ON TERRESTRIAL GALVANIC CURRENTS. 
225 
Table VI. — Diurnal Magnetic Inequality in West Direction, inferred from Galvanic 
Earth- Currents. The unit is 0-00001 of Total Horizontal Magnetic Force. 
Hours. 
1866 and 1867. 
January. 
1867. 
February. 
1867. 
March. 
1865 and 1867. 
April. 
1866 and 1867. 
May. 
1866 and 1867. 
J une. 
1865 to 1867. 
July. 
1865 to 1867. 
August. 
1865 to 1867. 
September. 
1865 to 1867. 
October. 
1865 to 1867. 
November. 
1865 to 1867. 
December. 
Mean of the Inequality for the twenty-four hours. 
+ 133 
+ 144 
+ 143 
+ 103 
+ 105 
+ 88 
+ 96 
+ 110 
+ 103 
+ 103 
+ 122 | 
+ 129 
Simple Diurnal Inequality (to be 
multiplied by 0‘526). 
0 
+ 10 
+ 25 
+ 11 
+ 18 
+ 25 
+ 17 
+ 29 
+ 27 
+ 25 
+ 15 
+ 
7 
+ 7 
1 
+ 8 
+ 29 
+ 16 
+ 25 
+ 31 
+ 23 
+ 36 
+ 31 
+ 26 
+ 15 
+ 
8 
+ 4 
2 
+ 5 
+ 30 
+ 19 
+ 30 
+ 34 
+ 26 
+ 40 
+ 33 
+ 27 
+ 14 
+ 
8 
+ 2 
3 
+ 2 
+ 28 
+ 20 
+ 34 
+ 35 
+ 27 
+ 41 
+ 35 
+ 27 
+ 12 
+ 
8 
-1 
4 
+ 1 
+ 26 
+ 21 
+ 36 
+ 34 
+ 27 
+ 40 
+ 33 
+ 23 
+ 12 
+ 
7 
-1 
5 
- 2 
+ 24 
+ 20 
+ 33 
+ 32 
+ 24 
+ 36 
+ 28 
+ 19 
+ 8 
+ 
6 
-3 
6 
- 5 
+ 18 
+ 19 
+ 29 
+ 26 
+ 21 
+ 29 
+ 20 
+ 14 
+ 4 
+ 
4 
-5 
7 
- 8 
+ 10 
+ 15 
+ 24 
+ 18 
+ 16 
+ 19 
+ 15 
+ 7 
- 1 
+ 
2 
-7 
8 
-10 
+ 1 
+ 9 
+ 17 
+ 10 
+ 9 
+ 10 
+ 7 
- 2 
- 4 
0 
-7 
9 
- 9 
- 6 
+ 5 
+ 9 
+ 1 
+ 2 
0 
- 4 
- 7 
- 6 
— 
1 
-7 
10 
-10 
-12 
0 
0 
- 8 
- 5 
-12 
- 13 
-13 
- 9 
— 
3 
-7 
11 
-10 
-18 
- 6 
-10 
-17 
-11 
-21 
-20 
-20 
-14 
— 
5 
-7 
12 
-10 
-25 
-11 
-18 
-25 
-17 
-29 
-27 
-25 
-15 
— 
7 
-7 
13 
- 8 
-29 
-16 
-25 
-31 
-23 
-36 
-31 
-26 
-15 
— 
8 
-4 
14 
- 5 
-30 
-19 
-30 
-34 
-26 
-40 
-33 
-27 
- 14 
— 
8 
-2 
15 
- 2 
-28 
— 20 
-34 
-35 
-27 
-41 
-35 
-27 
-12 
— 
8 
+ 1 
16 
- 1 
-26 
-21 
-36 
-34 
-27 
-40 
-33 
-23 
-12 
— 
7 
+ 1 
17 
+ 2 
04 
-20 
-33 
-32 
— 24 
-36 
-28 
-19 
- 8 
— 
6 
+ 3 
18 
+ 5 
-18 
-19 
-29 
-26 
-21 
-21 
-20 
-14 
- 4 
— 
4 
+ 5 
19 
+ 8 
-10 
— 15 
-24 
- 18 
-16 
-19 
-15 
- 7 
+ 1 
— 
2 
+ 7 
20 
+ 10 
— 1 
- 9 
-17 
-10 
- 9 
-10 
- 7 
+ 2 
+ 4 
0 
+ 7 
21 
+ 9 
+ 6 
- 5 
- 9 
- 1 
- 2 
0 
+ 4 
+ 7 
+ 6 
+ 
1 
+ 7 
22 
+ 10 
+ 12 
0 
0 
+ 8 
+ 5 
+ 12 
+ 13 
+ 13 
+ 9 
+ 
3 
+ 7 
23 
+ 10 
+ 18 
+ 6 
+ 10 
+ 17 
+ 11 
+ 21 
+ 20 
+ 20 
+ 14 
+ 
5 
+ 7 
Semidiurnal Inequality (to be multiplied by 0*6 1 6y. 
0 12 
-11 
- 4 
+ 7 
+ 9 
+ 7 
+ 4 
+ 3 
+ 4 
+ 10 
+ 7 

1 
-2 
1 13 
- 1 
+ 7 
+ 11 
+ 13 
+ 12 
+ 10 
+ 8 
+ 9 
+ 13 
+ 7 
+ 
5 
0 
2 14 
+ 7 
+ 15 
+ 10 
+ 13 
+ 13 
+ 12 
+ 10 
+ 11 
+ 13 
+ 6 
+ 11 
+ 2 
3 15 
+ 12 
+ 18 
+ 7 
+ 11 
+ 11 
+ 12 
+ 9 
+ 11 
+ 12 
+ 5 
+ 13 
+ 6 
4 16 
+ 16 
+ 17 
+ 5 
+ 9 
+ 10 
+ 10 
+ 8 
+ 12 
+ 10 
+ 6 
+ 13 
+ 8 
5 17 
+ 15 
+ 1 6 
+ 1 
+ 5 
+ 7 
+ 5 
+ 6 
+ 12 
+ 6 
+ 4 
+ 
9 
+ 9 
6 18 
+ 11 
+ 11 
- 4 
- 2 
+ l 
- 1 
+ 3 
+ 4 
- 4 
0 
+ 
3 
+ 5 
7 19 
+ 4 
0 
- 8 
-11 
-10 
- 9 
- 3 
- 7 
- 14 
- 6 
— 
5 
0 
8 20 
- 5 
-14 
-13 
-18 
-16 
-14 
- 10 
-16 
-19 
-18 
— 
12 
-6 
9 21 
-12 
— 24 
-14 
-19 
-18 
— 15 
-14 
- 18 
-20 
- 10 
— 
14 
-7 
10 22 
-16 
-25 
- 9 
-13 
-13 
-13 
- 12 
-13 
-11 
- 5 
— 
12 
-7 
11 23 
-16 
-16 
+ 1 
- 1 
- 3 
- 4 
- 5 
- 4 
+ 1 
+ 3 
- 
8 
-6 
Tertio-diurnal Inequality (to be multiplied by 0-804). 
0 8 16 
+ 5 
+ 4 
+ 5 
+ 10 
+ 5 
+ 4 
+ 10 
+ 8 
+ 6 
+ 6 
0 
— 1 
1 9 17 
+ 5 
+ 3 
+ 6 
+ 5 
+ 2 
+ 2 
4- 4 
+ 7 
+ 4 
+ 4 
+ 
1 
0 
2 10 18 
+ 2 
0 
+ 4 
- 2 
- 2 
- 1 
- 4 
+ l 
- 1 
0 
+ 
1 
0 
3 11 19 
2 
- 3 
0 
- 8 
- 5 
- 4 
-10 
- 5 
- 6 
- 3 
+ 
1 
+ 1 
4 12 20 
- 5 
- 4 
- 5 
-10 
- 5 
- 4 
-10 
- 8 
- 6 
- 6 
0 
+ 1 
5 13 21 
- 5 
- 3 
- 6 
- 5 
- 2 
- 2 
- 4 
- 7 
- 4 
— 4 
— 
1 
0 
6 14 22 
- 2 
0 
- 4 
+ 2 
+ 2 
+ 1 
+ 4 
- 1 
+ 1 
0 
— 
1 
0 
7 15 23 
+ 2 
+ 3 
0 
+ 8 
+ 5 
+ 4 
+ 10 
+ 5 
+ 6 
+ 3 
— 
1 
-1 
