[ 418 ] 
Venus's diameter. 
0 10 2 
0 10 8 
5 24 
6 
S 24 
8 
10 0 
8 
0 
0 
0 
0 10 7| 
By thefe meafurements, the corre£lion of 
adjuftment of the micrometer, is — 3I and 
Venus’s diameter 10 D. 3I V.:=^6",o2. 
The mean of the three feparate dcdu< 5 tions of Venus’s obferved 
diameter, is 56", 4. 
A T ABLE for reducing the foregoing obfervations deduced from the 
meafures of the Sun’s horizontal diameter, fuppofed =31^ 3 *^^* 
lacbet 
Angle 
Decimals 
Angle 
of an In. 
9 99 
M S 
I 
00 
.05 
0 26,1 
2 
17 22,2 
,ro 
0 52,1 
3 
26 3,3 
I 18,2 
,20 
I 44,2 
j 25 
2 10,3 
j 3 o 
2 36.3 
» 3 S 
3 2,4 
,40 
3 28,5 
j 4 S 
3 54.5 
4 20,6 
»SS 
4 46,6 
,60 
5 12,7 
5 38.7 
j 7 o 
6 4,8 
»75 
6 30,8 
,80 
6 56,9 
.85 
7 22,9 
,90 
7 49.0 
• 
>95 
8 15,1 
1,00 
8 41,1 
Div. of 
Vern. 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12 
*3 
H 
15 
16 
*7 
18 
19 
20 
21 
22 
23 
24 
25 
Angle 
s 
i»o 
2.1 
3.1 
4.2 
5.2 
6.2 
7.3 
8.3 
9.4 
10.4 
*1.5 
12.5 
13.5 
14.6 
15.6 
16.7 
17.7 
18.8 
19.8 
20.8 
21.9 
22.9 
24.0 
25.0 
26.1 
N. B. The obfervations made by Mr. Green with DoIIond's 
micrometer, particularly thofe concerning the difference of decli- 
nation of Venus and the Sun’s limbs, and the diftances of Venus 
from the Sun’s limb in lines parallel to the equator, will be better 
underftood by confulting a paper intiticd Dire£lions for obferv- 
ing the Difterences of Declination &c. with DoIIond’s Microme- 
ter, by N. Maflcelyne, Aftronomer Royal, a copy of which was 
given to Mr, Green, before his departure from England ; which 
will appear in this volume, Obferva- 
