1 8 MijeeUanea Curlofa, 



and 3' to the Eaft, according to Mr. Hooks Ob- 

 servation. But at that of the Second Example, 

 1 my felf (near London, with the fame Inftru- 

 incnts whereby I formerly obferv'd the- Sou- 

 thern Conftellations) found the Place of the 

 Comet to be ®, %% \ \'% and 28% 52'' North 

 Latitude, which agreed exactly with the Ob- 

 servation made at Greenwich almoft the veiy 

 fame Moment. 



As for the Comet of the Year 1680, which 

 came almoft to the very Sun it felf (being in 

 its Perihelion, not above \ of the Semi- Diameter 

 of the Sun diftant from the Surface of it) Since 

 the Lafm Rett urn is fo very fmall, could hardly 

 be contained within the Limits of the General 

 Table, becanfe of the excefiive Velocity of 

 the Mean Motion. Therefore in this Comet, 

 the belt Way is Rafter the Mean Motion is 

 found) to get from thence (by the Help of the 

 foregoing Equation zj~\- 3*. = of the Mean 

 Motion) the Tangent of Half the Angle from 

 the Perihelion, together with the Log. for the 

 Distance from the Sun. Which Things being 

 given, we are to proceed by the fame Rules, 

 as in the reft. 



After this Manner therefore, the Aftrono- 

 mical Reader may examine thefe Numbers, 

 which I have calculated, with all imaginable 

 Care, from the Obfervations I have met with. 

 And 1 have not thought fit to make them pub- 

 lick before they have been duly examin'd, and 

 made as accurate as 'twas poffible, by the Study 

 of many Years. I have publilh'd this Speci- 

 men of Cometical Aftronomy, as a Prodromw 

 of a defigned future Work, left, happening 



to 



