C 494 3 
It has been (hewn that the parallax reflat- 
ing from the total durations is 
— from a comparifon of the obfervation at 
- Madrafs with thofe of Tobolfki and Ca- j* 9,763 
janeburg is — — — J 
— • from a comparifon of the obferved, with! 
a calculated, duration without parallax, isj ^ 2 4 
— from the lead diftance of the centers — 9, 920 
— from the obfervations combined together is 9, 6 95 
} 9.579 
It can hardly be fuppofedthat as fuch different me- 
thods give a parallax of the Sun on the day if the 
tranfit equal to 9^,736, that this parallax fhould yet 
be only 8,692 as deduced from a comparifon of the 
obfervations with the Cape, while the fame obferva- 
tions compared with thofe of Rodrigues and Lifbon 
fhew that the parallax exceeds 10 feconds. Let us 
therefore fuppofe that the obfervers at the Cape have 
let down their obfervation one minute too foon, tho’ 
it muft be confelfed that the time of the duration at 
the egrefs cannot warrant fuch a corre&ion, and that 
the time of the internal contact fhould have been ob- 
ferved at 2i h .40 / .52 / ' j the parallax, by taking a mean, 
will then be 9^,732, exa&ly agreeing with a mean 
of all the other determinations. And in this Quan- 
tity of the Sun’s parallax we muft either acquiefce, or 
remain as ignorant of the true quantity of it as wc 
we were before, till we can have recourfe to the next 
tranlit on June 3d 1769, when the planet Venus will 
again pafs over the Sun’s difk, having fomething 
more 
