Extreme Positions. 
259 
TABLE XXXIII. — Greatest and Least Diurnal Ranges of the Magnetic Declination, Horizontal and 
Vertical Components of Magnetic Force, for each Month in 1843, as obtained from Tables VI., 
XIII., and XX. 
Declination. 
Horizontal Component. 
Vertical Component. 
Month. 
Greatest 
Day. 
Least 
Day. 
Greatest 
Day. 
Least 
Day. 
Greatest 
Day. 
Least 
Day. 
Range. 
Range. 
Range. 
Range. 
Range. 
Range. 
i 
0-0 
0-0 
0-00 
January 
28 
11-85 
5 
3-40 
9 
0227 
7 
0029 
28 
1331 
20 
0059 
February 
6 
4903 
1 
319 
24 
0210 
2 
0045 
24 
1483 
2 
0099 
March 
29 
25-78 
1 
3-60 
7 
0346 
1 
0046 
7 
3300 
28 
0103 
April 
6 
33-38 
22 
5-30 
5 
1265 
22 
0144 
5 
3738 
22 
0145 
May 
6 
25-50 
13 
6-36 
6 
0939 
13 
0170 
6 
2713 
12 
0145 
June 
30 
25-60 
19 
7-00 
12 
0417 
22 
0187 
13 
0691 
9 
0139 
July 
24 
32-85 
6 
7-63 
25 
1627 
22 
0173 
25 
2258 
12 
0129 
August 
4 
19-10 
5 
7-16 
4 
0696 
16 
0196 
4 
1536 
16 
0142 
September 
18 
21-83 
30 
7-07 
9 
0405 
15 
0132 
22 
0896 
27 
0226 
October 
26 
25-14 
10 
3-55 
16 
0567 
21 
0130 
5 
1011 
28 
0130 
November 
3 
12-74 
27 
2-68 
3 
0237 
22 
0042 
3 
0681 
11 
0105 
December 
11 
17-39 
16 
2-97 
11 
0305 
19 
0028 
8 
1177 
16 
0083 
Inclinometer. 
TABLE XXXIV. — Monthly Means of the Observations of the Inclinometer for the Magnetic Dip. 
Month. 
No. of Observations. 
Magnetic Dip. 
A.M. 
P.M. 
23i> Gottingen. 
4 h Gottingen. 
Mean of all. 
1843. 
O 
o 
o 
t 
January 
5 
4 
71 
20-94 
71 
21-69 
71 
21-27 
February 
4 
3 
71 
23-17 
71 
21-90 
71 
22-62 
March 
2 
5 
71 
21-46 
71 
22-29 
71 
22-04 
April 
4 
3 
71 
21-76 
71 
22-85 
71 
22-23 
May 
2 
4 
71 
22-40 
71 
22-57 
71 
22-52 
June 
5 
5 
71 
23-67 
71 
23-65 
71 
23-66 
July 
3 
4 
71 
25-64 
71 
29-50 
71 
27-85 
August 
4 
5 
71 
23-67 
71 
19-53 
71 
21-37 
September 
1 
2 
71 
25-94 
71 
21-43 
71 
22-94 
October 
2 
2 
71 
30-40 
71 
27-06 
71 
28-73 
November 
) 2 
4 
71 
25-58 
71 
26-20 
71 
25-99 
December 
4 
5 
71 
25-32 
71 
26-27 
71 
25-85 
The Year 
38 
46 
71 
23-72 
71 
23-69 
71 
23-70 
The inclinometer worked very imperfectly after the month of June, see Introduction, § 8. No correction 
has been applied for the error of axle, as in the previous year, when a correction of — 12' was made. 
o / 
The mean magnetic dip for the first six months of 1842, uncorrected, was 71 24' 39 
1843, is 71 22-39 
the year 1842, was 71 23-95 
1843, is 71 23-70 
