HorizontTaL COMPONENT OF MAGNETIC Force, 1845. 17 
| TABLE XXX.—Mean Difference of a Single Observation of the Bifilar Magnetometer from the 
Monthly Mean at the corresponding Hour, for each Hour in each Month in 1845. 
a4 Jan. Feb. | March.} April. | May. | June. | July. | Aug. | Sept. Oct. Nov. | Dec. Year. 
| ey 
h. Se. Div. | Sc. Div. | Sc. Diy. | Sc. Div. | Sc. Diy. | Se. Diy. | Se. Div. | Se. Div. | Se. Div. | Sc. Div. | Sc. Div. | Se. Div. |] Sc. Div. 
12 5-82 | 4-31 | 3:59 | 8-02 | 3-91 | 2-04 | 2-53 | 3-40] 5-72 | 5-62 | 2-52 | 6.94 |) 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 | 400 | 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 |} 280 | 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 | 3-12 | 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 
6 3-43 | 4-22] 3.00 | 2.27 | 3-55 | 3-50 | 2-98 | 2.22 | 2-32 | 2-71 | 3-70 | 13-27 || 3.93 
7 5-11 | 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 anp 1846. E 
