404 Capt. Kater's experimen tsfor determining the variation 
read off by the non-commissioned officer and myself, without 
either of us moving from the place where we stood. In this 
manner the three following series of observations were made. 
The error of the chronometer was determined by altitudes of 
the sun given in the Appendix, and its daily rate was i*,2 6. 
Arbury Hill, i 8th October, 1818. Barometer 29,40 inches, thermometer 48°,5. 
Chronometer too slow 14 s , 7. Pole star on the meridian by the chronometer 
1 i h .9 m .29 s ,9. 
Readings, 
&c. 
1st. Vernier 
m 
O / // 
HS- 32-57 
Second 
- 
20 
Third 
- 
3 ° 
Fourth 
- 
35 
Mean 
. 
H 5 - 3 2 - 35 »S 
+ 360, 0. 0 
Level 
3,6 
Index 
4 
18,0 
14) 505.32.49,90 
Observed Z. D. 
36. 6.37,85 
Refract. 
+ 
41,90 
Correct. 
— 
11 >79 
2 r'C. 
0,05 
1 
N 
I 
N 
+ 
0,28 
True Z. D. 
+ 
36. 7. 8,19 
Mean P. D. for 1 8 1 8 + 
1.39.44,15 
Precession, &c. 
— 
18,23 
Co. Lat. 
- 
37.46.34,1 1 
Lat. of Arbury Hill 
52.13.25,89 
Chronometer. 
Level. 
Time from 
the 
meridian. 
N. v. Sines. 
h. m. s. 
m. s. 
IO.48 35 
+ 
22 
— 22 
20.55 
4162 
lo- 53 - 5 
+ 
z 3 
— 22 
16.25 
2564 
10.57.40 
+ 
2 J 
— 24 
n 53 
*344 
11. 1.38 
+ 
24 
— 21 
7.52 
0589 
II. 5. 2 
4 
24 
— 2 1 
4.28 
0190 
11. 8. 0 
+ 
2 1 
- 24 
1 - 3 ° 
0021 
1 1. 1 1 .23 
+ 
25 
— 19 
i -53 
0034 
1 1. 14.22 
+ 
20 
— 25 
4.52 
0226 
11 18.55 
+ 
24 
— 21 
9.25 
0844 
11. 21. 55 
+ 
1 8 
— 26 
12.25 
1467 
11.24.55 
+ 
23 
— 21 
15.25 
2262 
1 1.27. 10 
+ 
21 
— 25 
17.40 
2970 
11.30.47 
+ 
2+ 
— 21 
21.17 
4309 
*‘• 33 - 3 ° 
+ 
22 
— 23 
24. 0 
547 8 
+ 312 
—315 
1890 
X2,4rz — 3,6 cor. for the level. 
jZ 
Lat. 52 13.26 cosine - 9.7871611 
Dec. 88.20.30 cosine - 8.4614886 
Alt. 53-52-50 cosine co. ar. 0.2295379 
Log. sin. 1 co. ar. - - 5.3168000 
Const. Log. 3.794987 6 
Log. 1890 (+4) 7.2764618 
Correct. — iT'^Log. 1. 0714494 
