueret. 



Proposilum initio hoc sibi habuere , ut verificarent et confimaarent observationes, quas 

 Hookius ante ho« 50 annos public! juris fecisset. Viderunt enim ea? isliusniodi e^e, 

 iit ma^is ex his eventus veritas , quam ex anlecedenlibus omtiibus cognilis exspecU- 

 ri potuisset. Ita scribit aulem amico. Ha lleio : 



« Sir! You having been plcased lo express jour satisfaclion wilh what I had an op- 

 « jiortunily somctime ago, of telling jou in conversation , concerning som^ Observation», 

 <( ihal were making by our late worthy and ingenious friend , Ihe honorable Samu&J 

 « Molvneux Esquire, and which have since been conlinued aud repeated by my «elf, 

 « in Order to determine the parallax of the fix'l stars; I shall now beg leave to lay 

 fc before jou a more particular account of them. 



« Before I proceed to give you the history of the observations themselves, it may be 

 « proper to let jou know that they were at first begun in hopes of verifying and confir- 

 (, mingthose, that Dr. Hook formerly communicated to the publick, which seemed 

 « to be attended wilh circumslances that promised greater exactness in them, than oouM 

 « be expected in any other , that had been made and published on the same accoun«. 

 « And as his altempt was what principally gave rise to this, so his methotl in making 

 « the observations was iü some measure that which Mr. Molvneux followed. For he 

 K made choice of the same Star , and his instrument was constructed upon almost the 

 « same principles, But if it had not greatly exceeded the Doctors in exactness , we 



« migl« 



(*) Bailly 1. 1. 11. 658, qui citat ilemoires de VAcademie, Ijso p. 1*1." 



(\)Phil. Trtins. i-!i5. p. 6J7. Titulus est: A lelter from the Reverend Mr. James Brarl- 

 ley, Savilian Professor of Astronomy at Oxford and F. R. S. to Dr. Edraond IIa Hey, Aitro- 

 nom. Reg. etc. gifing an account of a, new discovered motion of the fi*'d stars. 



