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IX, A Deduction of the Quantity of the 

 Suns Parallax from the Comparifon of the 

 fever al Obfervations of the late Tranjit 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 Feterf- 

 burg $ in a Letter to Charles Morton, 

 M. Z). Sec . R. S. and Acad. Imper. Pe- 

 troburg, &*& Soc* 



Read March s , ^-VBSERV ATI ONES novimmi tranf- 

 \^/ itus Veneris ante difcum Solis* 

 A. 1769, in infula maris Auftralis, King George: 

 Ifland dicl:a inftitutas, calculo nuper fubjecit acade- 

 micus nofter D. Lexell, earumque comparationem 

 cum obfervationibus celebratiffimi hujus phaenomeni 

 in Europa fa&is inflituit, ut quantitatem parallaxis. 

 Solaris erueret. Longum omnino foret, fi omnium^ 

 calculorum ab ipfo inftitutorum juftam heic adferre 

 vellemus expofitionem, idemque etiam minus ne- 

 cefTarium, quum difTertatio ejus hac de re confcripta 9 , 

 Tomo XVI. noftrorum Commentariorum inferenda, 

 £13 fumma igitur tantum capita conclufionum in- 

 ventarum perflringere furTecerit. In antecerlum vero^ 

 e re eft monuiffe, methodum ab ipfo adhibitam. 

 candem effe) quam Illuftr. Eulerus in.venit et quaa in* 



part*. 



