412 DK. C. CIIKEE: ANALYSIS OF RESULTS FROM THE KEM' MAGNETOGRAPHS 
Tablp: XXXVII.—Ratios of Fourier Coefficients in Mean Diurnal Inequality 
for the Year. 
Cl. 
CijCi. 
D. 
H. 
N. 1). 
■ 
tv. 
H. 
N. 
D. \\4 
H. N. 
Kew sun-spot minimum 
•86 
•88 
•58 
•61 , -44 
•49 
•31 
•23 
•16 ' -20 
•19 -12 
,, 11 years. 
•77 
•78 
•54 
•58 : -38 
•43 
•25 
•19 
•12 -15 
•14 -09 
,, sun-spot maximum . 
•74 
•74 
•54 
•58 i -35 
•40 
•23 
•19 
•10 -13 
•11 -07 
Greenwich sun-spot maximum 
•63 
— 
•50 
— : ^27 
■ ■ ■ 
•21 
•08 : — 
1 
•10 — 
Table XXXVIII.—Ratios of Fourier Coefficients in Mean Diurnal Inequalities 
for the Three Seasons. 
C’/n. 
rs/ri. 
gA’i- 
"Winter. 
X 
o 
r-* 
r-_i 
1—^ 
Summer. 
1 : 
"Winter. 
i 
Ecjuiiiox. 
<D 
2 
cZ 
"Winter. 
1 
1 
! Erpiinox. 
i 
O 
w 
1 
Declination— 
Kew sun-spot minimum . . . 
•76 
•88 
•84 
•44 
•53 
• 35 
•25 
•23 
•06 
! 11 years. 
•65 
•82 
•78 
•36 
•47 
•32 
•18 
■19 
•04 
j ,, sun-spot maximum . , . 
•61 
•78 
•76 
■32 
•45 
•30 
•17 
•15 
•03 
Greenwich sun-spot maximum . 
•49 
* C8 
•65 
• ’^2 
•33 
■23 
•13 
•12 
•02 
i 
Horizontal force— 
’ Kew sun-spot minimum . . . 
1-58 
•63 
•38 
•89 
•34 
• 22 
•54 
■21 
•11 
j „ 11 years. 
1-07 
•54 
•42 
•50 
•30 
•16 
•31 
•17 
•06 
,, sun-spot maximum . . . 
•88 
•51 
•45 
•34 
•29 
•14 
•23 
•14 
•05 
Greenwich sun-spot maximum . 
•87 
•51 
•39 
■50 
•27 
•11 
•20 
■14 
•05 
Table XXXVII. shows a steady decline in the relative importance of the liigher 
terms of the Fourier series as the sun-spot frequency increases, and this decline is 
accentuated in the Greenwich data. Table XXXA III. shows that the decline apparent 
in the case of the mean inequality for the year is shared in general ly the seasonal 
inequalities, 
§ 49. The angles in the Fourier series were also calculated for each month for the 
several g'roups of years. It will suffice, however, to record the results obtained in 
the case of the inequalities for the three seasons and the year in D and H, adding the 
values for the year in W and N. These appear in Talde XXXIX. I he angles all 
