OF TERRESTRIAL MAGNETIC FORCE IN THE HORIZONTAL PLANE. 687 
expressed as factors of the Mean Horizontal Magnetic Force (continued). 
Mean Daily Range of Horizontal Force in the Direction Transversal to the Astronomical Meridian. 
Month. 
Range of 
Transversal 
Force. 
In Gottingen Mean Solar 
Time. 
Approximate Hour of 
Month. 
Maximum 
Easterly 
Force. 
Maximum 
Westerly 
Force. 
h. 
m. 
h. m. 
January . . 
June. . 
■0032 
21 
0 
3 0 
July . . . 
•0030 
19 
40 
2 50 
December . . 
January . . 
.Tune . . . 
•0027 
20 
50 
2 20 
July . . . 
•0026 
22 
0 
3 0 
December . . 
January . . 
June. . . 
•0021 
21 
0 
2 10 
July . . . 
•0017 
19 
50 
2 0 
December . . 
January . . 
June . . . 
•0022 
21 
0 
2 10 
July . . . 
•0022 
21 
0 
2 15 
December . . 
January . . 
June . . . 
•0013 
21 
0 
15 0 
July . . . 
•0011 
6 20 
In Greenwiel 
Tir 
2 0 
Mean Solar 
ne. 
December . . 
January . . 
June . . . 
•0022 
20 
40 
2 0 
July . . . 
•0028 
20 
0 
2 10 
December . . 
January . . 
June. . . 
•0036 
19 
30 
2 20 
July . . . 
•0032 
20 
0 
2 10 
December . . 
J anuary . . 
June . . . 
•0041 
19 
30 
1 30 
July . . . 
•0038 
19 
0 
•2 20 
December . . 
January . . 
June . . . 
•0034 
19 
30 
2 30 
July . . . 
Obser 
vations 
inter 
rupted. 
December . . 
January . . 
June . . . 
•0037 
19 
40 
2 0 
July . . . 
•0030 
20 
0 
3 30 
| December . . 
1 January . . 
June. . . 
•0033 
19 
50 
2 20 
July . . . 
•0030 
20 
0 
2 0 
December . . 
Range of 
Transversa 
Force. 
0014 
0015 
0019 
0013 
0015 
0012 
0010 
0013 
0014 
0012 
0012 
0014 
0013 
0014 
0012 
0018 
0015 
0019 
0020 
0011 
0026 
0020 
In Gottingen Mean Solar 
Time. 
Approximate Hour of 
Year. 
Maximum Maximum 
Easterly 
F orce. 
Westerly 
Force. 
h. m 
12 0 
10 20 
9 0 
10 0 
12 0 
9 20 
7 0 
9 0 
11 0 
9 40 
h. m. 
2 0 
■1853 
20 0 
1 0 
1 0 |j 
2 30 1 
1 0 
18 30 
1 3 
0 0 
1 30 
1854 
.1855 
■ 1856 
■1857 
In Greenwich Mean Solar 
Time. 
9 30 
9 30 
9 20 
10 0 
9 0 
10 0 
10 0 
10 0 
12 0 
13 0 
10 0 
10 0 
1 0 
2 0 
1 30 
1 30 
2 0 
2 0 
0 30 
1 0 
1 50 
1 30 
1 0 
1 0 
Observations interrupted during construction of the Magnetic Basement,, 
Greenwich Mean Solar Time for the same instant, 
4 T 2 
1858 
>1859 
.I860 
■ 1861 
•1862 
1863 
1864 
