C 300 ] 
1 
XL VII. Second Paper concerning the Paral- 
lax of the Sun determined from the Obfer- 
vations of the late Tranfit of Venus, in 
' which this SubjeSl is treated of more at 
length , and the Quantity of the Parallax 
more fully afcertained . By James Short, 
M,A. and F. R. S . 
Read Dec. 8, TT N the lad: volume of the Memoirs of 
1 " 6 3 * the Royal Academy at Paris for the 
year 1761, there is a Memoir by M. Pingre, who 
went to the ifland of Rodrigues, and oblerved the 
tranfit of Venus there ; in this memoir M. Pingre 
endeavours to determine the parallax of the Sun, by 
the obfervation of the late tranlit of Venus, to be 
— 10 ". both by the obferved durations, the lead: dif- 
tance of the centers, and by the internal contact at 
the eorefs ; and feeems to think that there mud; be 
fome miftake in the obfervation of Mr. Mafon at the 
Cape of Good Hope, particularly with regard to the 
difference of longitude between Mr. Malon’s obfer- 
vatory and Paris, becaufe by comparing the obfer- 
vation of Mr. Mafon at the Cape with the European 
obfervations, he finds the parallax of the Sun, from 
thence refulting, to be between 8" and 9", confe- 
quently differing from the determination by the ob- 
fervation at Rodrigues when compared with the lame 
places. I (hall therefore, in this paper, endeavour 
to prove, beyond all doubt, by a companion of the 
obfervations 
