Table III. (a) (a ).—Fourier Coefficients (Group Means) ol the Solar Diurnal Magnetic Variation, at 
Sunspot Maximum, 1905. 
90 
DR. S. CHAPMAN ON THE SOLAR AND LUNAR 
Equinoctial Component, \ (Spring + Autumn). 
Radial. 
Calculated. 
05 o H h o (M 
H (M (M Ol H H 
1 1 I 1 1 1 
CO. 
T—H 
(2) The 12-hour Component. 
© © >“”< r—l rH ©■ 
. I . 
© l-t 
Observed. 
■*+< O CO D- eO CO 
t— M CO CO 
1 1 I 1 1 
on oo 
1 
^ CD iO CD CD 
r-H --1 Ol 
1 1 
© Ol 
T“H 
1 1 
• 
Calculated. 
« 
lO 05 (M H 00 O 
lO lO o CD TH CO 
co d- 
i-H lO 
1 1 
rH GO CO GO Tf CD 
CO CO ^ CO 
CO cc 
r-H H^H 
1 1 
Observed. 
N 05 00 O OO'O 
Cl lO Cl CD 
1 
O lO 
05 H+< 
nH 
1 1 
GO r-H DO 05 05 00 
Ol -+ CO <M 
^ Ol 
to co 
1 1 
North. 
Calculated. 
-4-3 
*+ 05 lO N l'- CO 
CO r— . H riUD 
1 1 1 1 
COD rH 
i>- Ol ’*+ 
I 1 1 
O D 00 O D 
CO CO r-H Ol CO 
1 1 
05 rH lO 
^ co 
1 
Observed. 
© 
© 
o 
Gh 
s 
o 
oo © © © i—i h 
H i— I Cl 
1 1 1 
CD 05 CO 
r-H 
r—< 
I 1 1 
^ rf CO O Cl CO 
ci ci ci co ^ h 
1 
© © © 
© 
1 1 
<3 
Calculated. 
O 
rH 
2 
O 
(H 
1 
*— 1 O O lO 00 o 
N ^ H CO 05 CO 
r-H 
1 1 
Ol 1>- tO 
lO iO CO 
rH 
I 
CD 00 Cl lO G H 
CO lO CO H CO D 1 
1 1 1 1 
95 
1 
- 68 
Observed. 
© 
H 
r—1 
O X 1 D O D 
O CO lO O lO h 
t—H r-H r—H r-H 
1 1 1 I 
CO GO 00 
COD ^ 
r 
lO^DCOOO 
R0 CO lO CO co 
till 
O CO GC 
CO to to 
1 
^H 
r d 
Cu 
<D 
0) 
eg 
CO 00 Cl Cl cq Ol 
00 CO Ol 
D- tO GO CD lO 
D O Cl 
Is 
CO Cl M O N lO 
Ol 05 ^ 
GOOOCCCO 
CO O 05 
r-H r-H r-H r-H 
r-H 
r-H r-H r-H 
l—H 
© 
eg 
1 1 1 
1 II 
r~j 
o 
T-^ 
^—.. 
V 
> 
Cl CD GO lO CD Cl 
CD CO CO 
Cl CO CD Cl ^ CD 
CO © © 
O O O r-H o CO 
^ o o 
05 05 O O 05 CO 
^ Ol GO 
r-H i—H r—H r-H 
rH r-H 
i—H r—^ 
I—H 
r© 
1 1 1 
1 1 1 
co 
o 
t5 
0? 
-JH> 
CD Cl ^ C5 to lO 
^ 1C 00 
O xJH CO LO CO CO 
05 (M D 
CD CD lO CO Cl 
r-H CO 
to O O to ^ co 
'—< iO ^ 
o 
n 
o 
cs 
nd 
o 
> 
rH 05 CD 1C ^ 00 
CD Cl CO 
05 Ol Ol CO lO 
CM CM O' 
eo CO Xr— CO i — i 
r—1 CD 'rH 
^ CO CD to ^ 
r-H i—1 
in 
| | | 
1 1 1 
© 
o 
o ( 
1 
o 
HHHK.KH 
• H- P^ P^ 
H M J 
HHH 
HHHK.L.H 
m m r r k 
E K >< 
3* 
HH i~~ P* 
D. 1— i HH 
HH 
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