M 



PAPERS. 



3S 



^ -^ 



chords arc delineated in the projeaion, and ferve to confirm 



-the other work. 



All the parallaxes of Venus from the Sun were taken 

 from a projedion on a large fcale of half an inch to a fe- 

 cond, and then reduced to the fcale of this delineation Af- 

 ter calculation fomc of thofe parallaxes, and findinr^ that 

 thofe got by the projedion came as near thofe got by cal- 

 culation, as it was poffible to lay them down from thcfcale- 

 any further nicety was not thought neceffary. 

 I'he angle of Venus,s vifible way with the 



.28 



/ 



27 



-0 _' 



13 



Ecliptic I find to be 



■ The angle of the ecliptic with a parallel oi 

 declination at 3", P.M 



Decreafing 53" per hour. 

 Latitude of the Obfervatory (as above) 40° g' -6" 



Hence the parallaxes were fitted to each of the micrometer 

 obfervations, as laid down above. If a computation be 

 niade from the firft micrometer obfervation of the diftance 

 of the hmbs, we fhall find the time of the leaft diftance of 

 the centers of the Sun and Venus as feen from the Earth's 



center to have been -. - _ h 



If a like computation be made from the 

 1 6th obfervation it will be found 



26' 16 



// 



5. 26. 21 



By comparing fome other obfervations with thefe Icon 

 elude the titBe of leaft diftance of the centers to have been 

 5. 26 . 20 



Then fay, as radius to the tangent of the angle of Fcnus's 

 vilible way with the ecliptic; fo is the leaft diftance of the 

 centers, to that portion of the path, intercepted between 

 the place of Fenus at the time of the leaft diftance of the 

 centers, and her place at the time of ecliptic conjudion. 



that is — 



Rad : T. 8". 28 



. 27" :: 610 

 But 90", 88 reduced to time is - - 

 Time of leaft diftance of centers is - 

 Diff'ercnce of which is the time of 

 ecliptic conjunction 



// 



/' 



o 



h 



26. 20 



5"- 3'. 39 



n 



Again 



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