470 
PROFESSOR A. SCHUSTER ON THE DIURNAL 
Table II.—Force to Magnetic North. 
Coefficients in the expansion 
riy cos ^ sin ^ + tto cos 2t + h sin ‘It + % cos 3^ -f- 63 sin M + a^cos it + h^sin it. 
The unit of force is 1 C.G.S. X 10“®; t being astronomical time. 
Bombay. 
Lisbon. 
Greenwich. 
St. Petersburg. 
Summer. 
Winter. 
Summer. 
W 
nter. 
Summer. 
W 
liter. 
Summer. 
w 
nter. 
4- 
386-9 
+ 
332-5 
124-2 
78-6 
213-7 
117-4 
257-9 
in-8 
h 
+ 
5-7 
+ 
38-2 
+ 
71-5 
— 
15-0 
+ 
154-0 
+ 
22-8 
+ 
150-2 
— 
5-8 
«2 
+ 
J.52'7 
+ 
125-0 
— 
28-3 
— 
54-8 
— 
112-6 
— 
87-5 
— 
149-1 
— 
69-0 
h 
— 
11-8 
+ 
7-3 
+ 
43-0 
— 
0-9 
+ 
78-9 
+ 
24-6 
+ 
45-7 
— 
12-8 
+ 
41-1 
+ 
.39-6 
+ 
23-1 
— 
2-3 
— 
2-3 
— 
16-4 
— 
15-8 
— 
18-4 
h 
— 
41-8 
— 
31-4 
+ 
19-0 
+ 
19-0 
+ 
27-1 
+ 
27-1 
+ 
39-7 
22-9 
— 
4-3 
+ 
15-3 
+ 
12-2 
+ 
6-9 
+ 
12-1 
+ 
2-0 
— 
9-0 
— 
3-8 
h 
— 
13-7 
— 
21-1 
— 
12-3 
+ 
18-8 
+ 
8-4 
+ 
16-6 
+ 
3-3 
+ 
6-4 
Table III.—Force to Geographical West. 
Coefficients in the expansion 
cos t sin t + % cos 2t + 63 sin 2 i + a 3 cos 3t + 63 sin 3t + cos it sin it. 
The unit of force is 1 C.G.S. X 10“®; f being astronomical time. 
Bombay. 
Lisbon. 
Greenwich. 
St. Petersburg. 
Summer. 
Winter. 
Summer. 
Winter. 
Summer. 
Winter. 
Summer. 
Winter. 
“1 
+ 
57-5 
+ 
0-4 
+ 
74-3 
+ 
86-5 
+ 
85-4 
105-4 
+ 
99-6 
+ 
91-6 
-f 
116-4 
+ 
32-5 
+ 
2-25-3 
+ 
119-1 
+ 
233-3 
+ 
114-6 
+ 
224-6 
+ 
96-4 
dc) 
+ 
131-6 
4-3 
+ 
108-3 
+ 
31-1 
+ 
83-1 
+ 
1-0 
+ 
98-7 
— 
15-3 
h 
+ 
59-7 
+ 
23-1 
+ 
157-7 
+ 
103-8 
+ 
134-6 
+ 
87-4 
+ 
114-8 
P 
69-1 
^3 
+ 
102-8 
+ 
39-7 
+ 
78-5 
+ 
47-0 
+ 
61-1 
+ 
30-5 
+ 
37-3 
P 
21-2 
h 
+ 
7-8 
+ 
8-1 
+ 
59-3 
+ 
54-4 
+ 
49-2 
+ 
380 
+ 
60-6 
P 
29-7 
+ 
15-6 
+ 
32-8 
+ 
16-6 
+ 
31-2 
+ 
12-9 
+ 
20-7 
■P 
2-5 
P 
6-1 
h, 
— 
18-5 
— 
9-2 
— 
9-8 
+ 
25-6 
+ 
5-3 
+ 
22-2 
+ 
11-0 
P 
13-9 
