Table II. (a) (4) Fourier Coefficients of the Solar Diurnal Magnetic Variation at the Solstices. 
(a) Sunspot Maximum, 1905. 
88 
DR. S. CHAPMAN ON THE SOLAR AND LUNAR 
Radial. 
Winter. 
T* -4* 
1 1 
~~ o 
1 
r-H O 
1 
-ti CO 
1 1 
iro co 
1 1 
- 
Ti- 
ID 
Summer. 
04 CO rH 
O <N H 
1 
CO r-H 
.1-1 
! 
lO -+ 
1 1 
CO ID 
r-H 
l 
i 
rH lO 
1 
Winter. 
r-H CO 00 
1 
^ CO CO' 
CO 
i - 
2 S 
L0 rH 
1 
X 
1 
- « 
Summer. 
(J 
z 
8 
X Cl o 
1 
o o 
04 r-H 
1 
1 
C0 O 
1 
04 
1 
rt> rH 
r-H r—H 
1 
Winter. 
OOJCl 
05 00 
Tt- lO 
05 ^ 
lO CO 
1 
- 
i 
'rh 05 
' ' 
i 
North. 
Summer. 
O O 1C 
1 I 
Cl CO H 
1 
r* ZD 
r-H C5 
^ )Q 
c0' oi 
1 
O 
GO 
1 
*- 
Winter. 
I'M ^ ZD 
i i i 
lO 00 CM 
1 1 1 
CO r-H 
1 
05 ^ 
r-H 
1 1 
-+ 
1 
~t "N 
1 
05 O 
i . 
Summer. 
O CO 
r-H 
1 
04 GO oq 
CO 
r-H 
D- I>* 
r-H 
O 04 
l—H 
04 04 
cc 
04 O 
1 
00 
r-H 
! 
Winter. 
^ oo oo 
i—H r-H 
r-H (-H r-H 
05 r* 
r-H rH 
^ X 
X t- 
04 04 
0 4 05 
04 
1 
c 
- l 
-14 
CO 
V 
H-> 
ril 
r-H 
<D 
3 
m 
05 D- r-H 
1 
00 rH ^ 
1 
O r-H 
1 
to & 
i—H 
• ' 
lO i-H 
rH 04 
1 1 
i i 
- 14 
tJ* lO 
00 04 
1 1 
r-H 
1 
& 
o 
• 
CO o co 
•CO X ^ 
r—H r—H 
19 
15 
CO 
05 CO' 
04 ^h 
1 
CO o 
1 1 
o 
s 
Summer. 
co o co 
r-H T* 04 
1 1 
CO OI 
rH X 
I 
00 rH 
t- o 
- 
O CO 
J“H 
Observatory 
No. 
h Cl CO ^ ia> ZD 
t'- X 
05 O 
r-H 
r-H 04 
00 ^ U0 
rH r-H r-H 
CO i>- 
i—H l—H 
X 05 o 
r-H r-H 04 
r-H 
04 
1 —- 
i 
Group No. 
HH 
HH 
HH 
HH 
HH 
K> 
HH 
. _ . . . .. 
> 
HH 
> 
VII. 
11 
VIII. 
x 
HH 
+3 
(H 
r*j 
o 
Oh 
0 
o 
O 
u 
O 
o 
I 
CO 
0) 
