[ 37 6 ] 
I don’t doubt, that, if I could have adapted the mi- 
crometer to it, the diameter of Venus would have 
appeared larger than it did with the 9 feet telefcope. 
I believe, that, by adding the femidiameter of Venus, 
as I obferved it, to the greated phafis 5' de- 
ducting from the fum one half of the excefs of the 
true diameter of Venus above the obferved one 54/ -1, 
and ladly, by fubftraCting the remainder from the femi- 
diameter of the Sun, the lead didance of the centers 
will be found pretty exaCtly ; which was one of the 
principal obfervations I propofedto make. 
My obfervations of the didances of the limbs, or at 
lead the greated number of them, cannot be depended 
upon, to more than one fecond. In this almod un- 
inhabited idand, I wanted feveral conveniences ; and, 
notvvithdanding all my endeavours, the high wind 
often dilordered my indrument. 
The method I made ufe of, appeared to me to be 
the bed for the determination of the parallaxes of the 
Sun and Venus. I knew that this phenomenon 
would be obferved elfewhere, by methods, that would 
more direftly determine the mod important elements 
of the orbit of Venus. 
I have leen no fatellite of this planet .; nor was Mr. 
Thuillier, profeffor of mathematics, and appointed 
to adid me, by the King and the Academy, luckier 
than myfelf. 
I prefent thefe obfervations to the Royal Society of 
London, as a jud tribute of my edeem, my refpeCt, 
and my gratitude, being fenlible that I owe to lome- 
of the members the paflport, which the Englidi ad- 
miralty were gracioufly pleafed to give me. 
I have 
