L-^ 



4 



M A T H E MAT I C A L and 



The Jolloiving CALCULATIONS and PROJECTIONS 

 of the Tranfit of Venus nvere laid before the Society a^ 

 greeable to their Dates^ and claim a Place hercy as it 

 may he ofUfe^ in ^various Refpe^s^ to compare them nvith 



I the ad;ual Obfervations of the Tranfit, afterwards made 

 in this Pro'vince ; and from thence to colleEl the Differ- 

 rences betiveen Computation and OhfervatioUy together 

 'with the Caufes of thofc Differences. 



L r 



Read aift T>R-OJECTION of the enfu'mg Transit af VENUS over tht SUN, tvl/tch U H 



June. 1768. A )&a//frt June 3d, 1769. j&y David Rktenhouft, A* M, 



4 ■ , 



Elements from Hallcy's TabUs^for Lat, 40*' ^* ^ •Lo"£' 7J ^. frof^ Greenwich, 



Communicated by Mevd, Dr.^Smxth, 



1769, June 3d, at 3h. P. M. Sun*i place, a", 13**. 

 Heliocentric place of § in ecliptic, 8. 13. 



ai'. 37" 



1 8. II lu^t. ? N. V 219" 



%aQ z' a6" 



At 8 Hour* P. M, Sun*s place, a». 13^ 33' ^s" 



Place of Venus 8, 13. 38 -% Lat. ? N. 3' 18" 



9 ^ ^ 4. A7 



J" 



Log. 



Log. 

 Log. 



a© J. 006568 Diftance 10152385 

 a 4.861095 r>jft. 77 62^65^ 



§ ae 4.460858 Dift. a88y733 



lijff. Log. 



400137 



Apparent Scmidiamctcr of 15'. 51'' 

 Apparent Semidiameter of $ 



=15', S5 



o'l 5719 

 Diminifli'd * Semidiam. of 6','^o6?7 • ti ■ r i- 00 



Beginning of the Tranfit, ah. 16' 



End, 8. 50 



But fuppofing the Sun*9 horizontal Parallax hut 8 Seconds, then for the ahorc Lat. and Lon. 



Firfl External Conta<Sl will be at ah. iimin. \ 



• The Biamtitrs wert dlmlnlfhed it anfivtr the Scale to ivhich the Lat. efVmus •wasfH off in tli 

 '^ ^ See the I'rojemon; Plate\. 



\. 



The 





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