jS° ot ob- " 
fervailoni. 
2 
L. 3 
41 
5 
R. 
Dlametci-s of Venus on tlii 
Sui), June 3, 1769. 
P. M. 
h / 
3 o 
3 2 
3 4 
5 55 
t 3 
&■ 
r» 
M 
o 
o 
o 
o 
o 
tJ 
o o 
o 
sr 
2 
2 
2 
2 
2 
4.5 
4 >S 
5 
4>7 
4.7 
Diameters of the Sun, 
June 2, P. M. 
R. 3 50 46 
3 52 o 
4 37 o 
t 3 
n 
»- 
3 
3 
3 
14 
o 
5 * 
1 1 
1 1 
1 1 
<y 
o 
15 hor'zontal 
14 ] vertical 
14,5 j diameter 
A. M. June 3. 
3 58 025- 
R. 
L 
8 
35 
0 
3 
1 1 
13.5 
8 
40 
0 3 
1 1 
16- 
The above times art 
fet down by the clock, 
8 
4 S 
0 3 
P. M. 
1 1 
13.5 
according to the vulgar 
12 
35 
0 
3 
1 1 
13 
reckoning; as are all 
R. 
12 
40 
0 3 
1 1 
12,5 
the micrometer obfer- 
vations of the Sun’s di- 
ameters. 
4 
40 
0 
3 
1 1 
10,5 
I 4> 
r § i 
! E 
vertical 
From a mean of the above fix diameters of Venus on the 
Sun, allowing for the error of adjuftment, as mentioned 
below : 
Venus’s diameter, for the day of the tranlit, was 
The Sun’s femidiameter, from a mean of the five'| 
horizontal diameters, taken the fame day j 
Or, from a mean of four, taken that dayj leav- I 
ing out the fecond, which Mr. Lukens thinks f* 
he may have taken too large J 
o 57.3 
15 47.0 
15 45»o 
All the micrometer oblervations were fcparately reduced to 
their value in minutes and feconds, both by Mr. Rittenhoufe and 
myfelf. Many more might have been taken ; but as fo many 
perfons were defirous of looking through the telefcope, they 
could not well be denied ; and the number above fet down are 
found fully fufEcient for all the purpofes of the projedion ; efpe- 
cially as they have been found to agree fo well with each 
other. 
Such of the micrometer meafures as were taken by Mr. Rit- 
tenhoufe or Mr. Lukens, are marked with the initials of their 
names. All the others I am anfwerable for. 
Our obfervations being thus finlflied, Mr. Ritten- 
houfe was pleafed to undertake the projedion of the 
tranfit 
