[ 259 ] ' 
By comparing the inftant of time 16’' 44' 3", 42 per clock the Sun palted the me- 
ridian under the Pole on the 2d of June, with the inftant i6^' 44' 22^05 per clock, 
it paffed the meridian mark per tranfit inftrument, I find it is 18", 63 later per tranfir, 
that is, the mark northward ftands 18", 63 too much to the eaft. Now by putting up 
another mark at the fame diftance as the fit ft, fo as to correfpond to the fecond v/ire, 
and meafuring the diftance between this and the firft markj I find it to be 36 feet. 
This increafed in the ratio of the zen. dift. 86° 48' to rad. gives 36,057 feet for the 
fpace correfponding to 45'!, the time of the Sun's paftage from the fecond to the third 
or middle wire. 
The reafon of this increafc is, that all the wires in a tranfit inftrument, except ihs 
middle one, defcribe lefler circles^ parallel to the middle one, which defcribes an azi- 
muth. Having got what fpace correfponds to 45"!, we have, by proportion, 14,76 
feet for the fpace, anfwering to 18", 63, which the mark muft be moved weft ward to 
be in the true meridian. 
THE TRANSIT OF VENUS. 
Time p. clock 
1769 
h June 3 
h 
f 
" 1 
13 
40 
ooj 
43 
00 
50 
00 
^9 
47 
00 
The planet feemed to becompleatly upon the Sim, but no thread 
of light : this was an inftantaneous view, and throus-h a thin 
cloud. 
The air all this time very hazy. 
Saw V enus upon the Sun’s limb, the 2d internal contadf being paft. 
After this, all cloudy as before. 
«ib 
THE ECLIPSE OF THE SUN. 
Timepiclock Micrometer 
Ap. timj Value of microm. 
h 
/ 
// 
4 
:: 
0 
n 
0 
14 
Ln 
h 
It 
0 
// 
p“ 
5- 
5 - 
2 
3 
23 
3 
c 
20 
21 
CO 
18 
5 L 9 
7 
44 
2 
<3 
17 
i8 
9 
i6 
39 >i 
10 
3 ^' 
2 
9 
21 
20 . 54^3 
27>4 
13 
33 
2 
5 
12 
23 'S 7 
14 
6,14 
22 
5 
4 
17 
21 
32 | 27 | 
30 
22,8 
24 
57 
4 
19 
1 1 
3519 
30 
52,7 
4 
I 
6 
14 
40,25? 
8 
33 
37 
I 
4 
1 1 
4357^6 
'7 
4 
3336 
L 1 2 
The verfed fine of lighi 
Ditto 
Ditto 
Ditto 
Dift. of cufps 
Ditto 
Verfcd fine of light 
Ditto 
Time 
