[ IS 9 ] 
the apparent ; the 6th at the fame hour it got only 9". 
The obferver was obftruCted by the clouds till near 
the inftantof the exit of Venus. This is his obferva- 
tion of the exit ; the times are thofe of his clock,, 
from which z' 10" are to be fubftraCted to have the 
apparent time. At 6^2 %’ the preceding limb 
of Venus appeared to touch exactly that of the Sun ; 
at o h 22 / oo // onequarter of her diameter was got out; 
at o h 2 5 / io // Mr. Seligny judged her to be half got 
out ; at o h 2 8 / o6 // the three quarters of her diameter 
were emerged, and o h 3i / i2 // the exit was total and 
inftantaneous. Thefeobfervations follow one another 
very well, and they have been made by a man whom 
I know to be very fkilful ; but how the exit of Venus 
could appear to him to have taken up but 12^ 4" I 
muft leave to perfons fkilled in natural philofophy 
to account for. The obfervation of the firft contaCt, 
or of the internal contact of the limbs, would give 
you more than 1 z" for the parallax ; that of the lad; 
would reduce it to eight; by a medium, the parallax 
would exceed io 7/ . 
You will undoubtedly have obferved a pretty re- 
markable difference between my obfervations of 
Venus, as I had the honour to fend them to you 
from Lilbon March 6, 1762, and the fame obferva-- 
tions as I have related them in my memoir. I ima- 
gined I had fent the correction to fome one of the - 
members of your celebrated Society. When I made 
the reduction of thefe obfervations at Rodriguez, . 
I found myfelf under difagreeable circumftances ; 
and it was probably my uneafinefs at that time that 
occafioned a want of due attention, which I was 
the longer in finding out as I could not eafily fuf- 
