DIURNAL VARIATIONS OF TERRESTRIAL MAGNETISM. 
71 
Table T. —Mean Residuals, ^ (Spring + Autumn) and \ (Summer + Winter) combined, 
for the Two Years 1905 and 1902 taken together. 
r~y 
West. 
North. 
Radial. 
a. 
b. 
a. 
b. 
a. 
b. 
24-hour Component. 
- 4 
- 19 
- 18 
6 
-42 
-28 
1 
- 17 
- 62 
- 1 
-24 
1 
17 
— 2 
42 
1 
- 7 
8 
6 
ii 
- 102 
42 
- 25 
- 11 
- 18 
12 
- 52 
56 
16 
10 
- 6 
12 
27 
21 
28 
2 
8 
-36 
8 
- 12 
-57 
11 
_ 2 
- 17 
10 
15 
-56 
-20 
14 
36 
16 
- 22 
12-hour Component. 
- 5 
- 5 
11 
- 4 
_ 2 
6 
6 
- 11 
4 
- 8 
3 
3 
3 
■ 4 
20 ' 
5 
1 
3 
15 
2 
36 
42 
4 
- 8 
0 
0 
— 2 
52 
2 
11 
12 
- 7 
5 
12 
6 
-21 
11 
-32 
- 22 
3 
- 14 
-14 
20 
-24 
- 32 
- 10 
24 
- 3 
18 
21 
16 
- 16 
8-hour Component. 
- 1 
1 
2 
2 
1 
2 
1 
2 
2 
6 
4 
4 
10 
- i 
17 
14 
4 
4 
O 
9 
0 
24 
_ 2 
0 
4 
3 
7 
30 
- i 
2 
10 
- 10 
i 
1 
- i 
- 15 
6 
- 15 
- 3 
7 
- 15 
- 9 
16 
-20 
26 
- 14 
24 
4 
17 
- 14 
16 
4 
6-hour Component. 
- 1 
4 
1 
0 
4 
3 
0 
4 
2 
2 
o 
O 
2 
4 
1 
■9 
6 
2 
i 
0 
- 7 
7 
' 5 
— 2 
- i 
0 
nr 6 
7 
6 
- i 
i 
0 
9 
_ 2 
0 
- 4 
- 5 
- 1 
- 5 
_ 2 
9 
- 5 
- 2 
10 
- 7 
4 
- 8 
7 
4 
4 
- 14 
- 8 
4 
