in the length of the pendulum vibrating seconds . 4,05 
A r BURY Hill, 22d October, 1 8 1 8. Barometer 29,40 inches, thermometer 45 0 
Chronometer too slow Pole star on the meridian by the chronometer 
io h -53 m -4° s ’7- 
Chronometer. 
Level. 
Time from 
the 
meridian. 
N. v. Sines, 
h. m. s. 
IO - 37 - 5 
+ 
24 
~ 24 
m. s. 
16.36 
2622 
10.40.15 
+ 
23 
— 25 
13.26 
1 7 1 7 
10.44.45 
+ 
25 
~ 23 
8.56 
0760 
10.49.27 
+ 
24 
— 24 
4 -H 
0171 
10.53.25 
+ 
28 
— 19 
0.16 
0001 
10.57.45 
+ 
26 
— 23 
4. 4 
OI 57 
11. 1 . 1 8 
+ 
28 
— 19 
7-37 
0552 
11.14.45 
+ 
24 
— 24 
21. 4 
4222 
1 1.17.25 
+ 
27 
21 
23 44 
5357 
H.19.30 
+ 
25 
~ 24 
25.49 
6338 
+ 254 
226 
2190 
Readings, &c. 
( + 254 — 226) '/ w . , . 
— — * " * X 2,4=:-f 33,6cor. forthe level. 
- 3-7949876 
7.3404441 
Const. Log. 
Log. 2190 (+4) 
Correct. — 13 ",66 Log. 
O 
/ // 
1st Vernier - 
361. 
6.30 
Second 
- 
6.25 
Third • 
- 
6. 0 
Fourth 
- ' 
5-55 
Mean 
- 361. 
6.12,5 
Level 
+ 
33>6 
Index 
- + 
18,0 
10) 361. 
7. 4,10 
Observed Z. D. 
- 3 6 - 
6.42,04 
Refract. 
- + 
42,23 
Correct. 
- — . 
13,66 
2 r'C. 
— 
0,08 
(Z-ZO 
- + 
0,28 
True Z.D. 
- 3 6 - 
CO 
d 
1 • 1 3543 1 7 
Mean P. D. for 1818 -f- 
Precession, &c. - ■— 
t. 39.44,15 
19,72 
Co. Lat. - 37.46.35,24 
Latitude of Arbury Hill 52.13.24,76 
The night very clear, but.flying clouds. 
