[ 6 9 1 
IX. A DeduBion of the Quantity of the 
Suns Parallax from the Comparifon of the 
fever al Obfervations of the late 'Tran ft of 
Venus, made in Europe, with thofe made 
in George Ifland in the South Seas : 
Communicated by Mr. Euler, jun. Secre- 
tary of the Imperial Academy of Peters- 
burg ; in a Tetter to Charles Morton* 
M. D. Sec. R. S. and Acad . Imper. Pe~ 
troburg* &c. Soc . 
3 iead March 5 , ^vBSERVATIONES noviffimi tranf- 
J 77 2 * itus Veneris ante difcum Solis,, 
A. 1769, in infula maris Auftralis, King George 
Hand dibla inftitutas, calculo nuper fubjecit acade- 
micus nofter D. Lexell, earumque comparationemu 
cum obfervationibus celebratiffimi hujus phaenomeni 
in Europa faftis inftituit, ut quantitatem parallaxis 
Solaris erueret. Longum omnino foret, ft omnium 
calculorum ab ipfo inftitutorum juftam heic adferre 
vellemus expofitionem, idemque etiam minus ne- 
cefiarium, quum diftertatio ejus hac de re confcripta,, 
Tomb XVI. noftroruni Commentariorum inferenda 
fit ; fumma igitur tantum capita conclufionum in— 
veritarum pbrftringere fufFecerit. In antecefium vero 
e re eft monuifte, methodum ab ipfo sdhibitam 
eandem efte, quam llluftr. Eulerus invenit et quas in, 
part*,. 
