Extreme Positions. 
255 
XXIX. — Differences of the Extreme Readings of the Three Magnetometers from the Monthly Means 
during the Extra Observations in 1843, together with the Ranges of the Three Magnetic Elements 
during each of the Observed Disturbances. 
1843. 
Jan. 2 
Jan. 11 
Feb. 6 
Feb. 13 
Feb. 14 
Feb. 16 
Feb. 23 \ 
Feb. 24/ 
Feb. 25 
Mar. 4 
Mar. 6 
Mar. 7 
Mar. 9 
Mar. 10 
Mar. 11 
Mar. 12 
Mar. 18 
Mar. 21 
Mar. 22 
Mar. 29 
Apr. 5 
Apr. 6 
Apr. 7 
Apr. 8 
Apr. 12 
Apr. 13 
Apr. 18 
May 6 
May 7 
May 10 
May 15 
June 2 
June 7 
June 13 
June 30 
July 1 
July 4 
July 24 
July 24 
July 25 
Aug. 3 
Aug. 3 I 
Aug. 4 } 
Aug. 8 
Aug. 22 
Sept. 1 
Sept. 1 
Sept. 2 
Sept. 18 
Sept. 19 
Oct. 4 \ 
Oct. 5 J 
Oct. 16 
Oct. 17 
Oct. 26 
Nov. 2 
Nov. 3 
Dec. 6 
Dec. 8 
Dec. 11 
Dec. 12 
Dec. 13 
Dec. 27 
Dec. 28 
Westerly Declination. 
Bifilar Magnetometer. 
Balance Magnetometer. 
Ranges. 
Greater than 
Mean. 
Less than 
Mean. 
Reading greater 
than Mean. 
Reading less 
than Mean. 
Read 
th 
ing greater 
in luean. 
Reading: less 
than Mean. 
Declina- 
tion. 
Horizontal 
component. 
h. 
n. 
Sc. Div. 
h. 
Sc Div. 
h. 
Mic. Div. 
h. 
Alio. i/iv. 
X=l. 
6 
+ 0-03 
6 
-20-42 
6 
+ 
io*y 
6 
- 6-8 
6 
+ 105-6 
6 
+ 71-0 
20-45 
0-00242 
9 
+ 0-14 
9 
-17-42 
9 
— 
i . i 
14 
9 
— 32-2 
9 
+.119-4 
10 
+ 36-3 
17-56 
•00314 
8 
+ 6-15 
10 
-36-75 
10 
+ 
1 o 
10 
- 22-9 
10 
+ 77-4 
11 
+ 12-6 
45-81 
•00247 
11 
+ 1-59 
10 
-13-58 
11 
+ 
o.c 
Z'O 
10 
- 11-0 
10 
+ 12-S 
11 
+ 7-0 
15-17 
■00135 
10 
+ 1-61 
9 
-17-22 
9 
+ 
27*9 
10 
- 14-5 
8 
+ 20-3 
9 
- 24-5 
17-38 
•00438 
6 
+ 1-42 
8 
-13-49 
8 
+ 
114 
8 
- 8-5 
8 
+ 7-8 
6 
- 5-8 
16-86 
•00203 
20 
- 22-5 
j _~ 
25-70 
J 
•00438 
4 
+ 16'03 
9 
- 4-53 
5 
+ 
* 
19*9 
8 
— 22-5 
7 
+ 148-3 
11 
+ 2-38 
10 
-12-66 
10 
+ 
on.o 
11 
- 28-7 
11 
- 3-5 
10 
- 27-8 
15-04 
•00602 
11 
+ 1-38 
11 
_ 8-78 
11 
+ 
OO 
12 
- 11-2 
10 
+ 34-4 
11 
+ 3-5 
10-16 
•00169 
14 
+ 11-24 
11 
-17-77 
14 
+ 
on.o 
17 
- 40-4 
9 
+ 37-7 
17 
-128-3 
29-41 
•00708 
4 
+ 10-94 
8 
- 8-49 
5 
+ 
OA. O 
zv o 
8 
- 27-6 
8 
+ 292-7 
0 
+ 31-1 
23-90 
•00510 
8 
+ 1-87 
7 
- 2-68 
6 
+ 
Q.O 
7 
- 16-3 
7 
+ 51-0 
6 
+ 20-3 
4-01 
•00200 
9 
+ 2-01 
8 
- 2-95 
8 
+ 
23-5 
10 
- 0-3 
10 
+ 14-6 
8 
- 10-4 
3-86 
•00254 
8 
— 2-24 
10 
- 8-04 
9 
+ 
16-1 
9 
- 19-9 
10 
+ 13-6 
9 
- 16-4 
8-00 
•00367 
13 
+ 8-02 
7 
-39-59 
5 
+ 
19-6 
14 
- 45-6 
7 
+ 37-3 
14 
-211-7 
45-02 
•00731 
3 
+ 8-13 
6 
- 11-23 
6 
+ 
32-1 
0 
- 1-0 
6 
+ 51-0 
o 
- 6-5 
23-37 
•00465 
8 
+ 1-96 
9 
- 8-03 
8 
+ 
22-6 
9 
- 2-4 
8 
- 24-1 
9 
- 33-2 
11-09 
•00260 
3 
+ 7-80 
0 
+ 1-82 
3 
+ 
19-8 
0 
- 7-6 
4 
- 1-3 
1 
- 25-7 
7-98 
•00383 
6 
+ 2-24 
11 
-20-76 
10 
+ 
18-2 
11 
- 31-1 
/ 
+ i_o y 
10 
-142-5 
Zb Zi) 
• AAS^At! 
7 
+ 35-43 
11 
-25-84 
5 
+ 
151-0 
13 
-125-7 
6 
+ 517-8 
13 
-259-1 
6301 
•02927 
3 
+ 13-32 
10 
-16-93 
4 
+ 
18-3 
14 
-115-6 
3 
+ 157-4 
14 
-386-8 
38-58 
•01445 
18 
+ 3-44 
8 
-18-74 
8 
+ 
44-1 
9 
- 12-9 
g 
+ 43-5 
18 
- 36-2 
21-22 
• AAff AQ 
4 
+ 0-87 
5 
-10-45 
6 
+ 
12-8 
7 
- 4-2 
O 
+ DO O 
4 
+ 28-0 
lo 48 
• A.AOAQ 
6 
+ 9-48 
9 
-15-00 
6 
+ 
17-9 
9 
- 14-9 
7 
+ 111-1 
2 
+ 6-7 
26-66 
•00423 
20 
+ 4-78 
18 
+ 0-35 
20 
+ 
5-9 
19 
- 24-3 
18 
+ 15-0 
19 
- 51-9 
3-74 
•00303 
6 
+ 1-66 
7 
-12-61 
7 
+ 
16-2 
7 
- 1-1 
■7 
i 
+ yo i 
8 
+ 22-7 
15-14 
-00177 
12 
+ 12-85 
12 
-90-29 
8 
+ 
5-4 
11 
-417-0 
LI 
+ ulO 4 
11 
-685-5 
lAO.l l 
•04278 
11 
+ 10-01 
14 
- 8-04 
11 
38-3 
13 
- 52-2 
11 
— / 1 u 
14 
-154-3 
1 Q.-7/1 
JLo /U 
UUiOO 
2 
+ 0-44 
6 
- 8-02 
6 
+ 
33-2 
3 
- 25-9 
7 
+ 40-6 
2 
+ 14-9 
13-63 
•00665 
8 
+ 0-28 
9 
-10-95 
8 
+ 
21-1 
9 
- 13-0 
9 
+ 175-6 
8 
+ 21-6 
11-78 
•00389 
22 
+ 11-46 
20 
_ 4-77 
20 
1-9 
21 
_ 43-6 
oi 
Zl 
— 1 u 
22 
- 42-2 
19-06 
•00449 
10 
+ 7-35 
11 
-11-97 
11 
+ 
15-5 
12 
- 28-1 
1 ft 
— O 
12 
- 90-0 
1 Q.QO 
±y oz 
vyj'tZv 
7 
+ 0-88 
6 
- 3-48 
7 
+ 
25-2 
6 
- 19-7 
6 
+ 53-7 
8 
+ 20-1 
3-95 
•00461 
18 
+ 3-45 
20 
- 4-16 
20 
+ 
0-2 
21 
- 16-2 
21 
- 12-7 
18 
- 80-0 
8-74 
•00200 
6 
+ 3-49 
8 
- 4-28 
8 
+ 
28-3 
9 
- 7-8 
8 
+ 13-8 
6 
+ 2-0 
9-44 
•00389 
8 
+ 3-67 
9 
- 8-64 
9 
+ 
22-8 
10 
+ 5-5 
9 
+ 10-8 
10 
+ 13-7 
12-34 
•00205 
7 
+ 1-64 
10 
-2920 
6 
+ 
51-4 
10 
22 
- 32-0 
- 50-1 
9 
+ 51-1 
10 
- 60-1 
33-73 
•00912 
5 
+ 29-61 
11 
-10-87 
3 
+ 121-5 
11 
- 80-3 
3 
+ 321-4 
11 
-129-4 
45-49 
•00199 
4 
+ 2-93 
6 
- 1-39 
4 
+ 
22-2 
6 
- 2-0 
6 
- 19-4 
4 
- 39-6 
8-00 
■00222 
22 
- 20-7 
6 
+ 133-2 
0 
- 23-0 
23-66 
•00696 
1 
+ 6-75 
+ 24-00 
6 
- 11-23 
6 
+ 
22-6 
16-6 
18 
20 
+ 1-01 
19 
+ 
18 
- 42-0 
OO 
ZZ 
— OO 1 
19 
-211-8 
24-31 
•00557 
1 
+ 12-74 
6 
+ 4-47 
3 
+ 
28-0 
1 
- 20-8 
6 
+ 74-9 
5 
- 36-8 
13-95 
•00581 
3 
+ 7-40 
+ 13-00 
6 
- 4-17 
5 
+ 
21-4 
4 
- 21-7 
- 22-2 
16-50 
■00409 
•00390 
20 
20 
6 
- 0-93 
4 
+ 
+ 
5-0 
| 12.19 
12 
+ 10-10 
10 
-12-48 
11 
30-7 
12 
- 21-4 
10 
- 14-2 
12 
-100-6 
22-58 
•00514 
10 
+ 6-60 
7 
-14-10 
11 
+ 
28-9 
10 
- 8-2 
7 
+ 32-7 
11 
- 58-3 
17-33 
•00361 
23 
+ 8-77 
23 
+ 3-1 
| 30-13 
•00664 
8 
-17-92 
8 
+ 
+ 
24-7 
6 
+ 26-8 
0 
- 69-6 
10 
+ 3-86 
10 
_ 6-41 
10 
38-1 
10 
+ 2-8 
10 
+ 14-9 
11 
- 1-6 
10-27 
•00348 
4 
+ 1-18 
2 
_ 9-94 
4 
3-7 
2 
- 15-8 
2 
+ 80-2 
3 
+ 49-6 
8-59 
•00159 
4 
- 1-15 
10 
-18-10 
7 
+ 
19-4 
7 
- 14-1 
6 
+ 90-8 
11 
+ 3-5 
22-32 
•00330 
12 
+ 0-28 
11 
- 14-45 
11 
+ 
7-9 
11 
- 32-1 
10 
+ 16-2 
12 
- 88-8 
14-73 
•00394 
1 
+ 5-57 
8 
— 4-22 
8 
+ 
3-9 
0 
- 10-3 
o 
+ 32-6 
23 
+ 1-9 
13-90 
■00237 
8 
+ 2-10 
8 
- 7-18 
8 
+ 
2-9 
10 
- 10-8 
9 
+ 12-0 
11 
- 22-2 
9-28 
•00153 
9 
+ 8-70 
9 
- 22-07 
6 
4-2 
9 
- 46-5 
8 
+ 1-5 
10 
- 3-9 
30-77 
•00461 
7 
+ 7-85 
8 
-11-22 
11 
+ 
23-4 
12 
- 5-0 
6 
+ 21-3 
12 
- 61-0 
20-30 
•00302 
2 
+ 6-97 
6 
- 9-55 
7 
+ 
8-3 
2 
- 20' 9 
4 
+ 39-3 
10 
- 16-8 
19-21 
•00312 
10 
+ 4-59 
8 
- 3-65 
10 
+ 
5-7 
8 
- 9-7 
8 
+ 28-0 
10 
+ 0-7 
7-66 
•00148 
23 
+ 
3-0 
23 
- 2-1 
| 9-59 
•00170 
3 
+ 9-12 
4 
+ 0-21 
2 
- 13-9 
4 
+ 33-2 
Vertical 
component. 
Y=l. 
