[ 625 ] 
that at the Cape of Good Hope for the purpofe of 
the Sun’s parallax. 
+ Mr. profeffor Winthrop went, at the expence 
of the province of Maffachufet’s-Bay, to St. John's 
in Newfoundland, to obferve the tranfit of Venus, 
which he did with great care, and as much exadnefs 
as the low fituation of the fun at that time would 
permit. The internal contad happened there at 
4 h 4 1 ' l 7 " • He had no other way of determining 
his longitude from Greenwich, at that time of the 
year, but by taking the diftance of a ftar from the 
Moon, which gave him 3 K 20' 56" for his longitude 
from Greenwich, and therefore his obfervation of the 
internal contact could not be compared with the fame 
obfervation at the Cape. 
$ The longitude of Kingflon in Jamaica is deter- 
mined by the obfervation of the tranfit of Mercury 
over the Sun on the 25th of Odober 1743 O. S. 
mentioned in the Phil. Tranfadions: the effed of 
the parallaxes is confidered, and here included. 
The longitudes of Tornea and Madrafs are deter- 
mined from the contad at the egrefs, beeaufe I have 
good reafon to believe that the obfervation at the egrefs 
at thefe two places was not corred, and the obferva- 
tion of the contad at the ingrefs is more certain than 
that of the egrefs, and the obfervers at the ingrefs at 
thefe two places agree to 2". 
The elements 1 made ufe of in the preceding cal- 
culations are 
O / j j 
The Sun’s diameter - - =03131 
The diameter of Venus =0 059 
The horary motion of Venus in 
her path 
3 59 . 8 
The 
4 L 2 
