Table I. (6) (2).—Fourier Coefficients of the Solar Diurnal Magnetic Variation at the Equinoxes. 
(6) .Sunspot Minimum, 1902. 
(2) The 12-hour Component. 
DIURNAL VARIATIONS OF TERRESTRIAL MAGNETISM. 
77 
j 
Radial. 
cs 
rO 
Autumn. 
r-H CO 
l 
r-H rH 05 
1 
o to 
to 
r-H 
1 
co 
Cl co 
Cl 
1 1 
Cl 
1 
h* Cl 
r-H 
1 1 
Spring. 
Cl 05 
O ^ to 
r-H 
1 
r-H O 
1 
o 
r-H 
1 
CO 
r—H 
oo t- 
i—H r—H 
1 1 
to 
CM 
1 
00 oo 
I 1 
CN1 
e 
Autumn. 
22 
• 20 
H CO O 
■nh i —i 
to 
CM CO 
33 
43 
53 
42 
-36 
t" 
1 1 
Spring. 
D- CM 
rH CM 
O CM i>- 
CO H CO 
GO r-H 
CO CO 
L— 
Cl 
37 
27 
49 
rH 
1 
O CM 
r-H 
\ 
North. 
©1 
r-o 
Autumn. 
CD Q O 
CM tO 
05 CO tO 
CM tO CM 
CO r— 1 
cm co 
05 
to to 
tO 00 
to 1—1 
D- 05 
rH 
1 I 
-32 
nh 
r-H rH 
1 
Spring. 
tO 00 CM 
^ CM 
Cl co o 
co 
1 
GO 05 
I-H 
. I 
r-H tO 
hH CO 
co to 
1>- r-H 
-35 
-27 
o 
co 
1 
© iO 
<M 
1 
Autumn. 
CO H rt< 
^ CO CM 
1 1 1 
to co CO 
nh co to 
1 1 1 
CO rH 
r-H 
1 
r—i <to 
CO hH 
1 1 
r—H 
00 CM 
72 
83 
09 
o 
! 
Spring. 
CO r—H 
1 1 1 
to co o 
CO CO Th 
1 1 1 
to o 
CM 
1 
05 
^ to 
1 1 
r-H U— 
CO CM 
to to 
d- o 
r—H 
r-H 
GO Cl 
^ to 
• 
West. 
t. 
03 
r-O 
Autumn. 
CO Ol> 
CO ^ o 
OOiCt 
D- to tO 
CM nfi 
co u- 
CO 00 
to u- 
tO tO 
to to 
33 
23 
- 77 
rH JO 
rH 00 
r-H 
1 1 
Spring. 
O) to Cl 
to 00 tO 
O to to 
iO to to 
to ^ 
to to 
i>- nh 
to 1— 
rH tO 
CO to 
24 
22 
- 77 
to CM 
CO rH 
r-H r— H 
1 1 
03 
Autumn. 
hH CO CM 
tO tO 
CM 05 CO 
1 ^ to 
CO D- 
00 00 
00 oo 
to go 
00 
82 
97 
53 
I— CO 
r—H 
1 
Spring. 
O r— 1 
CO H CM 
00 to N 
CO 
oo to 
CO 
to to 
t'- 05 
CO 
05 o 
r—H CO 
05 
r-H 
1 
to r-H 
1 i 
Observatory 
No. 
i— i CM CO 
to to 
u- oo 
05 O 
rH 
r-H Cl 
r-H r-H 
CO -rh to 
r-H r-H i—H 
to i>- 
r-H i—H 
'X) 05 o 
r-H t-H Cl 
Group No. 
hH 
HH 
HH 
HH 
HH 
HH 
IV. 
> 
HH 
> 
TIA 
VIII. 
