Horizontal Component of Magnetic Force, 1845. 
TABLE XXX. — Mean DiflFerence of a Single Observation of the Bifilar Magnetometer from the 
Monthly Mean at the corresponding Hour, for each Hour in each Month in 1845. 
Mak. 
M. T. 
Jan. 
Feb. 
March. 
April. 
Slay. 
June. 
July. 
Aug. 
Sept. 
Oct. 
Nov. 
Dec. 
Year. 
h. 
12 
Sc. Div. 
5-82 
Sc. Div. 
4-31 
Sc. Div. 
3-59 
Sc. Div. 
8-02 
Sc. Div. 
3-91 
Sc. Div. 
2-04 
Sc. Div. 
2-53 
Sc. Div. 
3-40 
Sc. Div. 
5-72 
Sc. Div. 
5-62 
Sc. Div. 
2-52 
Sc. Div. 
6-94 
Sc. Div. 
4-54 
13 
6-11 
4-86 
4-03 
8-93 
3-57 
2-70 
2.68 
3-60 
4-51 
3-20 
2-63 
6-32 
4-43 
14 
14-29 
4-37 
6-14 
18-24 
3-44 
2-47 
2-08 
4-87 
4-11 
3-30 
2-23 
5-19 
5-89 
15 
4-46 
4-00 
3-67 
4-38 
4-34 
2-84 
2-89 
3-38 
4-05 
2-50 
2-44 
4-48 
3-62 
16 
4-31 
3-05 
5-29 
5-14 
3-19 
2-80 
3-69 
2-63 
3-78 
2-61 
2-80 
3-28 
3-55 
17 
3-50 
3-63 
3-27 
3-90 
3-55 
2-07 
2-65 
3-42 
4-48 
3-03 
2-46 
3-87 
3-32 
18 
2-63 
2-93 
2-42 
3-61 
3-81 
2-27 
2-92 
3-77 
4-89 
3-30 
2-94 
3-24 
3-23 
19 
2-95 
3-10 
3-10 
3-38 
4-62 
2-60 
2-81 
4-35 
5-48 
1-99 
4-17 
3-04 
3-47 
20 
3-19 
3-28 
3-58 
3-42 
4-41 
3-00 
3-46 
5-22 
5-58 
3-43 
3-49 
3-30 
3-78 
21 
3-80 
5-59 
2-95 
3-53 
3-25 
3-10 
312 
4-38 
3-49 
3-47 
4-99 
3-84 
3-79 
22 
4-73 
3-62 
3-65 
3-72 
2-58 
3-61 
4-49 
5-12 
4-51 
2-89 
3-82 
3-88 
3-88 
23 
4-10 
3-40 
2-56 
4-16 
3-46 
3-94 
4-57 
5-05 
4-19 
4-29 
4-64 
4-39 
4-06 
0 
4-79 
4-77 
2-80 
2-98 
3-70 
4-04 
3-58 
4-90 
3-32 
4-07 
3-61 
5-43 
4-00 
1 
3-82 
3-52 
2-41 
3-67 
3-30 
3-35 
4-33 
5-70 
3-77 
4-48 
3-65 
4-11 
3-84 
2 
3-94 
2-90 
2-39 
4-08 
4-03 
3-91 
3-31 
6-50 
4-80 
3-60 
3-93 
3-96 
3-95 
3 
2-53 
2-99 
2-27 
4-42 
4-12 
3-76 
3-98 
6-36 
4-77 
3-20 
2-73 
3-21 
3-70 
4 
3-33 
2-90 
4-42 
4-61 
4-66 
3-56 
2-66 
4-77 
5-31 
3-13 
4-73 
3-53 
3-97 
5 
3-63 
3-08 
1-77 
2-93 
3-68 
3-80 
3-65 
2-97 
3-16 
2-68 
3-82 
4-09 
3-27 
0 
4.99 
9 97 
9 OS 
9.99 
9.71 
13-27 
3-93 
7 
511 
2-55 
3-22 
2-54 
3-04 
3-28 
3-17 
2-62 
4-06 
2-53 
4-76 
6-62 
3-62 
8 
4-53 
3-42 
4-02 
3-63 
2-61 
2-05 
3-00 
3-33 
5-73 
2-20 
4-69 
6-69 
3-82 
9 
7-32 
4-39 
4-19 
3-01 
3-19 
2-34 
2-61 
4-34 
3-38 
3-29 
4-65 
5-71 
4-03 
10 
8-07 
3-82 
3-77 
3-80 
2-74 
2-20 
2-99 
2-83 
4-91 
4-54 
3-55 
5-82 
4-09 
11 
9-25 
3-66 
3-33 
3-17 
3-40 
3-09 
2-52 
3-20 
4-39 
5-00 
2-92 
5-41 
4-11 
MAG, 
. AND MET. OBS. 
1845 AND 1846. 
E 
